tests: add a golden cache-format read regression test

The -#A cache self-test writes the cache with the same build it reads back,
a round-trip that by construction cannot catch a read-path or on-disk-ZIP
format regression: a writer and reader that drift together still agree. The
batch-6 read-path bounds work (ZIP_READFIELD_STRING, the r.adr/r.location
NUL invariant) had no guard against exactly that.

Add a hidden -#B subcommand that reads a committed, frozen new.zip
(tests/fixtures/cache-golden) and asserts a fixed set of entries -- normal
HTML, an empty redirect with a Location, JSON, a binary body with embedded
NUL and high bytes plus a Content-Disposition, a 404 -- still decodes field
for field and byte for byte. The fixture is a witness written once by an
earlier build; the table in htscache_selftest.c that defines the
expectations also regenerates it via `-#B <dir> regen`, used only when the
format changes on purpose. Every body stays in the ZIP (all_in_cache=1), so
reading needs only new.zip with no on-disk body, timestamp, or path
dependency -- portable across machines and through make distcheck's
read-only srcdir.

check_entry now also asserts Content-Disposition (cdispo) and tags its
diagnostics with the running mode (cache-selftest vs cache-golden).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Signed-off-by: Xavier Roche <roche@httrack.com>

.clang-format

@@ -0,0 +1,27 @@
+# clang-format 19 config for the HTTrack C engine.
+#
+# IMPORTANT: this is applied to TOUCHED LINES ONLY (via git-clang-format / the
+# CI format check). The engine was originally formatted by GNU indent / by hand
+# and does NOT round-trip through clang-format, so a whole-tree reformat is
+# intentionally never done. Format the lines you change; leave the rest.
+#
+# Reverse-engineered from src/*.c: 2-space indent, no tabs, 80 columns, pointers
+# bound to the name (char *x), attached braces, un-indented case labels, and a
+# space after C-style casts ((int) x). Most of that is LLVM's defaults; the
+# lines below are the deliberate deviations.
+
+BasedOnStyle: LLVM
+
+# Engine specifics / deviations from LLVM:
+SpaceAfterCStyleCast: true   # "(int) x", overwhelmingly dominant (542 vs 7)
+SortIncludes: false          # C include order can be significant; never reorder
+IncludeBlocks: Preserve      # do not merge/reflow include groups
+
+# Stated explicitly for robustness against base-style drift (these match LLVM):
+IndentWidth: 2
+UseTab: Never
+ColumnLimit: 80
+PointerAlignment: Right
+IndentCaseLabels: false
+SpaceBeforeParens: ControlStatements
+AllowShortIfStatementsOnASingleLine: Never

.githooks/README.md

@@ -0,0 +1,35 @@
+# Git hooks
+
+Versioned hooks for this repo. Enable them once per clone:
+
+```sh
+git config core.hooksPath .githooks
+```
+
+## pre-commit: auto-format changed C lines
+
+Runs `git-clang-format` (clang-format 19, using the repo `.clang-format`) on the
+**staged lines only** and re-stages the result, so every commit is
+clang-format-clean and the CI `format` check passes. It never reformats the
+whole tree, only the lines you changed.
+
+- Disable for a single commit: `HTTRACK_NO_AUTOFORMAT=1 git commit ...`
+- If clang-format 19 isn't installed, the hook skips silently (CI still
+  enforces). Install it with your distro's `clang-format-19`, or from
+  apt.llvm.org.
+- If a file has *both* staged and unstaged changes, the hook does not
+  auto-mutate it (that would commit the unstaged part); it instead reports
+  whether its staged lines need formatting and asks you to stage/stash the rest.
+
+### noexec working trees
+
+Git executes the hook directly, so if your working tree is on a `noexec` mount
+git cannot run `.githooks/pre-commit`. Point `core.hooksPath` at a copy on an
+exec filesystem instead:
+
+```sh
+mkdir -p ~/.httrack-hooks && cp .githooks/pre-commit ~/.httrack-hooks/
+chmod +x ~/.httrack-hooks/pre-commit
+git config core.hooksPath ~/.httrack-hooks
+```
+</content>

.githooks/pre-commit

@@ -0,0 +1,71 @@
+#!/usr/bin/env bash
+#
+# Auto-format the staged C lines with clang-format (touched lines only), then
+# re-stage them, so commits stay clang-format-clean and CI's format check passes.
+#
+# Enable once per clone:  git config core.hooksPath .githooks
+# Skip for one commit:    HTTRACK_NO_AUTOFORMAT=1 git commit ...
+#
+# Matches the CI gate (.clang-format, clang-format 19). It only ever touches the
+# lines a commit changes; it never reformats the whole tree.
+
+set -euo pipefail
+
+[ "${HTTRACK_NO_AUTOFORMAT:-}" = "1" ] && exit 0
+
+# Staged C/H files (added/copied/modified/renamed).
+mapfile -t files < <(git diff --cached --name-only --diff-filter=ACMR -- '*.c' '*.h')
+[ "${#files[@]}" -eq 0 ] && exit 0
+
+# Locate clang-format 19 and the git driver; if absent, skip (CI is the backstop).
+cf=""
+for c in clang-format-19 clang-format; do
+    if command -v "$c" >/dev/null 2>&1; then
+        case "$("$c" --version)" in *"version 19."*)
+            cf="$c"
+            break
+            ;;
+        esac
+    fi
+done
+gcf=""
+for g in git-clang-format-19 git-clang-format; do
+    command -v "$g" >/dev/null 2>&1 && {
+        gcf="$g"
+        break
+    }
+done
+if [ -z "$cf" ] || [ -z "$gcf" ]; then
+    echo "pre-commit: clang-format 19 not found; skipping auto-format (CI still checks)." >&2
+    exit 0
+fi
+
+# Files that are staged AND also have unstaged changes: re-staging them would
+# pull in the unstaged work, so don't auto-mutate. Check instead and let the
+# author resolve it.
+partial=()
+for f in "${files[@]}"; do
+    if ! git diff --quiet -- "$f"; then partial+=("$f"); fi
+done
+
+if [ "${#partial[@]}" -ne 0 ]; then
+    d="$("$gcf" --binary "$cf" --style=file --staged --diff --extensions c,h || true)"
+    case "$d" in
+    "" | "no modified files to format" | *"did not modify any files"*)
+        exit 0
+        ;; # staged lines already clean
+    *)
+        echo "pre-commit: these files have both staged and unstaged changes, so" >&2
+        echo "auto-format was skipped to avoid committing unstaged work:" >&2
+        printf '  %s\n' "${partial[@]}" >&2
+        echo "Their staged lines need formatting. Stage the rest (or stash it)," >&2
+        echo "or run: $gcf --binary $cf --staged" >&2
+        exit 1
+        ;;
+    esac
+fi
+
+# Clean-staged files: format the staged lines in the working tree, then re-stage.
+"$gcf" --binary "$cf" --style=file --staged --extensions c,h >/dev/null || true
+git add -- "${files[@]}"
+exit 0

.github/workflows/ci.yml

@@ -31,7 +31,7 @@ jobs:
     env:
       CC: ${{ matrix.cc }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           submodules: recursive
 
@@ -46,8 +46,8 @@ jobs:
       - name: Configure
         run: |
           set -euo pipefail
-          # autoreconf installs the automake test-driver (not committed) and
-          # validates configure.ac, so "make check" works on a fresh checkout.
+          # Regenerate from configure.ac/Makefile.am to validate them; the
+          # committed generated files already let a plain checkout build.
           autoreconf -fi
           ./configure
 
@@ -61,27 +61,335 @@ jobs:
         if: failure()
         run: cat tests/test-suite.log 2>/dev/null || true
 
+  # Portability: build and test on macOS (Darwin/clang) on a native runner --
+  # no VM. The tree has no __APPLE__ branches, so Darwin exercises the
+  # generic-Unix path on a second libc and kernel. brew's openssl@3 is keg-only,
+  # so point configure at it; everything else is in the SDK or default paths.
+  macos:
+    name: build (macOS arm64, clang)
+    runs-on: macos-14
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          submodules: recursive
+
+      - name: Install build dependencies
+        run: |
+          set -euo pipefail
+          brew install autoconf automake libtool autoconf-archive
+
+      - name: Configure
+        run: |
+          set -euo pipefail
+          ssl="$(brew --prefix openssl@3)"
+          autoreconf -fi
+          ./configure CPPFLAGS="-I${ssl}/include" LDFLAGS="-L${ssl}/lib"
+
+      - name: Build
+        run: make -j"$(sysctl -n hw.ncpu)"
+
+      - name: Test
+        run: make check
+
+      - name: Print the test log on failure
+        if: failure()
+        run: cat tests/test-suite.log 2>/dev/null || true
+
+  # Portability/hardening: 32-bit (i386) build on the x86-64 runner via multilib
+  # -- no extra hardware. Exercises the 32-bit size_t/pointer ABI, where size
+  # and bounds math can truncate or wrap in ways 64-bit never reveals (the axis
+  # the overflow-safe bounds work targets). --build (not --host) keeps configure
+  # out of cross mode, so the i386 binary still runs the test suite here.
+  linux-i386:
+    name: build (linux i386, gcc -m32)
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          submodules: recursive
+
+      - name: Install build dependencies (multilib + 32-bit libs)
+        run: |
+          set -euo pipefail
+          sudo dpkg --add-architecture i386
+          sudo apt-get update
+          sudo apt-get install -y --no-install-recommends \
+            build-essential gcc-multilib autoconf automake libtool \
+            autoconf-archive zlib1g-dev:i386 libssl-dev:i386
+
+      - name: Configure
+        run: |
+          set -euo pipefail
+          autoreconf -fi
+          ./configure --build=i686-pc-linux-gnu CC="gcc -m32"
+
+      - name: Build
+        run: make -j"$(nproc)"
+
+      - name: Test
+        run: make check
+
+      - name: Print the test log on failure
+        if: failure()
+        run: cat tests/test-suite.log 2>/dev/null || true
+
+  # Memory safety: build and run the suite under AddressSanitizer +
+  # UndefinedBehaviorSanitizer. The offline engine self-tests drive the parsers
+  # that chew on untrusted crawled input (charset, mime, HTML, entities, IDNA,
+  # filters, cache) straight through the sanitizers, so a buffer overrun,
+  # use-after-free, or signed overflow there fails the build instead of slipping
+  # past a plain -O2 build. gcc's runtimes; one job is enough (the bug class is
+  # arch-independent and the matrix already covers compile portability).
+  sanitize:
+    name: sanitize (ASan+UBSan, gcc)
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          submodules: recursive
+
+      - name: Install build dependencies
+        run: |
+          set -euo pipefail
+          sudo apt-get update
+          sudo apt-get install -y --no-install-recommends \
+            build-essential autoconf automake libtool autoconf-archive \
+            zlib1g-dev libssl-dev
+
+      - name: Configure (sanitized)
+        run: |
+          set -euo pipefail
+          autoreconf -fi
+          ./configure CC=gcc \
+            CFLAGS="-fsanitize=address,undefined -fno-sanitize-recover=all -g -O1 -fno-omit-frame-pointer" \
+            LDFLAGS="-fsanitize=address,undefined"
+
+      - name: Build
+        run: make -j"$(nproc)"
+
+      - name: Test (sanitized)
+        # Leaks at exit are out of scope (the CLI frees little on the way out);
+        # we want memory-safety errors, so turn leak detection off and make every
+        # other finding abort the run.
+        #
+        # Poison fresh allocations with 0xCA and freed blocks with 0xCB (decimal
+        # 202/203) so memory never reads back as accidental zeros: a missing-NUL
+        # fread buffer then runs strlen off into the redzone instead of stopping
+        # at a lucky zero. Distinct bytes tell the two apart in a dump (0xCA =
+        # uninitialized, 0xCB = use-after-free). ASan caps its malloc fill at 4096
+        # bytes by default, so max_malloc_fill_size lifts it to cover large cache
+        # buffers; free_fill flags use-after-free reads.
+        env:
+          ASAN_OPTIONS: detect_leaks=0:abort_on_error=1:halt_on_error=1:strict_string_checks=1:malloc_fill_byte=202:max_malloc_fill_size=2147483647:free_fill_byte=203:max_free_fill_size=2147483647
+          UBSAN_OPTIONS: print_stacktrace=1:halt_on_error=1
+        run: make check
+
+      - name: Print the test log on failure
+        if: failure()
+        run: cat tests/test-suite.log 2>/dev/null || true
+
+  # Optional-dependency build: compile and test with HTTPS/OpenSSL disabled --
+  # the configuration users on minimal systems build, and one libssl is not even
+  # installed here so configure cannot silently re-enable it. The matrix above
+  # always has libssl, so the #if HTS_USEOPENSSL branches would otherwise never
+  # be compiled and could rot unnoticed.
+  no-ssl:
+    name: build (no openssl, --disable-https)
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          submodules: recursive
+
+      - name: Install build dependencies (no libssl)
+        run: |
+          set -euo pipefail
+          sudo apt-get update
+          sudo apt-get install -y --no-install-recommends \
+            build-essential autoconf automake libtool autoconf-archive zlib1g-dev
+
+      - name: Configure (https disabled)
+        run: |
+          set -euo pipefail
+          autoreconf -fi
+          ./configure --disable-https
+
+      - name: Build
+        run: make -j"$(nproc)"
+
+      - name: Test
+        run: make check
+
+      - name: Print the test log on failure
+        if: failure()
+        run: cat tests/test-suite.log 2>/dev/null || true
+
+  # Validate the Debian packaging via the same script maintainers release with.
+  # One amd64/gcc run is enough: packaging (control/rules/manifest/lintian/quilt
+  # source build) is arch- and compiler-independent, and the build matrix above
+  # already covers compile portability. lintian runs with --fail-on=error.
+  deb:
+    name: deb package (lintian)
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          submodules: recursive
+
+      - name: Install packaging toolchain
+        run: |
+          set -euo pipefail
+          sudo apt-get update
+          sudo apt-get install -y --no-install-recommends \
+            build-essential autoconf automake libtool autoconf-archive \
+            zlib1g-dev libssl-dev \
+            debhelper devscripts lintian fakeroot
+
+      # --unsigned: CI has no GPG key (also skips the release sig/checksums).
+      # debuild builds every package, then lintian gates on errors.
+      #
+      # DEB_BUILD_OPTIONS trims work CI does not need (release builds via
+      # mkdeb.sh are untouched): noautodbgsym drops the -dbgsym packages whose
+      # LTO payloads are slow to compress and that CI never ships; parallel uses
+      # every core. We let debuild run its test pass -- the only one now that
+      # mkdeb no longer runs its own -- so CI exercises the packaged tests.
+      - name: Build Debian packages
+        run: |
+          export DEB_BUILD_OPTIONS="noautodbgsym parallel=$(nproc)"
+          bash tools/mkdeb.sh --unsigned --no-release-artifacts
+
+  # Release-tarball integrity: `make distcheck` rolls the dist tarball, then
+  # configures, builds and tests it out-of-tree from a read-only source tree and
+  # checks nothing is left behind. Catches a file referenced in *_SOURCES or
+  # EXTRA_DIST but missing from the tarball -- the same "ships broken to users"
+  # class as a stale committed Makefile.in.
+  distcheck:
+    name: distcheck (release tarball)
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          submodules: recursive
+
+      - name: Install build dependencies
+        run: |
+          set -euo pipefail
+          sudo apt-get update
+          sudo apt-get install -y --no-install-recommends \
+            build-essential autoconf automake libtool autoconf-archive \
+            zlib1g-dev libssl-dev
+
+      - name: distcheck
+        run: |
+          set -euo pipefail
+          autoreconf -fi
+          ./configure
+          make -j"$(nproc)" distcheck
+
+  dco:
+    name: DCO sign-off
+    # Only checkable on a PR, where we have the base..head commit range.
+    if: github.event_name == 'pull_request'
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          fetch-depth: 0
+
+      - name: Every commit must be signed off
+        env:
+          BASE: ${{ github.event.pull_request.base.sha }}
+          HEAD: ${{ github.event.pull_request.head.sha }}
+        run: |
+          set -euo pipefail
+          fail=0
+          # --no-merges: merge commits are GitHub-generated and carry no sign-off.
+          for sha in $(git rev-list --no-merges "$BASE..$HEAD"); do
+            if [ -z "$(git log -1 --format='%(trailers:key=Signed-off-by)' "$sha")" ]; then
+              echo "Missing Signed-off-by: $(git log -1 --format='%h %s' "$sha")"
+              fail=1
+            fi
+          done
+          if [ "$fail" -ne 0 ]; then
+            echo
+            echo "Sign commits with 'git commit -s'; fix a branch with 'git rebase --signoff $BASE'."
+            echo "See CONTRIBUTING.md (Developer Certificate of Origin)."
+            exit 1
+          fi
+
   lint:
     name: lint (shellcheck, shfmt)
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Install linters
-        env:
-          SHFMT_VERSION: v3.8.0
         run: |
           set -euo pipefail
           sudo apt-get update
-          sudo apt-get install -y --no-install-recommends shellcheck
-          # shfmt is not packaged in apt; fetch a pinned release binary.
-          curl -fsSL -o /tmp/shfmt \
-            "https://github.com/mvdan/sh/releases/download/${SHFMT_VERSION}/shfmt_${SHFMT_VERSION}_linux_$(dpkg --print-architecture)"
-          sudo install -m 0755 /tmp/shfmt /usr/local/bin/shfmt
+          # noble ships shfmt 3.8.0 (universe), matching the pinned local dev
+          # version; use it rather than fetching a release binary from github.com.
+          sudo apt-get install -y --no-install-recommends shellcheck shfmt
+          shfmt --version
 
       # Lint the scripts we maintain; the legacy scripts are a separate cleanup.
       - name: shellcheck
-        run: shellcheck man/makeman.sh tools/mkdeb.sh tests/*.test tests/check-network.sh
+        run: shellcheck man/makeman.sh tools/mkdeb.sh .githooks/pre-commit tests/*.test tests/check-network.sh
 
       - name: shfmt
-        run: shfmt -d -i 4 man/makeman.sh tools/mkdeb.sh
+        run: shfmt -d -i 4 man/makeman.sh tools/mkdeb.sh .githooks/pre-commit
+
+  # Check clang-format on CHANGED LINES ONLY. The engine predates clang-format
+  # (it was shaped by an old Visual Studio formatter) and does not round-trip,
+  # so we never reformat the whole tree -- only the lines a PR touches.
+  format:
+    name: format (clang-format-19, changed lines)
+    if: github.event_name == 'pull_request'
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          fetch-depth: 0
+
+      - name: Install clang-format 19 (pinned, from apt.llvm.org)
+        run: |
+          set -euo pipefail
+          # ubuntu-24.04's native clang-format is 18; pin 19 to match local dev.
+          wget -qO- https://apt.llvm.org/llvm-snapshot.gpg.key \
+            | sudo tee /etc/apt/trusted.gpg.d/apt.llvm.org.asc >/dev/null
+          echo "deb http://apt.llvm.org/noble/ llvm-toolchain-noble-19 main" \
+            | sudo tee /etc/apt/sources.list.d/llvm-19.list >/dev/null
+          sudo apt-get update
+          sudo apt-get install -y --no-install-recommends clang-format-19
+          # The clang-format-19 package ships the git-clang-format driver;
+          # expose it unsuffixed so "git clang-format" finds it.
+          sudo ln -sf /usr/bin/git-clang-format-19 /usr/local/bin/git-clang-format
+          clang-format-19 --version
+
+      - name: Check formatting of changed lines
+        run: |
+          set -euo pipefail
+          git fetch --no-tags origin \
+            "+refs/heads/${{ github.base_ref }}:refs/remotes/origin/${{ github.base_ref }}"
+          base="origin/${{ github.base_ref }}"
+          set +e
+          diff="$(git clang-format --binary clang-format-19 --style=file \
+                    --diff --extensions c,h "$base")"
+          rc=$?
+          set -e
+          # Classify by output, not exit code: a non-empty diff means "not
+          # clean" (git-clang-format may exit 0 or 1 on a diff). A nonzero exit
+          # with clean output is a real checker error.
+          case "$diff" in
+            "" | "no modified files to format" | *"did not modify any files"*)
+              if [ "$rc" -ne 0 ]; then
+                echo "::error::git clang-format failed (exit $rc): checker error."
+                exit 1
+              fi
+              echo "Formatting OK: changed C lines are clang-format-clean." ;;
+            *)
+              echo "$diff"
+              echo "::error::Changed C lines are not clang-format-clean."
+              echo "Fix locally with: git clang-format --binary clang-format-19 $base"
+              exit 1 ;;
+          esac

.gitignore

@@ -0,0 +1,41 @@
+# Generated by autoreconf/bootstrap (run ./bootstrap after a fresh clone).
+# Release tarballs ("make dist") ship these; the git tree does not.
+/configure
+/config.h.in
+/config.h.in~
+/aclocal.m4
+/ltmain.sh
+/libtool
+/config.guess
+/config.sub
+/install-sh
+/missing
+/depcomp
+/compile
+/ar-lib
+/test-driver
+/autom4te.cache/
+/m4/libtool.m4
+/m4/lt*.m4
+Makefile.in
+
+# Generated by configure / make.
+/config.h
+/config.log
+/config.status
+/stamp-h1
+Makefile
+.deps/
+.libs/
+*.o
+*.lo
+*.la
+*.so
+*.so.*
+*.a
+
+# make dist output.
+/httrack-*.tar.gz
+
+# Editor / autotools backup files.
+*~

AGENTS.md

@@ -0,0 +1,72 @@
+# AGENTS.md — working in the HTTrack tree
+
+Policy and PR etiquette live in [CONTRIBUTING.md](CONTRIBUTING.md). This file is
+the operational checklist: toolchain, invariants, and how to ship a change.
+
+## Build & test
+- Fresh clone first: `git submodule update --init src/coucal`
+- `./bootstrap` (regenerates `configure` via `autoreconf`; needs autoconf,
+  automake, libtool), then `bash configure && make && make check`. Or run
+  `sh build.sh` to do bootstrap + configure + make in one shot.
+
+## Hard invariants
+- **Generated autotools files are NOT in git.** `configure`, every
+  `Makefile.in`, `config.h.in`, `ltmain.sh`, `config.guess/sub`, and the aux
+  scripts are build products: `.gitignore`d, regenerated by `./bootstrap`, and
+  shipped only in `make dist` tarballs (so tarball users still need no
+  autotools). Never commit them. After editing `configure.ac`, any
+  `Makefile.am`, or `m4/`, just commit those sources — re-run `./bootstrap`
+  locally to rebuild and test, but do not stage the regenerated output.
+- **Format only changed lines** with `git clang-format` (clang-format 19). Never
+  reformat untouched code: the engine was formatted by an old tool and won't
+  round-trip.
+- **Byte-safe edits.** Files with raw high bytes are ISO-8859-1 (French
+  comments). Edit them byte-wise (`perl -0pi`, `sed`), not through a tool that
+  re-encodes to UTF-8 and corrupts them.
+
+## Security (HTTrack parses hostile input off the network)
+- Bounds-check every copy. Overflow-safe form: put the untrusted value alone,
+  `untrusted < limit - controlled` — never `controlled + untrusted < limit`,
+  which can wrap and pass.
+
+## Code & prose
+- Be terse. Comment the why, in English; translate French comments you touch.
+- Strip AI tells from prose (em-dash overuse, rule-of-three, filler, vague
+  attributions). Ref: Wikipedia "Signs of AI writing". Claude Code: `/humanizer`.
+- Behavior change → add a test. Fast path: a hidden `httrack -#N` debug
+  subcommand (`htscoremain.c`) driven by a `tests/NN_*.test`, over a slow crawl.
+
+## Review your change adversarially (strongly suggested)
+Before pushing, and when reviewing others, don't skim for bugs:
+- **One invariant at a time.** Name a property the diff must preserve (bounds
+  hold, cache/wire format unchanged, no use-after-free, ABI stable), then
+  construct inputs that would break it. "General correctness" is not a charter.
+- **Audit tests against the spec, not the code.** For each new test ask: "what
+  buggy path would still pass this?" If you can build one, the test is
+  confirmation-biased: assertions copied from observed output lock bugs in.
+- **Risk areas need runtime probes.** Touching hostile-input parsing, struct
+  layout/ABI, cache/wire format, or a security path? A static or unit check
+  isn't enough; exercise the wrong behavior at runtime. Claude Code:
+  `/review-recipe`.
+
+## Commits
+- **Sign-off is mandatory.** Every commit carries a `Signed-off-by` trailer:
+  `git commit -s` (DCO, CI-enforced — unsigned commits are rejected).
+- **Co-Authored-By is mandatory for AI-assisted commits.** Carry a
+  `Co-Authored-By:` trailer naming the assistant. Attribute there, never in a
+  PR-body footer.
+- PRs land as a merge commit; every commit on the branch goes onto master, so
+  keep each commit message clean and meaningful.
+
+## PR descriptions
+- Plain concise prose; lead with what changed and why. No What/Why/How template.
+- Title names the problem, not the implementation.
+- Don't restate the diff — give what it can't show: motivation, context,
+  tradeoffs, risk.
+- Length tracks the change: a typo is one sentence; a security fix earns a writeup.
+- Verify claims against the code before you write them; flag drift, don't repeat it.
+- Don't hard-wrap (GitHub reflows). No "Generated with Claude" footer. Run the
+  prose through `/humanizer`.
+
+## Toolchain
+C · clang-format-19 · autoreconf · shfmt + shellcheck (shell) · black + flake8 (Python)

CLAUDE.md

@@ -0,0 +1 @@
+@AGENTS.md

CODE_OF_CONDUCT.md

@@ -0,0 +1,83 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our community a harassment-free experience for everyone, regardless of age, body size, visible or invisible disability, ethnicity, sex characteristics, gender identity and expression, level of experience, education, socio-economic status, nationality, personal appearance, race, caste, color, religion, or sexual identity and orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming, diverse, inclusive, and healthy community.
+
+## Our Standards
+
+Examples of behavior that contributes to a positive environment for our community include:
+
+* Demonstrating empathy and kindness toward other people
+* Being respectful of differing opinions, viewpoints, and experiences
+* Giving and gracefully accepting constructive feedback
+* Accepting responsibility and apologizing to those affected by our mistakes, and learning from the experience
+* Focusing on what is best not just for us as individuals, but for the overall community
+
+Examples of unacceptable behavior include:
+
+* The use of sexualized language or imagery, and sexual attention or advances of any kind
+* Trolling, insulting or derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or email address, without their explicit permission
+* Other conduct which could reasonably be considered inappropriate in a professional setting
+
+## Enforcement Responsibilities
+
+Community leaders are responsible for clarifying and enforcing our standards of acceptable behavior and will take appropriate and fair corrective action in response to any behavior that they deem inappropriate, threatening, offensive, or harmful.
+
+Community leaders have the right and responsibility to remove, edit, or reject comments, commits, code, wiki edits, issues, and other contributions that are not aligned to this Code of Conduct, and will communicate reasons for moderation decisions when appropriate.
+
+## Scope
+
+This Code of Conduct applies within all community spaces, and also applies when an individual is officially representing the community in public spaces. Examples of representing our community include using an official e-mail address, posting via an official social media account, or acting as an appointed representative at an online or offline event.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be reported to the community leaders responsible for enforcement at <roche@httrack.com>. All complaints will be reviewed and investigated promptly and fairly.
+
+All community leaders are obligated to respect the privacy and security of the reporter of any incident.
+
+## Enforcement Guidelines
+
+Community leaders will follow these Community Impact Guidelines in determining the consequences for any action they deem in violation of this Code of Conduct:
+
+### 1. Correction
+
+**Community Impact**: Use of inappropriate language or other behavior deemed unprofessional or unwelcome in the community.
+
+**Consequence**: A private, written warning from community leaders, providing clarity around the nature of the violation and an explanation of why the behavior was inappropriate. A public apology may be requested.
+
+### 2. Warning
+
+**Community Impact**: A violation through a single incident or series of actions.
+
+**Consequence**: A warning with consequences for continued behavior. No interaction with the people involved, including unsolicited interaction with those enforcing the Code of Conduct, for a specified period of time. This includes avoiding interactions in community spaces as well as external channels like social media. Violating these terms may lead to a temporary or permanent ban.
+
+### 3. Temporary Ban
+
+**Community Impact**: A serious violation of community standards, including sustained inappropriate behavior.
+
+**Consequence**: A temporary ban from any sort of interaction or public communication with the community for a specified period of time. No public or private interaction with the people involved, including unsolicited interaction with those enforcing the Code of Conduct, is allowed during this period. Violating these terms may lead to a permanent ban.
+
+### 4. Permanent Ban
+
+**Community Impact**: Demonstrating a pattern of violation of community standards, including sustained inappropriate behavior, harassment of an individual, or aggression toward or disparagement of classes of individuals.
+
+**Consequence**: A permanent ban from any sort of public interaction within the community.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 2.1, available at [https://www.contributor-covenant.org/version/2/1/code_of_conduct.html][v2.1].
+
+Community Impact Guidelines were inspired by [Mozilla's code of conduct enforcement ladder][Mozilla CoC].
+
+For answers to common questions about this code of conduct, see the FAQ at [https://www.contributor-covenant.org/faq][FAQ]. Translations are available at [https://www.contributor-covenant.org/translations][translations].
+
+[homepage]: https://www.contributor-covenant.org
+[v2.1]: https://www.contributor-covenant.org/version/2/1/code_of_conduct.html
+[Mozilla CoC]: https://github.com/mozilla/diversity
+[FAQ]: https://www.contributor-covenant.org/faq
+[translations]: https://www.contributor-covenant.org/translations

CONTRIBUTING.md

@@ -0,0 +1,45 @@
+# Contributing to HTTrack
+
+HTTrack is small and old. Keep changes easy to review and safe to merge. Working
+with an AI assistant? The operational checklist is [AGENTS.md](AGENTS.md).
+
+## Pull requests
+
+- One change per PR. Small diffs merge fast.
+- PRs land as a merge commit, so the branch's commits go onto master as-is: keep
+  each commit message clean and explain *why*.
+- Be terse in the PR title and description: name the problem, not the fix, don't
+  restate the diff, and calibrate length to the change.
+- Add or update tests for engine changes (`tests/`), and keep CI green.
+
+## Style
+
+- C, matching nearby code. **Format only the lines you change** (`git
+  clang-format` against the repo `.clang-format`). Never reformat untouched code.
+- Comment the *why*, in English.
+- HTTrack parses hostile input off the network. Check bounds, avoid unchecked
+  copies, and never let an attacker-controlled length drive arithmetic unchecked.
+
+## Sign your work
+
+Every commit needs a `Signed-off-by` line, the
+[DCO](https://developercertificate.org/): `git commit -s`. CI rejects unsigned
+commits; fix a branch with `git rebase --signoff master`.
+
+## AI assistants
+
+Welcome, and nothing to disclose. Two rules:
+
+- **Own every line** as if you wrote it. Can't explain it in review? Not ready.
+- **Don't push your work onto reviewers.** A raw generated patch a maintainer has
+  to vet from scratch will be closed.
+- **Attribution is mandatory.** AI-assisted commits must carry a
+  `Co-Authored-By:` trailer naming the assistant, not a footer in the PR
+  description.
+
+The sign-off covers AI-assisted code too.
+
+## Bugs
+
+Open an issue with the version, OS, command used, and expected vs actual result.
+For security issues see [SECURITY.md](SECURITY.md), not a public issue.

INSTALL

@@ -1,177 +1,177 @@
 Installation Instructions
 *************************
 
-   Copyright (C) 1994-1996, 1999-2002, 2004-2017, 2020-2021 Free
-Software Foundation, Inc.
-
-   Copying and distribution of this file, with or without modification,
-are permitted in any medium without royalty provided the copyright
-notice and this notice are preserved.  This file is offered as-is,
-without warranty of any kind.
-
 Basic Installation
 ==================
 
-   Briefly, the shell command './configure && make && make install'
-should configure, build, and install this package.  The following
-more-detailed instructions are generic; see the 'README' file for
-instructions specific to this package.  Some packages provide this
-'INSTALL' file but do not implement all of the features documented
-below.  The lack of an optional feature in a given package is not
-necessarily a bug.  More recommendations for GNU packages can be found
-in *note Makefile Conventions: (standards)Makefile Conventions.
+   The following shell commands:
 
-   The 'configure' shell script attempts to guess correct values for
+     test -f configure || ./bootstrap
+     ./configure
+     make
+     make install
+
+should configure, build, and install this package.  The first line,
+which bootstraps, is intended for developers; when building from
+distribution tarballs it does nothing and can be skipped.
+
+   The following more-detailed instructions are generic; see the
+‘README’ file for instructions specific to this package.  Some packages
+provide this ‘INSTALL’ file but do not implement all of the features
+documented below.  The lack of an optional feature in a given package is
+not necessarily a bug.  More recommendations for GNU packages can be
+found in the GNU Coding Standards.
+
+   Many packages have scripts meant for developers instead of ordinary
+builders, as they may use developer tools that are less commonly
+installed, or they may access the network, which has privacy
+implications.  If the ‘bootstrap’ shell script exists, it attempts to
+build the ‘configure’ shell script and related files, possibly using
+developer tools or the network.  Because the output of ‘bootstrap’ is
+system-independent, it is normally run by a package developer so that
+its output can be put into the distribution tarball and ordinary
+builders and users need not run ‘bootstrap’.  Some packages have
+commands like ‘./autopull.sh’ and ‘./autogen.sh’ that you can run
+instead of ‘./bootstrap’, for more fine-grained control over
+bootstrapping.
+
+   The ‘configure’ shell script attempts to guess correct values for
 various system-dependent variables used during compilation.  It uses
-those values to create a 'Makefile' in each directory of the package.
-It may also create one or more '.h' files containing system-dependent
-definitions.  Finally, it creates a shell script 'config.status' that
+those values to create a ‘Makefile’ in each directory of the package.
+It may also create one or more ‘.h’ files containing system-dependent
+definitions.  Finally, it creates a shell script ‘config.status’ that
 you can run in the future to recreate the current configuration, and a
-file 'config.log' containing compiler output (useful mainly for
-debugging 'configure').
+file ‘config.log’ containing output useful for debugging ‘configure’.
 
-   It can also use an optional file (typically called 'config.cache' and
-enabled with '--cache-file=config.cache' or simply '-C') that saves the
+   It can also use an optional file (typically called ‘config.cache’ and
+enabled with ‘--cache-file=config.cache’ or simply ‘-C’) that saves the
 results of its tests to speed up reconfiguring.  Caching is disabled by
 default to prevent problems with accidental use of stale cache files.
 
    If you need to do unusual things to compile the package, please try
-to figure out how 'configure' could check whether to do them, and mail
-diffs or instructions to the address given in the 'README' so they can
+to figure out how ‘configure’ could check whether to do them, and mail
+diffs or instructions to the address given in the ‘README’ so they can
 be considered for the next release.  If you are using the cache, and at
-some point 'config.cache' contains results you don't want to keep, you
+some point ‘config.cache’ contains results you don’t want to keep, you
 may remove or edit it.
 
-   The file 'configure.ac' (or 'configure.in') is used to create
-'configure' by a program called 'autoconf'.  You need 'configure.ac' if
-you want to change it or regenerate 'configure' using a newer version of
-'autoconf'.
+   The ‘autoconf’ program generates ‘configure’ from the file
+‘configure.ac’.  Normally you should edit ‘configure.ac’ instead of
+editing ‘configure’ directly.
 
    The simplest way to compile this package is:
 
-  1. 'cd' to the directory containing the package's source code and type
-     './configure' to configure the package for your system.
+  1. ‘cd’ to the directory containing the package’s source code.
 
-     Running 'configure' might take a while.  While running, it prints
-     some messages telling which features it is checking for.
+  2. If this is a developer checkout and file ‘configure’ does not yet
+     exist, type ‘./bootstrap’ to create it.  You may need special
+     developer tools and network access to bootstrap, and the network
+     access may have privacy implications.
 
-  2. Type 'make' to compile the package.
+  3. Type ‘./configure’ to configure the package for your system.  This
+     might take a while.  While running, ‘configure’ prints messages
+     telling which features it is checking for.
 
-  3. Optionally, type 'make check' to run any self-tests that come with
+  4. Type ‘make’ to compile the package.
+
+  5. Optionally, type ‘make check’ to run any self-tests that come with
      the package, generally using the just-built uninstalled binaries.
 
-  4. Type 'make install' to install the programs and any data files and
+  6. Type ‘make install’ to install the programs and any data files and
      documentation.  When installing into a prefix owned by root, it is
      recommended that the package be configured and built as a regular
-     user, and only the 'make install' phase executed with root
+     user, and only the ‘make install’ phase executed with root
      privileges.
 
-  5. Optionally, type 'make installcheck' to repeat any self-tests, but
+  7. Optionally, type ‘make installcheck’ to repeat any self-tests, but
      this time using the binaries in their final installed location.
      This target does not install anything.  Running this target as a
-     regular user, particularly if the prior 'make install' required
+     regular user, particularly if the prior ‘make install’ required
      root privileges, verifies that the installation completed
      correctly.
 
-  6. You can remove the program binaries and object files from the
-     source code directory by typing 'make clean'.  To also remove the
-     files that 'configure' created (so you can compile the package for
-     a different kind of computer), type 'make distclean'.  There is
-     also a 'make maintainer-clean' target, but that is intended mainly
-     for the package's developers.  If you use it, you may have to get
-     all sorts of other programs in order to regenerate files that came
-     with the distribution.
+  8. You can remove the program binaries and object files from the
+     source code directory by typing ‘make clean’.  To also remove the
+     files that ‘configure’ created (so you can compile the package for
+     a different kind of computer), type ‘make distclean’.  There is
+     also a ‘make maintainer-clean’ target, but that is intended mainly
+     for the package’s developers.  If you use it, you may have to
+     bootstrap again.
 
-  7. Often, you can also type 'make uninstall' to remove the installed
-     files again.  In practice, not all packages have tested that
-     uninstallation works correctly, even though it is required by the
-     GNU Coding Standards.
-
-  8. Some packages, particularly those that use Automake, provide 'make
-     distcheck', which can by used by developers to test that all other
-     targets like 'make install' and 'make uninstall' work correctly.
-     This target is generally not run by end users.
+  9. If the package follows the GNU Coding Standards, you can type ‘make
+     uninstall’ to remove the installed files.
 
 Compilers and Options
 =====================
 
    Some systems require unusual options for compilation or linking that
-the 'configure' script does not know about.  Run './configure --help'
+the ‘configure’ script does not know about.  Run ‘./configure --help’
 for details on some of the pertinent environment variables.
 
