Add a CodeQL C analysis workflow

Scan on push to master, PRs, and a weekly cron, with the security-extended
query suite; findings land in the code-scanning dashboard. Manual build mode
so CodeQL traces the real autotools build.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Signed-off-by: Xavier Roche <roche@httrack.com>

.clang-format

@@ -16,6 +16,7 @@ BasedOnStyle: 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
+SeparateDefinitionBlocks: Always  # blank line between definitions (readability)
 
 # Stated explicitly for robustness against base-style drift (these match LLVM):
 IndentWidth: 2

.flake8

@@ -0,0 +1,5 @@
+[flake8]
+# Match black's formatting so the two tools don't fight.
+max-line-length = 88
+# E203/W503 conflict with black's slice and line-break style.
+extend-ignore = E203, W503

.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
 
@@ -61,31 +61,372 @@ jobs:
         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)
+  # Reproduce the Debian buildds: they build in a minimal chroot with no
+  # python3, so the local-server tests must SKIP (exit 77), not fail. GitHub
+  # runners ship python3, so every other job hides this path; here we remove it
+  # before `make check`. This is the guard that would have caught the 3.49.10-1
+  # FTBFS (28_local-pause failed instead of skipping when python3 was absent).
+  buildd-no-python3:
+    name: build (no python3, Debian buildd)
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           submodules: recursive
 
-      - name: Install packaging toolchain
+      - 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
+        run: |
+          set -euo pipefail
+          autoreconf -fi
+          ./configure
+
+      - name: Build
+        run: make -j"$(nproc)"
+
+      - name: Test without python3
+        run: |
+          set -euo pipefail
+          # Hide every python3* so `command -v python3` fails like it does in the
+          # buildd chroot; masking with /bin/false would still resolve.
+          sudo find /usr/bin /usr/local/bin -maxdepth 1 -name 'python3*' \
+            -exec mv {} {}.hidden \;
+          ! command -v python3
+          make check
+
+      - name: Print the test log on failure
+        if: failure()
+        run: cat tests/test-suite.log 2>/dev/null || true
+
+  # Portability: build and test on macOS (Darwin/clang) on a native runner --
+  # no VM. The tree has no __APPLE__ branches, so Darwin exercises the
+  # generic-Unix path on a second libc and kernel. brew's openssl@3 is keg-only,
+  # so point configure at it; everything else is in the SDK or default paths.
+  macos:
+    name: build (macOS arm64, clang)
+    runs-on: macos-14
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          submodules: recursive
+
+      - name: Install build dependencies
+        run: |
+          set -euo pipefail
+          brew install autoconf automake libtool autoconf-archive
+
+      - name: Configure
+        run: |
+          set -euo pipefail
+          ssl="$(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
+
+  # MemorySanitizer catches reads of uninitialized memory (#143's stack-garbage
+  # size filter) that ASan/UBSan miss. It flags any byte an uninstrumented lib
+  # wrote, so the job stays in our own code: offline self-tests only, no openssl
+  # (--disable-https), no zlib cache tests, static (the runtime is not in .so's).
+  msan:
+    name: msan (MemorySanitizer, clang)
+    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 clang autoconf automake libtool autoconf-archive \
+            zlib1g-dev
+
+      - name: Configure (MSan, static, no https)
+        run: |
+          set -euo pipefail
+          autoreconf -fi
+          ./configure CC=clang \
+            CFLAGS="-fsanitize=memory -fsanitize-memory-track-origins=2 -fno-sanitize-recover=all -g -O1 -fno-omit-frame-pointer" \
+            LDFLAGS="-fsanitize=memory" \
+            --disable-https --disable-shared --enable-static
+
+      - name: Build
+        run: make -j"$(nproc)"
+
+      - name: Test (offline self-tests under MSan)
+        env:
+          MSAN_OPTIONS: abort_on_error=1:halt_on_error=1
+        run: |
+          set -euo pipefail
+          # 01_engine-* only; zlib-dependent self-tests are named 01_zlib-* and
+          # skipped here (uninstrumented libz floods MSan with false positives).
+          tests="$(cd tests && ls 01_engine-*.test | tr '\n' ' ')"
+          make check TESTS="$tests"
+
+      - name: Print the test log on failure
+        if: failure()
+        run: cat tests/test-suite.log 2>/dev/null || true
+
+  # libFuzzer smoke: build the fuzz/ harnesses over the pure hostile-input
+  # parsers and replay each seed corpus under ASan+UBSan+LeakSanitizer. Replay
+  # (not open-ended mutation) keeps CI deterministic -- it can't hit strjoker's
+  # catastrophic backtracking -- and pins the regression seeds for the bugs the
+  # fuzzers found. Deep discovery is a maintainer / OSS-Fuzz activity.
+  fuzz:
+    name: fuzz (libFuzzer corpus replay, clang)
+    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 clang autoconf automake libtool autoconf-archive \
+            zlib1g-dev libssl-dev
+
+      - name: Configure (fuzzers, static)
+        run: |
+          set -euo pipefail
+          autoreconf -fi
+          ./configure CC=clang \
+            CFLAGS="-fsanitize=address,undefined -fno-sanitize-recover=all -g -O1 -fno-omit-frame-pointer" \
+            LDFLAGS="-fsanitize=address,undefined" \
+            --enable-fuzzers --disable-shared
+
+      - name: Build
+        run: make -j"$(nproc)"
+
+      - name: Replay corpora
+        env:
+          ASAN_OPTIONS: detect_leaks=1:abort_on_error=1:halt_on_error=1
+          UBSAN_OPTIONS: print_stacktrace=1:halt_on_error=1
+        run: bash fuzz/run-fuzzers.sh fuzz check
+
+  # Optional-dependency build: compile and test with HTTPS/OpenSSL disabled --
+  # the configuration users on minimal systems build, and one libssl is not even
+  # installed here so configure cannot silently re-enable it. The matrix above
+  # always has libssl, so the #if HTS_USEOPENSSL branches would otherwise never
+  # be compiled and could rot unnoticed.
+  no-ssl:
+    name: build (no openssl, --disable-https)
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          submodules: recursive
+
+      - name: Install build dependencies (no libssl)
+        run: |
+          set -euo pipefail
+          sudo apt-get update
+          sudo apt-get install -y --no-install-recommends \
+            build-essential autoconf automake libtool autoconf-archive zlib1g-dev
+
+      - name: Configure (https disabled)
+        run: |
+          set -euo pipefail
+          autoreconf -fi
+          ./configure --disable-https
+
+      - name: Build
+        run: make -j"$(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. mkdeb.sh runs lintian as an explicit gate
+  # (debuild does not propagate lintian's exit) with --fail-on=error,warning.
+  deb:
+    name: deb package (lintian)
+    runs-on: ubuntu-24.04
+    # Build and gate inside Debian sid, the upload target. A Debian dpkg-deb
+    # produces archive-legal xz members (an Ubuntu host defaults to zstd, which
+    # the archive's lintian rejects), and sid's lintian carries the same
+    # data-driven checks (embedded-lib fingerprints and the like) the buildds and
+    # UDD apply -- so issues surface here instead of after upload.
+    container: debian:sid
+    steps:
+      - name: Install packaging toolchain
+        run: |
+          set -euo pipefail
+          apt-get update
+          apt-get install -y --no-install-recommends \
+            ca-certificates git \
             build-essential autoconf automake libtool autoconf-archive \
             zlib1g-dev libssl-dev \
             debhelper devscripts lintian fakeroot
 
+      - uses: actions/checkout@v6
+        with:
+          submodules: recursive
+
       # --unsigned: CI has no GPG key (also skips the release sig/checksums).
-      # debuild builds every package, then lintian gates on errors.
-      - name: Build Debian packages
-        run: bash tools/mkdeb.sh --unsigned --no-release-artifacts
+      # mkdeb builds every package then runs the lintian gate (--fail-on=error,
+      # warning); debuild runs the packaged test pass.
+      #
+      # 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.
+      - name: Build and lint Debian packages
+        run: |
+          set -euo pipefail
+          # The workspace volume is owned by the host runner uid, but the
+          # container runs as root, so mkdeb's git calls (superproject and the
+          # coucal submodule) trip "dubious ownership"; mark them all safe.
+          git config --global --add safe.directory "*"
+          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
@@ -93,7 +434,7 @@ jobs:
     if: github.event_name == 'pull_request'
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
@@ -121,27 +462,38 @@ jobs:
   lint:
     name: lint (shellcheck, shfmt)
     runs-on: ubuntu-24.04
+    # Every tracked shell script; the globs expand at run time. Kept here so the
+    # shellcheck and shfmt steps below cannot drift apart.
+    env:
+      SHELL_SCRIPTS: >-
+        .githooks/pre-commit
+        bootstrap
+        build.sh
+        html/div/search.sh
+        man/makeman.sh
+        src/htsbasiccharsets.sh
+        src/htsentities.sh
+        src/webhttrack
+        tests/*.sh
+        tests/*.test
+        tools/mkdeb.sh
     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 .githooks/pre-commit tests/*.test tests/check-network.sh
+        run: shellcheck $SHELL_SCRIPTS
 
       - name: shfmt
-        run: shfmt -d -i 4 man/makeman.sh tools/mkdeb.sh .githooks/pre-commit
+        run: shfmt -d -i 4 $SHELL_SCRIPTS
 
   # 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,
@@ -151,7 +503,7 @@ jobs:
     if: github.event_name == 'pull_request'
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
@@ -165,11 +517,9 @@ jobs:
             | 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
-          # git-clang-format driver, pinned to an immutable release tag (not a
-          # moving branch) since we curl and then execute it.
-          sudo curl -fsSL -o /usr/local/bin/git-clang-format \
-            https://raw.githubusercontent.com/llvm/llvm-project/llvmorg-19.1.7/clang/tools/clang-format/git-clang-format
-          sudo chmod 0755 /usr/local/bin/git-clang-format
+          # 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
@@ -183,10 +533,9 @@ jobs:
                     --diff --extensions c,h "$base")"
           rc=$?
           set -e
-          # Classify by output first: a non-empty diff means "not clean",
-          # regardless of the driver's exit convention (the release-tag driver
-          # exits 0 and signals via stdout; some packaged drivers exit 1 on a
-          # diff). A nonzero exit with clean output is a real checker error.
+          # 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