-   You can give 'configure' initial values for configuration parameters
+   You can give ‘configure’ initial values for configuration parameters
 by setting variables in the command line or in the environment.  Here is
 an example:
 
-     ./configure CC=c99 CFLAGS=-g LIBS=-lposix
+     ./configure CC=gcc CFLAGS=-g LIBS=-lposix
 
-   *Note Defining Variables::, for more details.
+   See “Defining Variables” for more details.
 
 Compiling For Multiple Architectures
 ====================================
 
    You can compile the package for more than one kind of computer at the
-same time, by placing the object files for each architecture in their
-own directory.  To do this, you can use GNU 'make'.  'cd' to the
-directory where you want the object files and executables to go and run
-the 'configure' script.  'configure' automatically checks for the source
-code in the directory that 'configure' is in and in '..'.  This is known
-as a "VPATH" build.
+same time, by placing the object files for each system in their own
+directory.  To do this, you can use GNU ‘make’.  ‘cd’ to the directory
+where you want the object files and executables to go and run the
+‘configure’ script.  ‘configure’ automatically checks for the source
+code in the directory that ‘configure’ is in and in ‘..’.  This is known
+as a “VPATH” build.
 
-   With a non-GNU 'make', it is safer to compile the package for one
-architecture at a time in the source code directory.  After you have
-installed the package for one architecture, use 'make distclean' before
-reconfiguring for another architecture.
+   With a non-GNU ‘make’, it is safer to compile the package for one
+system at a time in the source code directory.  After you have installed
+the package for one system, use ‘make distclean’ before reconfiguring
+for another system.
 
-   On MacOS X 10.5 and later systems, you can create libraries and
-executables that work on multiple system types--known as "fat" or
-"universal" binaries--by specifying multiple '-arch' options to the
-compiler but only a single '-arch' option to the preprocessor.  Like
-this:
-
-     ./configure CC="gcc -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
-                 CXX="g++ -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
-                 CPP="gcc -E" CXXCPP="g++ -E"
-
-   This is not guaranteed to produce working output in all cases, you
-may have to build one architecture at a time and combine the results
-using the 'lipo' tool if you have problems.
+   Some platforms, notably macOS, support “fat” or “universal” binaries,
+where a single binary can execute on different architectures.  On these
+platforms you can configure and compile just once, with options specific
+to that platform.
 
 Installation Names
 ==================
 
-   By default, 'make install' installs the package's commands under
-'/usr/local/bin', include files under '/usr/local/include', etc.  You
-can specify an installation prefix other than '/usr/local' by giving
-'configure' the option '--prefix=PREFIX', where PREFIX must be an
+   By default, ‘make install’ installs the package’s commands under
+‘/usr/local/bin’, include files under ‘/usr/local/include’, etc.  You
+can specify an installation prefix other than ‘/usr/local’ by giving
+‘configure’ the option ‘--prefix=PREFIX’, where PREFIX must be an
 absolute file name.
 
    You can specify separate installation prefixes for
 architecture-specific files and architecture-independent files.  If you
-pass the option '--exec-prefix=PREFIX' to 'configure', the package uses
+pass the option ‘--exec-prefix=PREFIX’ to ‘configure’, the package uses
 PREFIX as the prefix for installing programs and libraries.
 Documentation and other data files still use the regular prefix.
 
    In addition, if you use an unusual directory layout you can give
-options like '--bindir=DIR' to specify different values for particular
-kinds of files.  Run 'configure --help' for a list of the directories
+options like ‘--bindir=DIR’ to specify different values for particular
+kinds of files.  Run ‘configure --help’ for a list of the directories
 you can set and what kinds of files go in them.  In general, the default
-for these options is expressed in terms of '${prefix}', so that
-specifying just '--prefix' will affect all of the other directory
+for these options is expressed in terms of ‘${prefix}’, so that
+specifying just ‘--prefix’ will affect all of the other directory
 specifications that were not explicitly provided.
 
    The most portable way to affect installation locations is to pass the
-correct locations to 'configure'; however, many packages provide one or
+correct locations to ‘configure’; however, many packages provide one or
 both of the following shortcuts of passing variable assignments to the
-'make install' command line to change installation locations without
+‘make install’ command line to change installation locations without
 having to reconfigure or recompile.
 
    The first method involves providing an override variable for each
-affected directory.  For example, 'make install
-prefix=/alternate/directory' will choose an alternate location for all
+affected directory.  For example, ‘make install
+prefix=/alternate/directory’ will choose an alternate location for all
 directory configuration variables that were expressed in terms of
-'${prefix}'.  Any directories that were specified during 'configure',
-but not in terms of '${prefix}', must each be overridden at install time
+‘${prefix}’.  Any directories that were specified during ‘configure’,
+but not in terms of ‘${prefix}’, must each be overridden at install time
 for the entire installation to be relocated.  The approach of makefile
 variable overrides for each directory variable is required by the GNU
 Coding Standards, and ideally causes no recompilation.  However, some
@@ -179,190 +179,187 @@ platforms have known limitations with the semantics of shared libraries
 that end up requiring recompilation when using this method, particularly
 noticeable in packages that use GNU Libtool.
 
-   The second method involves providing the 'DESTDIR' variable.  For
-example, 'make install DESTDIR=/alternate/directory' will prepend
-'/alternate/directory' before all installation names.  The approach of
-'DESTDIR' overrides is not required by the GNU Coding Standards, and
+   The second method involves providing the ‘DESTDIR’ variable.  For
+example, ‘make install DESTDIR=/alternate/directory’ will prepend
+‘/alternate/directory’ before all installation names.  The approach of
+‘DESTDIR’ overrides is not required by the GNU Coding Standards, and
 does not work on platforms that have drive letters.  On the other hand,
 it does better at avoiding recompilation issues, and works well even
-when some directory options were not specified in terms of '${prefix}'
-at 'configure' time.
+when some directory options were not specified in terms of ‘${prefix}’
+at ‘configure’ time.
 
 Optional Features
 =================
 
    If the package supports it, you can cause programs to be installed
-with an extra prefix or suffix on their names by giving 'configure' the
-option '--program-prefix=PREFIX' or '--program-suffix=SUFFIX'.
+with an extra prefix or suffix on their names by giving ‘configure’ the
+option ‘--program-prefix=PREFIX’ or ‘--program-suffix=SUFFIX’.
 
-   Some packages pay attention to '--enable-FEATURE' options to
-'configure', where FEATURE indicates an optional part of the package.
-They may also pay attention to '--with-PACKAGE' options, where PACKAGE
-is something like 'gnu-as' or 'x' (for the X Window System).  The
-'README' should mention any '--enable-' and '--with-' options that the
-package recognizes.
-
-   For packages that use the X Window System, 'configure' can usually
-find the X include and library files automatically, but if it doesn't,
-you can use the 'configure' options '--x-includes=DIR' and
-'--x-libraries=DIR' to specify their locations.
+   Some packages pay attention to ‘--enable-FEATURE’ and
+‘--disable-FEATURE’ options to ‘configure’, where FEATURE indicates an
+optional part of the package.  They may also pay attention to
+‘--with-PACKAGE’ and ‘--without-PACKAGE’ options, where PACKAGE is
+something like ‘gnu-ld’.  ‘./configure --help’ should mention the
+‘--enable-...’ and ‘--with-...’ options that the package recognizes.
 
    Some packages offer the ability to configure how verbose the
-execution of 'make' will be.  For these packages, running './configure
---enable-silent-rules' sets the default to minimal output, which can be
-overridden with 'make V=1'; while running './configure
---disable-silent-rules' sets the default to verbose, which can be
-overridden with 'make V=0'.
+execution of ‘make’ will be.  For these packages, running ‘./configure
+--enable-silent-rules’ sets the default to minimal output, which can be
+overridden with ‘make V=1’; while running ‘./configure
+--disable-silent-rules’ sets the default to verbose, which can be
+overridden with ‘make V=0’.
 
-Particular systems
-==================
+Specifying a System Type
+========================
 
-   On HP-UX, the default C compiler is not ANSI C compatible.  If GNU CC
-is not installed, it is recommended to use the following options in
-order to use an ANSI C compiler:
+   By default ‘configure’ builds for the current system.  To create
+binaries that can run on a different system type, specify a
+‘--host=TYPE’ option along with compiler variables that specify how to
+generate object code for TYPE.  For example, to create binaries intended
+to run on a 64-bit ARM processor:
 
-     ./configure CC="cc -Ae -D_XOPEN_SOURCE=500"
+     ./configure --host=aarch64-linux-gnu \
+        CC=aarch64-linux-gnu-gcc \
+        CXX=aarch64-linux-gnu-g++
 
-and if that doesn't work, install pre-built binaries of GCC for HP-UX.
+If done on a machine that can execute these binaries (e.g., via
+‘qemu-aarch64’, ‘$QEMU_LD_PREFIX’, and Linux’s ‘binfmt_misc’
+capability), the build behaves like a native build.  Otherwise it is a
+cross-build: ‘configure’ will make cross-compilation guesses instead of
+running test programs, and ‘make check’ will not work.
 
-   HP-UX 'make' updates targets which have the same timestamps as their
-prerequisites, which makes it generally unusable when shipped generated
-files such as 'configure' are involved.  Use GNU 'make' instead.
+   A system type can either be a short name like ‘mingw64’, or a
+canonical name like ‘x86_64-pc-linux-gnu’.  Canonical names have the
+form CPU-COMPANY-SYSTEM where SYSTEM is either OS or KERNEL-OS.  To
+canonicalize and validate a system type, you can run the command
+‘config.sub’, which is often squirreled away in a subdirectory like
+‘build-aux’.  For example:
 
-   On OSF/1 a.k.a. Tru64, some versions of the default C compiler cannot
-parse its '<wchar.h>' header file.  The option '-nodtk' can be used as a
-workaround.  If GNU CC is not installed, it is therefore recommended to
-try
+     $ build-aux/config.sub arm64-linux
+     aarch64-unknown-linux-gnu
+     $ build-aux/config.sub riscv-lnx
+     Invalid configuration 'riscv-lnx': OS 'lnx' not recognized
 
-     ./configure CC="cc"
+You can look at the ‘config.sub’ file to see which types are recognized.
+If the file is absent, this package does not need the system type.
 
-and if that doesn't work, try
+   If ‘configure’ fails with the diagnostic “cannot guess build type”.
+‘config.sub’ did not recognize your system’s type.  In this case, first
+fetch the newest versions of these files from the GNU config package
+(https://savannah.gnu.org/projects/config).  If that fixes things,
+please report it to the maintainers of the package containing
+‘configure’.  Otherwise, you can try the configure option ‘--build=TYPE’
+where TYPE comes close to your system type; also, please report the
+problem to <config-patches@gnu.org>.
 
-     ./configure CC="cc -nodtk"
-
-   On Solaris, don't put '/usr/ucb' early in your 'PATH'.  This
-directory contains several dysfunctional programs; working variants of
-these programs are available in '/usr/bin'.  So, if you need '/usr/ucb'
-in your 'PATH', put it _after_ '/usr/bin'.
-
-   On Haiku, software installed for all users goes in '/boot/common',
-not '/usr/local'.  It is recommended to use the following options:
-
-     ./configure --prefix=/boot/common
-
-Specifying the System Type
-==========================
-
-   There may be some features 'configure' cannot figure out
-automatically, but needs to determine by the type of machine the package
-will run on.  Usually, assuming the package is built to be run on the
-_same_ architectures, 'configure' can figure that out, but if it prints
-a message saying it cannot guess the machine type, give it the
-'--build=TYPE' option.  TYPE can either be a short name for the system
-type, such as 'sun4', or a canonical name which has the form:
-
-     CPU-COMPANY-SYSTEM
-
-where SYSTEM can have one of these forms:
-
-     OS
-     KERNEL-OS
-
-   See the file 'config.sub' for the possible values of each field.  If
-'config.sub' isn't included in this package, then this package doesn't
-need to know the machine type.
-
-   If you are _building_ compiler tools for cross-compiling, you should
-use the option '--target=TYPE' to select the type of system they will
-produce code for.
-
-   If you want to _use_ a cross compiler, that generates code for a
-platform different from the build platform, you should specify the
-"host" platform (i.e., that on which the generated programs will
-eventually be run) with '--host=TYPE'.
+   For more details about configuring system types, see the Autoconf
+documentation.
 
 Sharing Defaults
 ================
 
-   If you want to set default values for 'configure' scripts to share,
-you can create a site shell script called 'config.site' that gives
-default values for variables like 'CC', 'cache_file', and 'prefix'.
-'configure' looks for 'PREFIX/share/config.site' if it exists, then
-'PREFIX/etc/config.site' if it exists.  Or, you can set the
-'CONFIG_SITE' environment variable to the location of the site script.
-A warning: not all 'configure' scripts look for a site script.
+   If you want to set default values for ‘configure’ scripts to share,
+you can create a site shell script called ‘config.site’ that gives
+default values for variables like ‘CC’, ‘cache_file’, and ‘prefix’.
+‘configure’ looks for ‘PREFIX/share/config.site’ if it exists, then
+‘PREFIX/etc/config.site’ if it exists.  Or, you can set the
+‘CONFIG_SITE’ environment variable to the location of the site script.
+A warning: not all ‘configure’ scripts look for a site script.
 
 Defining Variables
 ==================
 
    Variables not defined in a site shell script can be set in the
-environment passed to 'configure'.  However, some packages may run
+environment passed to ‘configure’.  However, some packages may run
 configure again during the build, and the customized values of these
 variables may be lost.  In order to avoid this problem, you should set
-them in the 'configure' command line, using 'VAR=value'.  For example:
+them in the ‘configure’ command line, using ‘VAR=value’.  For example:
 
      ./configure CC=/usr/local2/bin/gcc
 
-causes the specified 'gcc' to be used as the C compiler (unless it is
+causes the specified ‘gcc’ to be used as the C compiler (unless it is
 overridden in the site shell script).
 
-Unfortunately, this technique does not work for 'CONFIG_SHELL' due to an
+Unfortunately, this technique does not work for ‘CONFIG_SHELL’ due to an
 Autoconf limitation.  Until the limitation is lifted, you can use this
 workaround:
 
      CONFIG_SHELL=/bin/bash ./configure CONFIG_SHELL=/bin/bash
 
-'configure' Invocation
+‘configure’ Invocation
 ======================
 
-   'configure' recognizes the following options to control how it
+   ‘configure’ recognizes the following options to control how it
 operates.
 
-'--help'
-'-h'
-     Print a summary of all of the options to 'configure', and exit.
+‘--help’
+‘-h’
+     Print a summary of all of the options to ‘configure’, and exit.
 
-'--help=short'
-'--help=recursive'
-     Print a summary of the options unique to this package's
-     'configure', and exit.  The 'short' variant lists options used only
-     in the top level, while the 'recursive' variant lists options also
+‘--help=short’
+‘--help=recursive’
+     Print a summary of the options unique to this package’s
+     ‘configure’, and exit.  The ‘short’ variant lists options used only
+     in the top level, while the ‘recursive’ variant lists options also
      present in any nested packages.
 
-'--version'
-'-V'
-     Print the version of Autoconf used to generate the 'configure'
+‘--version’
+‘-V’
+     Print the version of Autoconf used to generate the ‘configure’
      script, and exit.
 
-'--cache-file=FILE'
+‘--cache-file=FILE’
      Enable the cache: use and save the results of the tests in FILE,
-     traditionally 'config.cache'.  FILE defaults to '/dev/null' to
+     traditionally ‘config.cache’.  FILE defaults to ‘/dev/null’ to
      disable caching.
 
-'--config-cache'
-'-C'
-     Alias for '--cache-file=config.cache'.
+‘--config-cache’
+‘-C’
+     Alias for ‘--cache-file=config.cache’.
 
-'--quiet'
-'--silent'
-'-q'
-     Do not print messages saying which checks are being made.  To
-     suppress all normal output, redirect it to '/dev/null' (any error
-     messages will still be shown).
+‘--srcdir=DIR’
+     Look for the package’s source code in directory DIR.  Usually
+     ‘configure’ can determine that directory automatically.
 
-'--srcdir=DIR'
-     Look for the package's source code in directory DIR.  Usually
-     'configure' can determine that directory automatically.
-
-'--prefix=DIR'
-     Use DIR as the installation prefix.  *note Installation Names:: for
+‘--prefix=DIR’
+     Use DIR as the installation prefix.  See “Installation Names” for
      more details, including other options available for fine-tuning the
      installation locations.
 
-'--no-create'
-'-n'
+‘--host=TYPE’
+     Build binaries for system TYPE.  See “Specifying a System Type”.
+
+‘--enable-FEATURE’
+‘--disable-FEATURE’
+     Enable or disable the optional FEATURE.  See “Optional Features”.
+
+‘--with-PACKAGE’
+‘--without-PACKAGE’
+     Use or omit PACKAGE when building.  See “Optional Features”.
+
+‘--quiet’
+‘--silent’
+‘-q’
+     Do not print messages saying which checks are being made.  To
+     suppress all normal output, redirect it to ‘/dev/null’ (any error
+     messages will still be shown).
+
+‘--no-create’
+‘-n’
      Run the configure checks, but stop before creating any output
      files.
 
-'configure' also accepts some other, not widely useful, options.  Run
-'configure --help' for more details.
+‘configure’ also recognizes several environment variables, and accepts
+some other, less widely useful, options.  Run ‘configure --help’ for
+more details.
+
+Copyright notice
+================
+
+   Copyright © 1994–1996, 1999–2002, 2004–2017, 2020–2024 Free Software
+Foundation, Inc.
+
+   Copying and distribution of this file, with or without modification,
+are permitted in any medium without royalty provided the copyright
+notice and this notice are preserved.  This file is offered as-is,
+without warranty of any kind.

INSTALL.Linux

@@ -7,4 +7,15 @@ On most systems (including GNU/Linux), installing can be easily achieved using t
 -or- (if not compiling as root)
 ./configure --prefix=$HOME && make && make install
 
+Building from a git checkout (not a release tarball) first needs the build
+system regenerated, which requires autoconf, automake and libtool:
+
+./bootstrap
+./configure && make && make install
+
+You can also use the one-shot wrapper, which runs bootstrap, configure and make
+(extra arguments are passed to configure):
+
+./build.sh --prefix=$HOME
+
 See also the INSTALL generic help file.

Makefile.am

@@ -5,7 +5,8 @@ ACLOCAL_AMFLAGS = -I m4
 
 EXTRA_DIST = INSTALL.Linux \
 		gpl-fr.txt license.txt greetings.txt history.txt \
-		httrack-doc.html lang.def README.md tools/mkdeb.sh
+		httrack-doc.html lang.def README.md tools/mkdeb.sh \
+		bootstrap build.sh
 
 # Build the signed Debian packages from a clean source export. Pass the signing
 # key and other options through DEB_FLAGS, e.g.:

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README

@@ -4,11 +4,9 @@ Copyright (C) 1998-2017 Xavier Roche and other contributors
 Welcome to HTTrack Website Copier!
 
 
-Ethical use:
-
-We ask that you do not use HTTrack to grab email addresses or to collect any
-other private information on people. This would disgrace our work and the many
-hours we have spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 
 Information:

README.md

@@ -22,8 +22,22 @@ HTTrack can also update an existing mirrored site, and resume interrupted downlo
 http://www.httrack.com/
 
 ## Compile trunk release
+
+A git checkout ships only the autotools sources, so `./bootstrap` (which runs
+`autoreconf`) regenerates `configure` first; this needs autoconf, automake and
+libtool. Released tarballs already include `configure`, so building from a
+tarball skips `./bootstrap`.
+
 ```sh
 git clone https://github.com/xroche/httrack.git --recurse-submodules
 cd httrack
+./bootstrap
 ./configure --prefix=$HOME/usr && make -j8 && make install
 ```
+
+Or use the one-shot wrapper (bootstrap + configure + make), which forwards its
+arguments to `configure`:
+
+```sh
+./build.sh --prefix=$HOME/usr
+```

SECURITY.md

@@ -0,0 +1,23 @@
+# Security Policy
+
+## Reporting
+
+Report privately, not in a public issue or PR: use GitHub
+[private advisories](https://github.com/xroche/httrack/security/advisories/new)
+or email <roche@httrack.com> (alternate: `xroche at gmail dot com`).
+
+Include the HTTrack version and platform, a concrete reproduction (command line,
+a sample page or server response, or a small proof of concept), and what an
+attacker gains. We'll acknowledge it and keep you posted. Please allow time for a
+release before disclosing publicly.
+
+## Supported versions
+
+Fixes land on `master` and ship in the next release; older releases aren't
+maintained. Confirm against current `master` when you can.
+
+## AI-assisted findings
+
+Scanners and LLMs are fine, but only send reports you have verified yourself. A
+confirmed, reproducible issue is worth our time; a plausible one that doesn't
+reproduce is not, and will be closed. If a report is AI-assisted, say so.

bootstrap

@@ -0,0 +1,24 @@
+#!/bin/sh
+#
+# Regenerate the autotools build system (configure, Makefile.in, config.h.in,
+# libtool, the aux scripts) from configure.ac and the Makefile.am files.
+#
+# Run this once after a fresh git clone, before ./configure. Release tarballs
+# (made with "make dist") already ship these files, so people building from a
+# tarball do not need autotools and do not run this.
+#
+# Requires: autoconf, automake, libtool (the autoreconf toolchain).
+
+set -e
+
+# shellcheck disable=SC1007  # "CDPATH= cd" is a deliberate empty-CDPATH prefix.
+srcdir=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)
+cd "$srcdir"
+
+if ! command -v autoreconf >/dev/null 2>&1; then
+    echo "bootstrap: autoreconf not found; install autoconf, automake and libtool" >&2
+    echo "           (or build from a release tarball, which ships ./configure)" >&2
+    exit 1
+fi
+
+exec autoreconf -fi "$@"

build.sh

@@ -0,0 +1,34 @@
+#!/bin/sh
+#
+# One-shot build from a git checkout: bootstrap (autoreconf) -> configure -> make.
+# A convenience wrapper; the canonical steps are ./bootstrap && ./configure && make.
+#
+# Extra arguments are passed straight to ./configure, e.g.
+#   ./build.sh --prefix="$HOME" --disable-https
+#
+# Build out of tree (recommended; required if the source tree is read-only or
+# mounted noexec) by pointing BUILD_DIR at a scratch directory:
+#   BUILD_DIR=/var/tmp/httrack-build ./build.sh
+#
+# On a noexec filesystem the executable bit does not take effect, so invoke the
+# script explicitly with sh:  sh build.sh
+#
+# Requires autoconf/automake/libtool (for bootstrap); the release tarball ships
+# ./configure, so from a tarball just run ./configure && make.
+
+set -e
+
+# shellcheck disable=SC1007  # "CDPATH= cd" is a deliberate empty-CDPATH prefix.
+srcdir=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)
+
+# 1. Regenerate the build system in the source tree (autotools requires it).
+sh "$srcdir/bootstrap"
+
+# 2. Configure and build, out of tree when BUILD_DIR is set.
+builddir=${BUILD_DIR:-$srcdir}
+mkdir -p "$builddir"
+cd "$builddir"
+# Invoke configure via the shell, not execve: it is a portable sh script, and a
+# noexec source tree (or a cleared executable bit) would make ./configure fail.
+"${CONFIG_SHELL:-/bin/sh}" "$srcdir/configure" "$@"
+make

compile

@@ -1,348 +0,0 @@
-#! /bin/sh
-# Wrapper for compilers which do not understand '-c -o'.
-
-scriptversion=2018-03-07.03; # UTC
-
-# Copyright (C) 1999-2021 Free Software Foundation, Inc.
-# Written by Tom Tromey <tromey@cygnus.com>.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2, or (at your option)
-# any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-# As a special exception to the GNU General Public License, if you
-# distribute this file as part of a program that contains a
-# configuration script generated by Autoconf, you may include it under
-# the same distribution terms that you use for the rest of that program.
-
-# This file is maintained in Automake, please report
-# bugs to <bug-automake@gnu.org> or send patches to
-# <automake-patches@gnu.org>.
-
-nl='
-'
-
-# We need space, tab and new line, in precisely that order.  Quoting is
-# there to prevent tools from complaining about whitespace usage.
-IFS=" ""	$nl"
-
-file_conv=
-
-# func_file_conv build_file lazy
-# Convert a $build file to $host form and store it in $file
-# Currently only supports Windows hosts. If the determined conversion
-# type is listed in (the comma separated) LAZY, no conversion will
-# take place.
-func_file_conv ()
-{
-  file=$1
-  case $file in
-    / | /[!/]*) # absolute file, and not a UNC file
-      if test -z "$file_conv"; then
-	# lazily determine how to convert abs files
-	case `uname -s` in
-	  MINGW*)
-	    file_conv=mingw
-	    ;;
-	  CYGWIN* | MSYS*)
-	    file_conv=cygwin
-	    ;;
-	  *)
-	    file_conv=wine
-	    ;;
-	esac
-      fi
-      case $file_conv/,$2, in
-	*,$file_conv,*)
-	  ;;
-	mingw/*)
-	  file=`cmd //C echo "$file " | sed -e 's/"\(.*\) " *$/\1/'`
-	  ;;
-	cygwin/* | msys/*)
-	  file=`cygpath -m "$file" || echo "$file"`
-	  ;;
-	wine/*)
-	  file=`winepath -w "$file" || echo "$file"`
-	  ;;
-      esac
-      ;;
-  esac
-}
-
-# func_cl_dashL linkdir
-# Make cl look for libraries in LINKDIR
-func_cl_dashL ()
-{
-  func_file_conv "$1"
-  if test -z "$lib_path"; then
-    lib_path=$file
-  else
-    lib_path="$lib_path;$file"
-  fi
-  linker_opts="$linker_opts -LIBPATH:$file"
-}
-
-# func_cl_dashl library
-# Do a library search-path lookup for cl
-func_cl_dashl ()
-{
-  lib=$1
-  found=no
-  save_IFS=$IFS
-  IFS=';'
-  for dir in $lib_path $LIB
-  do
-    IFS=$save_IFS
-    if $shared && test -f "$dir/$lib.dll.lib"; then
-      found=yes
-      lib=$dir/$lib.dll.lib
-      break
-    fi
-    if test -f "$dir/$lib.lib"; then
-      found=yes
-      lib=$dir/$lib.lib
-      break
-    fi
-    if test -f "$dir/lib$lib.a"; then
-      found=yes
-      lib=$dir/lib$lib.a
-      break
-    fi
-  done
-  IFS=$save_IFS
-
-  if test "$found" != yes; then
-    lib=$lib.lib
-  fi
-}
-
-# func_cl_wrapper cl arg...
-# Adjust compile command to suit cl
-func_cl_wrapper ()
-{
-  # Assume a capable shell
-  lib_path=
-  shared=:
-  linker_opts=
-  for arg
-  do
-    if test -n "$eat"; then
-      eat=
-    else
-      case $1 in
-	-o)
-	  # configure might choose to run compile as 'compile cc -o foo foo.c'.
-	  eat=1
-	  case $2 in
-	    *.o | *.[oO][bB][jJ])
-	      func_file_conv "$2"
-	      set x "$@" -Fo"$file"
-	      shift
-	      ;;
-	    *)
-	      func_file_conv "$2"
-	      set x "$@" -Fe"$file"
-	      shift
-	      ;;
-	  esac
-	  ;;
-	-I)
-	  eat=1
-	  func_file_conv "$2" mingw
-	  set x "$@" -I"$file"
-	  shift
-	  ;;
-	-I*)
-	  func_file_conv "${1#-I}" mingw
-	  set x "$@" -I"$file"
-	  shift
-	  ;;
-	-l)
-	  eat=1
-	  func_cl_dashl "$2"
-	  set x "$@" "$lib"
-	  shift
-	  ;;
-	-l*)
-	  func_cl_dashl "${1#-l}"
-	  set x "$@" "$lib"
-	  shift
-	  ;;
-	-L)
-	  eat=1
-	  func_cl_dashL "$2"
-	  ;;
-	-L*)
-	  func_cl_dashL "${1#-L}"
-	  ;;
-	-static)
-	  shared=false
-	  ;;
-	-Wl,*)
-	  arg=${1#-Wl,}
-	  save_ifs="$IFS"; IFS=','
-	  for flag in $arg; do
-	    IFS="$save_ifs"
-	    linker_opts="$linker_opts $flag"
-	  done
-	  IFS="$save_ifs"
-	  ;;
-	-Xlinker)
-	  eat=1
-	  linker_opts="$linker_opts $2"
-	  ;;
-	-*)
-	  set x "$@" "$1"
-	  shift
-	  ;;
-	*.cc | *.CC | *.cxx | *.CXX | *.[cC]++)
-	  func_file_conv "$1"
-	  set x "$@" -Tp"$file"
-	  shift
-	  ;;
-	*.c | *.cpp | *.CPP | *.lib | *.LIB | *.Lib | *.OBJ | *.obj | *.[oO])
-	  func_file_conv "$1" mingw
-	  set x "$@" "$file"
-	  shift
-	  ;;
-	*)
-	  set x "$@" "$1"
-	  shift
-	  ;;
-      esac
-    fi
-    shift
-  done
-  if test -n "$linker_opts"; then
-    linker_opts="-link$linker_opts"
-  fi
-  exec "$@" $linker_opts
-  exit 1
-}
-
-eat=
-
-case $1 in
-  '')
-     echo "$0: No command.  Try '$0 --help' for more information." 1>&2
-     exit 1;
-     ;;
-  -h | --h*)
-    cat <<\EOF
-Usage: compile [--help] [--version] PROGRAM [ARGS]
-
-Wrapper for compilers which do not understand '-c -o'.
-Remove '-o dest.o' from ARGS, run PROGRAM with the remaining
-arguments, and rename the output as expected.
-
-If you are trying to build a whole package this is not the
-right script to run: please start by reading the file 'INSTALL'.
-
-Report bugs to <bug-automake@gnu.org>.
-EOF
-    exit $?
-    ;;
-  -v | --v*)
-    echo "compile $scriptversion"
-    exit $?
-    ;;
-  cl | *[/\\]cl | cl.exe | *[/\\]cl.exe | \
-  icl | *[/\\]icl | icl.exe | *[/\\]icl.exe )
-    func_cl_wrapper "$@"      # Doesn't return...
-    ;;
-esac
-
-ofile=
-cfile=
-
-for arg
-do
-  if test -n "$eat"; then
-    eat=
-  else
-    case $1 in
-      -o)
-	# configure might choose to run compile as 'compile cc -o foo foo.c'.
-	# So we strip '-o arg' only if arg is an object.
-	eat=1
-	case $2 in
-	  *.o | *.obj)
-	    ofile=$2
-	    ;;
-	  *)
-	    set x "$@" -o "$2"
-	    shift
-	    ;;
-	esac
-	;;
-      *.c)
-	cfile=$1
-	set x "$@" "$1"
-	shift
-	;;
-      *)
-	set x "$@" "$1"
-	shift
-	;;
-    esac
-  fi
-  shift
-done
-
-if test -z "$ofile" || test -z "$cfile"; then
-  # If no '-o' option was seen then we might have been invoked from a
-  # pattern rule where we don't need one.  That is ok -- this is a
-  # normal compilation that the losing compiler can handle.  If no
-  # '.c' file was seen then we are probably linking.  That is also
-  # ok.
-  exec "$@"
-fi
-
-# Name of file we expect compiler to create.
-cofile=`echo "$cfile" | sed 's|^.*[\\/]||; s|^[a-zA-Z]:||; s/\.c$/.o/'`
-
-# Create the lock directory.
-# Note: use '[/\\:.-]' here to ensure that we don't use the same name
-# that we are using for the .o file.  Also, base the name on the expected
-# object file name, since that is what matters with a parallel build.
-lockdir=`echo "$cofile" | sed -e 's|[/\\:.-]|_|g'`.d
-while true; do
-  if mkdir "$lockdir" >/dev/null 2>&1; then
-    break
-  fi
-  sleep 1
-done
-# FIXME: race condition here if user kills between mkdir and trap.
-trap "rmdir '$lockdir'; exit 1" 1 2 15
-
-# Run the compile.
-"$@"
-ret=$?
-
-if test -f "$cofile"; then
-  test "$cofile" = "$ofile" || mv "$cofile" "$ofile"
-elif test -f "${cofile}bj"; then
-  test "${cofile}bj" = "$ofile" || mv "${cofile}bj" "$ofile"
-fi
-
-rmdir "$lockdir"
-exit $ret
-
-# Local Variables:
-# mode: shell-script
-# sh-indentation: 2
-# eval: (add-hook 'before-save-hook 'time-stamp)
-# time-stamp-start: "scriptversion="
-# time-stamp-format: "%:y-%02m-%02d.%02H"
-# time-stamp-time-zone: "UTC0"
-# time-stamp-end: "; # UTC"
-# End:

config.h.in

@@ -1,218 +0,0 @@
-/* config.h.in.  Generated from configure.ac by autoheader.  */
-
-/* Check for dlopen in c */
-#undef DLLIB
-
-/* Define if pointers to integers require aligned access */
-#undef HAVE_ALIGNED_ACCESS_REQUIRED
-
-/* Define to 1 if you have the <dlfcn.h> header file. */
-#undef HAVE_DLFCN_H
-
-/* Define to 1 if you have the <execinfo.h> header file. */
-#undef HAVE_EXECINFO_H
-
-/* Define to 1 if you have the <inttypes.h> header file. */
-#undef HAVE_INTTYPES_H
-
-/* Define to 1 if you have the `z' library (-lz). */
-#undef HAVE_LIBZ
-
-/* Define to 1 if you have the <minix/config.h> header file. */
-#undef HAVE_MINIX_CONFIG_H
-
-/* Define to 1 if you have the `snprintf' function. */
-#undef HAVE_SNPRINTF
-
-/* Define to 1 if you have the <stdint.h> header file. */
-#undef HAVE_STDINT_H
-
-/* Define to 1 if you have the <stdio.h> header file. */
-#undef HAVE_STDIO_H
-
-/* Define to 1 if you have the <stdlib.h> header file. */
-#undef HAVE_STDLIB_H
-
-/* Define to 1 if you have the <strings.h> header file. */
-#undef HAVE_STRINGS_H
-
-/* Define to 1 if you have the <string.h> header file. */
-#undef HAVE_STRING_H
-
-/* Check for strnlen */
-#undef HAVE_STRNLEN
-
-/* Define to 1 if you have the <sys/stat.h> header file. */
-#undef HAVE_SYS_STAT_H
-
-/* Define to 1 if you have the <sys/types.h> header file. */
-#undef HAVE_SYS_TYPES_H
-
-/* Define to 1 if you have the <unistd.h> header file. */
-#undef HAVE_UNISTD_H
-
-/* Define to 1 or 0, depending whether the compiler supports simple visibility
-   declarations. */
-#undef HAVE_VISIBILITY
-
-/* Define to 1 if you have the `vsnprintf' function. */
-#undef HAVE_VSNPRINTF
-
-/* Define to 1 if you have the <wchar.h> header file. */
-#undef HAVE_WCHAR_H
-
-/* Check for in_addr_t */
-#undef HTS_DO_NOT_REDEFINE_in_addr_t
-
-/* Check for IPv6 */
-#undef HTS_INET6
-
-/* Check for large files support */
-#undef HTS_LFS
-
-/* Check for OpenSSL */
-#undef HTS_USEOPENSSL
-
-/* Check for libiconv */
-#undef LIBICONV
-
-/* Check for libsocket */
-#undef LIBSOCKET
-
-/* Define to the sub-directory where libtool stores uninstalled libraries. */
-#undef LT_OBJDIR
-
-/* Name of package */
-#undef PACKAGE
-
-/* Define to the address where bug reports for this package should be sent. */
-#undef PACKAGE_BUGREPORT
-
-/* Define to the full name of this package. */
-#undef PACKAGE_NAME
-
-/* Define to the full name and version of this package. */
-#undef PACKAGE_STRING
-
-/* Define to the one symbol short name of this package. */
-#undef PACKAGE_TARNAME
-
-/* Define to the home page for this package. */
-#undef PACKAGE_URL
-
-/* Define to the version of this package. */
-#undef PACKAGE_VERSION
-
-/* "enable replacement (v)snprintf if system (v)snprintf is broken" */
-#undef PREFER_PORTABLE_SNPRINTF
-
-/* Check for setuid */
-#undef SETUID
-
-/* The size of `long long', as computed by sizeof. */
-#undef SIZEOF_LONG_LONG
-
-/* Define to 1 if all of the C90 standard headers exist (not just the ones
-   required in a freestanding environment). This macro is provided for
-   backward compatibility; new code need not use it. */
-#undef STDC_HEADERS
-
-/* Check for pthread in pthreads */
-#undef THREADS
-
-/* Enable extensions on AIX 3, Interix.  */
-#ifndef _ALL_SOURCE
-# undef _ALL_SOURCE
-#endif
-/* Enable general extensions on macOS.  */
-#ifndef _DARWIN_C_SOURCE
-# undef _DARWIN_C_SOURCE
-#endif
-/* Enable general extensions on Solaris.  */
-#ifndef __EXTENSIONS__
-# undef __EXTENSIONS__
-#endif
-/* Enable GNU extensions on systems that have them.  */
-#ifndef _GNU_SOURCE
-# undef _GNU_SOURCE
-#endif
-/* Enable X/Open compliant socket functions that do not require linking
-   with -lxnet on HP-UX 11.11.  */
-#ifndef _HPUX_ALT_XOPEN_SOCKET_API
-# undef _HPUX_ALT_XOPEN_SOCKET_API
-#endif
-/* Identify the host operating system as Minix.
-   This macro does not affect the system headers' behavior.
-   A future release of Autoconf may stop defining this macro.  */
-#ifndef _MINIX
-# undef _MINIX
-#endif
-/* Enable general extensions on NetBSD.
-   Enable NetBSD compatibility extensions on Minix.  */
-#ifndef _NETBSD_SOURCE
-# undef _NETBSD_SOURCE
-#endif
-/* Enable OpenBSD compatibility extensions on NetBSD.
-   Oddly enough, this does nothing on OpenBSD.  */
-#ifndef _OPENBSD_SOURCE
-# undef _OPENBSD_SOURCE
-#endif
-/* Define to 1 if needed for POSIX-compatible behavior.  */
-#ifndef _POSIX_SOURCE
-# undef _POSIX_SOURCE
-#endif
-/* Define to 2 if needed for POSIX-compatible behavior.  */
-#ifndef _POSIX_1_SOURCE
-# undef _POSIX_1_SOURCE
-#endif
-/* Enable POSIX-compatible threading on Solaris.  */
-#ifndef _POSIX_PTHREAD_SEMANTICS
-# undef _POSIX_PTHREAD_SEMANTICS
-#endif
-/* Enable extensions specified by ISO/IEC TS 18661-5:2014.  */
-#ifndef __STDC_WANT_IEC_60559_ATTRIBS_EXT__
-# undef __STDC_WANT_IEC_60559_ATTRIBS_EXT__
-#endif
-/* Enable extensions specified by ISO/IEC TS 18661-1:2014.  */
-#ifndef __STDC_WANT_IEC_60559_BFP_EXT__
-# undef __STDC_WANT_IEC_60559_BFP_EXT__
-#endif
-/* Enable extensions specified by ISO/IEC TS 18661-2:2015.  */
-#ifndef __STDC_WANT_IEC_60559_DFP_EXT__
-# undef __STDC_WANT_IEC_60559_DFP_EXT__
-#endif
-/* Enable extensions specified by ISO/IEC TS 18661-4:2015.  */
-#ifndef __STDC_WANT_IEC_60559_FUNCS_EXT__
-# undef __STDC_WANT_IEC_60559_FUNCS_EXT__
-#endif
-/* Enable extensions specified by ISO/IEC TS 18661-3:2015.  */
-#ifndef __STDC_WANT_IEC_60559_TYPES_EXT__
-# undef __STDC_WANT_IEC_60559_TYPES_EXT__
-#endif
-/* Enable extensions specified by ISO/IEC TR 24731-2:2010.  */
-#ifndef __STDC_WANT_LIB_EXT2__
-# undef __STDC_WANT_LIB_EXT2__
-#endif
-/* Enable extensions specified by ISO/IEC 24747:2009.  */
-#ifndef __STDC_WANT_MATH_SPEC_FUNCS__
-# undef __STDC_WANT_MATH_SPEC_FUNCS__
-#endif
-/* Enable extensions on HP NonStop.  */
-#ifndef _TANDEM_SOURCE
-# undef _TANDEM_SOURCE
-#endif
-/* Enable X/Open extensions.  Define to 500 only if necessary
-   to make mbstate_t available.  */
-#ifndef _XOPEN_SOURCE
-# undef _XOPEN_SOURCE
-#endif
-
-
-/* Version number of package */
-#undef VERSION
-
-/* in_port_t */
-#undef in_port_t
-
-/* sa_family_t */
-#undef sa_family_t

configure.ac

@@ -18,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 ])
@@ -31,7 +29,9 @@ AC_CONFIG_SRCDIR(src/httrack.c)
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_HEADERS(config.h)
 AM_INIT_AUTOMAKE([subdir-objects])
-VERSION_INFO="2:49:0"
+# 3:0:0: htsblk layout changed (contenttype/charset/contentencoding widened to
+# 128), an incompatible ABI break, so bump current and reset revision/age.
+VERSION_INFO="3:0:0"
 AM_MAINTAINER_MODE
 AC_USE_SYSTEM_EXTENSIONS
 
@@ -50,6 +50,9 @@ LT_INIT
 AC_PROG_LN_S
 LT_INIT
 
+# bash, used to run the test scripts (see tests/Makefile.am TEST_LOG_COMPILER)
+AC_PATH_PROGS([BASH], [bash], [/bin/bash])
+
 # Export LD_LIBRARY_PATH name or equivalent.
 AC_SUBST(SHLIBPATH_VAR,$shlibpath_var)
 
@@ -81,6 +84,11 @@ AX_CHECK_COMPILE_FLAG([-Wformat-nonliteral], [DEFAULT_CFLAGS="$DEFAULT_CFLAGS -W
 AX_CHECK_COMPILE_FLAG([-Wmissing-parameter-type], [DEFAULT_CFLAGS="$DEFAULT_CFLAGS -Wmissing-parameter-type"])
 AX_CHECK_COMPILE_FLAG([-Wold-style-definition], [DEFAULT_CFLAGS="$DEFAULT_CFLAGS -Wold-style-definition"])
 AX_CHECK_COMPILE_FLAG([-Wignored-qualifiers], [DEFAULT_CFLAGS="$DEFAULT_CFLAGS -Wignored-qualifiers"])
+# Make htssafe.h's pointer-dest 'warning' attribute a hard error in our build
+# (migration is at zero; a new char* dest is a regression). gcc/clang each take
+# only their own spelling; downstream keeps the plain warning, not a build break.
+AX_CHECK_COMPILE_FLAG([-Werror=attribute-warning], [DEFAULT_CFLAGS="$DEFAULT_CFLAGS -Werror=attribute-warning"])
+AX_CHECK_COMPILE_FLAG([-Werror=user-defined-warnings], [DEFAULT_CFLAGS="$DEFAULT_CFLAGS -Werror=user-defined-warnings"])
 AX_CHECK_COMPILE_FLAG([-fstrict-aliasing -Wstrict-aliasing], [DEFAULT_CFLAGS="$DEFAULT_CFLAGS -fstrict-aliasing -Wstrict-aliasing"])
 AX_CHECK_COMPILE_FLAG([-fstack-protector], [DEFAULT_CFLAGS="$DEFAULT_CFLAGS -fstack-protector"])
 AX_CHECK_COMPILE_FLAG([-fstack-clash-protection], [DEFAULT_CFLAGS="$DEFAULT_CFLAGS -fstack-clash-protection"])
@@ -90,6 +98,13 @@ AX_CHECK_LINK_FLAG([-Wl,--no-undefined], [DEFAULT_LDFLAGS="$DEFAULT_LDFLAGS -Wl,
 AX_CHECK_LINK_FLAG([-Wl,-z,relro,-z,now], [DEFAULT_LDFLAGS="$DEFAULT_LDFLAGS -Wl,-z,relro,-z,now"])
 AX_CHECK_LINK_FLAG([-Wl,-z,noexecstack], [DEFAULT_LDFLAGS="$DEFAULT_LDFLAGS -Wl,-z,noexecstack"])
 
+# Force libc back into DT_NEEDED for libraries that reach it only through
+# libhttrack (libhtsjava, the libtest callbacks), but only with a GNU-style
+# linker; Apple ld rejects these flags and links libSystem unconditionally.
+AX_CHECK_LINK_FLAG([-Wl,--push-state,--no-as-needed,-lc,--pop-state],
+	[LIBC_FORCE_LINK="-Wl,--push-state,--no-as-needed,-lc,--pop-state"])
+AC_SUBST([LIBC_FORCE_LINK])
+
 ### PIE
 CFLAGS_PIE=""
 LDFLAGS_PIE=""

debian/changelog

@@ -8,6 +8,11 @@ httrack (3.49.8-1) unstable; urgency=medium
     common-licenses/GPL-3, use a secure version=4 watch file, add
     Rules-Requires-Root and Vcs-Browser, and override the false-positive
     source-is-missing on the bundled HTML documentation.
+  * Refresh the webhttrack browser dependency: drop the removed alternatives
+    (iceape-browser, iceweasel, icecat, mozilla, firefox, mozilla-firefox)
+    that no longer exist in Debian and triggered half-broken relationships on
+    the QA debcheck page. Depend on firefox-esr | chromium | www-browser
+    instead.
 
  -- Xavier Roche <xavier@debian.org>  Sun, 07 Jun 2026 14:29:24 +0200
 

debian/control

@@ -30,7 +30,7 @@ Description: Copy websites to your computer (Offline browser)
 Package: webhttrack
 Architecture: any
 Multi-Arch: foreign
-Depends: ${misc:Depends}, ${shlibs:Depends}, webhttrack-common, sensible-utils, iceape-browser | iceweasel | icecat | mozilla | firefox | mozilla-firefox | www-browser
+Depends: ${misc:Depends}, ${shlibs:Depends}, webhttrack-common, sensible-utils, firefox-esr | chromium | www-browser
 Replaces: webhttrack-common (<< 3.43.9-2)
 Breaks: webhttrack-common (<< 3.43.9-2)
 Suggests: httrack, httrack-doc

debian/httrack-doc.lintian-overrides

@@ -1,2 +1,6 @@
-httrack-doc: extra-license-file usr/share/httrack/html/license.txt
-httrack-doc: package-contains-documentation-outside-usr-share-doc usr/share/httrack/*
+# httrack ships its HTML manual (and the bundled license) under
+# /usr/share/httrack/html by design; /usr/share/doc/httrack/html symlinks into
+# it (see debian/rules). These are pointed hints whose match context is empty,
+# so the path lives in the display pointer, not the override -- match with '*'.
+httrack-doc: extra-license-file *
+httrack-doc: package-contains-documentation-outside-usr-share-doc *

debian/libhttrack-dev.lintian-overrides

@@ -1,4 +1,7 @@
-libhttrack-dev: breakout-link *
-libhttrack-dev: hardening-no-fortify-functions usr/lib/x86_64-linux-gnu/httrack/libtest/*
-libhttrack-dev: package-contains-documentation-outside-usr-share-doc usr/share/httrack/libtest/readme.txt
+# The libtest example shared objects are unhardened test fixtures shipped for
+# the test harness, and their readme sits beside them under /usr/share/httrack.
+# Both are pointed hints with an empty match context, so match with '*'.
+libhttrack-dev: hardening-no-fortify-functions *
+libhttrack-dev: package-contains-documentation-outside-usr-share-doc *
+# config.h is installed as a public dev header; the package-name match is expected.
 libhttrack-dev: package-name-defined-in-config-h usr/include/httrack/config.h

debian/libhttrack2.lintian-overrides

@@ -1,2 +1,3 @@
+# The shared libraries ship without a versioned symbols control file (ABI is
+# tracked via the SONAME and a strict =version dependency, see debian/rules).
 libhttrack2: no-symbols-control-file usr/lib/*
-libhttrack2: spelling-error-in-binary usr/lib/*/libhttrack.so.* updat update

debian/webhttrack.files

@@ -4,3 +4,4 @@ usr/share/man/man1/webhttrack.1
 usr/share/man/man1/htsserver.1
 usr/share/applications/WebHTTrack-Websites.desktop
 usr/share/applications/WebHTTrack.desktop
+usr/share/metainfo/com.httrack.WebHTTrack.metainfo.xml

depcomp

@@ -1,791 +0,0 @@
-#! /bin/sh
-# depcomp - compile a program generating dependencies as side-effects
-
-scriptversion=2018-03-07.03; # UTC
-
-# Copyright (C) 1999-2021 Free Software Foundation, Inc.
-
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2, or (at your option)
-# any later version.
-
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-# As a special exception to the GNU General Public License, if you
-# distribute this file as part of a program that contains a
-# configuration script generated by Autoconf, you may include it under
-# the same distribution terms that you use for the rest of that program.
-
-# Originally written by Alexandre Oliva <oliva@dcc.unicamp.br>.
-
-case $1 in
-  '')
-    echo "$0: No command.  Try '$0 --help' for more information." 1>&2
-    exit 1;
-    ;;
-  -h | --h*)
-    cat <<\EOF
-Usage: depcomp [--help] [--version] PROGRAM [ARGS]
-
-Run PROGRAMS ARGS to compile a file, generating dependencies
-as side-effects.
-
-Environment variables:
-  depmode     Dependency tracking mode.
-  source      Source file read by 'PROGRAMS ARGS'.
-  object      Object file output by 'PROGRAMS ARGS'.
-  DEPDIR      directory where to store dependencies.
-  depfile     Dependency file to output.
-  tmpdepfile  Temporary file to use when outputting dependencies.
-  libtool     Whether libtool is used (yes/no).
-
-Report bugs to <bug-automake@gnu.org>.
-EOF
-    exit $?
-    ;;
-  -v | --v*)
-    echo "depcomp $scriptversion"
-    exit $?
-    ;;
-esac
-
-# Get the directory component of the given path, and save it in the
-# global variables '$dir'.  Note that this directory component will
-# be either empty or ending with a '/' character.  This is deliberate.
-set_dir_from ()
-{
-  case $1 in
-    */*) dir=`echo "$1" | sed -e 's|/[^/]*$|/|'`;;
-      *) dir=;;
-  esac
-}
-
-# Get the suffix-stripped basename of the given path, and save it the
-# global variable '$base'.
-set_base_from ()
-{
-  base=`echo "$1" | sed -e 's|^.*/||' -e 's/\.[^.]*$//'`
-}
-
-# If no dependency file was actually created by the compiler invocation,
-# we still have to create a dummy depfile, to avoid errors with the
-# Makefile "include basename.Plo" scheme.
-make_dummy_depfile ()
-{
-  echo "#dummy" > "$depfile"
-}
-
-# Factor out some common post-processing of the generated depfile.
-# Requires the auxiliary global variable '$tmpdepfile' to be set.
-aix_post_process_depfile ()
-{
-  # If the compiler actually managed to produce a dependency file,
-  # post-process it.
-  if test -f "$tmpdepfile"; then
-    # Each line is of the form 'foo.o: dependency.h'.
-    # Do two passes, one to just change these to
-    #   $object: dependency.h
-    # and one to simply output
-    #   dependency.h:
-    # which is needed to avoid the deleted-header problem.
-    { sed -e "s,^.*\.[$lower]*:,$object:," < "$tmpdepfile"
-      sed -e "s,^.*\.[$lower]*:[$tab ]*,," -e 's,$,:,' < "$tmpdepfile"
-    } > "$depfile"
-    rm -f "$tmpdepfile"
-  else
-    make_dummy_depfile
-  fi
-}
-
-# A tabulation character.
-tab='	'
-# A newline character.
-nl='
-'
-# Character ranges might be problematic outside the C locale.
-# These definitions help.
-upper=ABCDEFGHIJKLMNOPQRSTUVWXYZ
-lower=abcdefghijklmnopqrstuvwxyz
-digits=0123456789
-alpha=${upper}${lower}
-
-if test -z "$depmode" || test -z "$source" || test -z "$object"; then
-  echo "depcomp: Variables source, object and depmode must be set" 1>&2
-  exit 1
-fi
-
-# Dependencies for sub/bar.o or sub/bar.obj go into sub/.deps/bar.Po.
-depfile=${depfile-`echo "$object" |
-  sed 's|[^\\/]*$|'${DEPDIR-.deps}'/&|;s|\.\([^.]*\)$|.P\1|;s|Pobj$|Po|'`}
-tmpdepfile=${tmpdepfile-`echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'`}
-
-rm -f "$tmpdepfile"
-
-# Avoid interferences from the environment.
-gccflag= dashmflag=
-
-# Some modes work just like other modes, but use different flags.  We
-# parameterize here, but still list the modes in the big case below,
-# to make depend.m4 easier to write.  Note that we *cannot* use a case
-# here, because this file can only contain one case statement.
-if test "$depmode" = hp; then
-  # HP compiler uses -M and no extra arg.
-  gccflag=-M
-  depmode=gcc
-fi
-
-if test "$depmode" = dashXmstdout; then
-  # This is just like dashmstdout with a different argument.
-  dashmflag=-xM
-  depmode=dashmstdout
-fi
-
-cygpath_u="cygpath -u -f -"
-if test "$depmode" = msvcmsys; then
-  # This is just like msvisualcpp but w/o cygpath translation.
-  # Just convert the backslash-escaped backslashes to single forward
-  # slashes to satisfy depend.m4
-  cygpath_u='sed s,\\\\,/,g'
-  depmode=msvisualcpp
-fi
-
-if test "$depmode" = msvc7msys; then
-  # This is just like msvc7 but w/o cygpath translation.
-  # Just convert the backslash-escaped backslashes to single forward
-  # slashes to satisfy depend.m4
-  cygpath_u='sed s,\\\\,/,g'
-  depmode=msvc7
-fi
-
-if test "$depmode" = xlc; then
-  # IBM C/C++ Compilers xlc/xlC can output gcc-like dependency information.
-  gccflag=-qmakedep=gcc,-MF
-  depmode=gcc
-fi
-
-case "$depmode" in
-gcc3)
-## gcc 3 implements dependency tracking that does exactly what
-## we want.  Yay!  Note: for some reason libtool 1.4 doesn't like
-## it if -MD -MP comes after the -MF stuff.  Hmm.
-## Unfortunately, FreeBSD c89 acceptance of flags depends upon
-## the command line argument order; so add the flags where they
-## appear in depend2.am.  Note that the slowdown incurred here
-## affects only configure: in makefiles, %FASTDEP% shortcuts this.
-  for arg
-  do
-    case $arg in
-    -c) set fnord "$@" -MT "$object" -MD -MP -MF "$tmpdepfile" "$arg" ;;
-    *)  set fnord "$@" "$arg" ;;
-    esac
-    shift # fnord
-    shift # $arg
-  done
-  "$@"
-  stat=$?
-  if test $stat -ne 0; then
-    rm -f "$tmpdepfile"
-    exit $stat
-  fi
-  mv "$tmpdepfile" "$depfile"
-  ;;
-
-gcc)
-## Note that this doesn't just cater to obsosete pre-3.x GCC compilers.
-## but also to in-use compilers like IMB xlc/xlC and the HP C compiler.
-## (see the conditional assignment to $gccflag above).
-## There are various ways to get dependency output from gcc.  Here's
-## why we pick this rather obscure method:
-## - Don't want to use -MD because we'd like the dependencies to end
-##   up in a subdir.  Having to rename by hand is ugly.
-##   (We might end up doing this anyway to support other compilers.)
-## - The DEPENDENCIES_OUTPUT environment variable makes gcc act like
-##   -MM, not -M (despite what the docs say).  Also, it might not be
-##   supported by the other compilers which use the 'gcc' depmode.
-## - Using -M directly means running the compiler twice (even worse
-##   than renaming).
-  if test -z "$gccflag"; then
-    gccflag=-MD,
-  fi
-  "$@" -Wp,"$gccflag$tmpdepfile"
-  stat=$?
-  if test $stat -ne 0; then
-    rm -f "$tmpdepfile"
-    exit $stat
-  fi
-  rm -f "$depfile"
-  echo "$object : \\" > "$depfile"
-  # The second -e expression handles DOS-style file names with drive
-  # letters.
-  sed -e 's/^[^:]*: / /' \
-      -e 's/^['$alpha']:\/[^:]*: / /' < "$tmpdepfile" >> "$depfile"
-## This next piece of magic avoids the "deleted header file" problem.
-## The problem is that when a header file which appears in a .P file
-## is deleted, the dependency causes make to die (because there is
-## typically no way to rebuild the header).  We avoid this by adding
-## dummy dependencies for each header file.  Too bad gcc doesn't do
-## this for us directly.
-## Some versions of gcc put a space before the ':'.  On the theory
-## that the space means something, we add a space to the output as
-## well.  hp depmode also adds that space, but also prefixes the VPATH
-## to the object.  Take care to not repeat it in the output.
-## Some versions of the HPUX 10.20 sed can't process this invocation
-## correctly.  Breaking it into two sed invocations is a workaround.
-  tr ' ' "$nl" < "$tmpdepfile" \
-    | sed -e 's/^\\$//' -e '/^$/d' -e "s|.*$object$||" -e '/:$/d' \
-    | sed -e 's/$/ :/' >> "$depfile"
-  rm -f "$tmpdepfile"
-  ;;
-
-hp)
-  # This case exists only to let depend.m4 do its work.  It works by
-  # looking at the text of this script.  This case will never be run,
-  # since it is checked for above.
-  exit 1
-  ;;
-
-sgi)
-  if test "$libtool" = yes; then
-    "$@" "-Wp,-MDupdate,$tmpdepfile"
-  else
-    "$@" -MDupdate "$tmpdepfile"
-  fi
-  stat=$?
-  if test $stat -ne 0; then
-    rm -f "$tmpdepfile"
-    exit $stat
-  fi
-  rm -f "$depfile"
-
-  if test -f "$tmpdepfile"; then  # yes, the sourcefile depend on other files
-    echo "$object : \\" > "$depfile"
-    # Clip off the initial element (the dependent).  Don't try to be
-    # clever and replace this with sed code, as IRIX sed won't handle
-    # lines with more than a fixed number of characters (4096 in
-    # IRIX 6.2 sed, 8192 in IRIX 6.5).  We also remove comment lines;
-    # the IRIX cc adds comments like '#:fec' to the end of the
-    # dependency line.
-    tr ' ' "$nl" < "$tmpdepfile" \
-      | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' \
-      | tr "$nl" ' ' >> "$depfile"
-    echo >> "$depfile"
-    # The second pass generates a dummy entry for each header file.
-    tr ' ' "$nl" < "$tmpdepfile" \
-      | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \
-      >> "$depfile"
-  else
-    make_dummy_depfile
-  fi
-  rm -f "$tmpdepfile"
-  ;;
-
-xlc)
-  # This case exists only to let depend.m4 do its work.  It works by
-  # looking at the text of this script.  This case will never be run,
-  # since it is checked for above.
-  exit 1
-  ;;
-
-aix)
-  # The C for AIX Compiler uses -M and outputs the dependencies
-  # in a .u file.  In older versions, this file always lives in the
-  # current directory.  Also, the AIX compiler puts '$object:' at the
-  # start of each line; $object doesn't have directory information.
-  # Version 6 uses the directory in both cases.
-  set_dir_from "$object"
-  set_base_from "$object"
-  if test "$libtool" = yes; then
-    tmpdepfile1=$dir$base.u
-    tmpdepfile2=$base.u
-    tmpdepfile3=$dir.libs/$base.u
-    "$@" -Wc,-M
-  else
-    tmpdepfile1=$dir$base.u
-    tmpdepfile2=$dir$base.u
-    tmpdepfile3=$dir$base.u
-    "$@" -M
-  fi
-  stat=$?
-  if test $stat -ne 0; then
-    rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
-    exit $stat
-  fi
-
-  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
-  do
-    test -f "$tmpdepfile" && break
-  done
-  aix_post_process_depfile
-  ;;
-
-tcc)
-  # tcc (Tiny C Compiler) understand '-MD -MF file' since version 0.9.26
-  # FIXME: That version still under development at the moment of writing.
-  #        Make that this statement remains true also for stable, released
-  #        versions.
-  # It will wrap lines (doesn't matter whether long or short) with a
-  # trailing '\', as in:
-  #
-  #   foo.o : \
-  #    foo.c \
-  #    foo.h \
-  #
-  # It will put a trailing '\' even on the last line, and will use leading
-  # spaces rather than leading tabs (at least since its commit 0394caf7
-  # "Emit spaces for -MD").
-  "$@" -MD -MF "$tmpdepfile"
-  stat=$?
-  if test $stat -ne 0; then
-    rm -f "$tmpdepfile"
-    exit $stat
-  fi
-  rm -f "$depfile"
-  # Each non-empty line is of the form 'foo.o : \' or ' dep.h \'.
-  # We have to change lines of the first kind to '$object: \'.
-  sed -e "s|.*:|$object :|" < "$tmpdepfile" > "$depfile"
-  # And for each line of the second kind, we have to emit a 'dep.h:'
-  # dummy dependency, to avoid the deleted-header problem.
-  sed -n -e 's|^  *\(.*\) *\\$|\1:|p' < "$tmpdepfile" >> "$depfile"
-  rm -f "$tmpdepfile"
-  ;;
-
-## The order of this option in the case statement is important, since the
-## shell code in configure will try each of these formats in the order
-## listed in this file.  A plain '-MD' option would be understood by many
-## compilers, so we must ensure this comes after the gcc and icc options.
-pgcc)
-  # Portland's C compiler understands '-MD'.
-  # Will always output deps to 'file.d' where file is the root name of the
-  # source file under compilation, even if file resides in a subdirectory.
-  # The object file name does not affect the name of the '.d' file.
-  # pgcc 10.2 will output
-  #    foo.o: sub/foo.c sub/foo.h
-  # and will wrap long lines using '\' :
-  #    foo.o: sub/foo.c ... \
-  #     sub/foo.h ... \
-  #     ...
-  set_dir_from "$object"
-  # Use the source, not the object, to determine the base name, since
-  # that's sadly what pgcc will do too.
-  set_base_from "$source"
-  tmpdepfile=$base.d
-
-  # For projects that build the same source file twice into different object
-  # files, the pgcc approach of using the *source* file root name can cause
-  # problems in parallel builds.  Use a locking strategy to avoid stomping on
-  # the same $tmpdepfile.
-  lockdir=$base.d-lock
-  trap "
-    echo '$0: caught signal, cleaning up...' >&2
-    rmdir '$lockdir'
-    exit 1
-  " 1 2 13 15
-  numtries=100
-  i=$numtries
-  while test $i -gt 0; do
-    # mkdir is a portable test-and-set.
-    if mkdir "$lockdir" 2>/dev/null; then
-      # This process acquired the lock.
-      "$@" -MD
-      stat=$?
-      # Release the lock.
-      rmdir "$lockdir"
-      break
-    else
-      # If the lock is being held by a different process, wait
-      # until the winning process is done or we timeout.
-      while test -d "$lockdir" && test $i -gt 0; do
-        sleep 1
-        i=`expr $i - 1`
-      done
-    fi
-    i=`expr $i - 1`
-  done
-  trap - 1 2 13 15
-  if test $i -le 0; then
-    echo "$0: failed to acquire lock after $numtries attempts" >&2
-    echo "$0: check lockdir '$lockdir'" >&2
-    exit 1
-  fi
-
-  if test $stat -ne 0; then
-    rm -f "$tmpdepfile"
-    exit $stat
-  fi
-  rm -f "$depfile"
-  # Each line is of the form `foo.o: dependent.h',
-  # or `foo.o: dep1.h dep2.h \', or ` dep3.h dep4.h \'.
-  # Do two passes, one to just change these to
-  # `$object: dependent.h' and one to simply `dependent.h:'.
-  sed "s,^[^:]*:,$object :," < "$tmpdepfile" > "$depfile"
-  # Some versions of the HPUX 10.20 sed can't process this invocation
-  # correctly.  Breaking it into two sed invocations is a workaround.
-  sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" \
-    | sed -e 's/$/ :/' >> "$depfile"
-  rm -f "$tmpdepfile"
-  ;;
-
-hp2)
-  # The "hp" stanza above does not work with aCC (C++) and HP's ia64
-  # compilers, which have integrated preprocessors.  The correct option
-  # to use with these is +Maked; it writes dependencies to a file named
-  # 'foo.d', which lands next to the object file, wherever that
-  # happens to be.
-  # Much of this is similar to the tru64 case; see comments there.
-  set_dir_from  "$object"
-  set_base_from "$object"
-  if test "$libtool" = yes; then
-    tmpdepfile1=$dir$base.d
-    tmpdepfile2=$dir.libs/$base.d
-    "$@" -Wc,+Maked
-  else
-    tmpdepfile1=$dir$base.d
-    tmpdepfile2=$dir$base.d
-    "$@" +Maked
-  fi
-  stat=$?
-  if test $stat -ne 0; then
-     rm -f "$tmpdepfile1" "$tmpdepfile2"
-     exit $stat
-  fi
-
-  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2"
-  do
-    test -f "$tmpdepfile" && break
-  done
-  if test -f "$tmpdepfile"; then
-    sed -e "s,^.*\.[$lower]*:,$object:," "$tmpdepfile" > "$depfile"
-    # Add 'dependent.h:' lines.
-    sed -ne '2,${
-               s/^ *//
-               s/ \\*$//
-               s/$/:/
-               p
-             }' "$tmpdepfile" >> "$depfile"
-  else
-    make_dummy_depfile
-  fi
-  rm -f "$tmpdepfile" "$tmpdepfile2"
-  ;;
-
-tru64)
-  # The Tru64 compiler uses -MD to generate dependencies as a side
-  # effect.  'cc -MD -o foo.o ...' puts the dependencies into 'foo.o.d'.
-  # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put
-  # dependencies in 'foo.d' instead, so we check for that too.
-  # Subdirectories are respected.
-  set_dir_from  "$object"
-  set_base_from "$object"
-
-  if test "$libtool" = yes; then
-    # Libtool generates 2 separate objects for the 2 libraries.  These
-    # two compilations output dependencies in $dir.libs/$base.o.d and
-    # in $dir$base.o.d.  We have to check for both files, because
-    # one of the two compilations can be disabled.  We should prefer
-    # $dir$base.o.d over $dir.libs/$base.o.d because the latter is
-    # automatically cleaned when .libs/ is deleted, while ignoring
-    # the former would cause a distcleancheck panic.
-    tmpdepfile1=$dir$base.o.d          # libtool 1.5
-    tmpdepfile2=$dir.libs/$base.o.d    # Likewise.
-    tmpdepfile3=$dir.libs/$base.d      # Compaq CCC V6.2-504
-    "$@" -Wc,-MD
-  else
-    tmpdepfile1=$dir$base.d
-    tmpdepfile2=$dir$base.d
-    tmpdepfile3=$dir$base.d
-    "$@" -MD
-  fi
-
-  stat=$?
-  if test $stat -ne 0; then
-    rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
-    exit $stat
-  fi
-
-  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
-  do
-    test -f "$tmpdepfile" && break
-  done
-  # Same post-processing that is required for AIX mode.
-  aix_post_process_depfile
-  ;;
-
-msvc7)
-  if test "$libtool" = yes; then
-    showIncludes=-Wc,-showIncludes
-  else
-    showIncludes=-showIncludes
-  fi
-  "$@" $showIncludes > "$tmpdepfile"
-  stat=$?
-  grep -v '^Note: including file: ' "$tmpdepfile"
-  if test $stat -ne 0; then
-    rm -f "$tmpdepfile"
-    exit $stat
-  fi
-  rm -f "$depfile"
-  echo "$object : \\" > "$depfile"
-  # The first sed program below extracts the file names and escapes
-  # backslashes for cygpath.  The second sed program outputs the file
-  # name when reading, but also accumulates all include files in the
-  # hold buffer in order to output them again at the end.  This only
-  # works with sed implementations that can handle large buffers.
-  sed < "$tmpdepfile" -n '
-/^Note: including file:  *\(.*\)/ {
-  s//\1/
-  s/\\/\\\\/g
-  p
-}' | $cygpath_u | sort -u | sed -n '
-s/ /\\ /g
-s/\(.*\)/'"$tab"'\1 \\/p
-s/.\(.*\) \\/\1:/
-H
-$ {
-  s/.*/'"$tab"'/
-  G
-  p
-}' >> "$depfile"
-  echo >> "$depfile" # make sure the fragment doesn't end with a backslash
-  rm -f "$tmpdepfile"
-  ;;
-
-msvc7msys)
-  # This case exists only to let depend.m4 do its work.  It works by
-  # looking at the text of this script.  This case will never be run,
-  # since it is checked for above.
-  exit 1
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html/Makefile.am

@@ -12,28 +12,34 @@ WebIcon16x16dir = $(datadir)/icons/hicolor/16x16/apps
 WebIcon32x32dir = $(datadir)/icons/hicolor/32x32/apps
 WebIcon48x48dir = $(datadir)/icons/hicolor/48x48/apps
 VFolderEntrydir = $(prefix)/share/applications
+MetaInfodir = $(datadir)/metainfo
 
+# Wildcards are globbed against $(srcdir): a bare "*.html" is resolved against
+# the build dir and stays unexpanded (breaking "make") in an out-of-tree build.
+# Explicit filenames (e.g. ../history.txt, div/search.sh) resolve via VPATH and
+# need no prefix.
 HelpHtmlroot_DATA = ../httrack-doc.html ../history.txt
-HelpHtml_DATA = *.html
+HelpHtml_DATA = $(srcdir)/*.html
 HelpHtmldiv_DATA = div/search.sh
-HelpHtmlimg_DATA  = img/*
-HelpHtmlimages_DATA = images/*
+HelpHtmlimg_DATA  = $(srcdir)/img/*
+HelpHtmlimages_DATA = $(srcdir)/images/*
 HelpHtmlTxt_DATA = ../greetings.txt ../history.txt ../license.txt
-WebHtml_DATA = server/*.html server/*.js server/*.css
-WebHtmlimages_DATA = server/images/*
+WebHtml_DATA = $(srcdir)/server/*.html $(srcdir)/server/*.js $(srcdir)/server/*.css
+WebHtmlimages_DATA = $(srcdir)/server/images/*
 # note: converted & normalized by
 # ico2xpm favicon.ico -o httrack.xpm
 # mogrify -format xpm -map /usr/share/doc/menu/examples/cmap.xpm httrack.xpm
-WebPixmap_DATA = server/div/*.xpm
-WebIcon16x16_DATA = server/div/16x16/*.png
-WebIcon32x32_DATA = server/div/32x32/*.png
-WebIcon48x48_DATA = server/div/48x48/*.png
-VFolderEntry_DATA = server/div/*.desktop
+WebPixmap_DATA = $(srcdir)/server/div/*.xpm
+WebIcon16x16_DATA = $(srcdir)/server/div/16x16/*.png
+WebIcon32x32_DATA = $(srcdir)/server/div/32x32/*.png
+WebIcon48x48_DATA = $(srcdir)/server/div/48x48/*.png
+VFolderEntry_DATA = $(srcdir)/server/div/*.desktop
+MetaInfo_DATA = $(srcdir)/server/div/*.metainfo.xml
 
 EXTRA_DIST = $(HelpHtml_DATA) $(HelpHtmlimg_DATA) $(HelpHtmlimages_DATA) \
 	$(HelpHtmldiv_DATA) $(WebHtml_DATA) $(WebHtmlimages_DATA) \
 	$(WebPixmap_DATA) $(WebIcon16x16_DATA) $(WebIcon32x32_DATA) $(WebIcon48x48_DATA) \
-	$(VFolderEntry_DATA) \
+	$(VFolderEntry_DATA) $(MetaInfo_DATA) \
 	httrack.css
 
 install-data-hook:

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-# note: converted & normalized by
-# ico2xpm favicon.ico -o httrack.xpm
-# mogrify -format xpm -map /usr/share/doc/menu/examples/cmap.xpm httrack.xpm
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-
-pdf-am:
-
-ps: ps-am
-
-ps-am:
-
-uninstall-am: uninstall-HelpHtmlDATA uninstall-HelpHtmlTxtDATA \
-	uninstall-HelpHtmldivDATA uninstall-HelpHtmlimagesDATA \
-	uninstall-HelpHtmlimgDATA uninstall-HelpHtmlrootDATA \
-	uninstall-VFolderEntryDATA uninstall-WebHtmlDATA \
-	uninstall-WebHtmlimagesDATA uninstall-WebIcon16x16DATA \
-	uninstall-WebIcon32x32DATA uninstall-WebIcon48x48DATA \
-	uninstall-WebPixmapDATA
-
-.MAKE: install-am install-data-am install-strip
-
-.PHONY: all all-am check check-am clean clean-generic clean-libtool \
-	cscopelist-am ctags-am distclean distclean-generic \
-	distclean-libtool distdir dvi dvi-am html html-am info info-am \
-	install install-HelpHtmlDATA install-HelpHtmlTxtDATA \
-	install-HelpHtmldivDATA install-HelpHtmlimagesDATA \
-	install-HelpHtmlimgDATA install-HelpHtmlrootDATA \
-	install-VFolderEntryDATA install-WebHtmlDATA \
-	install-WebHtmlimagesDATA install-WebIcon16x16DATA \
-	install-WebIcon32x32DATA install-WebIcon48x48DATA \
-	install-WebPixmapDATA install-am install-data install-data-am \
-	install-data-hook install-dvi install-dvi-am install-exec \
-	install-exec-am install-html install-html-am install-info \
-	install-info-am install-man install-pdf install-pdf-am \
-	install-ps install-ps-am install-strip installcheck \
-	installcheck-am installdirs maintainer-clean \
-	maintainer-clean-generic mostlyclean mostlyclean-generic \
-	mostlyclean-libtool pdf pdf-am ps ps-am tags-am uninstall \
-	uninstall-HelpHtmlDATA uninstall-HelpHtmlTxtDATA \
-	uninstall-HelpHtmldivDATA uninstall-HelpHtmlimagesDATA \
-	uninstall-HelpHtmlimgDATA uninstall-HelpHtmlrootDATA \
-	uninstall-VFolderEntryDATA uninstall-WebHtmlDATA \
-	uninstall-WebHtmlimagesDATA uninstall-WebIcon16x16DATA \
-	uninstall-WebIcon32x32DATA uninstall-WebIcon48x48DATA \
-	uninstall-WebPixmapDATA uninstall-am
-
-.PRECIOUS: Makefile
-
-
-install-data-hook:
-	if test ! -L $(DESTDIR)$(prefix)/share/httrack/html ; then \
-		( cd $(DESTDIR)$(prefix)/share/httrack \
-			&& $(LN_S) $(htmldir) html \
-		) \
-	fi
-
-# Tell versions [3.59,3.63) of GNU make to not export all variables.
-# Otherwise a system limit (for SysV at least) may be exceeded.
-.NOEXPORT:

html/server/div/WebHTTrack-Websites.desktop

@@ -8,3 +8,6 @@ Comment=Browse Websites Mirrored by WebHTTrack
 Keywords=browse mirrored;
 Exec=webhttrack browse
 Icon=httrack
+# Helper launcher for WebHTTrack's browse mode, not a standalone app: keep it
+# out of software-center catalogs so it doesn't duplicate the main entry.
+X-AppStream-Ignore=true

html/server/div/com.httrack.WebHTTrack.metainfo.xml

@@ -0,0 +1,55 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Copyright 2026 Xavier Roche <roche@httrack.com> -->
+<component type="desktop-application">
+  <id>com.httrack.WebHTTrack</id>
+  <metadata_license>FSFAP</metadata_license>
+  <project_license>GPL-3.0-or-later</project_license>
+  <name>WebHTTrack Website Copier</name>
+  <summary>Copy websites to your computer for offline browsing</summary>
+  <description>
+    <p>
+      WebHTTrack is the web interface to HTTrack, an offline browser utility.
+      It downloads a website from the Internet to a local directory, fetching
+      the HTML, images, and other files and rebuilding the site's link
+      structure so you can browse it offline.
+    </p>
+    <p>
+      A step-by-step web interface guides you through choosing the addresses
+      to mirror and the options to apply. Mirrors can be updated in place and
+      interrupted downloads resumed.
+    </p>
+    <p>Typical uses include:</p>
+    <ul>
+      <li>Keeping an offline copy of a website for reading without a connection</li>
+      <li>Archiving or preserving sites and capturing them for later reference</li>
+      <li>Updating an existing local mirror without downloading it again</li>
+    </ul>
+  </description>
+  <launchable type="desktop-id">WebHTTrack.desktop</launchable>
+  <icon type="stock">httrack</icon>
+  <categories>
+    <category>Network</category>
+  </categories>
+  <keywords>
+    <keyword>offline browser</keyword>
+    <keyword>website copier</keyword>
+    <keyword>mirror</keyword>
+    <keyword>crawl</keyword>
+    <keyword>archiving</keyword>
+  </keywords>
+  <url type="homepage">https://www.httrack.com/</url>
+  <url type="bugtracker">https://github.com/xroche/httrack/issues</url>
+  <developer id="com.httrack">
+    <name>Xavier Roche</name>
+  </developer>
+  <screenshots>
+    <screenshot type="default">
+      <caption>Choosing the addresses and options for a new mirror</caption>
+      <image>https://www.httrack.com/html/images/screenshot_01b.jpg</image>
+    </screenshot>
+  </screenshots>
+  <content_rating type="oars-1.1"/>
+  <releases>
+    <release version="3.49.8" date="2026-06-07"/>
+  </releases>
+</component>

install-sh

@@ -1,541 +0,0 @@
-#!/bin/sh
-# install - install a program, script, or datafile
-
-scriptversion=2020-11-14.01; # UTC
-
-# This originates from X11R5 (mit/util/scripts/install.sh), which was
-# later released in X11R6 (xc/config/util/install.sh) with the
-# following copyright and license.
-#
-# Copyright (C) 1994 X Consortium
-#
-# Permission is hereby granted, free of charge, to any person obtaining a copy
-# of this software and associated documentation files (the "Software"), to
-# deal in the Software without restriction, including without limitation the
-# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
-# sell copies of the Software, and to permit persons to whom the Software is
-# furnished to do so, subject to the following conditions:
-#
-# The above copyright notice and this permission notice shall be included in
-# all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
-# X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
-# AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNEC-
-# TION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-#
-# Except as contained in this notice, the name of the X Consortium shall not
-# be used in advertising or otherwise to promote the sale, use or other deal-
-# ings in this Software without prior written authorization from the X Consor-
-# tium.
-#
-#
-# FSF changes to this file are in the public domain.
-#
-# Calling this script install-sh is preferred over install.sh, to prevent
-# 'make' implicit rules from creating a file called install from it
-# when there is no Makefile.
-#
-# This script is compatible with the BSD install script, but was written
-# from scratch.
-
-tab='	'
-nl='
-'
-IFS=" $tab$nl"
-
-# Set DOITPROG to "echo" to test this script.
-
-doit=${DOITPROG-}
-doit_exec=${doit:-exec}
-
-# Put in absolute file names if you don't have them in your path;
-# or use environment vars.
-
-chgrpprog=${CHGRPPROG-chgrp}
-chmodprog=${CHMODPROG-chmod}
-chownprog=${CHOWNPROG-chown}
-cmpprog=${CMPPROG-cmp}
-cpprog=${CPPROG-cp}
-mkdirprog=${MKDIRPROG-mkdir}
-mvprog=${MVPROG-mv}
-rmprog=${RMPROG-rm}
-stripprog=${STRIPPROG-strip}
-
-posix_mkdir=
-
-# Desired mode of installed file.
-mode=0755
-
-# Create dirs (including intermediate dirs) using mode 755.
-# This is like GNU 'install' as of coreutils 8.32 (2020).
-mkdir_umask=22
-
-backupsuffix=
-chgrpcmd=
-chmodcmd=$chmodprog
-chowncmd=
-mvcmd=$mvprog
-rmcmd="$rmprog -f"
-stripcmd=
-
-src=
-dst=
-dir_arg=
-dst_arg=
-
-copy_on_change=false
-is_target_a_directory=possibly
-
-usage="\
-Usage: $0 [OPTION]... [-T] SRCFILE DSTFILE
-   or: $0 [OPTION]... SRCFILES... DIRECTORY
-   or: $0 [OPTION]... -t DIRECTORY SRCFILES...
-   or: $0 [OPTION]... -d DIRECTORIES...
-
-In the 1st form, copy SRCFILE to DSTFILE.
-In the 2nd and 3rd, copy all SRCFILES to DIRECTORY.
-In the 4th, create DIRECTORIES.
-
-Options:
-     --help     display this help and exit.
-     --version  display version info and exit.
-
-  -c            (ignored)
-  -C            install only if different (preserve data modification time)
-  -d            create directories instead of installing files.
-  -g GROUP      $chgrpprog installed files to GROUP.
-  -m MODE       $chmodprog installed files to MODE.
-  -o USER       $chownprog installed files to USER.
-  -p            pass -p to $cpprog.
-  -s            $stripprog installed files.
-  -S SUFFIX     attempt to back up existing files, with suffix SUFFIX.
-  -t DIRECTORY  install into DIRECTORY.
-  -T            report an error if DSTFILE is a directory.
-
-Environment variables override the default commands:
-  CHGRPPROG CHMODPROG CHOWNPROG CMPPROG CPPROG MKDIRPROG MVPROG
-  RMPROG STRIPPROG
-
-By default, rm is invoked with -f; when overridden with RMPROG,
-it's up to you to specify -f if you want it.
-
-If -S is not specified, no backups are attempted.
-
-Email bug reports to bug-automake@gnu.org.
-Automake home page: https://www.gnu.org/software/automake/
-"
-
-while test $# -ne 0; do
-  case $1 in
-    -c) ;;
-
-    -C) copy_on_change=true;;
-
-    -d) dir_arg=true;;
-
-    -g) chgrpcmd="$chgrpprog $2"
-        shift;;
-
-    --help) echo "$usage"; exit $?;;
-
-    -m) mode=$2
-        case $mode in
-          *' '* | *"$tab"* | *"$nl"* | *'*'* | *'?'* | *'['*)
-            echo "$0: invalid mode: $mode" >&2
-            exit 1;;
-        esac
-        shift;;
-
-    -o) chowncmd="$chownprog $2"
-        shift;;
-
-    -p) cpprog="$cpprog -p";;
-
-    -s) stripcmd=$stripprog;;
-
-    -S) backupsuffix="$2"
-        shift;;
-
-    -t)
-        is_target_a_directory=always
-        dst_arg=$2
-        # Protect names problematic for 'test' and other utilities.
-        case $dst_arg in
-          -* | [=\(\)!]) dst_arg=./$dst_arg;;
-        esac
-        shift;;
-
-    -T) is_target_a_directory=never;;
-
-    --version) echo "$0 $scriptversion"; exit $?;;
-
-    --) shift
-        break;;
-
-    -*) echo "$0: invalid option: $1" >&2
-        exit 1;;
-
-    *)  break;;
-  esac
-  shift
-done
-
-# We allow the use of options -d and -T together, by making -d
-# take the precedence; this is for compatibility with GNU install.
-
-if test -n "$dir_arg"; then
-  if test -n "$dst_arg"; then
-    echo "$0: target directory not allowed when installing a directory." >&2
-    exit 1
-  fi
-fi
-
-if test $# -ne 0 && test -z "$dir_arg$dst_arg"; then
-  # When -d is used, all remaining arguments are directories to create.
-  # When -t is used, the destination is already specified.
-  # Otherwise, the last argument is the destination.  Remove it from $@.
-  for arg
-  do
-    if test -n "$dst_arg"; then
-      # $@ is not empty: it contains at least $arg.
-      set fnord "$@" "$dst_arg"
-      shift # fnord
-    fi
-    shift # arg
-    dst_arg=$arg
-    # Protect names problematic for 'test' and other utilities.
-    case $dst_arg in
-      -* | [=\(\)!]) dst_arg=./$dst_arg;;
-    esac
-  done
-fi
-
-if test $# -eq 0; then
-  if test -z "$dir_arg"; then
-    echo "$0: no input file specified." >&2
-    exit 1
-  fi
-  # It's OK to call 'install-sh -d' without argument.
-  # This can happen when creating conditional directories.
-  exit 0
-fi
-
-if test -z "$dir_arg"; then
-  if test $# -gt 1 || test "$is_target_a_directory" = always; then
-    if test ! -d "$dst_arg"; then
-      echo "$0: $dst_arg: Is not a directory." >&2
-      exit 1
-    fi
-  fi
-fi
-
-if test -z "$dir_arg"; then
-  do_exit='(exit $ret); exit $ret'
-  trap "ret=129; $do_exit" 1
-  trap "ret=130; $do_exit" 2
-  trap "ret=141; $do_exit" 13
-  trap "ret=143; $do_exit" 15
-
-  # Set umask so as not to create temps with too-generous modes.
-  # However, 'strip' requires both read and write access to temps.
-  case $mode in
-    # Optimize common cases.
-    *644) cp_umask=133;;
-    *755) cp_umask=22;;
-
-    *[0-7])
-      if test -z "$stripcmd"; then
-        u_plus_rw=
-      else
-        u_plus_rw='% 200'
-      fi
-      cp_umask=`expr '(' 777 - $mode % 1000 ')' $u_plus_rw`;;
-    *)
-      if test -z "$stripcmd"; then
-        u_plus_rw=
-      else
-        u_plus_rw=,u+rw
-      fi
-      cp_umask=$mode$u_plus_rw;;
-  esac
-fi
-
-for src
-do
-  # Protect names problematic for 'test' and other utilities.
-  case $src in
-    -* | [=\(\)!]) src=./$src;;
-  esac
-
-  if test -n "$dir_arg"; then
-    dst=$src
-    dstdir=$dst
-    test -d "$dstdir"
-    dstdir_status=$?
-    # Don't chown directories that already exist.
-    if test $dstdir_status = 0; then
-      chowncmd=""
-    fi
-  else
-
-    # Waiting for this to be detected by the "$cpprog $src $dsttmp" command
-    # might cause directories to be created, which would be especially bad
-    # if $src (and thus $dsttmp) contains '*'.
-    if test ! -f "$src" && test ! -d "$src"; then
-      echo "$0: $src does not exist." >&2
-      exit 1
-    fi
-
-    if test -z "$dst_arg"; then
-      echo "$0: no destination specified." >&2
-      exit 1
-    fi
-    dst=$dst_arg
-
-    # If destination is a directory, append the input filename.
-    if test -d "$dst"; then
-      if test "$is_target_a_directory" = never; then
-        echo "$0: $dst_arg: Is a directory" >&2
-        exit 1
-      fi
-      dstdir=$dst
-      dstbase=`basename "$src"`
-      case $dst in
-	*/) dst=$dst$dstbase;;
-	*)  dst=$dst/$dstbase;;
-      esac
-      dstdir_status=0
-    else
-      dstdir=`dirname "$dst"`
-      test -d "$dstdir"
-      dstdir_status=$?
-    fi
-  fi
-
-  case $dstdir in
-    */) dstdirslash=$dstdir;;
-    *)  dstdirslash=$dstdir/;;
-  esac
-
-  obsolete_mkdir_used=false
-
-  if test $dstdir_status != 0; then
-    case $posix_mkdir in
-      '')
-        # With -d, create the new directory with the user-specified mode.
-        # Otherwise, rely on $mkdir_umask.
-        if test -n "$dir_arg"; then
-          mkdir_mode=-m$mode
-        else
-          mkdir_mode=
-        fi
-
-        posix_mkdir=false
-	# The $RANDOM variable is not portable (e.g., dash).  Use it
-	# here however when possible just to lower collision chance.
-	tmpdir=${TMPDIR-/tmp}/ins$RANDOM-$$
-
-	trap '
-	  ret=$?
-	  rmdir "$tmpdir/a/b" "$tmpdir/a" "$tmpdir" 2>/dev/null
-	  exit $ret
-	' 0
-
-	# Because "mkdir -p" follows existing symlinks and we likely work
-	# directly in world-writeable /tmp, make sure that the '$tmpdir'
-	# directory is successfully created first before we actually test
-	# 'mkdir -p'.
-	if (umask $mkdir_umask &&
-	    $mkdirprog $mkdir_mode "$tmpdir" &&
-	    exec $mkdirprog $mkdir_mode -p -- "$tmpdir/a/b") >/dev/null 2>&1
-	then
-	  if test -z "$dir_arg" || {
-	       # Check for POSIX incompatibilities with -m.
-	       # HP-UX 11.23 and IRIX 6.5 mkdir -m -p sets group- or
-	       # other-writable bit of parent directory when it shouldn't.
-	       # FreeBSD 6.1 mkdir -m -p sets mode of existing directory.
-	       test_tmpdir="$tmpdir/a"
-	       ls_ld_tmpdir=`ls -ld "$test_tmpdir"`
-	       case $ls_ld_tmpdir in
-		 d????-?r-*) different_mode=700;;
-		 d????-?--*) different_mode=755;;
-		 *) false;;
-	       esac &&
-	       $mkdirprog -m$different_mode -p -- "$test_tmpdir" && {
-		 ls_ld_tmpdir_1=`ls -ld "$test_tmpdir"`
-		 test "$ls_ld_tmpdir" = "$ls_ld_tmpdir_1"
-	       }
-	     }
-	  then posix_mkdir=:
-	  fi
-	  rmdir "$tmpdir/a/b" "$tmpdir/a" "$tmpdir"
-	else
-	  # Remove any dirs left behind by ancient mkdir implementations.
-	  rmdir ./$mkdir_mode ./-p ./-- "$tmpdir" 2>/dev/null
-	fi
-	trap '' 0;;
-    esac
-
-    if
-      $posix_mkdir && (
-        umask $mkdir_umask &&
-        $doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir"
-      )
-    then :
-    else
-
-      # mkdir does not conform to POSIX,
-      # or it failed possibly due to a race condition.  Create the
-      # directory the slow way, step by step, checking for races as we go.
-
-      case $dstdir in
-        /*) prefix='/';;
-        [-=\(\)!]*) prefix='./';;
-        *)  prefix='';;
-      esac
-
-      oIFS=$IFS
-      IFS=/
-      set -f
-      set fnord $dstdir
-      shift
-      set +f
-      IFS=$oIFS
-
-      prefixes=
-
-      for d
-      do
-        test X"$d" = X && continue
-
-        prefix=$prefix$d
-        if test -d "$prefix"; then
-          prefixes=
-        else
-          if $posix_mkdir; then
-            (umask $mkdir_umask &&
-             $doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir") && break
-            # Don't fail if two instances are running concurrently.
-            test -d "$prefix" || exit 1
-          else
-            case $prefix in
-              *\'*) qprefix=`echo "$prefix" | sed "s/'/'\\\\\\\\''/g"`;;
-              *) qprefix=$prefix;;
-            esac
-            prefixes="$prefixes '$qprefix'"
-          fi
-        fi
-        prefix=$prefix/
-      done
-
-      if test -n "$prefixes"; then
-        # Don't fail if two instances are running concurrently.
-        (umask $mkdir_umask &&
-         eval "\$doit_exec \$mkdirprog $prefixes") ||
-          test -d "$dstdir" || exit 1
-        obsolete_mkdir_used=true
-      fi
-    fi
-  fi
-
-  if test -n "$dir_arg"; then
-    { test -z "$chowncmd" || $doit $chowncmd "$dst"; } &&
-    { test -z "$chgrpcmd" || $doit $chgrpcmd "$dst"; } &&
-    { test "$obsolete_mkdir_used$chowncmd$chgrpcmd" = false ||
-      test -z "$chmodcmd" || $doit $chmodcmd $mode "$dst"; } || exit 1
-  else
-
-    # Make a couple of temp file names in the proper directory.
-    dsttmp=${dstdirslash}_inst.$$_
-    rmtmp=${dstdirslash}_rm.$$_
-
-    # Trap to clean up those temp files at exit.
-    trap 'ret=$?; rm -f "$dsttmp" "$rmtmp" && exit $ret' 0
-
-    # Copy the file name to the temp name.
-    (umask $cp_umask &&
-     { test -z "$stripcmd" || {
-	 # Create $dsttmp read-write so that cp doesn't create it read-only,
-	 # which would cause strip to fail.
-	 if test -z "$doit"; then
-	   : >"$dsttmp" # No need to fork-exec 'touch'.
-	 else
-	   $doit touch "$dsttmp"
-	 fi
-       }
-     } &&
-     $doit_exec $cpprog "$src" "$dsttmp") &&
-
-    # and set any options; do chmod last to preserve setuid bits.
-    #
-    # If any of these fail, we abort the whole thing.  If we want to
-    # ignore errors from any of these, just make sure not to ignore
-    # errors from the above "$doit $cpprog $src $dsttmp" command.
-    #
-    { test -z "$chowncmd" || $doit $chowncmd "$dsttmp"; } &&
-    { test -z "$chgrpcmd" || $doit $chgrpcmd "$dsttmp"; } &&
-    { test -z "$stripcmd" || $doit $stripcmd "$dsttmp"; } &&
-    { test -z "$chmodcmd" || $doit $chmodcmd $mode "$dsttmp"; } &&
-
-    # If -C, don't bother to copy if it wouldn't change the file.
-    if $copy_on_change &&
-       old=`LC_ALL=C ls -dlL "$dst"     2>/dev/null` &&
-       new=`LC_ALL=C ls -dlL "$dsttmp"  2>/dev/null` &&
-       set -f &&
-       set X $old && old=:$2:$4:$5:$6 &&
-       set X $new && new=:$2:$4:$5:$6 &&
-       set +f &&
-       test "$old" = "$new" &&
-       $cmpprog "$dst" "$dsttmp" >/dev/null 2>&1
-    then
-      rm -f "$dsttmp"
-    else
-      # If $backupsuffix is set, and the file being installed
-      # already exists, attempt a backup.  Don't worry if it fails,
-      # e.g., if mv doesn't support -f.
-      if test -n "$backupsuffix" && test -f "$dst"; then
-        $doit $mvcmd -f "$dst" "$dst$backupsuffix" 2>/dev/null
-      fi
-
-      # Rename the file to the real destination.
-      $doit $mvcmd -f "$dsttmp" "$dst" 2>/dev/null ||
-
-      # The rename failed, perhaps because mv can't rename something else
-      # to itself, or perhaps because mv is so ancient that it does not
-      # support -f.
-      {
-        # Now remove or move aside any old file at destination location.
-        # We try this two ways since rm can't unlink itself on some
-        # systems and the destination file might be busy for other
-        # reasons.  In this case, the final cleanup might fail but the new
-        # file should still install successfully.
-        {
-          test ! -f "$dst" ||
-          $doit $rmcmd "$dst" 2>/dev/null ||
-          { $doit $mvcmd -f "$dst" "$rmtmp" 2>/dev/null &&
-            { $doit $rmcmd "$rmtmp" 2>/dev/null; :; }
-          } ||
-          { echo "$0: cannot unlink or rename $dst" >&2
-            (exit 1); exit 1
-          }
-        } &&
-
-        # Now rename the file to the real destination.
-        $doit $mvcmd "$dsttmp" "$dst"
-      }
-    fi || exit 1
-
-    trap '' 0
-  fi
-done
-
-# Local variables:
-# eval: (add-hook 'before-save-hook 'time-stamp)
-# time-stamp-start: "scriptversion="
-# time-stamp-format: "%:y-%02m-%02d.%02H"
-# time-stamp-time-zone: "UTC0"
-# time-stamp-end: "; # UTC"
-# End:

lang/Makefile.am

@@ -1,6 +1,8 @@
 
 langdir = $(datadir)/httrack/lang
-lang_DATA = *.txt
+# Glob against $(srcdir): a bare "*.txt" is resolved against the build dir and
+# stays unexpanded (breaking "make") in an out-of-tree build.
+lang_DATA = $(srcdir)/*.txt
 langrootdir = $(datadir)/httrack
 langroot_DATA = ../lang.def ../lang.indexes
 

lang/Makefile.in

@@ -1,545 +0,0 @@
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libtest/Makefile.am

@@ -1,6 +1,8 @@
 
 exemplesdir = $(datadir)/httrack/libtest
-exemples_DATA = *.c *.h *.txt
+# Glob against $(srcdir), not the build dir: a bare "*.c" is resolved relative to
+# the build dir and stays unexpanded (breaking "make") in an out-of-tree build.
+exemples_DATA = $(srcdir)/*.c $(srcdir)/*.h $(srcdir)/*.txt
 EXTRA_DIST = $(exemples_DATA) libtest.mak libtest.vcproj
 
 AM_CPPFLAGS = \
@@ -12,15 +14,18 @@ AM_CPPFLAGS = \
 	-DSYSCONFDIR=\""$(sysconfdir)"\" \
 	-DDATADIR=\""$(datadir)"\" \
 	-DLIBDIR=\""$(libdir)"\"
-AM_CPPFLAGS += -I../src
+# Use $(top_srcdir)/src, not ../src: the latter is relative to the build dir and
+# misses the source headers (e.g. httrack-library.h) in an out-of-tree build.
+AM_CPPFLAGS += -I$(top_srcdir)/src
 
 # The callback examples reference libc only through libhttrack, so the direct
 # libc edge gets dropped from DT_NEEDED (library-not-linked-against-libc).
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+# Force libc back; configure gates the flag since only a GNU-style linker
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+	@LIBC_FORCE_LINK@
 
 # Examples
 libbaselinks_la_SOURCES =  callbacks-example-baselinks.c

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-.PHONY: regen-man-html
-
-# Tell versions [3.59,3.63) of GNU make to not export all variables.
-# Otherwise a system limit (for SysV at least) may be exceeded.
-.NOEXPORT:

man/htsserver.1

@@ -1,6 +1,7 @@
 .\" Process this file with
 .\" groff -man -Tascii htsserver.1
 .\"
+.\" SPDX-License-Identifier: GPL-3.0-or-later
 .TH htsserver 1 "Mar 2003" "httrack website copier"
 .SH NAME
 htsserver \- offline browser server : copy websites to a local directory
@@ -35,7 +36,7 @@ Please reports bugs to
 .B <bugs@httrack.com>.
 Include a complete, self-contained example that will allow the bug to be reproduced, and say which version of (web)httrack you are using. Do not forget to detail options used, OS version, and any other information you deem necessary.
 .SH COPYRIGHT
-Copyright (C) 1998-2013 Xavier Roche and other contributors
+Copyright (C) 1998-2026 Xavier Roche and other contributors
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by

man/httrack.1

@@ -2,6 +2,7 @@
 .\" groff -man -Tascii httrack.1
 .\"
 .\" This file is generated by man/makeman.sh; do not edit by hand.
+.\" SPDX-License-Identifier: GPL-3.0-or-later
 .TH httrack 1 "13 June 2026" "httrack website copier"
 .SH NAME
 httrack \- offline browser : copy websites to a local directory

man/makeman.sh

@@ -110,6 +110,7 @@ cat <<'EOF'
 .\" groff -man -Tascii httrack.1
 .\"
 .\" This file is generated by man/makeman.sh; do not edit by hand.
+.\" SPDX-License-Identifier: GPL-3.0-or-later
 EOF
 printf '.TH httrack 1 "%s" "httrack website copier"\n' "$date_str"
 cat <<'EOF'

man/proxytrack.1

@@ -1,6 +1,7 @@
 .\" Process this file with
 .\" groff -man -Tascii proxytrack.1
 .\"
+.\" SPDX-License-Identifier: GPL-3.0-or-later
 .TH proxytrack 1 "Mar 2003" "httrack website copier"
 .SH NAME
 proxytrack \- proxy to serve content archived by httrack website copier
@@ -25,7 +26,7 @@ Please reports bugs to
 .B <bugs@httrack.com>.
 Include a complete, self-contained example that will allow the bug to be reproduced, and say which version of (web)httrack you are using. Do not forget to detail options used, OS version, and any other information you deem necessary.
 .SH COPYRIGHT
-Copyright (C) 1998-2013 Xavier Roche and other contributors
+Copyright (C) 1998-2026 Xavier Roche and other contributors
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by

man/webhttrack.1

@@ -1,6 +1,7 @@
 .\" Process this file with
 .\" groff -man -Tascii webhttrack.1
 .\"
+.\" SPDX-License-Identifier: GPL-3.0-or-later
 .TH webhttrack 1 "Mar 2003" "httrack website copier"
 .SH NAME
 webhttrack \- offline browser : copy websites to a local directory
@@ -36,7 +37,7 @@ Please reports bugs to
 .B <bugs@httrack.com>.
 Include a complete, self-contained example that will allow the bug to be reproduced, and say which version of (web)httrack you are using. Do not forget to detail options used, OS version, and any other information you deem necessary.
 .SH COPYRIGHT
-Copyright (C) 1998-2013 Xavier Roche and other contributors
+Copyright (C) 1998-2026 Xavier Roche and other contributors
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by

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-  bison     yacc      flex         lex       help2man
-
-Version suffixes to PROGRAM as well as the prefixes 'gnu-', 'gnu', and
-'g' are ignored when checking the name.
-
-Send bug reports to <bug-automake@gnu.org>."
-    exit $?
-    ;;
-
-  -v|--v|--ve|--ver|--vers|--versi|--versio|--version)
-    echo "missing $scriptversion (GNU Automake)"
-    exit $?
-    ;;
-
-  -*)
-    echo 1>&2 "$0: unknown '$1' option"
-    echo 1>&2 "Try '$0 --help' for more information"
-    exit 1
-    ;;
-
-esac
-
-# Run the given program, remember its exit status.
-"$@"; st=$?
-
-# If it succeeded, we are done.
-test $st -eq 0 && exit 0
-
-# Also exit now if we it failed (or wasn't found), and '--version' was
-# passed; such an option is passed most likely to detect whether the
-# program is present and works.
-case $2 in --version|--help) exit $st;; esac
-
-# Exit code 63 means version mismatch.  This often happens when the user
-# tries to use an ancient version of a tool on a file that requires a
-# minimum version.
-if test $st -eq 63; then
-  msg="probably too old"
-elif test $st -eq 127; then
-  # Program was missing.
-  msg="missing on your system"
-else
-  # Program was found and executed, but failed.  Give up.
-  exit $st
-fi
-
-perl_URL=https://www.perl.org/
-flex_URL=https://github.com/westes/flex
-gnu_software_URL=https://www.gnu.org/software
-
-program_details ()
-{
-  case $1 in
-    aclocal|automake)
-      echo "The '$1' program is part of the GNU Automake package:"
-      echo "<$gnu_software_URL/automake>"
-      echo "It also requires GNU Autoconf, GNU m4 and Perl in order to run:"
-      echo "<$gnu_software_URL/autoconf>"
-      echo "<$gnu_software_URL/m4/>"
-      echo "<$perl_URL>"
-      ;;
-    autoconf|autom4te|autoheader)
-      echo "The '$1' program is part of the GNU Autoconf package:"
-      echo "<$gnu_software_URL/autoconf/>"
-      echo "It also requires GNU m4 and Perl in order to run:"
-      echo "<$gnu_software_URL/m4/>"
-      echo "<$perl_URL>"
-      ;;
-  esac
-}
-
-give_advice ()
-{
-  # Normalize program name to check for.
-  normalized_program=`echo "$1" | sed '
-    s/^gnu-//; t
-    s/^gnu//; t
-    s/^g//; t'`
-
-  printf '%s\n' "'$1' is $msg."
-
-  configure_deps="'configure.ac' or m4 files included by 'configure.ac'"
-  case $normalized_program in
-    autoconf*)
-      echo "You should only need it if you modified 'configure.ac',"
-      echo "or m4 files included by it."
-      program_details 'autoconf'
-      ;;
-    autoheader*)
-      echo "You should only need it if you modified 'acconfig.h' or"
-      echo "$configure_deps."
-      program_details 'autoheader'
-      ;;
-    automake*)
-      echo "You should only need it if you modified 'Makefile.am' or"
-      echo "$configure_deps."
-      program_details 'automake'
-      ;;
-    aclocal*)
-      echo "You should only need it if you modified 'acinclude.m4' or"
-      echo "$configure_deps."
-      program_details 'aclocal'
-      ;;
-   autom4te*)
-      echo "You might have modified some maintainer files that require"
-      echo "the 'autom4te' program to be rebuilt."
-      program_details 'autom4te'
-      ;;
-    bison*|yacc*)
-      echo "You should only need it if you modified a '.y' file."
-      echo "You may want to install the GNU Bison package:"
-      echo "<$gnu_software_URL/bison/>"
-      ;;
-    lex*|flex*)
-      echo "You should only need it if you modified a '.l' file."
-      echo "You may want to install the Fast Lexical Analyzer package:"
-      echo "<$flex_URL>"
-      ;;
-    help2man*)
-      echo "You should only need it if you modified a dependency" \
-           "of a man page."
-      echo "You may want to install the GNU Help2man package:"
-      echo "<$gnu_software_URL/help2man/>"
-    ;;
-    makeinfo*)
-      echo "You should only need it if you modified a '.texi' file, or"
-      echo "any other file indirectly affecting the aspect of the manual."
-      echo "You might want to install the Texinfo package:"
-      echo "<$gnu_software_URL/texinfo/>"
-      echo "The spurious makeinfo call might also be the consequence of"
-      echo "using a buggy 'make' (AIX, DU, IRIX), in which case you might"
-      echo "want to install GNU make:"
-      echo "<$gnu_software_URL/make/>"
-      ;;
-    *)
-      echo "You might have modified some files without having the proper"
-      echo "tools for further handling them.  Check the 'README' file, it"
-      echo "often tells you about the needed prerequisites for installing"
-      echo "this package.  You may also peek at any GNU archive site, in"
-      echo "case some other package contains this missing '$1' program."
-      ;;
-  esac
-}
-
-give_advice "$1" | sed -e '1s/^/WARNING: /' \
-                       -e '2,$s/^/         /' >&2
-
-# Propagate the correct exit status (expected to be 127 for a program
-# not found, 63 for a program that failed due to version mismatch).
-exit $st
-
-# Local variables:
-# eval: (add-hook 'before-save-hook 'time-stamp)
-# time-stamp-start: "scriptversion="
-# time-stamp-format: "%:y-%02m-%02d.%02H"
-# time-stamp-time-zone: "UTC0"
-# time-stamp-end: "; # UTC"
-# End:

src/Makefile.am

@@ -56,6 +56,7 @@ whttrackrundir = $(bindir)
 whttrackrun_SCRIPTS = webhttrack
 
 libhttrack_la_SOURCES =  htscore.c htsparse.c htsback.c htscache.c \
+	htscache_selftest.c \
 	htscatchurl.c htsfilters.c htsftp.c htshash.c coucal/coucal.c \
 	htshelp.c htslib.c htscoremain.c \
 	htsname.c htsrobots.c htstools.c htswizard.c \
@@ -65,7 +66,7 @@ libhttrack_la_SOURCES =  htscore.c htsparse.c htsback.c htscache.c \
 	md5.c \
 	minizip/ioapi.c minizip/mztools.c minizip/unzip.c minizip/zip.c \
 	hts-indextmpl.h htsalias.h htsback.h htsbase.h htssafe.h \
-	htsbasenet.h htsbauth.h htscache.h htscatchurl.h  \
+	htsbasenet.h htsbauth.h htscache.h htscache_selftest.h htscatchurl.h  \
 	htsconfig.h htscore.h htsparse.h htscoremain.h htsdefines.h  \
 	htsfilters.h htsftp.h htsglobal.h htshash.h coucal/coucal.h \
 	htshelp.h htsindex.h htslib.h htsmd5.h \
@@ -85,8 +86,9 @@ libhtsjava_la_SOURCES = htsjava.c htsjava.h
 libhtsjava_la_LIBADD = $(THREADS_LIBS) $(DL_LIBS) libhttrack.la
 # This thin JNI wrapper reaches libc only through libhttrack, so the direct
 # libc edge is dropped from DT_NEEDED (library-not-linked-against-libc). Force
-# libc to be recorded as a dependency.
-libhtsjava_la_LDFLAGS = $(AM_LDFLAGS) -version-info $(VERSION_INFO) -Wl,--push-state,--no-as-needed,-lc,--pop-state
+# libc back as a dependency; configure gates the flag since only a GNU-style
+# linker accepts it (LIBC_FORCE_LINK is empty on e.g. macOS).
+libhtsjava_la_LDFLAGS = $(AM_LDFLAGS) -version-info $(VERSION_INFO) $(LIBC_FORCE_LINK)
 
 EXTRA_DIST = httrack.h webhttrack \
 		coucal/murmurhash3.h.diff \
@@ -112,5 +114,12 @@ EXTRA_DIST = httrack.h webhttrack \
 		proxy/proxytrack.h \
 		proxy/store.h \
 		proxy/proxytrack.vcproj \
-		coucal/* \
-		*.dsw *.dsp *.vcproj
+		coucal/LICENSE \
+		coucal/Makefile \
+		coucal/README.md \
+		coucal/sample.c \
+		coucal/tests.c \
+		htsjava.vcproj \
+		httrack.dsp httrack.dsw httrack.vcproj \
+		libhttrack.dsp libhttrack.dsw libhttrack.vcproj \
+		webhttrack.dsp webhttrack.dsw webhttrack.vcproj

src/hts-indextmpl.h

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */

src/htsalias.c

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */
@@ -41,20 +41,6 @@ Please visit our Website: http://www.httrack.com
 
 #define _NOT_NULL(a) ( (a!=NULL) ? (a) : "" )
 
-// COPY OF cmdl_ins in htsmain.c
-// Insert a command in the argc/argv
-#define cmdl_ins(token,argc,argv,buff,ptr) \
-  { \
-  int i; \
-  for(i=argc;i>0;i--)\
-  argv[i]=argv[i-1];\
-  } \
-  argv[0]=(buff+ptr); \
-  strcpybuff(argv[0],token); \
-  ptr += (int) (strlen(argv[0])+1); \
-  argc++
-// END OF COPY OF cmdl_ins in htsmain.c
-
 /*
   Aliases for command-line and config file definitions
   These definitions can be used:
@@ -266,13 +252,18 @@ const char *hts_optalias[][4] = {
   return value: number of arguments treated (0 if error)
 */
 int optalias_check(int argc, const char *const *argv, int n_arg,
-                   int *return_argc, char **return_argv, char *return_error) {
+                   int *return_argc, char **return_argv,
+                   size_t return_argv_size, char *return_error,
+                   size_t return_error_size) {
   return_error[0] = '\0';
   *return_argc = 1;
   if (argv[n_arg][0] == '-')
     if (argv[n_arg][1] == '-') {
-      char command[1000];
-      char param[1000];
+      /* sized to HTS_CDLMAXSIZE: a long-form option value (--user-agent,
+         --headers, ...) is copied into param, and the value is bounded by the
+         general per-argument check in htscoremain.c (HTS_CDLMAXSIZE) */
+      char command[HTS_CDLMAXSIZE];
+      char param[HTS_CDLMAXSIZE];
       char addcommand[256];
 
       /* */
@@ -320,9 +311,10 @@ int optalias_check(int argc, const char *const *argv, int n_arg,
           /* Copy parameters? */
           if (need_param == 2) {
             if ((n_arg + 1 >= argc) || (argv[n_arg + 1][0] == '-')) {   /* no supplemental parameter */
-              sprintf(return_error,
-                      "Syntax error:\n\tOption %s needs to be followed by a parameter: %s <param>\n\t%s\n",
-                      command, command, _NOT_NULL(optalias_help(command)));
+              snprintf(return_error, return_error_size,
+                       "Syntax error:\n\tOption %s needs to be followed by a "
+                       "parameter: %s <param>\n\t%s\n",
+                       command, command, _NOT_NULL(optalias_help(command)));
               return 0;
             }
             strcpybuff(param, argv[n_arg + 1]);
@@ -335,35 +327,36 @@ int optalias_check(int argc, const char *const *argv, int n_arg,
 
         /* Must be alone (-P /tmp) */
         if (strcmp(hts_optalias[pos][2], "param1") == 0) {
-          strcpybuff(return_argv[0], command);
-          strcpybuff(return_argv[1], param);
+          strlcpybuff(return_argv[0], command, return_argv_size);
+          strlcpybuff(return_argv[1], param, return_argv_size);
           *return_argc = 2;     /* 2 parameters returned */
         }
         /* Alone with parameter (+*.gif) */
         else if (strcmp(hts_optalias[pos][2], "param0") == 0) {
           /* Command */
-          strcpybuff(return_argv[0], command);
-          strcatbuff(return_argv[0], param);
+          strlcpybuff(return_argv[0], command, return_argv_size);
+          strlcatbuff(return_argv[0], param, return_argv_size);
         }
         /* Together (-c8) */
         else {
           /* Command */
-          strcpybuff(return_argv[0], command);
+          strlcpybuff(return_argv[0], command, return_argv_size);
           /* Parameters accepted */
           if (strncmp(hts_optalias[pos][2], "param", 5) == 0) {
             /* --cache=off or --index=on */
             if (strcmp(param, "off") == 0)
-              strcatbuff(return_argv[0], "0");
+              strlcatbuff(return_argv[0], "0", return_argv_size);
             else if (strcmp(param, "on") == 0) {
               // on is the default
               // strcatbuff(return_argv[0],"1");
             } else
-              strcatbuff(return_argv[0], param);
+              strlcatbuff(return_argv[0], param, return_argv_size);
           }
           *return_argc = 1;     /* 1 parameter returned */
         }
       } else {
-        sprintf(return_error, "Unknown option: %s\n", command);
+        snprintf(return_error, return_error_size, "Unknown option: %s\n",
+                 command);
         return 0;
       }
       return need_param;
@@ -377,15 +370,16 @@ int optalias_check(int argc, const char *const *argv, int n_arg,
       if ((strcmp(hts_optalias[pos][2], "param1") == 0)
           || (strcmp(hts_optalias[pos][2], "param0") == 0)) {
         if ((n_arg + 1 >= argc) || (argv[n_arg + 1][0] == '-')) {       /* no supplemental parameter */
-          sprintf(return_error,
-                  "Syntax error:\n\tOption %s needs to be followed by a parameter: %s <param>\n\t%s\n",
-                  argv[n_arg], argv[n_arg],
-                  _NOT_NULL(optalias_help(argv[n_arg])));
+          snprintf(return_error, return_error_size,
+                   "Syntax error:\n\tOption %s needs to be followed by a "
+                   "parameter: %s <param>\n\t%s\n",
+                   argv[n_arg], argv[n_arg],
+                   _NOT_NULL(optalias_help(argv[n_arg])));
           return 0;
         }
         /* Copy parameters */
-        strcpybuff(return_argv[0], argv[n_arg]);
-        strcpybuff(return_argv[1], argv[n_arg + 1]);
+        strlcpybuff(return_argv[0], argv[n_arg], return_argv_size);
+        strlcpybuff(return_argv[1], argv[n_arg + 1], return_argv_size);
         /* And return */
         *return_argc = 2;       /* 2 parameters returned */
         return 2;               /* 2 parameters used */
@@ -394,7 +388,7 @@ int optalias_check(int argc, const char *const *argv, int n_arg,
   }
 