.github/workflows/codeql.yml

@@ -0,0 +1,57 @@
+# CodeQL static analysis (C). The security-extended suite covers the classes
+# this codebase actually fights: overflows, tainted-size allocs, format bugs.
+name: CodeQL
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+  schedule:
+    # Weekly re-scan of master so new/updated queries land without a push.
+    - cron: "17 4 * * 1"
+
+permissions:
+  contents: read
+
+concurrency:
+  group: codeql-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  analyze:
+    name: analyze (c-cpp)
+    runs-on: ubuntu-24.04
+    permissions:
+      contents: read
+      # Upload findings to the repo's code-scanning dashboard.
+      security-events: write
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          submodules: recursive
+
+      - name: Install build dependencies
+        run: |
+          set -euo pipefail
+          sudo apt-get update
+          sudo apt-get install -y --no-install-recommends \
+            build-essential autoconf automake libtool autoconf-archive \
+            zlib1g-dev libssl-dev
+
+      - uses: github/codeql-action/init@v4
+        with:
+          languages: c-cpp
+          build-mode: manual
+          queries: security-extended
+
+      # Manual build: CodeQL traces the compiler, so build exactly what ships.
+      - name: Build
+        run: |
+          set -euo pipefail
+          autoreconf -fi
+          ./configure
+          make -j"$(nproc)"
+
+      - uses: github/codeql-action/analyze@v4
+        with:
+          category: "/language:c-cpp"

.gitignore

@@ -0,0 +1,44 @@
+# 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.
+*~
+
+# Python bytecode (tests/local-server.py).
+__pycache__/

AGENTS.md

@@ -0,0 +1,73 @@
+# 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 -#test=NAME` engine
+  self-test (registry in `htsselftest.c`; `-#test` lists them) 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

CONTRIBUTING.md

@@ -1,12 +1,15 @@
 # Contributing to HTTrack
 
-HTTrack is small and old. Keep changes easy to review and safe to merge.
+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 are squash-merged: the title and description become the commit message, so
-  explain *why*.
+- 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
@@ -30,9 +33,16 @@ 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.
 
+## Translations
+
+Interface strings live in [`lang/`](lang/). See [lang/README.md](lang/README.md) for the file format and how to add or update a language.
+
 ## Bugs
 
 Open an issue with the version, OS, command used, and expected vs actual result.

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

@@ -1,11 +1,12 @@
 
-SUBDIRS = src man m4 libtest templates lang html tests
+SUBDIRS = src man m4 libtest templates lang html tests fuzz
 
 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.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
+```

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

@@ -1,351 +0,0 @@
-#! /bin/sh
-# Wrapper for compilers which do not understand '-c -o'.
-
-scriptversion=2024-06-19.01; # UTC
-
-# Copyright (C) 1999-2024 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 | *.lo | *.[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>.
-GNU Automake home page: <https://www.gnu.org/software/automake/>.
-General help using GNU software: <https://www.gnu.org/gethelp/>.
-EOF
-    exit $?
-    ;;
-  -v | --v*)
-    echo "compile (GNU Automake) $scriptversion"
-    exit $?
-    ;;
-  cl | *[/\\]cl | cl.exe | *[/\\]cl.exe | \
-  clang-cl | *[/\\]clang-cl | clang-cl.exe | *[/\\]clang-cl.exe | \
-  icl | *[/\\]icl | icl.exe | *[/\\]icl.exe )
-    func_cl_wrapper "$@"      # 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

@@ -1,222 +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 C89 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, Interix, z/OS.  */
-#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 C23 Annex F.  */
-#ifndef __STDC_WANT_IEC_60559_EXT__
-# undef __STDC_WANT_IEC_60559_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 C23 Annex H and 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

@@ -1,6 +1,6 @@
 AC_PREREQ([2.71])
 
-AC_INIT([httrack], [3.49.8], [roche+packaging@httrack.com], [httrack], [http://www.httrack.com/])
+AC_INIT([httrack], [3.49.11], [roche+packaging@httrack.com], [httrack], [http://www.httrack.com/])
 AC_COPYRIGHT([
 HTTrack Website Copier, Offline Browser for Windows and Unix
 Copyright (C) 1998-2015 Xavier Roche and other contributors
@@ -29,7 +29,11 @@ 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"
+# 3:3:0: 3.49.11 only adds enum values, macros and inline helpers to the
+# installed headers (no struct layout or exported signature changed vs
+# 3.49.10), so it stays soname .so.3; bump revision.
+# (3:0:0 was the htsblk mime-buffer widening, the ABI break that moved .so.2 -> .so.3.)
+VERSION_INFO="3:3:0"
 AM_MAINTAINER_MODE
 AC_USE_SYSTEM_EXTENSIONS
 
@@ -60,6 +64,16 @@ AC_SUBST(LT_CV_OBJDIR,$lt_cv_objdir)
 # Export version info
 AC_SUBST(VERSION_INFO)
 
+# Versioned plugin name for dlopen() in hts_create_opt(); soname major is
+# libtool's current - age, so this tracks VERSION_INFO bumps automatically.
+HTS_SONAME_MAJOR=$((${VERSION_INFO%%:*} - ${VERSION_INFO##*:}))
+case "$host_os" in
+darwin*) HTS_LIBHTSJAVA_NAME="libhtsjava.$HTS_SONAME_MAJOR.dylib" ;;
+*) HTS_LIBHTSJAVA_NAME="libhtsjava.so.$HTS_SONAME_MAJOR" ;;
+esac
+AC_DEFINE_UNQUOTED([HTS_LIBHTSJAVA_NAME], ["$HTS_LIBHTSJAVA_NAME"],
+  [Versioned libhtsjava runtime name, derived from VERSION_INFO])
+
 ### Default CFLAGS
 DEFAULT_CFLAGS="-Wall -Wformat -Wformat-security \
 -Wmultichar -Wwrite-strings -Wcast-qual -Wcast-align \
@@ -82,6 +96,11 @@ AX_CHECK_COMPILE_FLAG([-Wformat-nonliteral], [DEFAULT_CFLAGS="$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"])
@@ -91,6 +110,13 @@ 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=""
@@ -200,9 +226,12 @@ AC_SUBST(OPENSSL_LIBS)
 fi
 
 ### Support IPv6
+V6_SUPPORT=no
 AC_CHECK_LIB(c, getaddrinfo, [V6_FLAG="-DINET6"
+V6_SUPPORT=yes
 AC_DEFINE(HTS_INET6, 1, [Check for IPv6])], AC_MSG_WARN([*** IPv6 not found IPv6 compatibility disabled]))
 AC_SUBST(V6_FLAG)
+AC_SUBST(V6_SUPPORT)
 
 ### Check for LFS
 AC_CHECK_LIB(c, fopen64, [LFS_FLAG="-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
@@ -281,6 +310,37 @@ AC_ARG_ENABLE([online-unit-tests],
 	])
 AC_SUBST(ONLINE_UNIT_TESTS,$online_unit_tests)
 
+## libFuzzer harnesses (fuzz/); requires clang
+AC_MSG_CHECKING(whether to build fuzzers)
+AC_ARG_ENABLE([fuzzers],
+	[AS_HELP_STRING([--enable-fuzzers],[Build libFuzzer harnesses in fuzz/ (requires clang) @<:@default=no@:>@])],
+	[
+	case "${enableval}" in
+	no|yes)
+		fuzzers=$enableval
+		AC_MSG_RESULT($enableval)
+		;;
+	*)
+		AC_MSG_ERROR(bad value for fuzzers, expected yes/no)
+		;;
+	esac
+	],
+	[
+	fuzzers=no
+	AC_MSG_RESULT(no)
+	])
+if test x"$fuzzers" = x"yes"; then
+	# Instrument the whole build for coverage; harnesses link -fsanitize=fuzzer.
+	AX_CHECK_COMPILE_FLAG([-fsanitize=fuzzer-no-link],
+		[DEFAULT_CFLAGS="$DEFAULT_CFLAGS -fsanitize=fuzzer-no-link"],
+		[AC_MSG_ERROR([--enable-fuzzers requires libFuzzer support (clang)])])
+	# clang's static sanitizer runtimes clash with -Wl,--no-undefined on the .so.
+	if test x"$enable_shared" != x"no"; then
+		AC_MSG_ERROR([--enable-fuzzers requires --disable-shared])
+	fi
+fi
+AM_CONDITIONAL([FUZZERS], [test x"$fuzzers" = x"yes"])
+
 # Final output
 AC_CONFIG_FILES([
 Makefile
@@ -292,5 +352,6 @@ lang/Makefile
 html/Makefile
 libtest/Makefile
 tests/Makefile
+fuzz/Makefile
 ])
 AC_OUTPUT