   /* Copy and return other unknown option */
-  strcpybuff(return_argv[0], argv[n_arg]);
+  strlcpybuff(return_argv[0], argv[n_arg], return_argv_size);
   return 1;
 }
 
@@ -460,7 +454,7 @@ const char *optalias_help(const char *token) {
 */
 /* Note: NOT utf-8 */
 int optinclude_file(const char *name, int *argc, char **argv, char *x_argvblk,
-                    int *x_ptr) {
+                    size_t x_argvblk_size, int *x_ptr) {
   FILE *fp;
 
   fp = fopen(name, "rb");
@@ -521,9 +515,10 @@ int optinclude_file(const char *name, int *argc, char **argv, char *x_argvblk,
             strcatbuff(_tmp_argv[0], a);
             strcpybuff(_tmp_argv[1], b);
 
-            result =
-              optalias_check(2, (const char *const *) tmp_argv, 0, &return_argc,
-                             (tmp_argv + 2), return_error);
+            result = optalias_check(2, (const char *const *) tmp_argv, 0,
+                                    &return_argc, (tmp_argv + 2),
+                                    sizeof(_tmp_argv[0]), return_error,
+                                    sizeof(return_error));
             if (!result) {
               printf("%s\n", return_error);
             } else {
@@ -533,14 +528,15 @@ int optinclude_file(const char *name, int *argc, char **argv, char *x_argvblk,
               /* temporary argc: Number of parameters after minus insert_after_argc */
               insert_after_argc = (*argc) - insert_after;
               cmdl_ins((tmp_argv[2]), insert_after_argc, (argv + insert_after),
-                       x_argvblk, (*x_ptr));
+                       x_argvblk, x_argvblk_size, (*x_ptr));
               *argc = insert_after_argc + insert_after;
               insert_after++;
               /* Second one */
               if (return_argc > 1) {
                 insert_after_argc = (*argc) - insert_after;
                 cmdl_ins((tmp_argv[3]), insert_after_argc,
-                         (argv + insert_after), x_argvblk, (*x_ptr));
+                         (argv + insert_after), x_argvblk, x_argvblk_size,
+                         (*x_ptr));
                 *argc = insert_after_argc + insert_after;
                 insert_after++;
               }

src/htsalias.h

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */
@@ -38,18 +38,48 @@ Please visit our Website: http://www.httrack.com
 #ifdef HTS_INTERNAL_BYTECODE
 extern const char *hts_optalias[][4];
 int optalias_check(int argc, const char *const *argv, int n_arg,
-                   int *return_argc, char **return_argv, char *return_error);
+                   int *return_argc, char **return_argv,
+                   size_t return_argv_size, char *return_error,
+                   size_t return_error_size);
 int optalias_find(const char *token);
 const char *optalias_help(const char *token);
 int optreal_find(const char *token);
 int optinclude_file(const char *name, int *argc, char **argv, char *x_argvblk,
-                    int *x_ptr);
+                    size_t x_argvblk_size, int *x_ptr);
 const char *optreal_value(int p);
 const char *optalias_value(int p);
 const char *opttype_value(int p);
 const char *opthelp_value(int p);
 const char *hts_gethome(void);
 void expand_home(String * str);
+
+/* Command-line argv-block builders, shared by htscoremain.c (the CLI parser)
+   and htsalias.c (config-file alias expansion). Tokens are packed back-to-back
+   into x_argvblk (total capacity bufsize); each argv[] entry points into the
+   block. cmdl_room bounds every copy: the running offset ptr can outrun the
+   block (alias / doit.log expansion outpacing the +32768 slack), so it yields
+   0 rather than a wrapped size_t and the bounded copy aborts cleanly. */
+#define cmdl_room(bufsize, ptr)                                                \
+  ((ptr) < (size_t) (bufsize) ? (size_t) (bufsize) - (ptr) : 0)
+
+/* Append a token as a new argv[argc]. */
+#define cmdl_add(token, argc, argv, buff, bufsize, ptr)                        \
+  argv[argc] = (buff + ptr);                                                   \
+  strlcpybuff(argv[argc], token, cmdl_room(bufsize, ptr));                     \
+  ptr += (int) (strlen(argv[argc]) + 1);                                       \
+  argc++
+
+/* Insert a token at argv[0], shifting the existing argc entries up by one. */
+#define cmdl_ins(token, argc, argv, buff, bufsize, ptr)                        \
+  {                                                                            \
+    int i;                                                                     \
+    for (i = argc; i > 0; i--)                                                 \
+      argv[i] = argv[i - 1];                                                   \
+  }                                                                            \
+  argv[0] = (buff + ptr);                                                      \
+  strlcpybuff(argv[0], token, cmdl_room(bufsize, ptr));                        \
+  ptr += (int) (strlen(argv[0]) + 1);                                          \
+  argc++
 #endif
 
 #endif

src/htsarrays.h

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 2014 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */

src/htsback.c

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */
@@ -1516,9 +1516,11 @@ int back_add(struct_back * sback, httrackp * opt, cache_back * cache, const char
 
           if (sscanf(text, "%d", &code) == 1) { // got code
             back[p].r.statuscode = code;
-            back[p].status = STATUS_READY;      // terminé
+            back[p].status = STATUS_READY;      // done
             if (lf != NULL && *lf != '\0') {    // got location ?
-              strcpybuff(back[p].r.location, lf + 1);
+              // r.location aliases location_buffer (set above); write the array
+              // so the bounded macro picks up its capacity.
+              strcpybuff(back[p].location_buffer, lf + 1);
             }
             return 0;
           }
@@ -3582,8 +3584,9 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
                         back[i].r.is_file = 1;
                         back[i].r.totalsize = back[i].r.size =
                           fsize_utf8(back[i].url_sav);
-                        get_httptype(opt, back[i].r.contenttype,
-                                     back[i].url_sav, 1);
+                        get_httptype_sized(opt, back[i].r.contenttype,
+                                           sizeof(back[i].r.contenttype),
+                                           back[i].url_sav, 1);
                         hts_log_print(opt, LOG_DEBUG,
                                       "Not-modified status without cache guessed: %s%s",
                                       back[i].url_adr, back[i].url_fil);
@@ -3996,26 +3999,30 @@ LLint back_transferred(LLint nb, struct_back * sback) {
   return nb;
 }
 
-// infos backing
-// j: 1 afficher sockets 2 afficher autres 3 tout afficher
+// backing info
+// j: 1=show sockets 2=show others 3=show all
 void back_info(struct_back * sback, int i, int j, FILE * fp) {
   lien_back *const back = sback->lnk;
   const int back_max = sback->count;
 
   assertf(i >= 0 && i < back_max);
   if (back[i].status >= 0) {
-    char BIGSTK s[HTS_URLMAXSIZE * 2 + 1024];
+    // Holds the status tag plus the full URL: url_adr and url_fil are each
+    // HTS_URLMAXSIZE*2, so reserve room for both (*4) plus framing/trailer.
+    // Undersizing would make back_infostr's bounded appends abort on a long
+    // URL.
+    char BIGSTK s[HTS_URLMAXSIZE * 4 + 1024];
 
     s[0] = '\0';
-    back_infostr(sback, i, j, s);
+    back_infostr(sback, i, j, s, sizeof(s));
     strcatbuff(s, LF);
     fprintf(fp, "%s", s);
   }
 }
 
-// infos backing
-// j: 1 afficher sockets 2 afficher autres 3 tout afficher
-void back_infostr(struct_back * sback, int i, int j, char *s) {
+// backing info
+// j: 1=show sockets 2=show others 3=show all
+void back_infostr(struct_back *sback, int i, int j, char *s, size_t size) {
   lien_back *const back = sback->lnk;
   const int back_max = sback->count;
 
@@ -4025,16 +4032,16 @@ void back_infostr(struct_back * sback, int i, int j, char *s) {
 
     if (j & 1) {
       if (back[i].status == STATUS_CONNECTING) {
-        strcatbuff(s, "CONNECT ");
+        strlcatbuff(s, "CONNECT ", size);
       } else if (back[i].status == STATUS_WAIT_HEADERS) {
-        strcatbuff(s, "INFOS ");
+        strlcatbuff(s, "INFOS ", size);
         aff = 1;
       } else if (back[i].status == STATUS_CHUNK_WAIT
                  || back[i].status == STATUS_CHUNK_CR) {
-        strcatbuff(s, "INFOSC");        // infos chunk
+        strlcatbuff(s, "INFOSC", size); // chunk info
         aff = 1;
       } else if (back[i].status > 0) {
-        strcatbuff(s, "RECEIVE ");
+        strlcatbuff(s, "RECEIVE ", size);
         aff = 1;
       }
     }
@@ -4042,44 +4049,44 @@ void back_infostr(struct_back * sback, int i, int j, char *s) {
       if (back[i].status == STATUS_READY) {
         switch (back[i].r.statuscode) {
         case 200:
-          strcatbuff(s, "READY ");
+          strlcatbuff(s, "READY ", size);
           aff = 1;
           break;
         case -1:
-          strcatbuff(s, "ERROR ");
+          strlcatbuff(s, "ERROR ", size);
           aff = 1;
           break;
         case -2:
-          strcatbuff(s, "TIMEOUT ");
+          strlcatbuff(s, "TIMEOUT ", size);
           aff = 1;
           break;
         case -3:
-          strcatbuff(s, "TOOSLOW ");
+          strlcatbuff(s, "TOOSLOW ", size);
           aff = 1;
           break;
         case 400:
-          strcatbuff(s, "BADREQUEST ");
+          strlcatbuff(s, "BADREQUEST ", size);
           aff = 1;
           break;
         case 401:
         case 403:
-          strcatbuff(s, "FORBIDDEN ");
+          strlcatbuff(s, "FORBIDDEN ", size);
           aff = 1;
           break;
         case 404:
-          strcatbuff(s, "NOT FOUND ");
+          strlcatbuff(s, "NOT FOUND ", size);
           aff = 1;
           break;
         case 500:
-          strcatbuff(s, "SERVERROR ");
+          strlcatbuff(s, "SERVERROR ", size);
           aff = 1;
           break;
         default:
           {
             char s2[256];
 
-            sprintf(s2, "ERROR(%d)", back[i].r.statuscode);
-            strcatbuff(s, s2);
+            snprintf(s2, sizeof(s2), "ERROR(%d)", back[i].r.statuscode);
+            strlcatbuff(s, s2, size);
           }
           aff = 1;
         }
@@ -4090,16 +4097,18 @@ void back_infostr(struct_back * sback, int i, int j, char *s) {
       {
         char BIGSTK s2[HTS_URLMAXSIZE * 2 + 1024];
 
-        sprintf(s2, "\"%s", back[i].url_adr);
-        strcatbuff(s, s2);
+        snprintf(s2, sizeof(s2), "\"%s", back[i].url_adr);
+        strlcatbuff(s, s2, size);
 
         if (back[i].url_fil[0] != '/')
-          strcatbuff(s, "/");
-        sprintf(s2, "%s\" ", back[i].url_fil);
-        strcatbuff(s, s2);
-        sprintf(s, LLintP " " LLintP " ", (LLint) back[i].r.size,
-                (LLint) back[i].r.totalsize);
-        strcatbuff(s, s2);
+          strlcatbuff(s, "/", size);
+        snprintf(s2, sizeof(s2), "%s\" ", back[i].url_fil);
+        strlcatbuff(s, s2, size);
+        // size/totalsize trailer: build in s2, then append (the old code wrote
+        // straight into s here, clobbering the URL it had just assembled).
+        snprintf(s2, sizeof(s2), LLintP " " LLintP " ", (LLint) back[i].r.size,
+                 (LLint) back[i].r.totalsize);
+        strlcatbuff(s, s2, size);
       }
     }
   }

src/htsback.h

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */
@@ -127,7 +127,7 @@ int back_trylive(httrackp * opt, cache_back * cache, struct_back * sback,
 int back_finalize(httrackp * opt, cache_back * cache, struct_back * sback,
                   const int p);
 void back_info(struct_back * sback, int i, int j, FILE * fp);
-void back_infostr(struct_back * sback, int i, int j, char *s);
+void back_infostr(struct_back *sback, int i, int j, char *s, size_t size);
 LLint back_transferred(LLint add, struct_back * sback);
 
 // hostback

src/htsbase.h

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */

src/htsbasenet.h

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */

src/htsbauth.c

@@ -1,6 +1,8 @@
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -15,11 +17,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */
@@ -102,7 +102,8 @@ int cookie_add(t_cookie * cookie, const char *cook_name, const char *cook_value,
   strcatbuff(cook, "\n");
   if (!((strlen(cookie->data) + strlen(cook)) < cookie->max_len))
     return -1;                  // impossible d'ajouter
-  cookie_insert(insert, cook);
+  cookie_insert(insert, cookie->max_len - (size_t) (insert - cookie->data),
+                cook);
 #if DEBUG_COOK
   printf("add_new cookie: name=\"%s\" value=\"%s\" domain=\"%s\" path=\"%s\"\n",
          cook_name, cook_value, domain, path);
@@ -118,7 +119,7 @@ int cookie_del(t_cookie * cookie, const char *cook_name, const char *domain, con
   b = cookie_find(cookie->data, cook_name, domain, path);
   if (b) {
     a = cookie_nextfield(b);
-    cookie_delete(b, a - b);
+    cookie_delete(b, cookie->max_len - (size_t) (b - cookie->data), a - b);
 #if DEBUG_COOK
     printf("deleted old cookie: %s %s %s\n", cook_name, domain, path);
 #endif
@@ -336,41 +337,44 @@ int cookie_save(t_cookie * cookie, const char *name) {
   return -1;
 }
 
-// insertion chaine ins avant s
-void cookie_insert(char *s, const char *ins) {
+// Insert string ins before s. s_size is the capacity of the buffer at s.
+void cookie_insert(char *s, size_t s_size, const char *ins) {
   char *buff;
 
-  if (strnotempty(s) == 0) {    // rien à faire, juste concat
-    strcatbuff(s, ins);
+  if (strnotempty(s) == 0) { // nothing there yet: just concatenate
+    strlcatbuff(s, ins, s_size);
   } else {
     buff = (char *) malloct(strlen(s) + 1);
     if (buff) {
-      strcpybuff(buff, s);      // copie temporaire
-      strcpybuff(s, ins);       // insérer
-      strcatbuff(s, buff);      // copier
+      strlcpybuff(buff, s, strlen(s) + 1); // temporary copy of s
+      strlcpybuff(s, ins, s_size);         // write ins
+      strlcatbuff(s, buff, s_size);        // then the saved content
       freet(buff);
     }
   }
 }
 
-// destruction chaine dans s position pos
-void cookie_delete(char *s, size_t pos) {
+// Delete the substring of s at position pos. s_size is the capacity at s.
+void cookie_delete(char *s, size_t s_size, size_t pos) {
   char *buff;
 
-  if (strnotempty(s + pos) == 0) {      // rien à faire, effacer
+  if (strnotempty(s + pos) == 0) { // nothing after pos: truncate
     s[0] = '\0';
   } else {
     buff = (char *) malloct(strlen(s + pos) + 1);
     if (buff) {
-      strcpybuff(buff, s + pos);        // copie temporaire
-      strcpybuff(s, buff);      // copier
+      strlcpybuff(buff, s + pos, strlen(s + pos) + 1); // temporary copy
+      strlcpybuff(s, buff, s_size);                    // overwrite from start
       freet(buff);
     }
   }
 }
 
-// renvoie champ param de la chaine cookie_base
-// ex: cookie_get("ceci est<tab>un<tab>exemple",1) renvoi "un"
+// Return field <param> (0-based, tab-separated) of the cookie line cookie_base,
+// into buffer. ex: cookie_get("ceci est<tab>un<tab>exemple", 1) returns "un".
+// buffer must hold at least COOKIE_FIELD_BUFFER_SIZE bytes (all callers use
+// char[8192]).
+#define COOKIE_FIELD_BUFFER_SIZE 8192
 const char *cookie_get(char *buffer, const char *cookie_base, int param) {
   const char *limit;
 
@@ -394,11 +398,11 @@ const char *cookie_get(char *buffer, const char *cookie_base, int param) {
     if (cookie_base) {
       if (cookie_base < limit) {
         const char *a = cookie_base;
+        htsbuff b = htsbuff_ptr(buffer, COOKIE_FIELD_BUFFER_SIZE);
 
         while((*a) && (*a != '\t') && (*a != '\n'))
           a++;
-        buffer[0] = '\0';
-        strncatbuff(buffer, cookie_base, (int) (a - cookie_base));
+        htsbuff_catn(&b, cookie_base, (size_t) (a - cookie_base));
         return buffer;
       } else
         return "";
@@ -458,11 +462,13 @@ char *bauth_check(t_cookie * cookie, const char *adr, const char *fil) {
   return NULL;
 }
 
+/* Build the auth prefix (host + path, query stripped) into prefix.
+   Callers pass a buffer of HTS_URLMAXSIZE * 2 bytes. */
 char *bauth_prefix(char *prefix, const char *adr, const char *fil) {
   char *a;
 
-  strcpybuff(prefix, jump_identification_const(adr));
-  strcatbuff(prefix, fil);
+  strlcpybuff(prefix, jump_identification_const(adr), HTS_URLMAXSIZE * 2);
+  strlcatbuff(prefix, fil, HTS_URLMAXSIZE * 2);
   a = strchr(prefix, '?');
   if (a)
     *a = '\0';

src/htsbauth.h

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */
@@ -67,8 +67,8 @@ int cookie_add(t_cookie * cookie, const  char *cook_name, const  char *cook_valu
 int cookie_del(t_cookie * cookie, const char *cook_name, const char *domain, const char *path);
 int cookie_load(t_cookie * cookie, const char *path, const char *name);
 int cookie_save(t_cookie * cookie, const char *name);
-void cookie_insert(char *s, const char *ins);
-void cookie_delete(char *s, size_t pos);
+void cookie_insert(char *s, size_t s_size, const char *ins);
+void cookie_delete(char *s, size_t s_size, size_t pos);
 const char *cookie_get(char *buffer, const char *cookie_base, int param);
 char *cookie_find(char *s, const char *cook_name, const char *domain, const char *path);
 char *cookie_nextfield(char *a);

src/htscache.c

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */
@@ -196,12 +196,13 @@ struct cache_back_zip_entry {
   int compressionMethod;
 };
 
-#define ZIP_READFIELD_STRING(line, value, refline, refvalue) do { \
-  if (line[0] != '\0' && strfield2(line, refline)) { \
-    strcpybuff(refvalue, value); \
-    line[0] = '\0'; \
-	} \
-} while(0)
+#define ZIP_READFIELD_STRING(line, value, refline, refvalue, refvalue_size)    \
+  do {                                                                         \
+    if (line[0] != '\0' && strfield2(line, refline)) {                         \
+      strlcpybuff(refvalue, value, refvalue_size);                             \
+      line[0] = '\0';                                                          \
+    }                                                                          \
+  } while (0)
 #define ZIP_READFIELD_INT(line, value, refline, refvalue) do { \
   if (line[0] != '\0' && strfield2(line, refline)) { \
     int intval = 0; \
@@ -643,7 +644,7 @@ static htsblk cache_readex_new(httrackp * opt, cache_back * cache,
   } else {
     r.location = location_default;
   }
-  strcpybuff(r.location, "");
+  r.location[0] = '\0';
   strcpybuff(buff, adr);
   strcatbuff(buff, fil);
   hash_pos_return = coucal_read(cache->hashtable, buff, &hash_pos);
@@ -706,17 +707,25 @@ static htsblk cache_readex_new(httrackp * opt, cache_back * cache,
                 value++;
               ZIP_READFIELD_INT(line, value, "X-In-Cache", dataincache);
               ZIP_READFIELD_INT(line, value, "X-Statuscode", r.statuscode);
-              ZIP_READFIELD_STRING(line, value, "X-StatusMessage", r.msg);      // msg
+              ZIP_READFIELD_STRING(line, value, "X-StatusMessage", r.msg,
+                                   sizeof(r.msg));
               ZIP_READFIELD_LLINT(line, value, "X-Size", r.size);       // size
-              ZIP_READFIELD_STRING(line, value, "Content-Type", r.contenttype); // contenttype
-              ZIP_READFIELD_STRING(line, value, "X-Charset", r.charset);        // contenttype
-              ZIP_READFIELD_STRING(line, value, "Last-Modified", r.lastmodified);       // last-modified
-              ZIP_READFIELD_STRING(line, value, "Etag", r.etag);        // Etag
-              ZIP_READFIELD_STRING(line, value, "Location", r.location);        // 'location' pour moved
-              ZIP_READFIELD_STRING(line, value, "Content-Disposition", r.cdispo);       // Content-disposition
+              ZIP_READFIELD_STRING(line, value, "Content-Type", r.contenttype,
+                                   sizeof(r.contenttype));
+              ZIP_READFIELD_STRING(line, value, "X-Charset", r.charset,
+                                   sizeof(r.charset));
+              ZIP_READFIELD_STRING(line, value, "Last-Modified", r.lastmodified,
+                                   sizeof(r.lastmodified));
+              ZIP_READFIELD_STRING(line, value, "Etag", r.etag, sizeof(r.etag));
+              // r.location is a char* pointing into a HTS_URLMAXSIZE*2 buffer
+              ZIP_READFIELD_STRING(line, value, "Location", r.location,
+                                   HTS_URLMAXSIZE * 2);
+              ZIP_READFIELD_STRING(line, value, "Content-Disposition", r.cdispo,
+                                   sizeof(r.cdispo));
               //ZIP_READFIELD_STRING(line, value, "X-Addr", ..);            // Original address
               //ZIP_READFIELD_STRING(line, value, "X-Fil", ..);            // Original URI filename
-              ZIP_READFIELD_STRING(line, value, "X-Save", previous_save_);      // Original save filename
+              ZIP_READFIELD_STRING(line, value, "X-Save", previous_save_,
+                                   sizeof(previous_save_));
             }
           } while(offset < readSizeHeader && !lineEof);
           //totalHeader = offset;
@@ -733,7 +742,7 @@ static htsblk cache_readex_new(httrackp * opt, cache_back * cache,
             }
           }
           if (return_save != NULL) {
-            strcpybuff(return_save, previous_save);
+            strlcpybuff(return_save, previous_save, HTS_URLMAXSIZE * 2);
           }
 
           /* Complete fields */
@@ -930,7 +939,7 @@ static htsblk cache_readex_new(httrackp * opt, cache_back * cache,
                   FILE *const fp = FOPEN(fconv(catbuff, sizeof(catbuff), previous_save), "rb");
 
                   if (fp != NULL) {
-                    r.adr = (char *) malloct((int) r.size + 4);
+                    r.adr = (char *) malloct((int) r.size + 1);
                     if (r.adr != NULL) {
                       if (r.size > 0
                           && fread(r.adr, 1, (int) r.size, fp) != r.size) {
@@ -939,7 +948,8 @@ static htsblk cache_readex_new(httrackp * opt, cache_back * cache,
                         r.statuscode = STATUSCODE_INVALID;
                         sprintf(r.msg, "Read error in cache disk data: %s",
                                 strerror(last_errno));
-                      }
+                      } else if (r.size >= 0)
+                        *(r.adr + r.size) = '\0';
                     } else {
                       r.statuscode = STATUSCODE_INVALID;
                       strcpybuff(r.msg,
@@ -956,7 +966,7 @@ static htsblk cache_readex_new(httrackp * opt, cache_back * cache,
               // Data in cache.
               else {
                 // lire fichier (d'un coup)
-                r.adr = (char *) malloct((int) r.size + 4);
+                r.adr = (char *) malloct((int) r.size + 1);
                 if (r.adr != NULL) {
                   if (unzReadCurrentFile((unzFile) cache->zipInput, r.adr, (int) r.size) != r.size) {   // erreur
                     freet(r.adr);
@@ -1025,7 +1035,7 @@ static htsblk cache_readex_old(httrackp * opt, cache_back * cache,
   } else {
     r.location = location_default;
   }
-  strcpybuff(r.location, "");
+  r.location[0] = '\0';
 #if HTS_FAST_CACHE
   strcpybuff(buff, adr);
   strcatbuff(buff, fil);
@@ -1096,30 +1106,34 @@ static htsblk cache_readex_old(httrackp * opt, cache_back * cache,
         //
         cache_rint(cache->olddat, &r.statuscode);
         cache_rLLint(cache->olddat, &r.size);
-        cache_rstr(cache->olddat, r.msg);
-        cache_rstr(cache->olddat, r.contenttype);
+        cache_rstr(cache->olddat, r.msg, sizeof(r.msg));
+        cache_rstr(cache->olddat, r.contenttype, sizeof(r.contenttype));
         if (cache->version >= 3)
-          cache_rstr(cache->olddat, r.charset);
-        cache_rstr(cache->olddat, r.lastmodified);
-        cache_rstr(cache->olddat, r.etag);
-        cache_rstr(cache->olddat, r.location);
+          cache_rstr(cache->olddat, r.charset, sizeof(r.charset));
+        cache_rstr(cache->olddat, r.lastmodified, sizeof(r.lastmodified));
+        cache_rstr(cache->olddat, r.etag, sizeof(r.etag));
+        // r.location points into a HTS_URLMAXSIZE*2 buffer
+        cache_rstr(cache->olddat, r.location, HTS_URLMAXSIZE * 2);
         if (cache->version >= 2)
-          cache_rstr(cache->olddat, r.cdispo);
+          cache_rstr(cache->olddat, r.cdispo, sizeof(r.cdispo));
         if (cache->version >= 4) {
-          cache_rstr(cache->olddat, previous_save);     // adr
-          cache_rstr(cache->olddat, previous_save);     // fil
+          cache_rstr(cache->olddat, previous_save,
+                     sizeof(previous_save)); // adr
+          cache_rstr(cache->olddat, previous_save,
+                     sizeof(previous_save)); // fil
           previous_save[0] = '\0';
-          cache_rstr(cache->olddat, previous_save);     // save
+          cache_rstr(cache->olddat, previous_save,
+                     sizeof(previous_save)); // save
           if (return_save != NULL) {
-            strcpybuff(return_save, previous_save);
+            strlcpybuff(return_save, previous_save, HTS_URLMAXSIZE * 2);
           }
         }
         if (cache->version >= 5) {
           r.headers = cache_rstr_addr(cache->olddat);
         }
         //
-        cache_rstr(cache->olddat, check);
-        if (strcmp(check, "HTS") == 0) {        /* intégrité OK */
+        cache_rstr(cache->olddat, check, sizeof(check));
+        if (strcmp(check, "HTS") == 0) { /* integrity OK */
           ok = 1;
         }
         cache_rLLint(cache->olddat, &size_read);        /* lire size pour être sûr de la taille déclarée (réécrire) */
@@ -1232,13 +1246,14 @@ static htsblk cache_readex_old(httrackp * opt, cache_back * cache,
                     FILE *fp = FOPEN(fconv(catbuff, sizeof(catbuff), return_save), "rb");
 
                     if (fp != NULL) {
-                      r.adr = (char *) malloct((size_t) r.size + 4);
+                      r.adr = (char *) malloct((size_t) r.size + 1);
                       if (r.adr != NULL) {
                         if (r.size > 0
                             && fread(r.adr, 1, (size_t) r.size, fp) != r.size) {
                           r.statuscode = STATUSCODE_INVALID;
                           strcpybuff(r.msg, "Read error in cache disk data");
-                        }
+                        } else if (r.size >= 0)
+                          *(r.adr + r.size) = '\0';
                       } else {
                         r.statuscode = STATUSCODE_INVALID;
                         strcpybuff(r.msg,
@@ -1253,7 +1268,7 @@ static htsblk cache_readex_old(httrackp * opt, cache_back * cache,
                 }
               } else {
                 // lire fichier (d'un coup)
-                r.adr = (char *) malloct((size_t) r.size + 4);
+                r.adr = (char *) malloct((size_t) r.size + 1);
                 if (r.adr != NULL) {
                   if (fread(r.adr, 1, (size_t) r.size, cache->olddat) != r.size) {      // erreur
                     freet(r.adr);
@@ -1356,10 +1371,11 @@ int cache_readdata(cache_back * cache, const char *str1, const char *str2,
 
         cache_rint(cache->olddat, &len);
         if (len > 0) {
-          char *mem_buff = (char *) malloct(len + 4);   /* Plus byte 0 */
+          char *mem_buff = (char *) malloct(len + 1); /* trailing \0 */
 
           if (mem_buff) {
             if (fread(mem_buff, 1, len, cache->olddat) == len) {        // lire tout (y compris statuscode etc)*/
+              mem_buff[len] = '\0';
               *inbuff = mem_buff;
               *inlen = len;
               return 1;
@@ -1758,12 +1774,12 @@ void cache_init(cache_back * cache, httrackp * opt) {
           char firstline[256];
           char *a = cache->use;
 
-          a += cache_brstr(a, firstline);
-          if (strncmp(firstline, "CACHE-", 6) == 0) {   // Nouvelle version du cache
-            if (strncmp(firstline, "CACHE-1.", 8) == 0) {       // Version 1.1x
+          a += cache_brstr(a, firstline, sizeof(firstline));
+          if (strncmp(firstline, "CACHE-", 6) == 0) {     // new cache format
+            if (strncmp(firstline, "CACHE-1.", 8) == 0) { // version 1.1x
               cache->version = (int) (firstline[8] - '0');      // cache 1.x
               if (cache->version <= 5) {
-                a += cache_brstr(a, firstline);
+                a += cache_brstr(a, firstline, sizeof(firstline));
                 strcpybuff(cache->lastmodified, firstline);
               } else {
                 hts_log_print(opt, LOG_ERROR,
@@ -1774,7 +1790,7 @@ void cache_init(cache_back * cache, httrackp * opt) {
                 freet(cache->use);
                 cache->use = NULL;
               }
-            } else {            // non supporté
+            } else { // non supporté
               hts_log_print(opt, LOG_ERROR,
                             "Cache: %s not supported, ignoring current cache",
                             firstline);
@@ -1784,7 +1800,7 @@ void cache_init(cache_back * cache, httrackp * opt) {
               cache->use = NULL;
             }
             /* */
-          } else {              // Vieille version du cache
+          } else { // Vieille version du cache
             /* */
             hts_log_print(opt, LOG_WARNING,
                           "Cache: importing old cache format");
@@ -2088,7 +2104,7 @@ char *readfile_or(const char *fil, const char *defaultdata) {
     char *adr = malloct(strlen(defaultdata) + 1);
 
     if (adr) {
-      strcpybuff(adr, defaultdata);
+      strlcpybuff(adr, defaultdata, strlen(defaultdata) + 1);
       return adr;
     }
   }
@@ -2109,7 +2125,7 @@ int cache_wstr(FILE * fp, const char *s) {
     return -1;
   return 0;
 }
-void cache_rstr(FILE * fp, char *s) {
+void cache_rstr(FILE *fp, char *s, size_t s_size) {
   INTsys i;
   char buff[256 + 4];
 
@@ -2118,13 +2134,26 @@ void cache_rstr(FILE * fp, char *s) {
   if (i < 0 || i > 32768)       /* error, something nasty happened */
     i = 0;
   if (i > 0) {
-    if ((int) fread(s, 1, i, fp) != i) {
+    /* Store at most s_size-1 bytes into s, but consume all i bytes from the
+       stream so the next field stays aligned (the field may be longer than the
+       destination in a tampered/old cache). */
+    const size_t want = (size_t) i;
+    const size_t store = want < s_size ? want : s_size - 1;
+
+    if (fread(s, 1, store, fp) != store) {
       int fread_cache_failed = 0;
 
       assertf(fread_cache_failed);
     }
+    if (want > store && fseek(fp, (long) (want - store), SEEK_CUR) != 0) {
+      int fseek_cache_failed = 0;
+
+      assertf(fseek_cache_failed);
+    }
+    s[store] = '\0';
+  } else {
+    s[0] = '\0';
   }
-  *(s + i) = '\0';
 }
 char *cache_rstr_addr(FILE * fp) {
   INTsys i;
@@ -2148,7 +2177,7 @@ char *cache_rstr_addr(FILE * fp) {
   }
   return addr;
 }
-int cache_brstr(char *adr, char *s) {
+int cache_brstr(char *adr, char *s, size_t s_size) {
   int i;
   int off;
   char buff[256 + 4];
@@ -2156,23 +2185,17 @@ int cache_brstr(char *adr, char *s) {
   off = binput(adr, buff, 256);
   adr += off;
   sscanf(buff, "%d", &i);
-  if (i > 0)
-    strncpy(s, adr, i);
-  *(s + i) = '\0';
-  off += i;
-  return off;
-}
-int cache_quickbrstr(char *adr, char *s) {
-  int i;
-  int off;
-  char buff[256 + 4];
+  if (i < 0 || i > 32768) /* guard a corrupt length */
+    i = 0;
+  if (i > 0) {
+    /* copy at most s_size-1 bytes; advance past the full field regardless */
+    const size_t store = (size_t) i < s_size ? (size_t) i : s_size - 1;
 
-  off = binput(adr, buff, 256);
-  adr += off;
-  sscanf(buff, "%d", &i);
-  if (i > 0)
-    strncpy(s, adr, i);
-  *(s + i) = '\0';
+    strncpy(s, adr, store);
+    s[store] = '\0';
+  } else {
+    s[0] = '\0';
+  }
   off += i;
   return off;
 }
@@ -2180,7 +2203,7 @@ int cache_quickbrstr(char *adr, char *s) {
 /* idem, mais en int */
 int cache_brint(char *adr, int *i) {
   char s[256];
-  int r = cache_brstr(adr, s);
+  int r = cache_brstr(adr, s, sizeof(s));
 
   if (r != -1)
     sscanf(s, "%d", i);
@@ -2189,7 +2212,7 @@ int cache_brint(char *adr, int *i) {
 void cache_rint(FILE * fp, int *i) {
   char s[256];
 
-  cache_rstr(fp, s);
+  cache_rstr(fp, s, sizeof(s));
   sscanf(s, "%d", i);
 }
 int cache_wint(FILE * fp, int i) {
@@ -2201,7 +2224,7 @@ int cache_wint(FILE * fp, int i) {
 void cache_rLLint(FILE * fp, LLint * i) {
   char s[256];
 
-  cache_rstr(fp, s);
+  cache_rstr(fp, s, sizeof(s));
   sscanf(s, LLintP, i);
 }
 int cache_wLLint(FILE * fp, LLint i) {

src/htscache.h

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */
@@ -80,10 +80,9 @@ int cache_writedata(FILE * cache_ndx, FILE * cache_dat, const char *str1,
 int cache_readdata(cache_back * cache, const char *str1, const char *str2,
                    char **inbuff, int *len);
 