debian/changelog

@@ -1,6 +1,67 @@
+httrack (3.49.11-1) unstable; urgency=medium
+
+  * New upstream release: crawl correctness and security fixes (network-facing
+    buffer overflows, file-type detection, redirect handling) and modernized
+    web defaults; full list in history.txt.
+  * Add DEP-12 upstream metadata (#466).
+  * Bump debhelper compat to 14 (#466).
+  * Drop the redundant Priority field and update the NMU lintian override to
+    the current tag names (#466).
+
+ -- Xavier Roche <xavier@debian.org>  Sun, 05 Jul 2026 00:03:18 +0200
+
+httrack (3.49.10-2) unstable; urgency=medium
+
+  * Fix FTBFS: tests/28_local-pause failed instead of skipping when python3 is
+    absent (the local-server tests need python3, which the buildds lack). Add
+    patches/skip-local-pause-test-without-python3.patch to guard the test on
+    python3 up front, like its siblings, so it skips cleanly.
+
+ -- Xavier Roche <xavier@debian.org>  Sun, 28 Jun 2026 20:18:46 +0200
+
+httrack (3.49.10-1) unstable; urgency=medium
+
+  * New upstream release: new download-pacing and URL-handling options plus a
+    batch of crawl and robustness fixes (full list in history.txt).
+  * Rewrite debian/copyright in machine-readable DEP-5 format, crediting the
+    bundled minizip, md5 and coucal sources (#415).
+  * Lead the webhttrack browser dependency with chromium so httrack is not
+    dragged into the firefox-esr autoremoval cascade (#436).
+  * Override the embedded-library lint for the bundled minizip (#419).
+  * Bump Standards-Version to 4.7.4 (no changes required).
+
+ -- Xavier Roche <xavier@debian.org>  Sun, 28 Jun 2026 14:01:53 +0200
+
+httrack (3.49.9-1) unstable; urgency=medium
+
+  * New upstream release: Content-Type and file-type detection fixes (trust a
+    declared Content-Type over a binary URL extension, honor --assume under the
+    delayed type check, keep a known extension against a bogus or empty
+    Content-Type, and avoid an uninitialised read on an empty Content-Type), and
+    restored C++ source-compatibility of the installed headers so reverse
+    dependencies (httraqt) build again.
+
+ -- Xavier Roche <xavier@debian.org>  Sun, 21 Jun 2026 17:59:38 +0200
+
+httrack (3.49.8-2) unstable; urgency=medium
+
+  * Rename libhttrack2 to libhttrack3 to follow the SONAME, which the 3.49.8
+    ABI bump moved to libhttrack.so.3 (package-name-doesnt-match-sonames). In
+    3.49.8-1 the libhttrack2.files glob still matched .so.2, so the runtime
+    libraries fell through into the httrack package and libhttrack2 shipped no
+    library. The new .files uses a .so.3* wildcard so a future SONAME bump no
+    longer silently misplaces the libraries. New binary package, via NEW.
+  * Drop the stale debian/libhttrack-swf1.files: the swf module is no longer
+    built and no libhttrack-swf1 package exists.
+
+ -- Xavier Roche <xavier@debian.org>  Sat, 20 Jun 2026 14:42:13 +0200
+
 httrack (3.49.8-1) unstable; urgency=medium
 
-  * New upstream release.
+  * New upstream release: HTTPS-proxy CONNECT tunnelling and wider srcset
+    parsing, a batch of crawler and parser fixes (CSS @import, xmlns
+    namespaces, relative paths, RFC 6265 cookies), and security hardening of
+    the parser and of buffer copies throughout the engine.
   * Drop the OpenSSL linking exception from the license: OpenSSL 3.0+ is
     Apache-2.0 and GPL-compatible, so it is no longer needed. httrack is now
     plain GPL-3.0-or-later. Updated debian/copyright accordingly.
@@ -8,8 +69,13 @@ 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
+ -- Xavier Roche <xavier@debian.org>  Sat, 20 Jun 2026 13:02:08 +0200
 
 httrack (3.49.7-2) unstable; urgency=medium
 

debian/control

@@ -1,9 +1,8 @@
 Source: httrack
 Section: web
-Priority: optional
 Maintainer: Xavier Roche <roche@httrack.com>
-Standards-Version: 4.7.0
-Build-Depends: debhelper-compat (= 13), autoconf, autoconf-archive, automake, libtool, zlib1g-dev, libssl-dev
+Standards-Version: 4.7.4
+Build-Depends: debhelper-compat (= 14), autoconf, autoconf-archive, automake, libtool, zlib1g-dev, libssl-dev
 Rules-Requires-Root: no
 Homepage: http://www.httrack.com
 Vcs-Git: https://github.com/xroche/httrack.git
@@ -30,7 +29,7 @@ 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, chromium | firefox-esr | www-browser
 Replaces: webhttrack-common (<< 3.43.9-2)
 Breaks: webhttrack-common (<< 3.43.9-2)
 Suggests: httrack, httrack-doc
@@ -58,13 +57,13 @@ Description: webhttrack common files
  This package is the common files of webhttrack, website copier and
  mirroring utility
 
-Package: libhttrack2
+Package: libhttrack3
 Architecture: any
 Multi-Arch: same
 Section: libs
-Replaces: libhttrack1
-Conflicts: libhttrack1
 Depends: ${misc:Depends}, ${shlibs:Depends}
+Replaces: libhttrack2, httrack (<< 3.49.8-2~)
+Breaks: libhttrack2, httrack (<< 3.49.8-2~)
 Description: Httrack website copier library
  This package is the library part of httrack, website copier and mirroring
  utility

debian/copyright

@@ -1,21 +1,109 @@
-This package was debianized by Xavier Roche <roche@httrack.com> on
-Fri, 27 Sep 2002 16:42:26 +0200
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Upstream-Name: httrack
+Upstream-Contact: Xavier Roche <roche@httrack.com>
+Source: https://www.httrack.com/
 
-The current Debian maintainer is Xavier Roche <xavier@debian.org>
+Files: *
+Copyright: 1998-2026 Xavier Roche and other contributors
+License: GPL-3+
+Comment:
+ The engine includes contributions from Yann Philippot (src/htsjava.c,
+ src/htsjava.h). htsbasenet.h links against the system OpenSSL library
+ (originally by Eric Young); no OpenSSL/SSLeay code is bundled here.
 
-Upstream author: Xavier Roche <roche@httrack.com>
+Files: src/minizip/*
+Copyright: 1998-2010 Gilles Vollant
+           2007-2008 Even Rouault
+           2009-2010 Mathias Svensson
+           1990-2000 Info-ZIP
+License: Zlib
+Comment:
+ The decryption code in src/minizip/crypt.h and src/minizip/unzip.c derives
+ from the Info-ZIP distribution, distributed under the same terms.
 
-Copyright: 1998-2014 Xavier Roche and other contributors
+Files: src/md5.c
+Copyright: 1993 Colin Plumb
+License: public-domain-md5
+ This code implements the MD5 message-digest algorithm, due to Ron Rivest.
+ It was written by Colin Plumb in 1993, no copyright is claimed. This code
+ is in the public domain; do with it what you wish.
 
-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.
+Files: src/coucal/*
+Copyright: 2013-2014 Xavier Roche
+License: BSD-3-clause
 
-On Debian systems, the complete text of the GNU General Public
-License version 3 can be found in /usr/share/common-licenses/GPL-3 file.
+Files: src/coucal/murmurhash3.h*
+Copyright: Austin Appleby
+License: public-domain-murmurhash3
+ MurmurHash3 was written by Austin Appleby, and is placed in the public
+ domain. The author hereby disclaims copyright to this source code.
 
-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.
+Files: html/server/div/com.httrack.WebHTTrack.metainfo.xml
+Copyright: 1998-2026 Xavier Roche and other contributors
+License: FSFAP
+ 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 any warranty.
+
+Files: debian/*
+Copyright: 2002-2026 Xavier Roche <xavier@debian.org>
+License: GPL-3+
+
+License: GPL-3+
+ 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 <https://www.gnu.org/licenses/>.
+ .
+ On Debian systems, the complete text of the GNU General Public License
+ version 3 can be found in /usr/share/common-licenses/GPL-3.
+
+License: Zlib
+ This software is provided 'as-is', without any express or implied warranty.
+ In no event will the authors be held liable for any damages arising from the
+ use of this software.
+ .
+ Permission is granted to anyone to use this software for any purpose,
+ including commercial applications, and to alter it and redistribute it
+ freely, subject to the following restrictions:
+ .
+ 1. The origin of this software must not be misrepresented; you must not claim
+    that you wrote the original software. If you use this software in a product,
+    an acknowledgment in the product documentation would be appreciated but is
+    not required.
+ 2. Altered source versions must be plainly marked as such, and must not be
+    misrepresented as being the original software.
+ 3. This notice may not be removed or altered from any source distribution.
+
+License: BSD-3-clause
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met:
+ .
+ 1. Redistributions of source code must retain the above copyright notice,
+    this list of conditions and the following disclaimer.
+ 2. Redistributions in binary form must reproduce the above copyright notice,
+    this list of conditions and the following disclaimer in the documentation
+    and/or other materials provided with the distribution.
+ 3. Neither the name of the copyright holder nor the names of its contributors
+    may be used to endorse or promote products derived from this software
+    without specific prior written permission.
+ .
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ POSSIBILITY OF SUCH DAMAGE.

debian/httrack-doc.lintian-overrides

@@ -4,3 +4,6 @@
 # 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 *
+# search.sh is a sample CGI shipped alongside the HTML manual, not meant to be
+# run from the package tree; it stays non-executable by design.
+httrack-doc: script-not-executable *

debian/libhttrack-swf1.files

@@ -1,2 +0,0 @@
-usr/lib/*/libhtsswf.so.1.0.0
-usr/lib/*/libhtsswf.so.1

debian/libhttrack2.files

@@ -1,5 +0,0 @@
-usr/lib/*/libhttrack.so.2.0.49
-usr/lib/*/libhttrack.so.2
-usr/lib/*/libhtsjava.so.2.0.49
-usr/lib/*/libhtsjava.so.2
-usr/share/httrack/templates

debian/libhttrack2.lintian-overrides

@@ -1,3 +0,0 @@
-# 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/*

debian/libhttrack3.files

@@ -0,0 +1,3 @@
+usr/lib/*/libhttrack.so.3*
+usr/lib/*/libhtsjava.so.3*
+usr/share/httrack/templates

debian/libhttrack3.lintian-overrides

@@ -0,0 +1,8 @@
+# The shared libraries ship without a versioned symbols control file (ABI is
+# tracked via the SONAME plus a >= upstream-version dependency, see debian/rules).
+libhttrack3: no-symbols-control-file usr/lib/*
+
+# Bundled, locally patched minizip (src/minizip): it adds a zipFlush() API the
+# system libminizip lacks (htscache.c flushes the cache .zip so an interrupted
+# crawl leaves a valid archive), plus Android/old-zlib portability fixes.
+libhttrack3: embedded-library *libminizip*

debian/proxytrack.lintian-overrides

@@ -0,0 +1,3 @@
+# Statically linked against httrack's bundled, patched minizip (see src/minizip
+# and libhttrack3's override): the zipFlush() API is absent from the system one.
+proxytrack: embedded-library *libminizip*

debian/rules

@@ -135,7 +135,7 @@ binary-arch: build install
 	dh_makeshlibs -a -X/usr/lib/$(DEB_HOST_MULTIARCH)/httrack/libtest --version-info
 	dh_installdeb -a
 	# we depend on the current version (ABI may change)
-	dh_shlibdeps -a -ldebian/libhttrack2/usr/lib/$(DEB_HOST_MULTIARCH)
+	dh_shlibdeps -a -ldebian/libhttrack3/usr/lib/$(DEB_HOST_MULTIARCH)
 	dh_gencontrol -a
 	dh_md5sums -a
 	dh_builddeb -a

debian/source/lintian-overrides

@@ -1,4 +1,6 @@
-httrack source: changelog-should-mention-nmu
+# Maintainer uploads sign the changelog as xavier@debian.org while the control
+# Maintainer is roche@httrack.com; lintian reads the address mismatch as an NMU.
+httrack source: no-nmu-in-changelog
 httrack source: source-nmu-has-incorrect-version-number
 
 # The bundled HTML pages are the genuine upstream documentation taken from

debian/upstream/metadata

@@ -0,0 +1,6 @@
+---
+Repository: https://github.com/xroche/httrack.git
+Repository-Browse: https://github.com/xroche/httrack
+Bug-Database: https://github.com/xroche/httrack/issues
+Bug-Submit: https://github.com/xroche/httrack/issues/new
+Contact: Xavier Roche <roche@httrack.com>

depcomp

@@ -1,792 +0,0 @@
-#! /bin/sh
-# depcomp - compile a program generating dependencies as side-effects
-
-scriptversion=2024-06-19.01; # UTC
-
-# Copyright (C) 1999-2024 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>.
-GNU Automake home page: <https://www.gnu.org/software/automake/>.
-General help using GNU software: <https://www.gnu.org/gethelp/>.
-EOF
-    exit $?
-    ;;
-  -v | --v*)
-    echo "depcomp (GNU Automake) $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
-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 interference 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 obsolete pre-3.x GCC compilers.
-## but also to in-use compilers like IBM 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
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-    exit $stat
-  fi
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-  # Each non-empty line is of the form 'foo.o : \' or ' dep.h \'.
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-  sed -e "s|.*:|$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 "$tmpdepfile"
-  ;;
-
-## The order of this option in the case statement is important, since the
-## shell code in configure will try each of these formats in the order
-## listed in this file.  A plain '-MD' option would be understood by many
-## compilers, so we must ensure this comes after the gcc and icc options.
-pgcc)
-  # Portland's C compiler understands '-MD'.
-  # Will always output deps to 'file.d' where file is the root name of the
-  # source file under compilation, even if file resides in a subdirectory.
-  # The object file name does not affect the name of the '.d' file.
-  # pgcc 10.2 will output
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-  # and will wrap long lines using '\' :
-  #    foo.o: sub/foo.c ... \
-  #     sub/foo.h ... \
-  #     ...
-  set_dir_from "$object"
-  # Use the source, not the object, to determine the base name, since
-  # that's sadly what pgcc will do too.
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-  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 "$lockdir"
-      break
-    else
-      # If the lock is being held by a different process, wait
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-      while test -d "$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
-  ;;
-
-#nosideeffect)
-  # This comment above is used by automake to tell side-effect
-  # dependency tracking mechanisms from slower ones.
-
-dashmstdout)
-  # Important note: in order to support this mode, a compiler *must*
-  # always write the preprocessed file to stdout, regardless of -o.
-  "$@" || exit $?
-
-  # Remove the call to Libtool.
-  if test "$libtool" = yes; then
-    while test "X$1" != 'X--mode=compile'; do
-      shift
-    done
-    shift
-  fi
-
-  # Remove '-o $object'.
-  IFS=" "
-  for arg
-  do
-    case $arg in
-    -o)
-      shift
-      ;;
-    $object)
-      shift
-      ;;
-    *)
-      set fnord "$@" "$arg"
-      shift # fnord
-      shift # $arg
-      ;;
-    esac
-  done
-
-  test -z "$dashmflag" && dashmflag=-M
-  # Require at least two characters before searching for ':'
-  # in the target name.  This is to cope with DOS-style filenames:
-  # a dependency such as 'c:/foo/bar' could be seen as target 'c' otherwise.
-  "$@" $dashmflag |
-    sed "s|^[$tab ]*[^:$tab ][^:][^:]*:[$tab ]*|$object: |" > "$tmpdepfile"
-  rm -f "$depfile"
-  cat < "$tmpdepfile" > "$depfile"
-  # Some versions of the HPUX 10.20 sed can't process this sed invocation
-  # correctly.  Breaking it into two sed invocations is a workaround.
-  tr ' ' "$nl" < "$tmpdepfile" \
-    | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
-    | sed -e 's/$/ :/' >> "$depfile"
-  rm -f "$tmpdepfile"
-  ;;
-
-dashXmstdout)
-  # This case only exists to satisfy depend.m4.  It is never actually
-  # run, as this mode is specially recognized in the preamble.
-  exit 1
-  ;;
-
-makedepend)
-  "$@" || exit $?
-  # Remove any Libtool call
-  if test "$libtool" = yes; then
-    while test "X$1" != 'X--mode=compile'; do
-      shift
-    done
-    shift
-  fi
-  # X makedepend
-  shift
-  cleared=no eat=no
-  for arg
-  do
-    case $cleared in
-    no)
-      set ""; shift
-      cleared=yes ;;
-    esac
-    if test $eat = yes; then
-      eat=no
-      continue
-    fi
-    case "$arg" in
-    -D*|-I*)
-      set fnord "$@" "$arg"; shift ;;
-    # Strip any option that makedepend may not understand.  Remove
-    # the object too, otherwise makedepend will parse it as a source file.
-    -arch)
-      eat=yes ;;
-    -*|$object)
-      ;;
-    *)
-      set fnord "$@" "$arg"; shift ;;
-    esac
-  done
-  obj_suffix=`echo "$object" | sed 's/^.*\././'`
-  touch "$tmpdepfile"
-  ${MAKEDEPEND-makedepend} -o"$obj_suffix" -f"$tmpdepfile" "$@"
-  rm -f "$depfile"
-  # makedepend may prepend the VPATH from the source file name to the object.
-  # No need to regex-escape $object, excess matching of '.' is harmless.
-  sed "s|^.*\($object *:\)|\1|" "$tmpdepfile" > "$depfile"
-  # Some versions of the HPUX 10.20 sed can't process the last invocation
-  # correctly.  Breaking it into two sed invocations is a workaround.
-  sed '1,2d' "$tmpdepfile" \
-    | tr ' ' "$nl" \
-    | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
-    | sed -e 's/$/ :/' >> "$depfile"
-  rm -f "$tmpdepfile" "$tmpdepfile".bak
-  ;;
-
-cpp)
-  # Important note: in order to support this mode, a compiler *must*
-  # always write the preprocessed file to stdout.
-  "$@" || exit $?
-
-  # Remove the call to Libtool.
-  if test "$libtool" = yes; then
-    while test "X$1" != 'X--mode=compile'; do
-      shift
-    done
-    shift
-  fi
-
-  # Remove '-o $object'.
-  IFS=" "
-  for arg
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-    case $arg in
-    -o)
-      shift
-      ;;
-    $object)
-      shift
-      ;;
-    *)
-      set fnord "$@" "$arg"
-      shift # fnord
-      shift # $arg
-      ;;
-    esac
-  done
-
-  "$@" -E \
-    | sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
-             -e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
-    | sed '$ s: \\$::' > "$tmpdepfile"
-  rm -f "$depfile"
-  echo "$object : \\" > "$depfile"
-  cat < "$tmpdepfile" >> "$depfile"
-  sed < "$tmpdepfile" '/^$/d;s/^ //;s/ \\$//;s/$/ :/' >> "$depfile"
-  rm -f "$tmpdepfile"
-  ;;
-
-msvisualcpp)
-  # Important note: in order to support this mode, a compiler *must*
-  # always write the preprocessed file to stdout.
-  "$@" || exit $?
-
-  # Remove the call to Libtool.
-  if test "$libtool" = yes; then
-    while test "X$1" != 'X--mode=compile'; do
-      shift
-    done
-    shift
-  fi
-
-  IFS=" "
-  for arg
-  do
-    case "$arg" in
-    -o)
-      shift
-      ;;
-    $object)
-      shift
-      ;;
-    "-Gm"|"/Gm"|"-Gi"|"/Gi"|"-ZI"|"/ZI")
-        set fnord "$@"
-        shift
-        shift
-        ;;
-    *)
-        set fnord "$@" "$arg"
-        shift
-        shift
-        ;;
-    esac
-  done
-  "$@" -E 2>/dev/null |
-  sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::\1:p' | $cygpath_u | sort -u > "$tmpdepfile"
-  rm -f "$depfile"
-  echo "$object : \\" > "$depfile"
-  sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::'"$tab"'\1 \\:p' >> "$depfile"
-  echo "$tab" >> "$depfile"
-  sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::\1\::p' >> "$depfile"
-  rm -f "$tmpdepfile"
-  ;;
-
-msvcmsys)
-  # This case exists only to let depend.m4 do its work.  It works by
-  # looking at the text of this script.  This case will never be run,
-  # since it is checked for above.
-  exit 1
-  ;;
-
-none)
-  exec "$@"
-  ;;
-
-*)
-  echo "Unknown depmode $depmode" 1>&2
-  exit 1
-  ;;
-esac
-
-exit 0
-
-# 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:

fuzz/Makefile.am

@@ -0,0 +1,38 @@
+# libFuzzer harnesses; built only with --enable-fuzzers (requires clang).
+if FUZZERS
+noinst_PROGRAMS = fuzz-charset fuzz-meta fuzz-idna fuzz-entities \
+	fuzz-unescape fuzz-filters fuzz-url
+endif
+
+AM_CPPFLAGS = \
+	@DEFAULT_CFLAGS@ \
+	@THREADS_CFLAGS@ \
+	@V6_FLAG@ \
+	@LFS_FLAG@ \
+	-I$(top_srcdir)/src \
+	-I$(top_srcdir)/src/coucal
+
+# Static-link libhttrack.la: the internal symbols are hidden in the .so.
+AM_LDFLAGS = @DEFAULT_LDFLAGS@ -fsanitize=fuzzer -static-libtool-libs
+LDADD = $(top_builddir)/src/libhttrack.la $(THREADS_LIBS)
+
+fuzz_charset_SOURCES = fuzz-charset.c fuzz.h
+fuzz_meta_SOURCES = fuzz-meta.c fuzz.h
+fuzz_idna_SOURCES = fuzz-idna.c fuzz.h
+fuzz_entities_SOURCES = fuzz-entities.c fuzz.h
+fuzz_unescape_SOURCES = fuzz-unescape.c fuzz.h
+fuzz_filters_SOURCES = fuzz-filters.c fuzz.h
+fuzz_url_SOURCES = fuzz-url.c fuzz.h
+
+# List corpus files explicitly: automake does not expand EXTRA_DIST globs.
+EXTRA_DIST = README.md run-fuzzers.sh \
+	corpus/charset/utf8.txt corpus/charset/latin1.txt corpus/charset/sjis.txt \
+	corpus/meta/meta-charset.html corpus/meta/meta-http-equiv.html \
+	corpus/idna/idna.txt corpus/idna/unicode.txt \
+	corpus/idna/regress-multilabel-leak.txt \
+	corpus/entities/entities.txt \
+	corpus/unescape/percent.txt \
+	corpus/filters/filter.bin corpus/filters/filter-size.bin \
+	corpus/filters/regress-empty-subject-unique.bin \
+	corpus/url/http-url.txt corpus/url/relative-path.txt \
+	corpus/url/regress-file-empty-path.txt corpus/url/regress-long-path-abort.txt

fuzz/README.md

@@ -0,0 +1,15 @@
+# Fuzzing httrack
+
+libFuzzer harnesses for the pure hostile-input parsers (charset/UTF-8/IDNA codecs, entity and percent decoders, wildcard filters, URL splitter). Off by default; needs clang.
+
+```sh
+./bootstrap
+mkdir /var/tmp/bld-fuzz && cd /var/tmp/bld-fuzz
+CC=clang CFLAGS="-fsanitize=address,undefined -fno-sanitize-recover=all -g -O1" \
+  LDFLAGS="-fsanitize=address,undefined" \
+  bash /path/to/httrack/configure --enable-fuzzers --disable-shared
+make
+bash /path/to/httrack/fuzz/run-fuzzers.sh fuzz 60   # 60s per target
+```
+
+Run one target by hand: `fuzz/fuzz-url -max_total_time=300 corpusdir fuzz/corpus/url`. Seed corpora live in `corpus/<target>/`; a crash reproducer is replayed with `fuzz/fuzz-url crash-file`.

fuzz/corpus/charset/latin1.txt

@@ -0,0 +1 @@
+
café naďve ¤

fuzz/corpus/charset/sjis.txt

@@ -0,0 +1 @@
+コンピュータ

fuzz/corpus/entities/entities.txt

@@ -0,0 +1 @@
+&<>A☃é&notarealentity;�

fuzz/corpus/filters/regress-empty-subject-unique.bin

@@ -0,0 +1 @@
+**((

fuzz/corpus/idna/idna.txt

@@ -0,0 +1 @@
+xn--bcher-kva.example.com

fuzz/corpus/idna/regress-multilabel-leak.txt

@@ -0,0 +1 @@
+büchev.例å­bücheple

fuzz/corpus/idna/unicode.txt

@@ -0,0 +1 @@
+bücher.例子.example

fuzz/corpus/meta/meta-charset.html

@@ -0,0 +1 @@
+<html><head><meta charset="utf-8"></head><body>x</body></html>

fuzz/corpus/meta/meta-http-equiv.html

@@ -0,0 +1 @@
+<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">

fuzz/corpus/unescape/percent.txt

@@ -0,0 +1 @@
+%41%zz%%20%c3%a9+%2e%2e%2f

fuzz/corpus/url/http-url.txt

@@ -0,0 +1 @@
+http://user:pass@www.example.com:8080/a/b/../c/./d.html?q=1#frag

fuzz/corpus/url/regress-file-empty-path.txt

@@ -0,0 +1 @@
+file://

fuzz/corpus/url/regress-long-path-abort.txt

@@ -0,0 +1 @@
+ftpumŠ[/../e0O/../itpumÙ/ftpumŠ[/../e0O/../itpumÙ<6D>Š[/../O/../f9O_i<5F>W/../O/../90O/../itpumÙ/ftpumŠ[/../e0O/../itpumÙ<6D>Š[/.../e0O/../itpumÙ<6D>Š[/../O/../f9O_i<5F>W/.¿ù../O/../9O_imÙ<6D>Š<EFBFBD>W/../_/../../e0O/../f9O_./f9O_i<5F>W/../O/../90O/./e0O/../itpumÙ<6D>Š[/../O/../f9O_i<5F>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/../../e/../f9OmÙ<6D>Š<EFBFBD>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/..O_imÙ<6D>Š<EFBFBD>W/../O/../../e0O/../f9O_imÙ<6D>Š<EFBFBD>W/../O/.._i<5F>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/../../e0O/../f9O_i/../O/../f9O_i<5F>W/../O/../90O/../itpumÙ/ftpumŠ[/../e0O/../itpumÙ<6D>Š[/../O/../f9O_i<5F>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/../../e0O/../f9OmÙ<6D>Š<EFBFBD>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/..O_imÙ<6D>Š<EFBFBD>W//O/../f9O_i../f9O_i<5F>W/../O/../90O/../itpumÙ/ftpumŠ[/../e0O/../itpumÙ<6D>Š[/.../e0O/../itpumÙ<6D>Š[/../O/../f9O_i<5F>W/.¿ù../O/../9O_imÙ<6D>Š<EFBFBD>W/../_/../../e0O/../f9O_./f9O_i<5F>W/../O/../90O/./e0O/../itpumÙ<6D>Š[/../O/../f9O_i<5F>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/../../e/../f9OmÙ<6D>Š<EFBFBD>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/..O_imÙ<6D>Š<EFBFBD>W/../O/../../e0O/../f9O_imÙ<6D>Š<EFBFBD>W/../O/.._i<5F>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/../../e0O/../f9O_i/../O/../f9O_i<5F>W/../O/../90O/../itpumÙ/ftpumŠ[/../e0O/../itpumÙ<6D>Š[/../O/../f9O_i<5F>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/../../e0O/../f9OmÙ<6D>Š<EFBFBD>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/..O_imÙ<6D>Š<EFBFBD>W//O/../f9O_i<5F>W/.¿ù../O/../9O_imÙ<6D>Š<EFBFBD>W/../_/../../e0O/../f9O_./f9O_i<5F>W/../O/../90O/./e0O/../itpumÙ<6D>Š[/../O/../f9O_i<5F>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/../../e/../f9OmÙ<6D>Š<EFBFBD>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/..O_imÙ<6D>Š<EFBFBD>W/../O/../../e0O/../f9O_imÙ<6D>Š<EFBFBD>W/../O/.._f9O_i../f9O_i<5F>W/../O/../90O/../itpumÙ/ftpumŠ[/../e0O/../itpumÙ<6D>Š[/.../e0O/../itpumÙ<6D>Š[/../O/../f9O_i<5F>W/.¿ù../O/../9O_imÙ<6D>Š<EFBFBD>W/../_/../../e0O/../f9O_./f9O_i<5F>W/../O/../90O/./e0O/../itpumÙ<6D>Š[/../O/../f9O_i<5F>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/../../e/../f9OmÙ<6D>Š<EFBFBD>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/..O_imÙ<6D>Š<EFBFBD>W/../O/../../e0O/../f9O_imÙ<6D>Š<EFBFBD>W/../O/.._i<5F>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/../../e0O/../f9O_i/../O/../f9O_i<5F>W/../O/../90O/../itpumÙ/ftpumŠ[/../e0O/../itpumÙ<6D>Š[/../O/../f9O_i<5F>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/../../e0O/../f9OmÙ<6D>Š<EFBFBD>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/..O_imÙ<6D>Š<EFBFBD>W//O/../f9O_i<5F>W/.¿ù../O/../9O_imÙ<6D>Š<EFBFBD>W/../_/../../e0O/../f9O_./f9O_i<5F>W/../O/../90O/./e0O/../itpumÙ<6D>Š[/../O/../f9O_i<5F>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/../../e/../f9OmÙ<6D>Š<EFBFBD>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/..O_imÙ<6D>Š<EFBFBD>W/../O/../../e0O/../f9O_imÙ<6D>Š<EFBFBD>W/../O/.._i<5F>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/../../e0O/../f9O_i/../O/../f9O_i<5F>W/../O/../90O/../itpumÙ/ftpumŠ[/../e0O/../itpumÙ<6D>Š[/../O/../f9O_i<5F>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/i<>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/../../e0O/../f9O_i/../O/../f9O_i<5F>W/../O/../90O/../itpumÙ/ftpumŠ[/../e0O/../itpumÙ<6D>Š[/../O/../f9O_i<5F>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/../../e0O/../f9OmÙ<6D>Š<EFBFBD>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/..O_im<69>W/.¿ù../O/../9O_imÙ<6D>Š<EFBFBD>W/../_/../../e0O/../f9O_./f9O_i<5F>W/../O/../90O/./e0O/../itpumÙ<6D>Š[/../O/../f9O_i<5F>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/../../e/../f9OmÙ<6D>Š<EFBFBD>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/..O_imÙ<6D>Š<EFBFBD>W/../O/../../e0O/../f9O_imÙ<6D>Š<EFBFBD>W/../O/.._i<5F>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/../../e0O/../f9O_i/../O/../f9O_i<5F>W/../O/../90O/../itpumÙ/ftpumŠ[/../e0O/../itpumÙ<6D>Š[/../O/../f9O_i<5F>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/../../e0O/../f9OmÙ<6D>Š<EFBFBD>W/../O/../9O_imÙ<6D>Š<EFBFBD>W/../O/..O_imÙ<6D>Š<EFBFBD>W/../O/../../e0O/9O_imÙ<6D>Š<EFBFBD>W/../O/../