-void cache_rstr(FILE * fp, char *s);
+void cache_rstr(FILE *fp, char *s, size_t s_size);
 char *cache_rstr_addr(FILE * fp);
-int cache_brstr(char *adr, char *s);
-int cache_quickbrstr(char *adr, char *s);
+int cache_brstr(char *adr, char *s, size_t s_size);
 int cache_brint(char *adr, int *i);
 void cache_rint(FILE * fp, int *i);
 void cache_rLLint(FILE * fp, LLint * i);

src/htscache_selftest.c

@@ -0,0 +1,587 @@
+/* ------------------------------------------------------------ */
+/*
+HTTrack Website Copier, Offline Browser for Windows and Unix
+Copyright (C) 2026 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
+
+Please visit our Website: http://www.httrack.com
+*/
+
+/* ------------------------------------------------------------ */
+/* File: htscache_selftest.c subroutines:                       */
+/*       in-process self-test for the (ZIP) cache subsystem      */
+/* Author: Xavier Roche                                         */
+/* ------------------------------------------------------------ */
+
+/* Drives the public cache API (cache_init / cache_add / cache_readex)
+   through a create -> read -> update cycle on a real on-disk ZIP cache,
+   asserting every header field and the (binary-safe) body round-trips.
+   Besides a few hand-crafted edge cases it stores a few thousand entries
+   (index/lookup scale) and a handful of large compressible/incompressible
+   bodies (zlib deflate/inflate). Reached via `httrack -#A <dir>`. */
+
+#define HTS_INTERNAL_BYTECODE
+
+#include "htscache_selftest.h"
+
+#include "htscache.h"
+#include "htscore.h"
+#include "htslib.h"
+#include "htszlib.h"
+
+#include <stdio.h>
+#include <string.h>
+
+#define SELFTEST_VOLUME 3000 /* number of small entries in the scale pass */
+
+/* prefix on assertion failures; set per entry point (-#A vs -#B) */
+static const char *selftest_tag = "cache-selftest";
+
+/* Open a cache session. A write session (ro=0) rotates new.zip -> old.zip and
+   opens a fresh new.zip; a read session (ro=1) opens new.zip in place. */
+static void selftest_open(cache_back *cache, httrackp *opt, int ro) {
+  memset(cache, 0, sizeof(*cache));
+  cache->type = 1;
+  cache->log = stderr;
+  cache->errlog = stderr;
+  cache->hashtable = coucal_new(0);
+  cache->ro = ro;
+  cache_init(cache, opt);
+}
+
+static void selftest_open_for_write(cache_back *cache, httrackp *opt) {
+  selftest_open(cache, opt, 0);
+}
+
+static void selftest_open_for_read(cache_back *cache, httrackp *opt) {
+  selftest_open(cache, opt, 1);
+}
+
+static void selftest_close(cache_back *cache) {
+  if (cache->dat != NULL) {
+    fclose(cache->dat);
+    cache->dat = NULL;
+  }
+  if (cache->ndx != NULL) {
+    fclose(cache->ndx);
+    cache->ndx = NULL;
+  }
+  if (cache->zipOutput != NULL) {
+    zipClose(cache->zipOutput,
+             "Created by HTTrack Website Copier (cache self-test)");
+    cache->zipOutput = NULL;
+  }
+  if (cache->zipInput != NULL) {
+    unzClose(cache->zipInput);
+    cache->zipInput = NULL;
+  }
+  /* hashtable is intentionally not coucal_delete()d: it would dump a stats
+     summary to stderr on every call, and this is a one-shot CLI subcommand
+     that exits right after (same choice as the other -# cache subcommands) */
+}
+
+/* Store one entry; the body is copied so callers may pass const data. */
+static void store_entry(httrackp *opt, cache_back *cache, const char *adr,
+                        const char *fil, const char *save, int statuscode,
+                        const char *msg, const char *contenttype,
+                        const char *charset, const char *lastmodified,
+                        const char *etag, const char *location,
+                        const char *cdispo, const char *body, size_t body_len) {
+  htsblk r;
+  char locbuf[HTS_URLMAXSIZE * 2];
+  char *bodycopy = NULL;
+
+  hts_init_htsblk(&r);
+  r.statuscode = statuscode;
+  r.size = (LLint) body_len;
+  strcpybuff(r.msg, msg);
+  strcpybuff(r.contenttype, contenttype);
+  strcpybuff(r.charset, charset);
+  strcpybuff(r.lastmodified, lastmodified);
+  strcpybuff(r.etag, etag);
+  strcpybuff(r.cdispo, cdispo);
+  strcpybuff(locbuf, location);
+  r.location = locbuf;
+  r.is_write = 0;
+  /* an empty body must be NULL: cache_add rejects non-NULL with size 0 */
+  if (body_len != 0) {
+    bodycopy = malloct(body_len);
+    memcpy(bodycopy, body, body_len);
+    r.adr = bodycopy;
+  }
+  /* all_in_cache=1: body stays in the ZIP, so reads never need a disk file */
+  cache_add(opt, cache, &r, adr, fil, save, 1, NULL);
+  if (bodycopy != NULL) {
+    freet(bodycopy);
+  }
+}
+
+/* Read one entry back and check every field. Returns the mismatch count. */
+static int check_entry(httrackp *opt, cache_back *cache, const char *adr,
+                       const char *fil, int statuscode, const char *msg,
+                       const char *contenttype, const char *charset,
+                       const char *lastmodified, const char *etag,
+                       const char *location, const char *cdispo,
+                       const char *body, size_t body_len) {
+  int fail = 0;
+  char *locbuf = malloct(HTS_URLMAXSIZE * 2);
+  htsblk r;
+
+  locbuf[0] = '\0';
+  /* readonly=1: pure read, no rename/disk-write decision logic */
+  r = cache_readex(opt, cache, adr, fil, "", locbuf, NULL, 1);
+
+#define CHECK_STR(field, want)                                                 \
+  do {                                                                         \
+    if (strcmp((field), (want)) != 0) {                                        \
+      fprintf(stderr, "%s: %s%s: " #field " is '%s', expected '%s'\n",         \
+              selftest_tag, adr, fil, (field), (want));                        \
+      fail++;                                                                  \
+    }                                                                          \
+  } while (0)
+
+  if (r.statuscode != statuscode) {
+    fprintf(stderr, "%s: %s%s: statuscode is %d, expected %d\n", selftest_tag,
+            adr, fil, r.statuscode, statuscode);
+    fail++;
+  }
+  CHECK_STR(r.msg, msg);
+  CHECK_STR(r.contenttype, contenttype);
+  CHECK_STR(r.charset, charset);
+  CHECK_STR(r.lastmodified, lastmodified);
+  CHECK_STR(r.etag, etag);
+  CHECK_STR(locbuf, location);
+  CHECK_STR(r.cdispo, cdispo);
+
+  if (r.size != (LLint) body_len) {
+    fprintf(stderr, "%s: %s%s: size is " LLintP ", expected %d\n", selftest_tag,
+            adr, fil, (LLint) r.size, (int) body_len);
+    fail++;
+  } else if (body_len != 0 &&
+             (r.adr == NULL || memcmp(r.adr, body, body_len) != 0)) {
+    fprintf(stderr, "%s: %s%s: body mismatch\n", selftest_tag, adr, fil);
+    fail++;
+  }
+
+  /* loaded body must be NUL-terminated at [size] for cache_readex's strlen()
+     consumers; buffer is malloc(size + slack) so [size] is in bounds */
+  if (r.adr != NULL && r.adr[r.size] != '\0') {
+    fprintf(stderr, "%s: %s%s: body not NUL-terminated at [size]\n",
+            selftest_tag, adr, fil);
+    fail++;
+  }
+
+#undef CHECK_STR
+
+  if (r.adr != NULL) {
+    freet(r.adr);
+  }
+  freet(locbuf);
+  return fail;
+}
+
+/* Fill a body of the requested size. kind 0 is highly compressible (a short
+   repeating pattern), kind 1 is incompressible (a deterministic PRNG), kind 2
+   alternates the two -- together they exercise both deflate outcomes. */
+static void gen_body(char *buf, size_t len, int kind) {
+  unsigned int seed = 0x9e3779b1u ^ (unsigned int) len;
+  size_t j;
+
+  for (j = 0; j < len; j++) {
+    if (kind == 0 || (kind == 2 && (j & 1) == 0)) {
+      buf[j] = (char) ('A' + (j % 26));
+    } else {
+      seed = seed * 1103515245u + 12345u;
+      buf[j] = (char) (seed >> 16);
+    }
+  }
+}
+
+/* Exercise the disk-fallback read path: a record stored with X-In-Cache: 0
+   keeps its body on disk (not in the ZIP), and cache_readex must load it from
+   there. The one-shot crawl tests never re-read such a body into memory, so
+   this path otherwise has no runtime coverage. We store the header with
+   all_in_cache=0 and a non-hypertext content-type (-> X-In-Cache: 0), create
+   the body at the exact fconv()-resolved path the reader uses, then read it
+   back and assert it round-trips and is NUL-terminated. */
+static int disk_fallback_selftest(httrackp *opt) {
+  int fail = 0;
+  cache_back cache;
+  htsblk r;
+  char catbuff[HTS_URLMAXSIZE * 2];
+  char *path;
+  char *locbuf;
+  FILE *fp;
+  const char *const adr = "example.com";
+  const char *const fil = "/blob.bin";
+  char save[HTS_URLMAXSIZE * 2];
+  /* no embedded NUL: were the read to leave this un-terminated, a later
+     strlen() would run off the end (the bug this guards) */
+  static const char body[] = "BINARY-on-disk-body-0123456789-no-trailing-nul";
+  const size_t body_len = sizeof(body) - 1;
+
+  /* X-Save must start with path_html_utf8 so the reader resolves it verbatim
+     (otherwise it re-roots it as a pre-3.40 relative path); then the body we
+     create at fconv(save) is exactly where cache_readex looks for it. */
+  fconcat(save, sizeof(save), StringBuff(opt->path_html_utf8),
+          "example.com/blob.bin");
+
+  /* write only the header (X-In-Cache: 0); the body stays on disk */
+  selftest_open_for_write(&cache, opt);
+  {
+    htsblk w;
+    char locw[4];
+    char *bodycopy = malloct(body_len);
+
+    hts_init_htsblk(&w);
+    w.statuscode = 200;
+    w.size = (LLint) body_len;
+    strcpybuff(w.msg, "OK");
+    strcpybuff(w.contenttype, "application/octet-stream");
+    locw[0] = '\0';
+    w.location = locw;
+    w.is_write = 0;
+    memcpy(bodycopy, body, body_len);
+    w.adr = bodycopy;
+    cache_add(opt, &cache, &w, adr, fil, save, 0 /* all_in_cache */, NULL);
+    freet(bodycopy);
+  }
+  selftest_close(&cache);
+
+  /* create the on-disk body where the reader will look for it */
+  path = fconv(catbuff, sizeof(catbuff), save);
+  (void) structcheck(path);
+  fp = FOPEN(path, "wb");
+  if (fp == NULL) {
+    fprintf(stderr, "cache-selftest: disk-fallback: cannot create '%s'\n",
+            path);
+    return 1;
+  }
+  if (fwrite(body, 1, body_len, fp) != body_len) {
+    fprintf(stderr, "cache-selftest: disk-fallback: short write to '%s'\n",
+            path);
+    fail++;
+  }
+  fclose(fp);
+
+  /* read it back: takes the X-In-Cache: 0 disk-fallback branch */
+  selftest_open_for_read(&cache, opt);
+  locbuf = malloct(HTS_URLMAXSIZE * 2);
+  locbuf[0] = '\0';
+  r = cache_readex(opt, &cache, adr, fil, "", locbuf, NULL, 1);
+  if (r.statuscode != 200) {
+    fprintf(stderr,
+            "cache-selftest: disk-fallback: statuscode %d, expected 200"
+            " (path not taken or read failed)\n",
+            r.statuscode);
+    fail++;
+  }
+  if (r.size != (LLint) body_len) {
+    fprintf(stderr,
+            "cache-selftest: disk-fallback: size " LLintP ", expected %d\n",
+            (LLint) r.size, (int) body_len);
+    fail++;
+  } else if (r.adr == NULL || memcmp(r.adr, body, body_len) != 0) {
+    fprintf(stderr, "cache-selftest: disk-fallback: body mismatch\n");
+    fail++;
+  }
+  /* the loaded body must be NUL-terminated at [size] */
+  if (r.adr != NULL && r.adr[r.size] != '\0') {
+    fprintf(stderr, "cache-selftest: disk-fallback: body not NUL-terminated\n");
+    fail++;
+  }
+  if (r.adr != NULL) {
+    freet(r.adr);
+  }
+  freet(locbuf);
+  selftest_close(&cache);
+  return fail;
+}
+
+int cache_selftests(httrackp *opt, const char *dir) {
+  int failures = 0;
+  cache_back cache;
+  int i;
+
+  /* near-limit field values. The etag stresses htsblk.etag[256]; the location
+     stresses a long redirect URL. Each cached header line is read back through
+     a HTS_URLMAXSIZE-sized parse buffer ("<field>: <value>\r\n"), so the
+     round-trippable value is shorter than HTS_URLMAXSIZE: 1000 stays safely
+     under that real limit. */
+  static char etag_long[251];
+  static char location_long[1001];
+
+  /* a body with embedded NUL and high bytes, to prove binary safety */
+  static const char binary_body[] = {
+      'P',  'N',  'G', '\0', '\r', '\n',        (char) 0xFF, (char) 0x80,
+      '\0', '\0', 'e', 'n',  'd',  (char) 0xCA, (char) 0xFE, '\n'};
+
+  /* large bodies for the compression pass; kept alive across the write and
+     read passes so the read can compare against them */
+  static const size_t large_size[] = {200000, 200000, 50000};
+  const int large_count = (int) (sizeof(large_size) / sizeof(large_size[0]));
+  char *large_body[3];
+
+  /* edge-case bodies, named so store and read assert the exact same bytes */
+  const char *const body_index = "<html><body>hello</body></html>";
+  const char *const body_api = "{\"k\":\"v\"}";
+  const char *const body_updated = "<html><body>UPDATED CONTENT</body></html>";
+  const char *const body_404 = "<html><body>404 Not Found</body></html>";
+
+  memset(etag_long, 'E', sizeof(etag_long) - 1);
+  etag_long[sizeof(etag_long) - 1] = '\0';
+  memset(location_long, 'L', sizeof(location_long) - 1);
+  location_long[sizeof(location_long) - 1] = '\0';
+
+  for (i = 0; i < large_count; i++) {
+    large_body[i] = malloct(large_size[i]);
+    gen_body(large_body[i], large_size[i], i);
+  }
+
+  /* set up an isolated cache directory */
+  {
+    char base[HTS_URLMAXSIZE];
+
+    strcpybuff(base, dir);
+    if (base[0] != '\0' && base[strlen(base) - 1] != '/') {
+      strcatbuff(base, "/");
+    }
+    StringCopy(opt->path_log, base);
+    /* the disk-fallback pass resolves on-disk body paths through fconv(), which
+       is rooted at path_html; keep it inside the test directory too */
+    StringCopy(opt->path_html, base);
+    StringCopy(opt->path_html_utf8, base);
+  }
+  opt->cache = 1;
+
+  /* pass 1: create everything in a single write session */
+  selftest_open_for_write(&cache, opt);
+
+  /* edge cases (cdispo "" except where noted): normal HTML page */
+  store_entry(opt, &cache, "example.com", "/", "example.com/index.html", 200,
+              "OK", "text/html", "utf-8", "Mon, 01 Jan 2024 00:00:00 GMT",
+              "etag-normal", "", "", body_index, strlen(body_index));
+  /* redirect: empty body, empty optional fields, near-limit location */
+  store_entry(opt, &cache, "example.com", "/moved", "example.com/moved.html",
+              301, "Moved Permanently", "text/html", "", "", "", location_long,
+              "", NULL, 0);
+  /* non-HTML content-type, near-limit etag */
+  store_entry(opt, &cache, "example.com", "/api", "example.com/api.json", 200,
+              "OK", "application/json", "utf-8",
+              "Tue, 02 Jan 2024 12:00:00 GMT", etag_long, "", "", body_api,
+              strlen(body_api));
+  /* binary body, with a Content-Disposition */
+  store_entry(opt, &cache, "example.com", "/logo", "example.com/logo.png", 200,
+              "OK", "image/png", "", "", "etag-bin", "",
+              "attachment; filename=\"logo.png\"", binary_body,
+              sizeof(binary_body));
+  /* error status with a body and a location */
+  store_entry(opt, &cache, "example.com", "/gone", "example.com/gone.html", 404,
+              "Not Found", "text/html", "utf-8", "", "etag-404",
+              "https://example.com/where-it-went", "", body_404,
+              strlen(body_404));
+
+  /* scale: a few thousand small entries */
+  for (i = 0; i < SELFTEST_VOLUME; i++) {
+    char fil[64], save[128], body[64];
+
+    sprintf(fil, "/v/%05d", i);
+    sprintf(save, "example.com/v/%05d.html", i);
+    sprintf(body, "<html>volume entry %d</html>", i);
+    store_entry(opt, &cache, "example.com", fil, save, 200, "OK", "text/html",
+                "utf-8", "", "", "", "", body, strlen(body));
+  }
+
+  /* compression: a few large bodies */
+  for (i = 0; i < large_count; i++) {
+    char fil[64], save[128];
+
+    sprintf(fil, "/big/%d.bin", i);
+    sprintf(save, "example.com/big/%d.bin", i);
+    store_entry(opt, &cache, "example.com", fil, save, 200, "OK",
+                "application/octet-stream", "", "", "", "", "", large_body[i],
+                large_size[i]);
+  }
+
+  selftest_close(&cache);
+
+  /* pass 2: read back and verify everything round-tripped */
+  selftest_open_for_read(&cache, opt);
+
+  failures +=
+      check_entry(opt, &cache, "example.com", "/", 200, "OK", "text/html",
+                  "utf-8", "Mon, 01 Jan 2024 00:00:00 GMT", "etag-normal", "",
+                  "", body_index, strlen(body_index));
+  failures += check_entry(opt, &cache, "example.com", "/moved", 301,
+                          "Moved Permanently", "text/html", "", "", "",
+                          location_long, "", NULL, 0);
+  failures +=
+      check_entry(opt, &cache, "example.com", "/api", 200, "OK",
+                  "application/json", "utf-8", "Tue, 02 Jan 2024 12:00:00 GMT",
+                  etag_long, "", "", body_api, strlen(body_api));
+  failures +=
+      check_entry(opt, &cache, "example.com", "/logo", 200, "OK", "image/png",
+                  "", "", "etag-bin", "", "attachment; filename=\"logo.png\"",
+                  binary_body, sizeof(binary_body));
+  failures += check_entry(opt, &cache, "example.com", "/gone", 404, "Not Found",
+                          "text/html", "utf-8", "", "etag-404",
+                          "https://example.com/where-it-went", "", body_404,
+                          strlen(body_404));
+
+  for (i = 0; i < SELFTEST_VOLUME; i++) {
+    char fil[64], body[64];
+
+    sprintf(fil, "/v/%05d", i);
+    sprintf(body, "<html>volume entry %d</html>", i);
+    failures +=
+        check_entry(opt, &cache, "example.com", fil, 200, "OK", "text/html",
+                    "utf-8", "", "", "", "", body, strlen(body));
+  }
+
+  for (i = 0; i < large_count; i++) {
+    char fil[64];
+
+    sprintf(fil, "/big/%d.bin", i);
+    failures += check_entry(opt, &cache, "example.com", fil, 200, "OK",
+                            "application/octet-stream", "", "", "", "", "",
+                            large_body[i], large_size[i]);
+  }
+
+  selftest_close(&cache);
+
+  /* pass 3: update one edge entry with new body and headers */
+  selftest_open_for_write(&cache, opt);
+  store_entry(opt, &cache, "example.com", "/", "example.com/index.html", 200,
+              "OK", "text/html", "iso-8859-1", "Wed, 03 Jan 2024 09:30:00 GMT",
+              "etag-updated", "", "", body_updated, strlen(body_updated));
+  selftest_close(&cache);
+
+  /* pass 4: re-read and confirm the updated value, not the old one */
+  selftest_open_for_read(&cache, opt);
+  failures +=
+      check_entry(opt, &cache, "example.com", "/", 200, "OK", "text/html",
+                  "iso-8859-1", "Wed, 03 Jan 2024 09:30:00 GMT", "etag-updated",
+                  "", "", body_updated, strlen(body_updated));
+  selftest_close(&cache);
+
+  /* pass 5: the disk-fallback read path (X-In-Cache: 0, body on disk) */
+  failures += disk_fallback_selftest(opt);
+
+  for (i = 0; i < large_count; i++) {
+    freet(large_body[i]);
+  }
+
+  return failures;
+}
+
+/* Golden fixture: a small frozen cache read back to guard the read path and ZIP
+   format. The table is the contract; tests/fixtures/cache-golden/.../new.zip is
+   a witness written once via `httrack -#B <dir> regen`. Bodies stay in the ZIP
+   (all_in_cache=1), so a read needs only new.zip -- fully portable. */
+
+/* embedded NUL + high bytes: the binary-safe read path */
+static const char golden_binary[] = {
+    'P',  'N',  'G', '\0', '\r', '\n',        (char) 0xFF, (char) 0x80,
+    '\0', '\0', 'e', 'n',  'd',  (char) 0xCA, (char) 0xFE, '\n'};
+
+typedef struct {
+  const char *adr, *fil, *save, *msg, *contenttype, *charset, *lastmodified,
+      *etag, *location, *cdispo, *body;
+  size_t body_len;
+  int statuscode;
+} golden_entry;
+
+/* string-literal body + length (drops the terminator); the binary array passes
+   its length explicitly, every byte counts */
+#define GBODY(s) (s), (sizeof(s) - 1)
+
+static const golden_entry golden_entries[] = {
+    /* normal HTML page */
+    {"example.com", "/", "example.com/index.html", "OK", "text/html", "utf-8",
+     "Mon, 01 Jan 2024 00:00:00 GMT", "etag-normal", "", "",
+     GBODY("<html><body>hello</body></html>"), 200},
+    /* redirect: empty body and optionals, a Location */
+    {"example.com", "/moved", "example.com/moved.html", "Moved Permanently",
+     "text/html", "", "", "", "https://example.com/new-home", "", NULL, 0, 301},
+    /* non-HTML content */
+    {"example.com", "/api", "example.com/api.json", "OK", "application/json",
+     "utf-8", "Tue, 02 Jan 2024 12:00:00 GMT", "etag-api", "", "",
+     GBODY("{\"k\":\"v\"}"), 200},
+    /* binary body with a Content-Disposition */
+    {"example.com", "/logo", "example.com/logo.png", "OK", "image/png", "", "",
+     "etag-bin", "", "attachment; filename=\"logo.png\"", golden_binary,
+     sizeof(golden_binary), 200},
+    /* error status with a body and a Location */
+    {"example.com", "/gone", "example.com/gone.html", "Not Found", "text/html",
+     "utf-8", "", "etag-404", "https://example.com/where-it-went", "",
+     GBODY("<html><body>404 Not Found</body></html>"), 404},
+};
+
+#define GOLDEN_COUNT (sizeof(golden_entries) / sizeof(golden_entries[0]))
+
+static void golden_setup(httrackp *opt, const char *dir) {
+  char base[HTS_URLMAXSIZE];
+
+  strcpybuff(base, dir);
+  if (base[0] != '\0' && base[strlen(base) - 1] != '/') {
+    strcatbuff(base, "/");
+  }
+  StringCopy(opt->path_log, base);
+  StringCopy(opt->path_html, base);
+  StringCopy(opt->path_html_utf8, base);
+  opt->cache = 1;
+}
+
+int cache_golden_selftest(httrackp *opt, const char *dir, int regen) {
+  int failures = 0;
+  size_t k;
+  cache_back cache;
+
+  selftest_tag = "cache-golden";
+  golden_setup(opt, dir);
+
+  /* regen rewrites the fixture from the table; the test never passes it, so the
+     read pass verifies bytes a previous build froze */
+  if (regen) {
+    selftest_open_for_write(&cache, opt);
+    for (k = 0; k < GOLDEN_COUNT; k++) {
+      const golden_entry *e = &golden_entries[k];
+
+      store_entry(opt, &cache, e->adr, e->fil, e->save, e->statuscode, e->msg,
+                  e->contenttype, e->charset, e->lastmodified, e->etag,
+                  e->location, e->cdispo, e->body, e->body_len);
+    }
+    selftest_close(&cache);
+  }
+
+  selftest_open_for_read(&cache, opt);
+  for (k = 0; k < GOLDEN_COUNT; k++) {
+    const golden_entry *e = &golden_entries[k];
+
+    failures +=
+        check_entry(opt, &cache, e->adr, e->fil, e->statuscode, e->msg,
+                    e->contenttype, e->charset, e->lastmodified, e->etag,
+                    e->location, e->cdispo, e->body, e->body_len);
+  }
+  selftest_close(&cache);
+
+  return failures;
+}

src/htscache_selftest.h

@@ -0,0 +1,57 @@
+/* ------------------------------------------------------------ */
+/*
+HTTrack Website Copier, Offline Browser for Windows and Unix
+Copyright (C) 2026 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
+
+Please visit our Website: http://www.httrack.com
+*/
+
+/* ------------------------------------------------------------ */
+/* File: htscache_selftest.h                                    */
+/* Author: Xavier Roche                                         */
+/* ------------------------------------------------------------ */
+
+#ifndef HTSCACHE_SELFTEST_DEFH
+#define HTSCACHE_SELFTEST_DEFH
+
+#ifdef HTS_INTERNAL_BYTECODE
+
+#ifndef HTS_DEF_FWSTRUCT_httrackp
+#define HTS_DEF_FWSTRUCT_httrackp
+typedef struct httrackp httrackp;
+#endif
+
+/* Run the cache create/read/update self-test against a working directory.
+   Returns the number of failed checks (0 == success). */
+int cache_selftests(httrackp *opt, const char *dir);
+
+/* Read a committed (frozen) cache fixture under <dir>/hts-cache/new.zip and
+   assert a fixed set of entries decodes field- and byte-exact. Unlike
+   cache_selftests (write-then-read with the same build, a round-trip), this
+   reads bytes an earlier build froze, so it catches read-path / format drift.
+   regen!=0 first rewrites the fixture from the same table (to regenerate the
+   committed file, never by the test). Returns the failed-check count. */
+int cache_golden_selftest(httrackp *opt, const char *dir, int regen);
+
+#endif
+
+#endif

src/htscatchurl.c

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */
@@ -201,8 +201,8 @@ HTSEXT_API int catch_url(T_SOC soc, char *url, char *method, char *data) {
             while(strnotempty(line)) {
               socinput(soc, line, 1000);
               treathead(NULL, NULL, NULL, &blkretour, line);    // traiter
-              strcatbuff(data, line);
-              strcatbuff(data, "\r\n");
+              strlcatbuff(data, line, CATCH_URL_DATA_SIZE);
+              strlcatbuff(data, "\r\n", CATCH_URL_DATA_SIZE);
             }
             // CR/LF final de l'en tête inutile car déja placé via la ligne vide juste au dessus
             //strcatbuff(data,"\r\n");

src/htscatchurl.h

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */
@@ -40,6 +40,9 @@ Please visit our Website: http://www.httrack.com
 /* Library internal definictions */
 #ifdef HTS_INTERNAL_BYTECODE
 
+// Capacity contract for the catch_url() 'data' buffer (32 Kb).
+#define CATCH_URL_DATA_SIZE 32768
+
 // Fonctions
 void socinput(T_SOC soc, char *s, int max);
 

src/htscharset.c

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */

src/htscharset.h

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */

src/htsconcat.c

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2013 Xavier Roche and other contributors
+Copyright (C) 2014 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */

src/htsconfig.h

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */

src/htscore.c

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */
@@ -633,13 +633,12 @@ int httpmirror(char *url1, httrackp * opt) {
     // c'est plus propre et plus logique que d'entrer à la main les liens dans la pile
     // on bénéficie ainsi des vérifications et des tests du robot pour les liens "primaires"
     primary = (char *) malloct(primary_len);
-    if (primary) {
-      primary[0] = '\0';
-    } else {
+    if (!primary) {
       printf("PANIC! : Not enough memory [%d]\n", __LINE__);
       XH_extuninit;
       return 0;
     }
+    htsbuff primarybuff = htsbuff_ptr(primary, primary_len);
 
     while(*a) {
       int i;
@@ -687,11 +686,11 @@ int httpmirror(char *url1, httrackp * opt) {
               strcatbuff(tempo, "*");   // ajouter un *
             }
           }
-          if (type)
-            strcpybuff(filters[filptr], "+");
-          else
-            strcpybuff(filters[filptr], "-");
-          strcatbuff(filters[filptr], tempo);
+          {
+            htsbuff fb = htsbuff_ptr(filters[filptr], HTS_URLMAXSIZE * 2);
+            htsbuff_cpy(&fb, type ? "+" : "-");
+            htsbuff_cat(&fb, tempo);
+          }
           filptr++;
 
           /* sanity check */
@@ -726,12 +725,10 @@ int httpmirror(char *url1, httrackp * opt) {
         }
         url[i++] = '\0';
 
-        //strcatbuff(primary,"<PRIMARY=\"");
         if (strstr(url, ":/") == NULL)
-          strcatbuff(primary, "http://");
-        strcatbuff(primary, url);
-        //strcatbuff(primary,"\">");
-        strcatbuff(primary, "\n");
+          htsbuff_cat(&primarybuff, "http://");
+        htsbuff_cat(&primarybuff, url);
+        htsbuff_cat(&primarybuff, "\n");
       }
     }                           // while
 
@@ -762,7 +759,6 @@ int httpmirror(char *url1, httrackp * opt) {
         int filelist_ptr = 0;
         int n = 0;
         char BIGSTK line[HTS_URLMAXSIZE * 2];
-        char *primary_ptr = primary + strlen(primary);
 
         while(filelist_ptr < filelist_sz) {
           int count =
@@ -771,13 +767,10 @@ int httpmirror(char *url1, httrackp * opt) {
           if (count && line[0]) {
             n++;
             if (strstr(line, ":/") == NULL) {
-              strcpybuff(primary_ptr, "http://");
-              primary_ptr += strlen(primary_ptr);
+              htsbuff_cat(&primarybuff, "http://");
             }
-            strcpybuff(primary_ptr, line);
-            primary_ptr += strlen(primary_ptr);
-            strcpybuff(primary_ptr, "\n");
-            primary_ptr += 1;
+            htsbuff_cat(&primarybuff, line);
+            htsbuff_cat(&primarybuff, "\n");
           }
         }
         // fclose(fp);
@@ -1741,7 +1734,7 @@ int httpmirror(char *url1, httrackp * opt) {
                 {
                   char buff[256];
 
-                  guess_httptype(opt, buff, urlfil());
+                  guess_httptype_sized(opt, buff, sizeof(buff), urlfil());
                   if (strcmp(buff, "image/gif") == 0)
                     create_gif_warning = 1;
                 }
@@ -2193,16 +2186,19 @@ int httpmirror(char *url1, httrackp * opt) {
                 (OPT_GET_BUFF(opt), OPT_GET_BUFF_SIZE(opt), StringBuff(opt->path_log),
                  "hts-cache/new.lst"), "rb");
         if (new_lst != NULL && sz != (size_t) -1) {
-          char *adr = (char *) malloct(sz);
+          /* +1 for the NUL below: new.lst is read raw, and the strstr()
+             that follows needs a terminated C string. */
+          char *adr = (char *) malloct(sz + 1);
 
           if (adr) {
             if (fread(adr, 1, sz, new_lst) == sz) {
+              adr[sz] = '\0';
               char line[1100];
               int purge = 0;
 
               while(!feof(old_lst)) {
                 linput(old_lst, line, 1000);
-                if (!strstr(adr, line)) {       // fichier non trouvé dans le nouveau?
+                if (!strstr(adr, line)) { // not found in the new list?
                   char BIGSTK file[HTS_URLMAXSIZE * 2];
 
                   strcpybuff(file, StringBuff(opt->path_html));
@@ -2450,9 +2446,10 @@ void host_ban(httrackp * opt, int ptr,
   // interdire host
   assertf((*_FILTERS_PTR) < opt->maxfilter);
   if (*_FILTERS_PTR < opt->maxfilter) {
-    strcpybuff(_FILTERS[*_FILTERS_PTR], "-");
-    strcatbuff(_FILTERS[*_FILTERS_PTR], host);
-    strcatbuff(_FILTERS[*_FILTERS_PTR], "/*");  // host/ * interdit
+    htsbuff fb = htsbuff_ptr(_FILTERS[*_FILTERS_PTR], HTS_URLMAXSIZE * 2);
+    htsbuff_cpy(&fb, "-");
+    htsbuff_cat(&fb, host);
+    htsbuff_cat(&fb, "/*"); // forbid host/*
     (*_FILTERS_PTR)++;
   }
   // oups
@@ -3153,7 +3150,7 @@ static void postprocess_file(httrackp * opt, const char *save, const char *adr,
           /* CID */
           make_content_id(adr, fil, cid, sizeof(cid));
 
-          guess_httptype(opt, mimebuff, save);
+          guess_httptype_sized(opt, mimebuff, sizeof(mimebuff), save);
           fprintf(opt->state.mimefp, "--%s\r\n",
                   StringBuff(opt->state.mimemid));
           /*if (first)
@@ -3515,7 +3512,7 @@ char *next_token(char *p, int flag) {
   p--;
   do {
     p++;
-    if (flag && (*p == '\\')) { // sauter \x ou \"
+    if (flag && (*p == '\\')) { // skip \x or \"
       if (quote) {
         char c = '\0';
 
@@ -3524,20 +3521,14 @@ char *next_token(char *p, int flag) {
         else if (*(p + 1) == '"')
           c = '"';
         if (c) {
-          char BIGSTK tempo[8192];
-
-          tempo[0] = c;
-          tempo[1] = '\0';
-          strcatbuff(tempo, p + 2);
-          strcpybuff(p, tempo);
+          /* unescape the 2 chars to one, shifting left in place */
+          *p = c;
+          memmove(p + 1, p + 2, strlen(p + 2) + 1);
         }
       }
-    } else if (*p == 34) {      // guillemets (de fin)
-      char BIGSTK tempo[8192];
-
-      tempo[0] = '\0';
-      strcatbuff(tempo, p + 1);
-      strcpybuff(p, tempo);     /* wipe "" */
+    } else if (*p == 34) { // closing quote
+      /* drop the quote, shifting the rest left in place */
+      memmove(p, p + 1, strlen(p + 1) + 1);
       p--;
       /* */
       quote = !quote;
@@ -3871,13 +3862,14 @@ int htsAddLink(htsmoduleStruct * str, char *link) {
             opt->savename_83 = b;
             if (r != -1 && !forbidden_url) {
               if (savename()) {
-                if (lienrelatif(tempo, afs.save, savename()) == 0) {
+                if (lienrelatif(tempo, sizeof(tempo), afs.save, savename()) ==
+                    0) {
                   hts_log_print(opt, LOG_DEBUG,
                                 "(module): relative link at %s build with %s and %s: %s",
                                 afs.af.adr, afs.save, savename(), tempo);
                   if (str->localLink
                       && str->localLinkSize > (int) strlen(tempo) + 1) {
-                    strcpybuff(str->localLink, tempo);
+                    strlcpybuff(str->localLink, tempo, str->localLinkSize);
                   }
                 }
               }
@@ -3889,11 +3881,11 @@ int htsAddLink(htsmoduleStruct * str, char *link) {
                           lien);
             if (str->localLink
                 && str->localLinkSize > (int) (strlen(afs.af.adr) + strlen(afs.af.fil) + 8)) {
-              str->localLink[0] = '\0';
+              htsbuff lb = htsbuff_ptr(str->localLink, str->localLinkSize);
               if (!link_has_authority(afs.af.adr))
-                strcpybuff(str->localLink, "http://");
-              strcatbuff(str->localLink, afs.af.adr);
-              strcatbuff(str->localLink, afs.af.fil);
+                htsbuff_cat(&lb, "http://");
+              htsbuff_cat(&lb, afs.af.adr);
+              htsbuff_cat(&lb, afs.af.fil);
             }
             r = -1;
           }
@@ -3993,5 +3985,5 @@ void voidf(void) {
   (void) a;
 }
 
-// HTTrack Website Copier Copyright (C) 1998-2017 Xavier Roche and other contributors
+// HTTrack Website Copier Copyright (C) 1998 Xavier Roche and other contributors
 //

src/htscore.h

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */

src/htscoremain.c

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */
@@ -40,11 +40,13 @@ Please visit our Website: http://www.httrack.com
 #include "htscore.h"
 #include "htsdefines.h"
 #include "htsalias.h"
+#include "htsbauth.h"
 #include "htswrap.h"
 #include "htsmodules.h"
 #include "htszlib.h"
 #include "htscharset.h"
 #include "htsencoding.h"
+#include "htscache_selftest.h"
 #include "htsmd5.h"
 
 #include <ctype.h>
@@ -67,25 +69,6 @@ Please visit our Website: http://www.httrack.com
 /* Resolver */
 extern int IPV6_resolver;
 