fuzz/corpus/url/relative-path.txt

@@ -0,0 +1 @@
+ftp://ftp.example.com/pub/../file.txt

fuzz/fuzz-charset.c

@@ -0,0 +1,84 @@
+/* ------------------------------------------------------------ */
+/*
+HTTrack Website Copier, Offline Browser for Windows and Unix
+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
+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
+*/
+
+/* Fuzz the charset codecs: hts_convertStringToUTF8/FromUTF8 and the
+   UTF-8/UCS4 primitives (htscharset.c). First input byte picks the charset. */
+#include "fuzz.h"
+#include "htscharset.h"
+
+static const char *const charsets[] = {
+    "utf-8",    "iso-8859-1", "iso-8859-2", "iso-8859-15", "windows-1252",
+    "us-ascii", "shift_jis",  "euc-jp",     "iso-2022-jp", "gb2312",
+    "big5",     "euc-kr",     "koi8-r",     "utf-16",      "unknown-charset",
+};
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+  const char *charset;
+  char *s;
+
+  if (size == 0)
+    return 0;
+  charset = charsets[data[0] % (sizeof(charsets) / sizeof(charsets[0]))];
+  data++, size--;
+  s = fuzz_strdup(data, size);
+
+  {
+    char *utf8 = hts_convertStringToUTF8(s, size, charset);
+    freet(utf8);
+  }
+  {
+    char *enc = hts_convertStringFromUTF8(s, size, charset);
+    freet(enc);
+  }
+  {
+    size_t nChars = 0;
+    hts_UCS4 *ucs = hts_convertUTF8StringToUCS4(s, size, &nChars);
+
+    if (ucs != NULL) {
+      char *back = hts_convertUCS4StringToUTF8(ucs, nChars);
+      freet(back);
+      freet(ucs);
+    }
+  }
+  {
+    size_t i = 0;
+
+    while (i < size) {
+      hts_UCS4 uc = 0;
+      const size_t nr = hts_readUTF8(s + i, size - i, &uc);
+      char out[8];
+
+      if (nr == 0)
+        break;
+      hts_writeUTF8(uc, out, sizeof(out));
+      i += nr;
+    }
+  }
+
+  freet(s);
+  return 0;
+}

fuzz/fuzz-entities.c

@@ -0,0 +1,51 @@
+/* ------------------------------------------------------------ */
+/*
+HTTrack Website Copier, Offline Browser for Windows and Unix
+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
+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
+*/
+
+/* Fuzz the HTML entity decoder (htsencoding.c). First input byte picks the
+   destination size, so truncation bounds get exercised too. */
+#include "fuzz.h"
+#include "htsencoding.h"
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+  static const size_t dsizes[] = {1, 2, 8, 64, 4096};
+  size_t dsize;
+  char *src, *dest;
+
+  if (size == 0)
+    return 0;
+  dsize = dsizes[data[0] % (sizeof(dsizes) / sizeof(dsizes[0]))];
+  data++, size--;
+  src = fuzz_strdup(data, size);
+  dest = malloct(dsize);
+
+  (void) hts_unescapeEntities(src, dest, dsize);
+  (void) hts_unescapeEntitiesWithCharset(src, dest, dsize, "iso-8859-1");
+
+  freet(dest);
+  freet(src);
+  return 0;
+}

fuzz/fuzz-filters.c

@@ -0,0 +1,65 @@
+/* ------------------------------------------------------------ */
+/*
+HTTrack Website Copier, Offline Browser for Windows and Unix
+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
+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
+*/
+
+/* Fuzz the wildcard filter matcher (htsfilters.c; #148 bracket-range OOB was
+   here). Input splits on the first NUL: pattern, then subject string. */
+#include "fuzz.h"
+#include "htsfilters.h"
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+  char *buf = fuzz_strdup(data, size);
+  const char *joker = buf;
+  const uint8_t *sep = memchr(data, '\0', size);
+  /* subject in its own allocation so ASan bounds it apart from the pattern */
+  char *nom = sep != NULL ? fuzz_strdup(sep + 1, (data + size) - (sep + 1))
+                          : fuzz_strdup(data + size, 0);
+
+  (void) strjoker(nom, joker, NULL, NULL);
+  {
+    LLint sz = (LLint) size;
+    int size_flag = 0;
+
+    (void) strjoker(nom, joker, &sz, &size_flag);
+  }
+  (void) strjokerfind(nom, joker);
+  {
+    char *filter = malloct(strlen(joker) + 2);
+    char *filters[1];
+    LLint sz = (LLint) size;
+    int size_flag = 0, depth = 0;
+
+    filter[0] = '-';
+    memcpy(filter + 1, joker, strlen(joker) + 1);
+    filters[0] = filter;
+    (void) fa_strjoker(0, filters, 1, nom, &sz, &size_flag, &depth);
+    freet(filter);
+  }
+
+  freet(nom);
+  freet(buf);
+  return 0;
+}

fuzz/fuzz-idna.c

@@ -0,0 +1,47 @@
+/* ------------------------------------------------------------ */
+/*
+HTTrack Website Copier, Offline Browser for Windows and Unix
+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
+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
+*/
+
+/* Fuzz the IDNA/punycode codec (htscharset.c, CVE-prone lineage). */
+#include "fuzz.h"
+#include "htscharset.h"
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+  char *s = fuzz_strdup(data, size);
+
+  {
+    char *idna = hts_convertStringUTF8ToIDNA(s, size);
+    freet(idna);
+  }
+  {
+    char *utf8 = hts_convertStringIDNAToUTF8(s, size);
+    freet(utf8);
+  }
+  (void) hts_isStringIDNA(s, size);
+
+  freet(s);
+  return 0;
+}

fuzz/fuzz-meta.c

@@ -0,0 +1,40 @@
+/* ------------------------------------------------------------ */
+/*
+HTTrack Website Copier, Offline Browser for Windows and Unix
+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
+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
+*/
+
+/* Fuzz hts_getCharsetFromMeta (htscharset.c): scans raw attacker HTML for a
+   <meta> charset declaration. */
+#include "fuzz.h"
+#include "htscharset.h"
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+  char *html = fuzz_strdup(data, size);
+  char *charset = hts_getCharsetFromMeta(html, size);
+
+  freet(charset);
+  freet(html);
+  return 0;
+}

fuzz/fuzz-unescape.c

@@ -0,0 +1,53 @@
+/* ------------------------------------------------------------ */
+/*
+HTTrack Website Copier, Offline Browser for Windows and Unix
+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
+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
+*/
+
+/* Fuzz the URL percent-decoders (htslib.c). First input byte picks the
+   output buffer size, so the bounded-copy contract is exercised. */
+#include "fuzz.h"
+#include "httrack-library.h"
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+  static const size_t bsizes[] = {1, 2, 16, 256, 8192};
+  size_t bsize;
+  char *s, *catbuff;
+
+  if (size == 0)
+    return 0;
+  bsize = bsizes[data[0] % (sizeof(bsizes) / sizeof(bsizes[0]))];
+  data++, size--;
+  s = fuzz_strdup(data, size);
+  catbuff = malloct(bsize);
+
+  (void) unescape_http(catbuff, bsize, s);
+  (void) unescape_http_unharm(catbuff, bsize, s, 0);
+  (void) unescape_http_unharm(catbuff, bsize, s, 1);
+  unescape_amp(s);
+
+  freet(catbuff);
+  freet(s);
+  return 0;
+}

fuzz/fuzz-url.c

@@ -0,0 +1,49 @@
+/* ------------------------------------------------------------ */
+/*
+HTTrack Website Copier, Offline Browser for Windows and Unix
+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
+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
+*/
+
+/* Fuzz the URL splitter and path normalizer (htslib.c): ident_url_absolute
+   is the first parser to touch a raw URL; fil_simplifie collapses ./ and ../
+   in place. */
+#include "fuzz.h"
+#include "htscore.h"
+#include "htslib.h"
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+  char *s = fuzz_strdup(data, size);
+  lien_adrfil *af = calloct(1, sizeof(*af));
+  /* fil_simplifie rewrites in place and may grow an empty path to "./" */
+  char *path = malloct(size + 3);
+
+  (void) ident_url_absolute(s, af);
+  memcpy(path, s, size + 1);
+  fil_simplifie(path);
+
+  freet(path);
+  freet(af);
+  freet(s);
+  return 0;
+}