-// Add a command in the argc/argv
-#define cmdl_add(token,argc,argv,buff,ptr) \
-  argv[argc]=(buff+ptr); \
-  strcpybuff(argv[argc],token); \
-  ptr += (int) (strlen(argv[argc])+2); \
-  argc++
-
-// Insert a command in the argc/argv
-#define cmdl_ins(token,argc,argv,buff,ptr) \
-  { \
-  int i; \
-  for(i=argc;i>0;i--)\
-  argv[i]=argv[i-1];\
-  } \
-  argv[0]=(buff+ptr); \
-  strcpybuff(argv[0],token); \
-  ptr += (int) (strlen(argv[0])+2); \
-  argc++
-
 #define htsmain_free() do { \
   if (url != NULL) { \
     free(url); \
@@ -138,6 +121,432 @@ static void basic_selftests(void) {
   fil_normalized(source, buffer);
   // MD5 selftests
   md5selftest();
+  // cookie_get field extraction (tab-separated, 0-based)
+  {
+    char cbuf[8192];
+
+    assertf(strcmp(cookie_get(cbuf, "a\tb\tc", 0), "a") == 0);
+    assertf(strcmp(cookie_get(cbuf, "a\tb\tc", 1), "b") == 0);
+    assertf(strcmp(cookie_get(cbuf, "a\tb\tc", 2), "c") == 0);
+    // multi-char fields catch length/boundary bugs that 1-char fields hide
+    assertf(strcmp(cookie_get(cbuf, "host\tx\t/path/to", 0), "host") == 0);
+    assertf(strcmp(cookie_get(cbuf, "host\tx\t/path/to", 2), "/path/to") == 0);
+    assertf(strcmp(cookie_get(cbuf, "a\t\tc", 1), "") == 0);  // empty field
+    assertf(strcmp(cookie_get(cbuf, "a\tb\tc", 9), "") == 0); // beyond last
+  }
+  // back_infostr() status-line formatting (no sockets: pure formatting over
+  // in-memory slots). Stresses a few thousand entries across every status-code
+  // arm. Regression for a clobber bug where the size/totalsize trailer was
+  // written straight into the destination, wiping the URL it had just built.
+  {
+    static const struct {
+      int code;
+      const char *tag;
+    } cases[] = {
+        {200, "READY "},     {-1, "ERROR "},       {-2, "TIMEOUT "},
+        {-3, "TOOSLOW "},    {400, "BADREQUEST "}, {403, "FORBIDDEN "},
+        {404, "NOT FOUND "}, {500, "SERVERROR "},  {999, "ERROR(999)"},
+    };
+    const int ncases = (int) (sizeof(cases) / sizeof(cases[0]));
+    const int n = 2000;
+    lien_back *slots = calloct(n, sizeof(lien_back));
+    char line[HTS_URLMAXSIZE * 4 + 1024];
+    char expect[HTS_URLMAXSIZE * 4 + 1024];
+    struct_back sb;
+    int idx;
+
+    sb.lnk = slots;
+    sb.count = n;
+    sb.ready = NULL;
+    sb.ready_size_bytes = 0;
+    for (idx = 0; idx < n; idx++) {
+      lien_back *const slot = &slots[idx];
+
+      slot->r.location = slot->location_buffer;
+      slot->status = STATUS_READY;
+      slot->r.statuscode = cases[idx % ncases].code;
+      slot->r.size = idx;
+      slot->r.totalsize = idx + 1;
+      snprintf(slot->url_adr, sizeof(slot->url_adr), "http://h%d.example", idx);
+      snprintf(slot->url_fil, sizeof(slot->url_fil), "/p/%d.html", idx);
+    }
+    for (idx = 0; idx < n; idx++) {
+      line[0] = '\0';
+      back_infostr(&sb, idx, 3, line, sizeof(line));
+      // Exact match (not substring): pins tag/URL/trailer order and rejects a
+      // partial clobber, duplication, or truncation that a presence check would
+      // let through. The expected format is stated here independently.
+      snprintf(expect, sizeof(expect),
+               "%s\"http://h%d.example/p/%d.html\" " LLintP " " LLintP " ",
+               cases[idx % ncases].tag, idx, idx, (LLint) idx,
+               (LLint) (idx + 1));
+      assertf(strcmp(line, expect) == 0);
+    }
+    // Near-maximal URL, driven through back_info() (which owns the status
+    // buffer internally and prints to a FILE*). url_adr + url_fil together
+    // overrun the old HTS_URLMAXSIZE*2+1024 buffer, so the bounded appends
+    // would abort unless that buffer is sized to hold both fields. Regression
+    // for that sizing -- exercising back_infostr() directly would miss it,
+    // since the caller's buffer is what matters.
+    {
+      lien_back *const slot = &slots[0];
+      const size_t adrlen = sizeof(slot->url_adr) - 8;
+      const size_t fillen = sizeof(slot->url_fil) - 8;
+      FILE *const fp = tmpfile();
+      size_t got;
+
+      assertf(fp != NULL);
+      slot->status = STATUS_READY;
+      slot->r.statuscode = 200;
+      slot->r.size = 1;
+      slot->r.totalsize = 2;
+      memset(slot->url_adr, 'a', adrlen);
+      slot->url_adr[adrlen] = '\0';
+      slot->url_fil[0] = '/';
+      memset(slot->url_fil + 1, 'b', fillen - 1);
+      slot->url_fil[fillen] = '\0';
+      back_info(&sb, 0, 3, fp);
+      rewind(fp);
+      got = fread(line, 1, sizeof(line) - 1, fp);
+      line[got] = '\0';
+      fclose(fp);
+      snprintf(expect, sizeof(expect),
+               "READY \"%s%s\" " LLintP " " LLintP " " LF, slot->url_adr,
+               slot->url_fil, (LLint) 1, (LLint) 2);
+      assertf(strcmp(line, expect) == 0);
+    }
+    freet(slots);
+  }
+  // next_token(): in-place token scanner. Strips surrounding quotes, unescapes
+  // \" and \\ when flag is set, and returns the token terminator (the space, or
+  // NULL at end of string). The unquote/unescape rewrites the string in place
+  // by shifting left, so the result is always shorter -- regression for that
+  // compaction.
+  {
+    char tok[64];
+
+    // plain token: unchanged, returns a pointer AT the separating space (exact
+    // position, not just any space -- a strchr-style impl would land elsewhere
+    // once quotes shift the content)
+    strcpybuff(tok, "abc def");
+    {
+      char *const end = next_token(tok, 0);
+      assertf(end == tok + 3 && *end == ' ' && strcmp(tok, "abc def") == 0);
+    }
+    // surrounding quotes stripped, returns the (post-shift) trailing space
+    strcpybuff(tok, "\"ab\" cd");
+    {
+      char *const end = next_token(tok, 1);
+      assertf(end == tok + 2 && *end == ' ' && strcmp(tok, "ab cd") == 0);
+    }
+    // a space inside quotes does not end the token; end of string returns NULL
+    strcpybuff(tok, "\"a b\"c");
+    {
+      char *const end = next_token(tok, 1);
+      assertf(end == NULL && strcmp(tok, "a bc") == 0);
+    }
+    // \" and \\ are unescaped to literal " and \ in place
+    strcpybuff(tok, "\"a\\\"b\\\\c\"");
+    {
+      char *const end = next_token(tok, 1);
+      assertf(end == NULL && strcmp(tok, "a\"b\\c") == 0);
+    }
+    // unterminated quote: the opening quote is dropped, the rest survives, and
+    // the scan runs to the NUL (returns NULL)
+    strcpybuff(tok, "\"ab");
+    {
+      char *const end = next_token(tok, 1);
+      assertf(end == NULL && strcmp(tok, "ab") == 0);
+    }
+    // trailing lone backslash in a quote: *(p+1) is the NUL, not an escape, so
+    // the backslash is kept intact (and there is no over-read past the NUL)
+    strcpybuff(tok, "\"a\\");
+    {
+      char *const end = next_token(tok, 1);
+      assertf(end == NULL && strcmp(tok, "a\\") == 0);
+    }
+  }
+  // fil_normalized(): canonicalizes a URL path. Query arguments are sorted
+  // alphabetically (by the text after each '?'/'&') and the query is rebuilt
+  // through a bounded builder; outside the query, "//" collapses to "/".
+  // Regression for that builder.
+  {
+    char norm[256];
+
+    assertf(strcmp(fil_normalized("/p?b=2&a=1&c=3", norm), "/p?a=1&b=2&c=3") ==
+            0);
+    assertf(strcmp(fil_normalized("/a//b", norm), "/a/b") == 0);
+    // "//" is collapsed only before the query; inside the query it is kept
+    assertf(strcmp(fil_normalized("/a//b?x=c//d", norm), "/a/b?x=c//d") == 0);
+  }
+  // give_mimext(): mime type -> file extension, bounded into the caller buffer.
+  // Returns 1 when an extension was written, 0 otherwise.
+  {
+    char ext[16];
+
+    assertf(give_mimext(ext, sizeof(ext), "image/gif") == 1);
+    assertf(strcmp(ext, "gif") == 0);
+    assertf(give_mimext(ext, sizeof(ext), "text/html") == 1);
+    assertf(strcmp(ext, "html") == 0);
+    assertf(give_mimext(ext, sizeof(ext), "no/such-mime-type") == 0);
+    assertf(ext[0] == '\0');
+  }
+  // convtolower(): lower-cases into the caller buffer (bounded by its size).
+  {
+    char low[64];
+
+    assertf(strcmp(convtolower(low, sizeof(low), "ABC/Def.HTML"),
+                   "abc/def.html") == 0);
+  }
+  // cut_path(): splits a path into directory (with trailing '/') and basename,
+  // each bounded by its buffer size.
+  {
+    char path[256];
+    char pname[256];
+
+    {
+      char full[] = "/dir/sub/file.html";
+
+      cut_path(full, path, sizeof(path), pname, sizeof(pname));
+      assertf(strcmp(path, "/dir/sub/") == 0);
+      assertf(strcmp(pname, "file.html") == 0);
+    }
+    { // a trailing slash is trimmed before the split
+      char full[] = "/dir/sub/";
+
+      cut_path(full, path, sizeof(path), pname, sizeof(pname));
+      assertf(strcmp(path, "/dir/") == 0);
+      assertf(strcmp(pname, "sub") == 0);
+    }
+    { // a path of length <= 1 yields empty results
+      char full[] = "/";
+
+      cut_path(full, path, sizeof(path), pname, sizeof(pname));
+      assertf(path[0] == '\0' && pname[0] == '\0');
+    }
+  }
+  // get_httptype_sized(): a long MIME type (Office OOXML reaches 73 chars) is
+  // written whole into a contenttype-sized buffer; returns 1 on a match, 0 when
+  // flag==0 and nothing matched. Regression for the old contenttype[64]
+  // overflow.
+  {
+    httrackp *opt = hts_create_opt();
+    htsblk r; // write into the real struct field, not a stand-in
+
+    assertf(opt != NULL);
+    // a long MIME (Office OOXML reaches 73 chars) must fit htsblk.contenttype
+    // whole: a [64] field would make this bounded copy abort.
+    assertf(get_httptype_sized(opt, r.contenttype, sizeof(r.contenttype),
+                               "deck.pptx", 0) == 1);
+    assertf(strcmp(r.contenttype,
+                   "application/vnd.openxmlformats-officedocument."
+                   "presentationml.presentation") == 0);
+    assertf(get_httptype_sized(opt, r.contenttype, sizeof(r.contenttype),
+                               "x.gif", 0) == 1);
+    assertf(strcmp(r.contenttype, "image/gif") == 0);
+    // no extension and flag==0: nothing written, returns 0
+    assertf(get_httptype_sized(opt, r.contenttype, sizeof(r.contenttype),
+                               "noextfile", 0) == 0);
+    assertf(r.contenttype[0] == '\0');
+    // no extension and flag==1: octet-stream fallback, returns 1
+    assertf(get_httptype_sized(opt, r.contenttype, sizeof(r.contenttype),
+                               "noextfile", 1) == 1);
+    assertf(strcmp(r.contenttype, "application/octet-stream") == 0);
+    // a user --assume rule with an empty value matches but writes nothing:
+    // get_userhttptype returns 1 with the buffer empty, so get_httptype_sized
+    // must still report 0 (callers test the return like the old
+    // strnotempty(s)).
+    StringCopy(opt->mimedefs, "\ncgi=\n");
+    assertf(get_httptype_sized(opt, r.contenttype, sizeof(r.contenttype),
+                               "/x.cgi", 0) == 0);
+    assertf(r.contenttype[0] == '\0');
+    StringCopy(opt->mimedefs, "\ncgi=text/html\n");
+    assertf(get_httptype_sized(opt, r.contenttype, sizeof(r.contenttype),
+                               "/x.cgi", 0) == 1);
+    assertf(strcmp(r.contenttype, "text/html") == 0);
+    hts_free_opt(opt);
+  }
+  // adr_normalized_sized(): bounded host normalization (passthrough when
+  // already normal).
+  {
+    char n[HTS_URLMAXSIZE];
+
+    assertf(strcmp(adr_normalized_sized("example.com", n, sizeof(n)),
+                   "example.com") == 0);
+  }
+  // standard_name(): builds "<name><md5?>.<ext>" into a bounded buffer. The md5
+  // is appended (4 chars) only when the URL has a query string (see url_md5),
+  // so test both; pin the structure (name + ext, lengths), not the md5 chars.
+  {
+    char b[HTS_URLMAXSIZE * 2];
+    const char *nom = "index.html"; // name part
+    const char *dot = nom + 5;      // points at ".html"
+    size_t len;
+
+    // no query -> no md5: "index" + ".html"
+    standard_name(b, sizeof(b), dot, nom, "http://example.com/index.html", 0);
+    assertf(strcmp(b, "index.html") == 0);
+    // query -> 4 md5 chars between name and ext: "index" + md5(4) + ".html"
+    standard_name(b, sizeof(b), dot, nom, "http://example.com/index.html?v=1",
+                  0);
+    len = strlen(b);
+    assertf(len == 5 + 4 + 5);
+    assertf(strncmp(b, "index", 5) == 0);
+    assertf(strcmp(b + len - 5, ".html") == 0);
+    // short names: name kept (<=8), the extension is clamped to 3 -> ".htm"
+    standard_name(b, sizeof(b), dot, nom, "http://example.com/index.html?v=1",
+                  1);
+    len = strlen(b);
+    assertf(len == 5 + 4 + 4);
+    assertf(strcmp(b + len - 4, ".htm") == 0);
+    // short names with a >8-char name: the name is clamped to 8 ("indexpag")
+    {
+      const char *lnom = "indexpage.html";
+      const char *ldot = lnom + 9; // points at ".html"
+
+      standard_name(b, sizeof(b), ldot, lnom,
+                    "http://example.com/indexpage.html?v=1", 1);
+      len = strlen(b);
+      assertf(len == 8 + 4 + 4);
+      assertf(strncmp(b, "indexpag", 8) == 0);
+      assertf(strcmp(b + len - 4, ".htm") == 0);
+    }
+  }
+  // longfile_to_83(): single-name 8-3 (mode 1) / ISO9660 (mode 2) conversion;
+  // uppercases, clamps the name (8 / 31) and the extension (3). It rewrites
+  // 'save' in place, so pass a mutable array.
+  {
+    char n83[256];
+
+    {
+      char save[] = "longfilename.html";
+
+      longfile_to_83(1, n83, sizeof(n83), save); // 8-3: name->8, ext->3
+      assertf(strcmp(n83, "LONGFILE.HTM") == 0);
+    }
+    {
+      char save[] = "longfilename.html";
+
+      longfile_to_83(2, n83, sizeof(n83), save); // ISO9660: name->31, ext->3
+      assertf(strcmp(n83, "LONGFILENAME.HTM") == 0);
+    }
+    { // sanitization: leading '.'->'_', interior dots
+      char save[] = ".a b.c.d e"; // collapse to '_', spaces/specials -> '_'
+                                  // (only the last dot stays as the separator)
+      longfile_to_83(1, n83, sizeof(n83), save);
+      assertf(strcmp(n83, "_A_B_C.D_E") == 0);
+    }
+  }
+  // long_to_83(): per-segment 8-3 conversion of a whole path.
+  {
+    char n83[HTS_URLMAXSIZE * 2];
+    char save[] = "dir/longfilename.html";
+
+    long_to_83(1, n83, sizeof(n83), save);
+    assertf(strcmp(n83, "DIR/LONGFILE.HTM") == 0);
+  }
+  // lienrelatif(): relative path from the directory of curr_fil to link.
+  {
+    char s[HTS_URLMAXSIZE * 2];
+
+    // same directory -> just the basename
+    assertf(lienrelatif(s, sizeof(s), "dir/page.html", "dir/index.html") == 0);
+    assertf(strcmp(s, "page.html") == 0);
+    // link one level up -> a "../" prefix
+    assertf(lienrelatif(s, sizeof(s), "a.html", "dir/index.html") == 0);
+    assertf(strcmp(s, "../a.html") == 0);
+  }
+}
+
+/* Self-tests for the htssafe.h bounded string ops (driven by httrack -#8).
+   Returns 0 if every bounded operation behaved correctly, 1 otherwise.
+   The abort-on-overflow guarantee is checked separately by the -#8 "overflow"
+   sub-mode (it aborts the process by design). */
+static int string_safety_selftests(void) {
+  char buf[8];
+
+  /* strcpybuff into a sized array: exact copy */
+  strcpybuff(buf, "abc");
+  if (strcmp(buf, "abc") != 0)
+    return 1;
+
+  /* strcatbuff append within capacity */
+  strcatbuff(buf, "de");
+  if (strcmp(buf, "abcde") != 0)
+    return 1;
+
+  /* strncatbuff appends at most N source chars */
+  strcpybuff(buf, "ab");
+  strncatbuff(buf, "cdef", 2);
+  if (strcmp(buf, "abcd") != 0)
+    return 1;
+
+  /* strlcpybuff: explicit-capacity copy into a pointer destination, the form
+     the migration moves toward */
+  {
+    char storage[8];
+    char *const p = storage;
+
+    strlcpybuff(p, "hello", sizeof(storage));
+    if (strcmp(p, "hello") != 0)
+      return 1;
+  }
+
+  /* strcpybuff into a pointer destination: routes through the unchecked
+     strcpybuff_ptr_ fallback (the path the -#8 warning flags). The warning is
+     intentional here; we only verify the fallback still copies correctly. */
+#if defined(__GNUC__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wattribute-warning"
+#endif
+  {
+    char storage[8];
+    char *const p = storage;
+
+    strcpybuff(p, "ptr");
+    if (strcmp(p, "ptr") != 0)
+      return 1;
+  }
+#if defined(__GNUC__)
+#pragma GCC diagnostic pop
+#endif
+
+  /* htsbuff: bounded builder over a fixed array (append, truncating append,
+     reset, and length tracking) */
+  {
+    char dst[8];
+    htsbuff b = htsbuff_array(dst);
+
+    htsbuff_cat(&b, "ab");
+    htsbuff_cat(&b, "cd");
+    if (strcmp(htsbuff_str(&b), "abcd") != 0 || b.len != 4)
+      return 1;
+
+    htsbuff_catn(&b, "efghij", 2);      /* append at most 2 */
+    if (strcmp(htsbuff_str(&b), "abcdef") != 0)
+      return 1;
+
+    htsbuff_cpy(&b, "xyz");             /* reset */
+    if (strcmp(htsbuff_str(&b), "xyz") != 0 || b.len != 3)
+      return 1;
+
+    htsbuff_catc(&b, '!'); /* single character */
+    if (strcmp(htsbuff_str(&b), "xyz!") != 0 || b.len != 4)
+      return 1;
+  }
+
+  /* boundary: filling to exactly cap-1 must succeed (one more aborts, which the
+     -#8 overflow-buff mode checks) */
+  {
+    char d2[4];
+    htsbuff c = htsbuff_array(d2);
+
+    htsbuff_cat(&c, "abc");
+    if (strcmp(htsbuff_str(&c), "abc") != 0 || c.len != 3)
+      return 1;
+  }
+
+  return 0;
 }
 
 static int hts_main_internal(int argc, char **argv, httrackp * opt);
@@ -164,6 +573,7 @@ HTSEXT_API int hts_main2(int argc, char **argv, httrackp * opt) {
 static int hts_main_internal(int argc, char **argv, httrackp * opt) {
   char **x_argv = NULL;         // Patch pour argv et argc: en cas de récupération de ligne de commande
   char *x_argvblk = NULL;       // (reprise ou update)
+  size_t x_argvblk_size = 0;    // total capacity of x_argvblk
   int x_ptr = 0;                // offset
 
   //
@@ -241,7 +651,8 @@ static int hts_main_internal(int argc, char **argv, httrackp * opt) {
         *a = ' ';
       /* equivalent to "empty parameter" */
       if ((strcmp(argv[na], HTS_NOPARAM) == 0) || (strcmp(argv[na], HTS_NOPARAM2) == 0))        // (none)
-        strcpybuff(argv[na], "\"\"");
+        /* replacing "(none)"/"\"(none)\"" with "\"\"" always fits in place */
+        strlcpybuff(argv[na], "\"\"", strlen(argv[na]) + 1);
       if (strncmp(argv[na], "-&", 2) == 0)
         argv[na][1] = '%';
     }
@@ -263,6 +674,7 @@ static int hts_main_internal(int argc, char **argv, httrackp * opt) {
       htsmain_free();
       return -1;
     }
+    x_argvblk_size = (size_t) (current_size + 32768);
     x_argvblk[0] = '\0';
     x_ptr = 0;
 
@@ -284,7 +696,7 @@ static int hts_main_internal(int argc, char **argv, httrackp * opt) {
     //
     argv_url = 0;               /* pour comptage */
     //
-    cmdl_add(argv[0], x_argc, x_argv, x_argvblk, x_ptr);
+    cmdl_add(argv[0], x_argc, x_argv, x_argvblk, x_argvblk_size, x_ptr);
     na = 1;                     /* commencer après nom_prg */
     while(na < argc) {
       int result = 1;
@@ -294,10 +706,10 @@ static int hts_main_internal(int argc, char **argv, httrackp * opt) {
       /* Vérifier argv[] non vide */
       if (strnotempty(argv[na])) {
 
-        /* Vérifier Commande (alias) */
-        result =
-          optalias_check(argc, (const char *const *) argv, na, &tmp_argc,
-                         (char **) tmp_argv, tmp_error);
+        /* Resolve an option alias, if any */
+        result = optalias_check(argc, (const char *const *) argv, na, &tmp_argc,
+                                (char **) tmp_argv, sizeof(_tmp_argv[0]),
+                                tmp_error, sizeof(tmp_error));
         if (!result) {
           HTS_PANIC_PRINTF(tmp_error);
           htsmain_free();
@@ -305,9 +717,10 @@ static int hts_main_internal(int argc, char **argv, httrackp * opt) {
         }
 
         /* Copier */
-        cmdl_add(tmp_argv[0], x_argc, x_argv, x_argvblk, x_ptr);
+        cmdl_add(tmp_argv[0], x_argc, x_argv, x_argvblk, x_argvblk_size, x_ptr);
         if (tmp_argc > 1) {
-          cmdl_add(tmp_argv[1], x_argc, x_argv, x_argvblk, x_ptr);
+          cmdl_add(tmp_argv[1], x_argc, x_argv, x_argvblk, x_argvblk_size,
+                   x_ptr);
         }
 
         /* Compter URLs et détecter -i,-q.. */
@@ -379,7 +792,7 @@ static int hts_main_internal(int argc, char **argv, httrackp * opt) {
           char BIGSTK tempo[HTS_CDLMAXSIZE];
 
           strcpybuff(tempo, argv[na] + 1);
-          if (tempo[strlen(tempo) - 1] != '"') {
+          if (tempo[0] == '\0' || tempo[strlen(tempo) - 1] != '"') {
             char BIGSTK s[HTS_CDLMAXSIZE];
 
             sprintf(s, "Missing quote in %s", argv[na]);
@@ -388,7 +801,9 @@ static int hts_main_internal(int argc, char **argv, httrackp * opt) {
             return -1;
           }
           tempo[strlen(tempo) - 1] = '\0';
-          strcpybuff(argv[na], tempo);
+          /* tempo is argv[na] minus its surrounding quotes, so it fits in place
+           */
+          strlcpybuff(argv[na], tempo, strlen(argv[na]) + 1);
         }
 
         if (cmdl_opt(argv[na])) {       // option
@@ -489,18 +904,19 @@ static int hts_main_internal(int argc, char **argv, httrackp * opt) {
               (OPT_GET_BUFF(opt), OPT_GET_BUFF_SIZE(opt),
               StringBuff(opt->path_log),
                "hts-cache/doit.log"))) || (argv_url > 0)) {
-          if (!optinclude_file
-              (fconcat
-               (OPT_GET_BUFF(opt), OPT_GET_BUFF_SIZE(opt),
-               StringBuff(opt->path_log), HTS_HTTRACKRC),
-               &argc, argv, x_argvblk, &x_ptr))
-            if (!optinclude_file(HTS_HTTRACKRC, &argc, argv, x_argvblk, &x_ptr)) {
-              if (!optinclude_file
-                  (fconcat(OPT_GET_BUFF(opt), OPT_GET_BUFF_SIZE(opt),
-                  hts_gethome(), "/" HTS_HTTRACKRC),
-                   &argc, argv, x_argvblk, &x_ptr)) {
+          if (!optinclude_file(
+                  fconcat(OPT_GET_BUFF(opt), OPT_GET_BUFF_SIZE(opt),
+                          StringBuff(opt->path_log), HTS_HTTRACKRC),
+                  &argc, argv, x_argvblk, x_argvblk_size, &x_ptr))
+            if (!optinclude_file(HTS_HTTRACKRC, &argc, argv, x_argvblk,
+                                 x_argvblk_size, &x_ptr)) {
+              if (!optinclude_file(
+                      fconcat(OPT_GET_BUFF(opt), OPT_GET_BUFF_SIZE(opt),
+                              hts_gethome(), "/" HTS_HTTRACKRC),
+                      &argc, argv, x_argvblk, x_argvblk_size, &x_ptr)) {
 #ifdef HTS_HTTRACKCNF
-                optinclude_file(HTS_HTTRACKCNF, &argc, argv, x_argvblk, &x_ptr);
+                optinclude_file(HTS_HTTRACKCNF, &argc, argv, x_argvblk,
+                                x_argvblk_size, &x_ptr);
 #endif
               }
             }
@@ -553,7 +969,7 @@ static int hts_main_internal(int argc, char **argv, httrackp * opt) {
           if (strnotempty(lastp)) {
             insert_after_argc = argc - insert_after;
             cmdl_ins(lastp, insert_after_argc, (argv + insert_after), x_argvblk,
-                     x_ptr);
+                     x_argvblk_size, x_ptr);
             argc = insert_after_argc + insert_after;
             insert_after++;
           }
@@ -673,7 +1089,7 @@ static int hts_main_internal(int argc, char **argv, httrackp * opt) {
       if (argv[i][0] == '-') {
         if (argv[i][1] == '-') {        // --xxx
           if ((strfield2(argv[i] + 2, "clean")) || (strfield2(argv[i] + 2, "tide"))) {  // nettoyer
-            strcpybuff(argv[i] + 1, "");
+            argv[i][1] = '\0';
             if (fexist
                 (fconcat
                  (OPT_GET_BUFF(opt), OPT_GET_BUFF_SIZE(opt), StringBuff(opt->path_log), "hts-log.txt")))
@@ -782,7 +1198,8 @@ static int hts_main_internal(int argc, char **argv, httrackp * opt) {
             //
           } else if (strfield2(argv[i] + 2, "catchurl")) {      // capture d'URL via proxy temporaire!
             argv_url = 1;       // forcer a passer les parametres
-            strcpybuff(argv[i] + 1, "#P");
+            /* argv[i] is "--catchurl"; "#P" fits after its first char */
+            strlcpybuff(argv[i] + 1, "#P", strlen(argv[i] + 1) + 1);
             //
           } else if (strfield2(argv[i] + 2, "updatehttrack")) {
 #ifdef _WIN32
@@ -1110,7 +1527,7 @@ static int hts_main_internal(int argc, char **argv, httrackp * opt) {
         char BIGSTK tempo[HTS_CDLMAXSIZE + 256];
 
         strcpybuff(tempo, argv[na] + 1);
-        if (tempo[strlen(tempo) - 1] != '"') {
+        if (tempo[0] == '\0' || tempo[strlen(tempo) - 1] != '"') {
           char s[HTS_CDLMAXSIZE + 256];
 
           sprintf(s, "Missing quote in %s", argv[na]);
@@ -1119,7 +1536,9 @@ static int hts_main_internal(int argc, char **argv, httrackp * opt) {
           return -1;
         }
         tempo[strlen(tempo) - 1] = '\0';
-        strcpybuff(argv[na], tempo);
+        /* tempo is argv[na] minus its surrounding quotes, so it fits in place
+         */
+        strlcpybuff(argv[na], tempo, strlen(argv[na]) + 1);
       }
 
       if (cmdl_opt(argv[na])) { // option
@@ -1787,10 +2206,6 @@ static int hts_main_internal(int argc, char **argv, httrackp * opt) {
                     HTS_PANIC_PRINTF("Empty string given");
                     htsmain_free();
                     return -1;
-                  } else if (strlen(argv[na]) >= 256) {
-                    HTS_PANIC_PRINTF("Header line string too long");
-                    htsmain_free();
-                    return -1;
                   }
                   StringCat(opt->headers, argv[na]);
                   StringCat(opt->headers, "\r\n");  /* separator */
@@ -2012,6 +2427,35 @@ static int hts_main_internal(int argc, char **argv, httrackp * opt) {
           case '#':{           // non documenté
               com++;
               switch (*com) {
+              case 'A': // cache self-test: httrack -#A <dir>
+                if (na + 1 < argc) {
+                  const int err = cache_selftests(opt, argv[na + 1]);
+
+                  printf("cache-selftest: %s\n", err ? "FAIL" : "OK");
+                  htsmain_free();
+                  return err;
+                } else {
+                  fprintf(stderr, "Option #A requires a directory argument\n");
+                  htsmain_free();
+                  return 1;
+                }
+                break;
+              case 'B': // golden cache fixture read: httrack -#B <dir> [regen]
+                if (na + 1 < argc) {
+                  const int regen =
+                      (na + 2 < argc && strcmp(argv[na + 2], "regen") == 0);
+                  const int err =
+                      cache_golden_selftest(opt, argv[na + 1], regen);
+
+                  printf("cache-golden: %s\n", err ? "FAIL" : "OK");
+                  htsmain_free();
+                  return err;
+                } else {
+                  fprintf(stderr, "Option #B requires a directory argument\n");
+                  htsmain_free();
+                  return 1;
+                }
+                break;
               case 'C':        // list cache files : httrack -#C '*spid*.gif' will attempt to find the matching file
                 {
                   int hasFilter = 0;
@@ -2054,8 +2498,8 @@ static int hts_main_internal(int argc, char **argv, httrackp * opt) {
                       char firstline[256];
                       char *a = cacheNdx;
 
-                      a += cache_brstr(a, firstline);
-                      a += cache_brstr(a, firstline);
+                      a += cache_brstr(a, firstline, sizeof(firstline));
+                      a += cache_brstr(a, firstline, sizeof(firstline));
                       while(a != NULL) {
                         a = strchr(a + 1, '\n');        /* start of line */
                         if (a) {
@@ -2351,15 +2795,12 @@ static int hts_main_internal(int argc, char **argv, httrackp * opt) {
                   // initialiser mimedefs
                   //get_userhttptype(opt,1,opt->mimedefs,NULL);
                   // check
-                  mime[0] = '\0';
-                  get_httptype(opt, mime, argv[na + 1], 0);
-                  if (mime[0] != '\0') {
+                  if (get_httptype_sized(opt, mime, sizeof(mime), argv[na + 1],
+                                         0)) {
                     char ext[256];
 
                     printf("%s is '%s'\n", argv[na + 1], mime);
-                    ext[0] = '\0';
-                    give_mimext(ext, mime);
-                    if (ext[0]) {
+                    if (give_mimext(ext, sizeof(ext), mime)) {
                       printf("and its local type is '.%s'\n", ext);
                     }
                   } else {
@@ -2441,6 +2882,35 @@ static int hts_main_internal(int argc, char **argv, httrackp * opt) {
                 htsmain_free();
                 return 0;
                 break;
+              case '8':        /* string-safety selftest: httrack -#8 [overflow <bigstr>] */
+                if (na + 1 < argc
+                    && strncmp(argv[na + 1], "overflow", 8) == 0) {
+                  /* Deliberately exceed a sized buffer: the bounded op must
+                     abort. The source comes from argv so its length is opaque
+                     to the compiler (no static -Wstringop-overflow, genuine
+                     runtime check). "overflow-buff" exercises htsbuff. */
+                  char small[4];
+                  const char *const src =
+                    (na + 2 < argc) ? argv[na + 2] : "overflowing";
+
+                  if (strcmp(argv[na + 1], "overflow-buff") == 0) {
+                    htsbuff b = htsbuff_array(small);
+
+                    htsbuff_cat(&b, src);
+                  } else {
+                    strcpybuff(small, src);
+                  }
+                  printf("strsafe: NOT aborted\n");     /* must be unreachable */
+                  htsmain_free();
+                  return 1;
+                } else {
+                  const int err = string_safety_selftests();
+
+                  printf("strsafe: %s\n", err ? "FAIL" : "OK");
+                  htsmain_free();
+                  return err;
+                }
+                break;
               case '7':  // hashtable selftest: httrack -#7 nb_entries
                 basic_selftests();
                 if (++na < argc) {
@@ -2691,11 +3161,6 @@ static int hts_main_internal(int argc, char **argv, httrackp * opt) {
               return -1;
             } else {
               na++;
-              if (strlen(argv[na]) >= 126) {
-                HTS_PANIC_PRINTF("User-agent length too long");
-                htsmain_free();
-                return -1;
-              }
               StringCopy(opt->user_agent, argv[na]);
               if (StringNotEmpty(opt->user_agent))
                 opt->user_agent_send = 1;
@@ -2748,7 +3213,7 @@ static int hts_main_internal(int argc, char **argv, httrackp * opt) {
         if (urlSize < HTS_URLMAXSIZE) {
           ensureUrlCapacity(url, url_sz, capa);
           if (strnotempty(url))
-            strcatbuff(url, " ");       // espace de séparation
+            strlcatbuff(url, " ", url_sz); // separator space
           append_escape_spc_url(unescape_http_unharm(catbuff, sizeof(catbuff), argv[na], 1), url, url_sz);
         }
       }                         // if argv=- etc. 

src/htscoremain.h

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */

src/htsdefines.h

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */

src/htsencoding.c

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 2013 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */
@@ -145,8 +145,13 @@ int hts_unescapeEntitiesWithCharset(const char *src, char *dest, const size_t ma
         if (!hex) {
           if (src[i] >= '0' && src[i] <= '9') {
             const int h = src[i] - '0';
-            uc *= 10;
-            uc += h;
+            /* Guard before multiplying: a codepoint past the Unicode max
+               (0x10FFFF) is invalid anyway, so stop rather than overflow uc. */
+            if (uc > (0x10FFFF - h) / 10) {
+              ampStart = (size_t) -1;
+            } else {
+              uc = uc * 10 + h;
+            }
           } else {
             /* abandon */
             ampStart = (size_t) -1;
@@ -156,8 +161,11 @@ int hts_unescapeEntitiesWithCharset(const char *src, char *dest, const size_t ma
         else {
           const int h = get_hex_value(src[i]);
           if (h != -1) {
-            uc *= 16;
-            uc += h;
+            if (uc > (0x10FFFF - h) / 16) {
+              ampStart = (size_t) -1;
+            } else {
+              uc = uc * 16 + h;
+            }
           } else {
             /* abandon */
             ampStart = (size_t) -1;

src/htsencoding.h

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 2013 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */

src/htsfilters.c

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */

src/htsfilters.h

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */

src/htsftp.c

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */

src/htsftp.h

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */

src/htsglobal.h

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */
@@ -197,12 +197,15 @@ Please visit our Website: http://www.httrack.com
 
 #endif
 
-/* Taille max d'une URL */
+/* Max URL length */
 #define HTS_URLMAXSIZE 1024
-/* Taille max ligne de commande (>=HTS_URLMAXSIZE*2) */
+/* Max command-line length (>=HTS_URLMAXSIZE*2) */
 #define HTS_CDLMAXSIZE 1024
+/* MIME-type buffer contract (htsblk.contenttype/charset/contentencoding); holds
+   the longest registered MIME type, the Office OOXML ones reaching 73 chars */
+#define HTS_MIMETYPE_SIZE 128
 
-/* Copyright (C) 1998-2017 Xavier Roche and other contributors */
+/* Copyright (C) 1998 Xavier Roche and other contributors */
 #define HTTRACK_AFF_AUTHORS "[XR&CO'2014]"
 #define HTS_DEFAULT_FOOTER "<!-- Mirrored from %s%s by HTTrack Website Copier/" HTTRACK_AFF_VERSION " " HTTRACK_AFF_AUTHORS ", %s -->"
 #define HTTRACK_WEB "http://www.httrack.com"
@@ -250,6 +253,22 @@ Please visit our Website: http://www.httrack.com
 #endif
 #endif
 
+/**
+ * Mark a function deprecated, with a message pointing at the replacement.
+ * Placed before the declaration so both the GCC/Clang attribute and the MSVC
+ * __declspec sit in a position both accept. Degrades to nothing elsewhere.
+ */
+#if defined(__GNUC__) &&                                                       \
+    (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5))
+#define HTS_DEPRECATED(msg) __attribute__((deprecated(msg)))
+#elif defined(__GNUC__)
+#define HTS_DEPRECATED(msg) __attribute__((deprecated))
+#elif defined(_MSC_VER) && (_MSC_VER >= 1400)
+#define HTS_DEPRECATED(msg) __declspec(deprecated(msg))
+#else
+#define HTS_DEPRECATED(msg)
+#endif
+
 #ifndef HTS_LONGLONG
 #ifdef HTS_NO_64_BIT
 #define HTS_LONGLONG 0

src/htshash.c

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */
@@ -76,7 +76,7 @@ static coucal_key key_duphandler(void *arg, coucal_key_const name) {
 /* Key sav hashes are using case-insensitive version */
 static coucal_hashkeys key_sav_hashes(void *arg, coucal_key_const key) {
   hash_struct *const hash = (hash_struct*) arg;
-  convtolower(hash->catbuff, (const char*) key);
+  convtolower(hash->catbuff, sizeof(hash->catbuff), (const char *) key);
   return coucal_hash_string(hash->catbuff);
 }
 

src/htshash.h

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */

src/htshelp.c

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */
@@ -182,7 +182,8 @@ void help_wizard(httrackp * opt) {
   printf("\n");
   printf("Welcome to HTTrack Website Copier (Offline Browser) " HTTRACK_VERSION
          "%s\n", hts_get_version_info(opt));
-  printf("Copyright (C) 1998-2017 Xavier Roche and other contributors\n");
+  printf("Copyright (C) 1998-%s Xavier Roche and other contributors\n",
+         &__DATE__[7]);
 #ifdef _WIN32
   printf("Note: You are running the commandline version,\n");
   printf("run 'WinHTTrack.exe' to get the GUI version.\n");
@@ -409,7 +410,7 @@ void help_catchurl(const char *dest_path) {
   if (soc != INVALID_SOCKET) {
     char BIGSTK url[HTS_URLMAXSIZE * 2];
     char method[32];
-    char BIGSTK data[32768];
+    char BIGSTK data[CATCH_URL_DATA_SIZE];
 
     url[0] = method[0] = data[0] = '\0';
     //
@@ -795,7 +796,10 @@ void help(const char *app, int more) {
   snprintf(info, sizeof(info), "HTTrack version " HTTRACK_VERSION "%s",
           hts_is_available());
   infomsg(info);
-  infomsg("Copyright (C) 1998-2017 Xavier Roche and other contributors");
+  snprintf(info, sizeof(info),
+           "Copyright (C) 1998-%s Xavier Roche and other contributors",
+           &__DATE__[7]);
+  infomsg(info);
 #ifdef HTS_PLATFORM_NAME
   infomsg("[compiled: " HTS_PLATFORM_NAME "]");
 #endif

src/htshelp.h

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */

src/htsindex.c

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */
@@ -334,7 +334,7 @@ void index_finish(const char *indexpath, int mode) {
     if (fp_tmpproject) {
       tab = (char **) malloct(sizeof(char *) * (hts_primindex_size + 2));
       if (tab) {
-        blk = malloct(size + 4);
+        blk = malloct(size + 1);
         if (blk) {
           fseek(fp_tmpproject, 0, SEEK_SET);
           if ((INTsys) fread(blk, 1, size, fp_tmpproject) == size) {
@@ -343,6 +343,7 @@ void index_finish(const char *indexpath, int mode) {
             int i;
             FILE *fp;
 
+            blk[size] = '\0';
             while((b = strchr(a, '\n')) && (index < hts_primindex_size)) {
               tab[index++] = a;
               *b = '\0';

src/htsindex.h

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */

src/htsjava.c

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */
@@ -472,9 +472,8 @@ static int tris(httrackp * opt, char *buffer) {
   {
     char type[256];
 
-    type[0] = '\0';
-    get_httptype(opt, type, buffer, 0);
-    if (strnotempty(type))      // type reconnu!
+    if (get_httptype_sized(opt, type, sizeof(type), buffer,
+                           0)) // recognized type
       return 1;
     // ajout RX 05/2001
     else if (is_dyntype(get_ext(catbuff, sizeof(catbuff), buffer)))      // asp,cgi...

src/htsjava.h

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */

src/htslib.c

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */
@@ -754,7 +754,8 @@ T_SOC http_xfopen(httrackp * opt, int mode, int treat, int waitconnect,
       if (soc != INVALID_SOCKET) {
         retour->statuscode = HTTP_OK;   // OK
         strcpybuff(retour->msg, "OK");
-        guess_httptype(opt, retour->contenttype, fil);
+        guess_httptype_sized(opt, retour->contenttype,
+                             sizeof(retour->contenttype), fil);
       } else if (strnotempty(retour->msg) == 0)
         strcpybuff(retour->msg, "Unable to open local file");
       return soc;               // renvoyer
@@ -878,7 +879,7 @@ int http_sendhead(httrackp * opt, t_cookie * cookie, int mode,
                   const char *xsend, const char *adr, const char *fil,
                   const char *referer_adr, const char *referer_fil,
                   htsblk * retour) {
-  char BIGSTK buffer_head_request[8192];
+  char BIGSTK buffer_head_request[16384];
   buff_struct bstr = { buffer_head_request, sizeof(buffer_head_request), 0 };
 
   //int use_11=0;     // HTTP 1.1 utilisé
@@ -1530,8 +1531,9 @@ void treathead(t_cookie * cookie, const char *adr, const char *fil, htsblk * ret
       if (retour->location) {
         while(is_realspace(*(rcvd + p)))
           p++;                  // sauter espaces
-        if ((int) strlen(rcvd + p) < HTS_URLMAXSIZE)    // pas trop long?
-          strcpybuff(retour->location, rcvd + p);
+        if ((int) strlen(rcvd + p) < HTS_URLMAXSIZE) // not too long?
+          /* location aliases location_buffer[HTS_URLMAXSIZE * 2] */
+          strlcpybuff(retour->location, rcvd + p, HTS_URLMAXSIZE * 2);
         else                    // erreur.. ignorer
           retour->location[0] = '\0';
       }
@@ -1660,138 +1662,107 @@ void treathead(t_cookie * cookie, const char *adr, const char *fil, htsblk * ret
   }
 }
 
-// transforme le message statuscode en chaîne
-HTSEXT_API void infostatuscode(char *msg, int statuscode) {
+// HTTP status code -> reason phrase (per RFC), or NULL if unknown.
+HTSEXT_API const char *infostatuscode_const(int statuscode) {
+  // O(1) dispatch (the compiler builds a jump table); the phrases are static.
   switch (statuscode) {
-    // Erreurs HTTP, selon RFC
   case 100:
-    strcpybuff(msg, "Continue");
-    break;
+    return "Continue";
   case 101:
-    strcpybuff(msg, "Switching Protocols");
-    break;
+    return "Switching Protocols";
   case 200:
-    strcpybuff(msg, "OK");
-    break;
+    return "OK";
   case 201:
-    strcpybuff(msg, "Created");
-    break;
+    return "Created";
   case 202:
-    strcpybuff(msg, "Accepted");
-    break;
+    return "Accepted";
   case 203:
-    strcpybuff(msg, "Non-Authoritative Information");
-    break;
+    return "Non-Authoritative Information";
   case 204:
-    strcpybuff(msg, "No Content");
-    break;
+    return "No Content";
   case 205:
-    strcpybuff(msg, "Reset Content");
-    break;
+    return "Reset Content";
   case 206:
-    strcpybuff(msg, "Partial Content");
-    break;
+    return "Partial Content";
   case 300:
-    strcpybuff(msg, "Multiple Choices");
-    break;
+    return "Multiple Choices";
   case 301:
-    strcpybuff(msg, "Moved Permanently");
-    break;
+    return "Moved Permanently";
   case 302:
-    strcpybuff(msg, "Moved Temporarily");
-    break;
+    return "Moved Temporarily";
   case 303:
-    strcpybuff(msg, "See Other");
-    break;
+    return "See Other";
   case 304:
-    strcpybuff(msg, "Not Modified");
-    break;
+    return "Not Modified";
   case 305:
-    strcpybuff(msg, "Use Proxy");
-    break;
+    return "Use Proxy";
   case 306:
-    strcpybuff(msg, "Undefined 306 error");
-    break;
+    return "Undefined 306 error";
   case 307:
-    strcpybuff(msg, "Temporary Redirect");
-    break;
+    return "Temporary Redirect";
   case 400:
-    strcpybuff(msg, "Bad Request");
-    break;
+    return "Bad Request";
   case 401:
-    strcpybuff(msg, "Unauthorized");
-    break;
+    return "Unauthorized";
   case 402:
-    strcpybuff(msg, "Payment Required");
-    break;
+    return "Payment Required";
   case 403:
-    strcpybuff(msg, "Forbidden");
-    break;
+    return "Forbidden";
   case 404:
-    strcpybuff(msg, "Not Found");
-    break;
+    return "Not Found";
   case 405:
-    strcpybuff(msg, "Method Not Allowed");
-    break;
+    return "Method Not Allowed";
   case 406:
-    strcpybuff(msg, "Not Acceptable");
-    break;
+    return "Not Acceptable";
   case 407:
-    strcpybuff(msg, "Proxy Authentication Required");
-    break;
+    return "Proxy Authentication Required";
   case 408:
-    strcpybuff(msg, "Request Time-out");
-    break;
+    return "Request Time-out";
   case 409:
-    strcpybuff(msg, "Conflict");
-    break;
+    return "Conflict";
   case 410:
-    strcpybuff(msg, "Gone");
-    break;
+    return "Gone";
   case 411:
-    strcpybuff(msg, "Length Required");
-    break;
+    return "Length Required";
   case 412:
-    strcpybuff(msg, "Precondition Failed");
-    break;
+    return "Precondition Failed";
   case 413:
-    strcpybuff(msg, "Request Entity Too Large");
-    break;
+    return "Request Entity Too Large";
   case 414:
-    strcpybuff(msg, "Request-URI Too Large");
-    break;
+    return "Request-URI Too Large";
   case 415:
-    strcpybuff(msg, "Unsupported Media Type");
-    break;
+    return "Unsupported Media Type";
   case 416:
-    strcpybuff(msg, "Requested Range Not Satisfiable");
-    break;
+    return "Requested Range Not Satisfiable";
   case 417:
-    strcpybuff(msg, "Expectation Failed");
-    break;
+    return "Expectation Failed";
   case 500:
-    strcpybuff(msg, "Internal Server Error");
-    break;
+    return "Internal Server Error";
   case 501:
-    strcpybuff(msg, "Not Implemented");
-    break;
+    return "Not Implemented";
   case 502:
-    strcpybuff(msg, "Bad Gateway");
-    break;
+    return "Bad Gateway";
   case 503:
-    strcpybuff(msg, "Service Unavailable");
-    break;
+    return "Service Unavailable";
   case 504:
-    strcpybuff(msg, "Gateway Time-out");
-    break;
+    return "Gateway Time-out";
   case 505:
-    strcpybuff(msg, "HTTP Version Not Supported");
-    break;
-    //
+    return "HTTP Version Not Supported";
   default:
-    if (strnotempty(msg) == 0)
-      strcpybuff(msg, "Unknown error");
-    break;
+    return NULL;
+  }
+}
+
+// Write the status code's reason phrase into msg. For an unknown code, keep any
+// caller-provided message, otherwise fall back to a default. Callers provide a
+// buffer of at least 64 bytes (the longest reason phrase is 31).
+HTSEXT_API void infostatuscode(char *msg, int statuscode) {
+  const char *const text = infostatuscode_const(statuscode);
+
+  if (text != NULL) {
+    strlcpybuff(msg, text, 64);
+  } else if (strnotempty(msg) == 0) {
+    strlcpybuff(msg, "Unknown error", 64);
   }
 }
 
@@ -3475,16 +3446,17 @@ HTSEXT_API char *fil_normalized(const char *source, char *dest) {
     /* Replace query by sorted query */
     copyBuff = malloct(qLen + 1);
     assertf(copyBuff != NULL);
-    copyBuff[0] = '\0';
-    for(i = 0; i < ampargs; i++) {
-      if (i == 0)
-        strcatbuff(copyBuff, "?");
-      else
-        strcatbuff(copyBuff, "&");
-      strcatbuff(copyBuff, amps[i] + 1);
+    {
+      htsbuff cb = htsbuff_ptr(copyBuff, qLen + 1);
+
+      for (i = 0; i < ampargs; i++) {
+        htsbuff_cat(&cb, i == 0 ? "?" : "&");
+        htsbuff_cat(&cb, amps[i] + 1);
+      }
+      assertf(cb.len == qLen);
     }
-    assertf(strlen(copyBuff) == qLen);
-    strcpybuff(query, copyBuff);
+    /* query points into dest where the original qLen-byte query was */
+    strlcpybuff(query, copyBuff, qLen + 1);
 
     /* Cleanup */
     freet(amps);
@@ -3495,12 +3467,19 @@ HTSEXT_API char *fil_normalized(const char *source, char *dest) {
 }
 
 #define endwith(a) ( (len >= (sizeof(a)-1)) ? ( strncmp(dest, a+len-(sizeof(a)-1), sizeof(a)-1) == 0 ) : 0 );
-HTSEXT_API char *adr_normalized(const char *source, char *dest) {
+HTSEXT_API char *adr_normalized_sized(const char *source, char *dest,
+                                      size_t destsize) {
   /* not yet too aggressive (no com<->net<->org checkings) */
-  strcpybuff(dest, jump_normalized_const(source));
+  strlcpybuff(dest, jump_normalized_const(source), destsize);
   return dest;
 }
 
+// deprecated variant; kept for ABI compatibility. Bounds to the implicit
+// contract the old callers relied on (an HTS_URLMAXSIZE*2 URL buffer).
+HTSEXT_API char *adr_normalized(const char *source, char *dest) {
+  return adr_normalized_sized(source, dest, HTS_URLMAXSIZE * 2);
+}
+
 #undef endwith
 
 // find port (:80) or NULL if not found
@@ -3925,9 +3904,9 @@ HTSEXT_API size_t escape_for_html_print_full(const char *const s, char *const de
 
 #undef ADD_CHAR
 
-// conversion minuscules, avec buffer
-char *convtolower(char *catbuff, const char *a) {
-  strcpybuff(catbuff, a);
+// lower-case conversion into caller buffer (capacity catbuffsize)
+char *convtolower(char *catbuff, size_t catbuffsize, const char *a) {
+  strlcpybuff(catbuff, a, catbuffsize);
   hts_lowcase(catbuff);         // lower case
   return catbuff;
 }
@@ -3950,22 +3929,34 @@ void hts_replace(char *s, char from, char to) {
   }
 }
 
-// deviner type d'un fichier local..
-// ex: fil="toto.gif" -> s="image/gif"
-void guess_httptype(httrackp * opt, char *s, const char *fil) {
-  get_httptype(opt, s, fil, 1);
+// guess a local file's mime type (e.g. fil="toto.gif" -> s="image/gif")
+// returns 1 if a type was written to s, 0 otherwise
+int guess_httptype_sized(httrackp *opt, char *s, size_t ssize,
+                         const char *fil) {
+  return get_httptype_sized(opt, s, ssize, fil, 1);
 }
 
-// idem
-// flag: 1 si toujours renvoyer un type
-HTSEXT_API void get_httptype(httrackp * opt, char *s, const char *fil, int flag) {
-  // userdef overrides get_httptype
+// deprecated variant; kept for ABI compatibility. Bounds to the implicit
+// contract the old callers relied on (a contenttype-sized buffer).
+void guess_httptype(httrackp * opt, char *s, const char *fil) {
+  (void) get_httptype_sized(opt, s, HTS_MIMETYPE_SIZE, fil, 1);
+}
+
+// write the mime type for fil into s (capacity ssize)
+// flag: 1 to always return a type (the "application/..." / octet-stream
+// fallback) returns 1 if a type was written to s, 0 otherwise
+HTSEXT_API int get_httptype_sized(httrackp *opt, char *s, size_t ssize,
+                                  const char *fil, int flag) {
+  // userdef overrides get_httptype (a rule with an empty value, e.g. "--assume
+  // cgi=", matches but writes nothing: report it as "no type" like the old
+  // code, whose callers tested strnotempty(s))
   if (get_userhttptype(opt, s, fil)) {
-    return;
+    return s[0] != '\0';
   }
   // regular tests
   if (ishtml(opt, fil) == 1) {
-    strcpybuff(s, "text/html");
+    strlcpybuff(s, "text/html", ssize);
+    return 1;
   } else {
     /* Check html -> text/html */
     const char *a = fil + strlen(fil) - 1;
@@ -3978,21 +3969,33 @@ HTSEXT_API void get_httptype(httrackp * opt, char *s, const char *fil, int flag)
       a++;
       while(strnotempty(hts_mime[j][1])) {
         if (strfield2(hts_mime[j][1], a)) {
-          if (hts_mime[j][0][0] != '*') {       // Une correspondance existe
-            strcpybuff(s, hts_mime[j][0]);
-            return;
+          if (hts_mime[j][0][0] != '*') { // a match exists
+            strlcpybuff(s, hts_mime[j][0], ssize);
+            return 1;
           }
         }
         j++;
       }
 
-      if (flag)
-        sprintf(s, "application/%s", a);
+      if (flag) {
+        snprintf(s, ssize, "application/%s", a);
+        return 1;
+      }
     } else {
-      if (flag)
-        strcpybuff(s, "application/octet-stream");
+      if (flag) {
+        strlcpybuff(s, "application/octet-stream", ssize);
+        return 1;
+      }
     }
   }
+  return 0;
+}
+
+// deprecated variant; kept for ABI compatibility. Bounds to the implicit
+// contract the old callers relied on (a contenttype-sized buffer).
+HTSEXT_API void get_httptype(httrackp *opt, char *s, const char *fil,
+                             int flag) {
+  (void) get_httptype_sized(opt, s, HTS_MIMETYPE_SIZE, fil, flag);
 }
 
 // get type of fil (php)
@@ -4102,17 +4105,17 @@ int get_userhttptype(httrackp * opt, char *s, const char *fil) {
   return 0;
 }
 
-// renvoyer extesion d'un type mime..
-// ex: "image/gif" -> gif
-void give_mimext(char *s, const char *st) {
+// give the file extension for a mime type (e.g. "image/gif" -> "gif")
+// returns 1 if an extension was found (and written to s), 0 otherwise
+int give_mimext(char *s, size_t ssize, const char *st) {
   int ok = 0;
   int j = 0;
 
   s[0] = '\0';
   while((!ok) && (strnotempty(hts_mime[j][1]))) {
     if (strfield2(hts_mime[j][0], st)) {
-      if (hts_mime[j][1][0] != '*') {   // Une correspondance existe
-        strcpybuff(s, hts_mime[j][1]);
+      if (hts_mime[j][1][0] != '*') { // a match exists
+        strlcpybuff(s, hts_mime[j][1], ssize);
         ok = 1;
       }
     }
@@ -4133,12 +4136,13 @@ void give_mimext(char *s, const char *st) {
     if (a) {
       if ((int) strlen(a) >= 1) {
         if ((int) strlen(a) <= 4) {
-          strcpybuff(s, a);
+          strlcpybuff(s, a, ssize);
           ok = 1;
         }
       }
     }
   }
+  return ok;
 }
 
 // extension connue?..
@@ -4236,9 +4240,8 @@ int may_bogus_multiple(httrackp * opt, const char *mime, const char *filename) {
     if (strfield2(hts_mime_bogus_multiple[j], mime)) {  /* found mime type in suspicious list */
       char ext[64];
 
-      ext[0] = '\0';
-      give_mimext(ext, mime);
-      if (ext[0] != 0) {        /* we have an extension for that */
+      if (give_mimext(ext, sizeof(ext),
+                      mime)) { /* we have an extension for that */
         const size_t ext_size = strlen(ext);
         const char *file = strrchr(filename, '/');      /* fetch terminal filename */
 
@@ -4961,7 +4964,8 @@ void hts_freeall(void) {
 
 // cut path and project name
 // patch also initial path
-void cut_path(char *fullpath, char *path, char *pname) {
+void cut_path(char *fullpath, char *path, size_t path_size, char *pname,
+              size_t pname_size) {
   path[0] = pname[0] = '\0';
   if (strnotempty(fullpath)) {
     if ((fullpath[strlen(fullpath) - 1] == '/')
@@ -4977,8 +4981,8 @@ void cut_path(char *fullpath, char *path, char *pname) {
         a--;
       if (*a == '/')
         a++;
-      strcpybuff(pname, a);
-      strncatbuff(path, fullpath, (int) (a - fullpath));
+      strlcpybuff(pname, a, pname_size);
+      strlncatbuff(path, fullpath, path_size, (size_t) (a - fullpath));
     }
   }
 }

src/htslib.h

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */
@@ -252,7 +252,7 @@ int ishtml_ext(const char *a);
 int ishttperror(int err);
 
 int get_userhttptype(httrackp * opt, char *s, const char *fil);
-void give_mimext(char *s, const char *st);
+int give_mimext(char *s, size_t ssize, const char *st);
 
 int may_bogus_multiple(httrackp * opt, const char *mime, const char *filename);
 int may_unknown2(httrackp * opt, const char *mime, const char *filename);
@@ -264,7 +264,7 @@ void code64(unsigned char *a, int size_a, unsigned char *b, int crlf);
 
 #define copychar(catbuff,a) concat(catbuff,(a),NULL)
 
-char *convtolower(char *catbuff, const char *a);
+char *convtolower(char *catbuff, size_t catbuffsize, const char *a);
 void hts_lowcase(char *s);
 void hts_replace(char *s, char from, char to);
 int multipleStringMatch(const char *s, const char *match);
@@ -276,7 +276,8 @@ void fprintfio(FILE * fp, const char *buff, const char *prefix);
 int sig_ignore_flag(int setflag);  // flag ignore
 #endif
 
-void cut_path(char *fullpath, char *path, char *pname);
+void cut_path(char *fullpath, char *path, size_t path_size, char *pname,
+              size_t pname_size);
 int fexist(const char *s);
 int fexist_utf8(const char *s);
 
@@ -499,7 +500,8 @@ HTS_STATIC int is_hypertext_mime(httrackp * opt, const char *mime,
     char guessed[256];
 
     guessed[0] = '\0';
-    guess_httptype(opt, guessed, file);
+    if (!guess_httptype_sized(opt, guessed, sizeof(guessed), file))
+      return 0;
     return is_hypertext_mime__(guessed);
   }
   return 0;
@@ -514,7 +516,8 @@ HTS_STATIC int may_be_hypertext_mime(httrackp * opt, const char *mime,
     char guessed[256];
 
     guessed[0] = '\0';
-    guess_httptype(opt, guessed, file);
+    if (!guess_httptype_sized(opt, guessed, sizeof(guessed), file))
+      return 0;
     return may_be_hypertext_mime__(guessed);
   }
   return 0;
@@ -529,7 +532,8 @@ HTS_STATIC int compare_mime(httrackp * opt, const char *mime, const char *file,
     char guessed[256];
 
     guessed[0] = '\0';
-    guess_httptype(opt, guessed, file);
+    if (!guess_httptype_sized(opt, guessed, sizeof(guessed), file))
+      return 0;
     return strfield2(guessed, reference);
   }
   return 0;

src/htsmd5.c

@@ -1,7 +1,9 @@
 
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */

src/htsmd5.h

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */

src/htsmodules.c

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */

src/htsmodules.h

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */

src/htsname.c

@@ -1,7 +1,9 @@
 /* ------------------------------------------------------------ */
 /*
 HTTrack Website Copier, Offline Browser for Windows and Unix
-Copyright (C) 1998-2017 Xavier Roche and other contributors
+Copyright (C) 1998 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -16,11 +18,9 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-Important notes:
-
-- We hereby ask people using this source NOT to use it in purpose of grabbing
-emails addresses, or collecting any other private information on persons.
-This would disgrace our work, and spoil the many hours we spent on it.
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
 
 Please visit our Website: http://www.httrack.com
 */
@@ -51,12 +51,13 @@ Please visit our Website: http://www.httrack.com
       url_savename_addstr(afs->save, buff);\
     }
 
-#define ADD_STANDARD_NAME(shortname) \
-    {  /* ajout nom */\
-      char BIGSTK buff[HTS_URLMAXSIZE*2];\
-      standard_name(buff,dot_pos,nom_pos,fil_complete,(shortname));\
-      url_savename_addstr(afs->save, buff);\
-    }
+#define ADD_STANDARD_NAME(shortname)                                           \
+  { /* add name */                                                             \
+    char BIGSTK buff[HTS_URLMAXSIZE * 2];                                      \
+    standard_name(buff, sizeof(buff), dot_pos, nom_pos, fil_complete,          \
+                  (shortname));                                                \
+    url_savename_addstr(afs->save, buff);                                      \
+  }
 
 /* Avoid stupid DOS system folders/file such as 'nul' */
 /* Based on linux/fs/umsdos/mangle.c */
@@ -200,7 +201,7 @@ int url_savename(lien_adrfilsave *const afs,
   // foo.com/bar//foobar -> foo.com/bar/foobar
   if (opt->urlhack) {
     // copy of adr (without protocol), used for lookups (see urlhack)
-    normadr = adr_normalized(adr, normadr_);
+    normadr = adr_normalized_sized(adr, normadr_, sizeof(normadr_));
     normfil = fil_normalized(fil_complete, normfil_);
   } else {
     if (link_has_authority(adr_complete)) {     // https or other protocols : in "http/" subfolder
@@ -344,8 +345,7 @@ int url_savename(lien_adrfilsave *const afs,
         mime[0] = ext[0] = '\0';
         get_userhttptype(opt, mime, fil);
         if (strnotempty(mime)) {
-          give_mimext(ext, mime);
-          if (strnotempty(ext)) {
+          if (give_mimext(ext, sizeof(ext), mime)) {
             ext_chg = 1;
           }
         }
@@ -378,8 +378,8 @@ int url_savename(lien_adrfilsave *const afs,
                 ext_chg = 2;      /* change filename */
                 strcpybuff(ext, r.cdispo);
               } else if (!may_unknown2(opt, r.contenttype, fil)) {        // on peut patcher à priori?
-                give_mimext(s, r.contenttype);    // obtenir extension
-                if (strnotempty(s) > 0) { // on a reconnu l'extension
+                if (give_mimext(s, sizeof(s),
+                                r.contenttype)) { // recognized extension
                   ext_chg = 1;
                   strcpybuff(ext, s);
                 }
@@ -403,8 +403,7 @@ int url_savename(lien_adrfilsave *const afs,
             mime[0] = ext[0] = '\0';
             get_userhttptype(opt, mime, fil);
             if (strnotempty(mime)) {
-              give_mimext(ext, mime);
-              if (strnotempty(ext)) {
+              if (give_mimext(ext, sizeof(ext), mime)) {
                 ext_chg = 1;
               }
             }
@@ -420,9 +419,9 @@ int url_savename(lien_adrfilsave *const afs,
                 strcpybuff(ext, headers->r.cdispo);
               } else if (!may_unknown2(opt, headers->r.contenttype, headers->url_fil)) {    // on peut patcher à priori? (pas interdit ou pas de type)
                 char s[16];
-                s[0] = '\0';
-                give_mimext(s, headers->r.contenttype);    // obtenir extension
-                if (strnotempty(s) > 0) { // on a reconnu l'extension
+                if (give_mimext(
+                        s, sizeof(s),
+                        headers->r.contenttype)) { // recognized extension
                   ext_chg = 1;
                   strcpybuff(ext, s);
                 }
@@ -431,13 +430,14 @@ int url_savename(lien_adrfilsave *const afs,
             else if (mime_type != NULL) {
               ext[0] = '\0';
               if (*mime_type) {
-                give_mimext(ext, mime_type);
+                give_mimext(ext, sizeof(ext), mime_type);
               }
               if (strnotempty(ext)) {
                 char mime_from_file[128];
 
                 mime_from_file[0] = 0;
-                get_httptype(opt, mime_from_file, fil, 1);
+                get_httptype_sized(opt, mime_from_file, sizeof(mime_from_file),
+                                   fil, 1);
                 if (!strnotempty(mime_from_file) || strcasecmp(mime_type, mime_from_file) != 0) {       /* different mime for this type */
                   /* type change not forbidden (or no extension at all) */
                   if (!may_unknown2(opt, mime_type, fil)) {
@@ -646,8 +646,9 @@ int url_savename(lien_adrfilsave *const afs,
                       ext_chg = 2;      /* change filename */
                       strcpybuff(ext, back[b].r.cdispo);
                     } else if (!may_unknown2(opt, back[b].r.contenttype, back[b].url_fil)) {    // on peut patcher à priori? (pas interdit ou pas de type)
-                      give_mimext(s, back[b].r.contenttype);    // obtenir extension
-                      if (strnotempty(s) > 0) { // on a reconnu l'extension
+                      if (give_mimext(
+                              s, sizeof(s),
+                              back[b].r.contenttype)) { // recognized extension
                         ext_chg = 1;
                         strcpybuff(ext, s);
                       }
@@ -767,7 +768,7 @@ int url_savename(lien_adrfilsave *const afs,
   // ajouter nom du site éventuellement en premier
   if (opt->savename_type == -1) {       // utiliser savename_userdef! (%h%p/%n%q.%t)
     const char *a = StringBuff(opt->savename_userdef);
-    char *b = afs->save;
+    htsbuff sb = htsbuff_array(afs->save);
 
     /*char *nom_pos=NULL,*dot_pos=NULL;  // Position nom et point */
     char tok;
@@ -787,17 +788,16 @@ int url_savename(lien_adrfilsave *const afs,
        }
      */
 
-    // Construire nom
-    while((*a) && (((int) (b - afs->save)) < HTS_URLMAXSIZE)) {      // parser, et pas trop long..
+    // build the name
+    while ((*a) && (sb.len < HTS_URLMAXSIZE)) { // parse, but not too long
       if (*a == '%') {
         int short_ver = 0;
 
         a++;
-        if (*a == 's') {
+        if (*a == 's') { // '%s...' selects the short (8.3) form
           short_ver = 1;
           a++;
         }
-        *b = '\0';
         switch (tok = *a++) {
         case '[':              // %[param:prefix_if_not_empty:suffix_if_not_empty:empty_replacement:notfound_replacement]
           if (strchr(a, ']')) {
@@ -834,8 +834,7 @@ int url_savename(lien_adrfilsave *const afs,
               }
               if (cp) {
                 c = cp + strlen(name[0]);       /* jumps "param=" */
-                strcpybuff(b, name[1]); /* prefix */
-                b += strlen(b);
+                htsbuff_cat(&sb, name[1]);      /* prefix */
                 if (*c != '\0' && *c != '&') {
                   char *d = name[0];
 
@@ -846,110 +845,90 @@ int url_savename(lien_adrfilsave *const afs,
                   *d = '\0';
                   d = unescape_http(catbuff, sizeof(catbuff), name[0]);
                   if (d && *d) {
-                    strcpybuff(b, d);   /* value */
-                    b += strlen(b);
+                    htsbuff_cat(&sb, d); /* value */
                   } else {
-                    strcpybuff(b, name[3]);     /* empty replacement if any */
-                    b += strlen(b);
+                    htsbuff_cat(&sb, name[3]); /* empty replacement if any */
                   }
                 } else {
-                  strcpybuff(b, name[3]);       /* empty replacement if any */
-                  b += strlen(b);
+                  htsbuff_cat(&sb, name[3]); /* empty replacement if any */
                 }
-                strcpybuff(b, name[2]); /* suffix */
-                b += strlen(b);
+                htsbuff_cat(&sb, name[2]); /* suffix */
               } else {
-                strcpybuff(b, name[4]); /* not found replacement if any */
-                b += strlen(b);
+                htsbuff_cat(&sb, name[4]); /* not found replacement if any */
               }
             } else {
-              strcpybuff(b, name[4]);   /* not found replacement if any */
-              b += strlen(b);
+              htsbuff_cat(&sb, name[4]); /* not found replacement if any */
             }
           }
           break;
         case '%':
-          *b++ = '%';
+          htsbuff_catc(&sb, '%');
           break;
-        case 'n':              // nom sans ext
-          *b = '\0';
+        case 'n': // name without extension
           if (dot_pos) {
-            if (!short_ver)     // Noms longs
-              strncatbuff(b, nom_pos, (int) (dot_pos - nom_pos));
+            if (!short_ver)
+              htsbuff_catn(&sb, nom_pos, (int) (dot_pos - nom_pos));
             else
-              strncatbuff(b, nom_pos, min((int) (dot_pos - nom_pos), 8));
+              htsbuff_catn(&sb, nom_pos, min((int) (dot_pos - nom_pos), 8));
           } else {
-            if (!short_ver)     // Noms longs
-              strcpybuff(b, nom_pos);
+            if (!short_ver)
+              htsbuff_cat(&sb, nom_pos);
             else
-              strncatbuff(b, nom_pos, 8);
+              htsbuff_catn(&sb, nom_pos, 8);
           }
-          b += strlen(b);       // pointer à la fin
           break;
-        case 'N':              // nom avec ext
-          // RECOPIE NOM + EXT
-          *b = '\0';
+        case 'N': // name with extension
           if (dot_pos) {
-            if (!short_ver)     // Noms longs
-              strncatbuff(b, nom_pos, (int) (dot_pos - nom_pos));
+            if (!short_ver)
+              htsbuff_catn(&sb, nom_pos, (int) (dot_pos - nom_pos));
             else
-              strncatbuff(b, nom_pos, min((int) (dot_pos - nom_pos), 8));
+              htsbuff_catn(&sb, nom_pos, min((int) (dot_pos - nom_pos), 8));
           } else {
-            if (!short_ver)     // Noms longs
-              strcpybuff(b, nom_pos);
+            if (!short_ver)
+              htsbuff_cat(&sb, nom_pos);
             else
-              strncatbuff(b, nom_pos, 8);
+              htsbuff_catn(&sb, nom_pos, 8);
           }
-          b += strlen(b);       // pointer à la fin
-          *b = '.';
-          ++b;
-          // RECOPIE NOM + EXT
-          *b = '\0';
+          htsbuff_catc(&sb, '.');
           if (dot_pos) {
-            if (!short_ver)     // Noms longs
-              strcpybuff(b, dot_pos + 1);
+            if (!short_ver)
+              htsbuff_cat(&sb, dot_pos + 1);
             else
-              strncatbuff(b, dot_pos + 1, 3);
+              htsbuff_catn(&sb, dot_pos + 1, 3);
           } else {
-            if (!short_ver)     // Noms longs
-              strcpybuff(b, DEFAULT_EXT + 1);   // pas de..
+            if (!short_ver)
+              htsbuff_cat(&sb, DEFAULT_EXT + 1); // skip the leading dot
             else
-              strcpybuff(b, DEFAULT_EXT_SHORT + 1);     // pas de..
+              htsbuff_cat(&sb, DEFAULT_EXT_SHORT + 1); // skip the leading dot
           }
-          b += strlen(b);       // pointer à la fin
-          //
           break;
-        case 't':              // ext
-          *b = '\0';
+        case 't': // extension
           if (dot_pos) {
-            if (!short_ver)     // Noms longs
-              strcpybuff(b, dot_pos + 1);
+            if (!short_ver)
+              htsbuff_cat(&sb, dot_pos + 1);
             else
-              strncatbuff(b, dot_pos + 1, 3);
+              htsbuff_catn(&sb, dot_pos + 1, 3);
           } else {
-            if (!short_ver)     // Noms longs
-              strcpybuff(b, DEFAULT_EXT + 1);   // pas de..
+            if (!short_ver)
+              htsbuff_cat(&sb, DEFAULT_EXT + 1); // skip the leading dot
             else
-              strcpybuff(b, DEFAULT_EXT_SHORT + 1);     // pas de..
+              htsbuff_cat(&sb, DEFAULT_EXT_SHORT + 1); // skip the leading dot
           }
-          b += strlen(b);       // pointer à la fin
           break;
-        case 'p':              // path sans dernier /
-          *b = '\0';
-          if (nom_pos != fil + 1) {     // pas: /index.html (chemin nul)
-            if (!short_ver) {   // Noms longs
-              strncatbuff(b, fil, (int) (nom_pos - fil) - 1);
+        case 'p': // path without trailing /
+          if (nom_pos !=
+              fil + 1) { // skip when the path is empty (e.g. /index.html)
+            if (!short_ver) {
+              htsbuff_catn(&sb, fil, (int) (nom_pos - fil) - 1);
             } else {
               char BIGSTK pth[HTS_URLMAXSIZE * 2], n83[HTS_URLMAXSIZE * 2];
 
               pth[0] = n83[0] = '\0';
-              //
               strncatbuff(pth, fil, (int) (nom_pos - fil) - 1);
-              long_to_83(opt->savename_83, n83, pth);
-              strcpybuff(b, n83);
+              long_to_83(opt->savename_83, n83, sizeof(n83), pth);
+              htsbuff_cat(&sb, n83);
             }
           }
-          b += strlen(b);       // pointer à la fin
           break;
         case 'h':              // host (IDNA decoded if suitable)
           // IDNA / RFC 3492 (Punycode) handling for HTTP(s)
@@ -957,62 +936,50 @@ int url_savename(lien_adrfilsave *const afs,
             DECLARE_ADR(final_adr);
 
             /* Copy address */
-            *b = '\0';
             if (!short_ver)
-              strcpybuff(b, final_adr);
+              htsbuff_cat(&sb, final_adr);
             else
-              strcpybuff(b, final_adr);
+              htsbuff_cat(&sb, final_adr);
 
             /* release */
             RELEASE_ADR();
           }
-          b += strlen(b);       // pointer à la fin
           break;
-        case 'H':              // host, raw (old mode)
-          *b = '\0';
+        case 'H': // host, raw (old mode)
           if (protocol == PROTOCOL_FILE) {
-            if (!short_ver)     // Noms longs
-              strcpybuff(b, "localhost");
+            if (!short_ver)
+              htsbuff_cat(&sb, "localhost");
             else
-              strcpybuff(b, "local");
+              htsbuff_cat(&sb, "local");
           } else {
-            if (!short_ver)     // Noms longs
-              strcpybuff(b, print_adr);
+            if (!short_ver)
+              htsbuff_cat(&sb, print_adr);
             else
-              strncatbuff(b, print_adr, 8);
+              htsbuff_catn(&sb, print_adr, 8);
           }
-          b += strlen(b);       // pointer à la fin
           break;
-        case 'M':              /* host/address?query MD5 (128-bits) */
-          *b = '\0';
-          {
-            char digest[32 + 2];
-            char BIGSTK buff[HTS_URLMAXSIZE * 2];
+        case 'M': /* host/address?query MD5 (128-bits) */
+        {
+          char digest[32 + 2];
+          char BIGSTK buff[HTS_URLMAXSIZE * 2];
 
-            digest[0] = buff[0] = '\0';
-            strcpybuff(buff, adr);
-            strcatbuff(buff, fil_complete);
-            domd5mem(buff, strlen(buff), digest, 1);
-            strcpybuff(b, digest);
-          }
-          b += strlen(b);       // pointer à la fin
-          break;
+          digest[0] = buff[0] = '\0';
+          strcpybuff(buff, adr);
+          strcatbuff(buff, fil_complete);
+          domd5mem(buff, strlen(buff), digest, 1);
+          htsbuff_cat(&sb, digest);
+        } break;
         case 'Q':
-        case 'q':              /* query MD5 (128-bits/16-bits) 
-                                   GENERATED ONLY IF query string exists! */
-          {
-            char md5[32 + 2];
+        case 'q': /* query MD5 (128-bits/16-bits)
+                      GENERATED ONLY IF query string exists! */
+        {
+          char md5[32 + 2];
 
-            *b = '\0';
-            strncatbuff(b, url_md5(md5, fil_complete), (tok == 'Q') ? 32 : 4);
-            b += strlen(b);     // pointer à la fin
-          }
-          break;
+          htsbuff_catn(&sb, url_md5(md5, fil_complete), (tok == 'Q') ? 32 : 4);
+        } break;
         case 'r':
         case 'R':              // protocol
-          *b = '\0';
-          strcatbuff(b, protocol_str[protocol]);
-          b += strlen(b);       // pointer à la fin
+          htsbuff_cat(&sb, protocol_str[protocol]);
           break;
 
           /* Patch by Juan Fco Rodriguez to get the full query string */
@@ -1021,19 +988,17 @@ int url_savename(lien_adrfilsave *const afs,
             char *d = strchr(fil_complete, '?');
 
             if (d != NULL) {
-              strcatbuff(b, d);
-              b += strlen(b);
+              htsbuff_cat(&sb, d);
             }
           }
           break;
 
         }
       } else
-        *b++ = *a++;
+        htsbuff_catc(&sb, *a++);
     }
-    *b++ = '\0';
     //
-    // Types prédéfinis
+    // predefined types
     //
 
   }
@@ -1342,7 +1307,7 @@ int url_savename(lien_adrfilsave *const afs,
   if (opt->savename_83) {
     char BIGSTK n83[HTS_URLMAXSIZE * 2];
 
-    long_to_83(opt->savename_83, n83, afs->save);
+    long_to_83(opt->savename_83, n83, sizeof(n83), afs->save);
     strcpybuff(afs->save, n83);
   }
   // enforce stricter ISO9660 compliance (bug reported by Steffo Carlsson)
@@ -1413,7 +1378,9 @@ int url_savename(lien_adrfilsave *const afs,
     if (lastDot == NULL) {
       strcatbuff(afs->save, "." DELAYED_EXT);
     } else if (!IS_DELAYED_EXT(afs->save)) {
-      strcatbuff(lastDot, "." DELAYED_EXT);
+      /* lastDot points within afs->save; bound by the remaining capacity */
+      strlcatbuff(lastDot, "." DELAYED_EXT,
+                  sizeof(afs->save) - (size_t) (lastDot - afs->save));
     }
   }
   // enforce 260-character path limit before inserting destination path
@@ -1618,41 +1585,41 @@ int url_savename(lien_adrfilsave *const afs,
   return 0;
 }
 
-/* nom avec md5 urilisé partout */
-void standard_name(char *b, const char *dot_pos, const char *nom_pos, const char *fil,
-                   int short_ver) {
+/* md5-based name used everywhere; builds into b (capacity bsize) */
+void standard_name(char *b, size_t bsize, const char *dot_pos,
+                   const char *nom_pos, const char *fil, int short_ver) {
   char md5[32 + 2];
+  htsbuff bb = htsbuff_ptr(b, bsize);
 
-  b[0] = '\0';
-  /* Nom */
+  /* Name */
   if (dot_pos) {
-    if (!short_ver)             // Noms longs
-      strncatbuff(b, nom_pos, (dot_pos - nom_pos));
+    if (!short_ver) // long names
+      htsbuff_catn(&bb, nom_pos, (size_t) (dot_pos - nom_pos));
     else
-      strncatbuff(b, nom_pos, min(dot_pos - nom_pos, 8));
+      htsbuff_catn(&bb, nom_pos, (size_t) min(dot_pos - nom_pos, 8));
   } else {
-    if (!short_ver)             // Noms longs
-      strcatbuff(b, nom_pos);
+    if (!short_ver) // long names
+      htsbuff_cat(&bb, nom_pos);
     else
-      strncatbuff(b, nom_pos, 8);
+      htsbuff_catn(&bb, nom_pos, 8);
   }
   /* MD5 - 16 bits */
-  strncatbuff(b, url_md5(md5, fil), 4);
+  htsbuff_catn(&bb, url_md5(md5, fil), 4);
   /* Ext */
   if (dot_pos) {
-    strcatbuff(b, ".");
-    if (!short_ver)             // Noms longs
-      strcatbuff(b, dot_pos + 1);
+    htsbuff_catc(&bb, '.');
+    if (!short_ver) // long names
+      htsbuff_cat(&bb, dot_pos + 1);
     else
-      strncatbuff(b, dot_pos + 1, 3);
+      htsbuff_catn(&bb, dot_pos + 1, 3);
   }
   // Allow extensionless
 #ifdef DO_NOT_ALLOW_EXTENSIONLESS
   else {
-    if (!short_ver)             // Noms longs
-      strcatbuff(b, DEFAULT_EXT);
+    if (!short_ver) // long names
+      htsbuff_cat(&bb, DEFAULT_EXT);
     else
-      strcatbuff(b, DEFAULT_EXT_SHORT);
+      htsbuff_cat(&bb, DEFAULT_EXT_SHORT);
   }
 #endif
 }