fuzz/fuzz.h

@@ -0,0 +1,51 @@
+/* ------------------------------------------------------------ */
+/*
+HTTrack Website Copier, Offline Browser for Windows and Unix
+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
+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
+*/
+
+/* Shared helpers for the libFuzzer harnesses. */
+#ifndef FUZZ_H
+#define FUZZ_H
+
+#define HTS_INTERNAL_BYTECODE
+
+#include <stddef.h>
+#include <stdint.h>
+#include <string.h>
+
+#include "htsbase.h"
+
+/* Heap NUL-terminated copy of the fuzzer input, so ASan bounds every read. */
+static char *fuzz_strdup(const uint8_t *data, size_t size) {
+  char *s = malloct(size + 1);
+
+  memcpy(s, data, size);
+  s[size] = '\0';
+  return s;
+}
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
+
+#endif

fuzz/run-fuzzers.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+# Drive every built harness against its seed corpus.
+#   run-fuzzers.sh <build-fuzz-dir> check       deterministic replay (CI smoke)
+#   run-fuzzers.sh <build-fuzz-dir> [seconds]   timed mutation run (discovery)
+# Replay is crash/leak-only and never mutates, so it can't hit strjoker's
+# catastrophic backtracking; the timed mode can, hence the per-unit -timeout.
+set -euo pipefail
+
+srcdir=$(cd "$(dirname "$0")" && pwd)
+bld=${1:?usage: run-fuzzers.sh <build-fuzz-dir> [check|seconds]}
+mode=${2:-20}
+
+status=0
+for f in "$bld"/fuzz-*; do
+    if [ ! -f "$f" ] || [ ! -r "$f" ]; then continue; fi
+    case "$f" in *.o | *.c | *.dSYM) continue ;; esac
+    name=$(basename "$f")
+    corpus="$srcdir/corpus/${name#fuzz-}"
+    if [ "$mode" = "check" ]; then
+        echo "=== $name (replay) ==="
+        [ -d "$corpus" ] || continue
+        if ! "$f" -runs=0 -timeout=25 -rss_limit_mb=2048 "$corpus"; then
+            echo "*** $name FAILED on its corpus" >&2
+            status=1
+        fi
+        continue
+    fi
+    work=$(mktemp -d)
+    args=("$work")
+    [ -d "$corpus" ] && args+=("$corpus")
+    echo "=== $name (${mode}s) ==="
+    if ! "$f" -max_total_time="$mode" -timeout=25 -rss_limit_mb=2048 \
+        -artifact_prefix="$work/" -print_final_stats=1 "${args[@]}"; then
+        echo "*** $name FAILED; artifacts:" >&2
+        ls -l "$work" >&2
+        status=1
+    else
+        rm -rf "$work"
+    fi
+done
+exit $status

history.txt

@@ -4,13 +4,73 @@ HTTrack Website Copier release history:
 
 This file lists all changes and fixes that have been made for HTTrack
 
+3.49-11
++ New: parse robots.txt Allow rules and path wildcards per RFC 9309 (#452)
++ New: advertise deflate in Accept-Encoding and decode deflate responses (#450)
++ New: follow <source> and <track> media elements as embedded links (#451)
++ New: added modern web MIME types to the type/extension table (#448)
++ Fixed: enforce the -E time limit during a slow transfer instead of only between files (#481)
++ Fixed: sniff the leading bytes of a download so a misdeclared Content-Type no longer renames a correct URL extension
++ Fixed: fast transfers could be saved under their temporary .delayed placeholder name (#5, #107)
++ Fixed: follow a redirect that maps to the same saved file instead of writing a self-pointing stub (#159)
++ Fixed: several network-facing buffer overflows in the FTP, Java and HTML parsers
++ Fixed: the htsjava plugin could not be loaded (hidden entry points, stale library name)
++ Fixed: HTML-escape truncation and a cache-buffer leak in the parser
++ Changed: modernized the default User-Agent to an honest HTTrack identifier (#449)
++ Changed: decode the full WHATWG set of HTML named character references (#443)
++ Changed: refreshed stale HTTP status, proxy-port and TLS-floor constants (#453)
++ Changed: multiple internal hardening, build, test and CI improvements
+
+3.49-10
++ New: --cookies-file to preload a Netscape cookies.txt before crawling (#215)
++ New: --pause to space out file downloads by a random delay (#185)
++ New: --strip-query to drop selected query keys from the dedup naming (#112)
++ Changed: split the -%u URL hacks into independent --keep-www-prefix, --keep-double-slashes and --keep-query-order toggles (#271)
++ Fixed: follow a redirect Location after dropping its #fragment, instead of requesting the fragment and polluting the saved name (#204)
++ Fixed: escaped brackets inside a *[...] filter character class (#148)
++ Fixed: honor the server's Content-Range when resuming a partial download, instead of appending overlapping bytes (#198)
++ Fixed: abort the download as soon as the response type is excluded by -mime:, instead of fetching then discarding the body (#58)
++ Fixed: keep size-based filter rules neutral until the file size is known (#143)
++ Fixed: stop the mirror with a clean fatal error on a cache write failure, instead of crashing (#174, #219)
++ Fixed: stop the 412/416 partial re-get loop on --continue and --update (#206)
++ Fixed: keep an unrecognized URL tail instead of mangling it to .html (#115)
++ Fixed: honor --tolerant (-%B) on a broken Content-Length, and fix an out-of-bounds read it exposed (#32, #41)
++ Fixed: fall back to the next resolved address when a connection fails or stalls, instead of hanging on a dead IPv6 address
++ Fixed: report why a -%L URL list could not be loaded (#49)
++ Changed: multiple internal hardening, build and CI improvements
+
+.49-9
++ Fixed: file-type detection from the Content-Type header: trust a declared type over a binary URL extension, honor --assume under the delayed type check, and keep a known extension against a bogus or empty Content-Type (#267, #29, #56)
++ Fixed: an uninitialized-buffer read when the Content-Type is empty (#411)
++ Fixed: restored C++ source-compatibility of the installed headers so reverse dependencies (httraqt) build again (#413)
++ Changed: multiple internal build, packaging and test-harness improvements
+
 3.49-8
++ New: tunnel HTTPS downloads through the configured HTTP proxy via CONNECT (#85)
++ New: parse every candidate URL in <img> and <source> srcset lists (#326)
 + Changed: dropped the obsolete OpenSSL linking exception (OpenSSL 3.0+ is Apache-2.0 and GPL-compatible); httrack is now plain GPLv3-or-later
-+ Fixed: link libhtsjava and the libtest examples directly against libc
++ Fixed: several out-of-bounds reads in the HTML/CSS parser on hostile input (#94, #396)
++ Fixed: stored XSS via an unescaped URL in the generated page footer (#165)
++ Fixed: hardened buffer copies throughout the engine against overflow
++ Fixed: capture conditional CSS @import URLs (#94)
++ Fixed: don't crawl xmlns namespace declarations as links (#191)
++ Fixed: don't mistake the method argument of XMLHttpRequest.open for a URL (#218)
++ Fixed: percent-encode parentheses when rewriting CSS url() targets (#163)
++ Fixed: collapse ../ in file:// URLs and widen relative-link handling (#137, #162)
++ Fixed: drop the obsolete $Version/$Path attributes from the request Cookie header, per RFC 6265 (#151)
++ Fixed: keep empty quoted arguments when reloading doit.log for --update/--continue (#106)
++ Fixed: raise the User-Agent and custom-header length limits (#152)
++ Fixed: abort on a long log path (lock-file buffer too small) (#183)
++ Fixed: race in lazy mutex initialization (#297)
++ Fixed: sub-second mtime precision when comparing local files on POSIX (#383)
++ Fixed: modernize OpenSSL TLS initialization for the 3.x to 4.x transition (#308)
 + Fixed: in-place changes made by the postprocess callback were not applied (Roman Sęk)
 + Fixed: "preffered" typo in the help text and man page (yosinn1-blip)
 + Fixed: corrections and updates of the Russian translation (German Aizek)
 + Fixed: corrections and updates of the Danish translation (scootergrisen)
++ Fixed: link libhtsjava and the libtest examples directly against libc
++ New: documented the public library API headers and typed the option fields as named enums
++ Fixed: numerous build, packaging, CI and test-coverage improvements (out-of-tree builds, sanitizer/distcheck CI, shell and Python linting, AppStream metainfo)
 
 3.49-7
 + Fixed: keep generated config.h architecture-independent (Debian #1133728)

html/Makefile.in

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-	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-MetaInfoDATA \
-	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:
-
-# Tell GNU make to disable its built-in pattern rules.
-%:: %,v
-%:: RCS/%,v
-%:: RCS/%
-%:: s.%
-%:: SCCS/s.%

html/div/search.sh

@@ -1,8 +1,7 @@
-
 #!/bin/sh
 
 # Simple indexing test using HTTrack
-# A "real" script/program would use advanced search, and 
+# A "real" script/program would use advanced search, and
 # use dichotomy to find the word in the index.txt file
 # This script is really basic and NOT optimized, and
 # should not be used for professional purpose :)
@@ -11,50 +10,49 @@ TESTSITE="http://localhost/"
 
 # Create an index if necessary
 if ! test -f "index.txt"; then
-	echo "Building the index .."
-	rm -rf test
-	httrack --display "$TESTSITE"  -%I -O test
-	mv test/index.txt ./
+    echo "Building the index .."
+    rm -rf test
+    httrack --display "$TESTSITE" -%I -O test
+    mv test/index.txt ./
 fi
 
 # Convert crlf to lf
-if test "`head index.txt -n 1 | tr '\r' '#' | grep -c '#'`" = "1"; then
-	echo "Converting index to Unix LF style (not CR/LF) .."
-	mv -f index.txt index.txt.old
-	cat index.txt.old|tr -d '\r' > index.txt
+if test "$(head index.txt -n 1 | tr '\r' '#' | grep -c '#')" = "1"; then
+    echo "Converting index to Unix LF style (not CR/LF) .."
+    mv -f index.txt index.txt.old
+    tr -d '\r' <index.txt.old >index.txt
 fi
 
 keyword=-
 while test -n "$keyword"; do
-	printf "Enter a keyword: "
-	read keyword
+    printf "Enter a keyword: "
+    read -r keyword
 
-	if test -n "$keyword"; then
-		FOUNDK="`grep -niE \"^$keyword\" index.txt`"
+    if test -n "$keyword"; then
+        FOUNDK="$(grep -niE "^$keyword" index.txt)"
 
-		if test -n "$FOUNDK"; then	
-			if ! test `echo "$FOUNDK"|wc -l` = "1"; then
-				# Multiple matches
-				printf "Found multiple keywords: "
-				echo "$FOUNDK"|cut -f2 -d':'|tr '\n' ' '
-				echo ""
-				echo "Use keyword$ to find only one"
-			else
-				# One match
-				N=`echo "$FOUNDK"|cut -f1 -d':'`
-				PM=`tail +$N index.txt|grep -nE "\("|head -n 1`
-				if ! echo "$PM"|grep "ignored">/dev/null; then
-					M=`echo $PM|cut -f1 -d':'`
-					echo "Found in:"
-					cat index.txt | tail "+$N" | head -n "$M" | grep -E "[0-9]* " | cut -f2 -d' '
-				else
-					echo "keyword ignored (too many hits)"
-				fi
-					fi
-		else
-			echo "not found"
-		fi
+        if test -n "$FOUNDK"; then
+            if ! test "$(echo "$FOUNDK" | wc -l)" = "1"; then
+                # Multiple matches
+                printf "Found multiple keywords: "
+                echo "$FOUNDK" | cut -f2 -d':' | tr '\n' ' '
+                echo ""
+                echo "Use keyword$ to find only one"
+            else
+                # One match
+                N=$(echo "$FOUNDK" | cut -f1 -d':')
+                PM=$(tail "+$N" index.txt | grep -nE "\(" | head -n 1)
+                if ! echo "$PM" | grep "ignored" >/dev/null; then
+                    M=$(echo "$PM" | cut -f1 -d':')
+                    echo "Found in:"
+                    tail "+$N" index.txt | head -n "$M" | grep -E "[0-9]* " | cut -f2 -d' '
+                else
+                    echo "keyword ignored (too many hits)"
+                fi
+            fi
+        else
+            echo "not found"
+        fi
 
-	fi
+    fi
 done
-

html/filters.html

@@ -247,7 +247,7 @@ See also: The <a href="faq.html#VF1">FAQ</a><br>
         <td>the \ character</td>
       </tr>
       <tr>
-        <td nowrap><tt>*[\[\]]</tt></td>
+        <td nowrap><tt>*[\[,\]]</tt></td>
         <td>the [ or ] character</td>
       </tr>
       <tr>

install-sh

@@ -1,541 +0,0 @@
-#!/bin/sh
-# install - install a program, script, or datafile
-
-scriptversion=2024-06-19.01; # 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.
-
-Report bugs to <bug-automake@gnu.org>.
-GNU Automake home page: <https://www.gnu.org/software/automake/>.
-General help using GNU software: <https://www.gnu.org/gethelp/>."
-
-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 (GNU Automake) $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 $ret
-	' 0
-
-	# Because "mkdir -p" follows existing symlinks and we likely work
-	# directly in world-writable /tmp, make sure that the '$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 "$dir_arg" || {
-	       # Check for POSIX incompatibility with -m.
-	       # HP-UX 11.23 and IRIX 6.5 mkdir -m -p sets group- or
-	       # other-writable bit of parent directory when it shouldn't.
-	       # FreeBSD 6.1 mkdir -m -p sets mode of existing directory.
-	       test_tmpdir="$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/English.txt

@@ -295,7 +295,7 @@ Max Depth
 Maximum external depth:
 Maximum external depth:
 Filters (refuse/accept links) :
-Filters (refuse/accept links) :
+Filters (refuse/accept links):
 Paths
 Paths
 Save prefs

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-%:: SCCS/s.%

lang/README.md

@@ -0,0 +1,37 @@
+# Translating HTTrack
+
+Interface strings live here, one `.txt` file per language. `English.txt` is the reference: every other file maps each English string to its translation.
+
+## File format
+
+Plain text, entries in consecutive pairs of lines:
+
+```
+<English string>
+<translation>
+```
+
+The first line of a pair is the lookup key and must stay identical to the one in `English.txt`; translate only the second line. Missing entries fall back to the English text at runtime, so a partial translation works.
+
+Preserve any `\r\n`, `\t` and `printf` placeholders (`%s`, `%d`, ...) in the translation.
+
+A few `LANGUAGE_*` entries at the top describe the file itself:
+
+| Key | Meaning |
+| --- | --- |
+| `LANGUAGE_NAME` | Name shown in the language picker, in its own language (`Deutsch`, not `German`) |
+| `LANGUAGE_ISO` | ISO 639 code, with region if needed (`de`, `pt_BR`) |
+| `LANGUAGE_CHARSET` | Encoding the file is saved in (`ISO-8859-1`, `windows-1251`, `UTF-8`, ...) |
+| `LANGUAGE_AUTHOR` | Your name and contact |
+| `LANGUAGE_WINDOWSID` | Windows locale name used by WinHTTrack (`German (Standard)`) |
+
+Save the file in exactly its declared `LANGUAGE_CHARSET`; an editor that rewrites it as UTF-8 will corrupt the non-ASCII bytes.
+
+## Adding or updating a language
+
+1. Copy `English.txt` to `<Language>.txt`, or edit the existing file.
+2. Translate each second line; leave the English keys untouched.
+3. Fill in the `LANGUAGE_*` header for a new file.
+4. Open a pull request, or attach the file to a GitHub issue.
+
+When new strings land in `English.txt` they show up untranslated (as English) until a translator fills them in.

libtest/Makefile.am

@@ -20,11 +20,12 @@ 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).
-# Force libc to be recorded as a dependency.
+# Force libc back; configure gates the flag since only a GNU-style linker
+# accepts it (LIBC_FORCE_LINK is empty on e.g. macOS).
 AM_LDFLAGS = \
 	@DEFAULT_LDFLAGS@ \
 	-L../src \
-	-Wl,--push-state,--no-as-needed,-lc,--pop-state
+	@LIBC_FORCE_LINK@
 
 # Examples
 libbaselinks_la_SOURCES =  callbacks-example-baselinks.c

libtest/Makefile.in

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man/httrack.1

@@ -3,7 +3,7 @@
 .\"
 .\" 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"
+.TH httrack 1 "27 June 2026" "httrack website copier"
 .SH NAME
 httrack \- offline browser : copy websites to a local directory
 .SH SYNOPSIS
@@ -24,6 +24,7 @@ httrack \- offline browser : copy websites to a local directory
 [ \fB\-EN, \-\-max\-time[=N]\fR ]
 [ \fB\-AN, \-\-max\-rate[=N]\fR ]
 [ \fB\-%cN, \-\-connection\-per\-second[=N]\fR ]
+[ \fB\-%G, \-\-pause\fR ]
 [ \fB\-GN, \-\-max\-pause[=N]\fR ]
 [ \fB\-cN, \-\-sockets[=N]\fR ]
 [ \fB\-TN, \-\-timeout[=N]\fR ]
@@ -43,11 +44,13 @@ httrack \- offline browser : copy websites to a local directory
 [ \fB\-x, \-\-replace\-external\fR ]
 [ \fB\-%x, \-\-disable\-passwords\fR ]
 [ \fB\-%q, \-\-include\-query\-string\fR ]
+[ \fB\-%g, \-\-strip\-query\fR ]
 [ \fB\-o, \-\-generate\-errors\fR ]
 [ \fB\-X, \-\-purge\-old[=N]\fR ]
 [ \fB\-%p, \-\-preserve\fR ]
 [ \fB\-%T, \-\-utf8\-conversion\fR ]
 [ \fB\-bN, \-\-cookies[=N]\fR ]
+[ \fB\-%K, \-\-cookies\-file\fR ]
 [ \fB\-u, \-\-check\-type[=N]\fR ]
 [ \fB\-j, \-\-parse\-java[=N]\fR ]
 [ \fB\-sN, \-\-robots[=N]\fR ]
@@ -153,6 +156,8 @@ maximum mirror time in seconds (60=1 minute, 3600=1 hour) (\-\-max\-time[=N])
 maximum transfer rate in bytes/seconds (1000=1KB/s max) (\-\-max\-rate[=N])
 .IP \-%cN
 maximum number of connections/seconds (*%c10) (\-\-connection\-per\-second[=N])
+.IP \-%G
+random pause of MIN[:MAX] seconds between files (e.g. %G5:10) (\-\-pause <param>)
 .IP \-GN
 pause transfer if N bytes reached, and wait until lock file is deleted (\-\-max\-pause[=N])
 .SS Flow control:
@@ -198,6 +203,8 @@ replace external html links by error pages (\-\-replace\-external)
 do not include any password for external password protected websites (%x0 include) (\-\-disable\-passwords)
 .IP \-%q
 *include query string for local files (useless, for information purpose only) (%q0 don't include) (\-\-include\-query\-string)
+.IP \-%g
+strip query keys for dedup ([host/pattern=]key1,key2,...) (\-\-strip\-query <param>)
 .IP \-o
 *generate output html file in case of error (404..) (o0 don't generate) (\-\-generate\-errors)
 .IP \-X
@@ -209,6 +216,8 @@ links conversion to UTF\-8 (\-\-utf8\-conversion)
 .SS Spider options:
 .IP \-bN
 accept cookies in cookies.txt (0=do not accept,* 1=accept) (\-\-cookies[=N])
+.IP \-%K
+load extra cookies from a Netscape cookies.txt (\-\-cookies\-file <param>)
 .IP \-u
 check document type if unknown (cgi,asp..) (u0 don't check, * u1 check but /, u2 check always) (\-\-check\-type[=N])
 .IP \-j
@@ -225,6 +234,8 @@ tolerant requests (accept bogus responses on some servers, but not standard!) (\
 update hacks: various hacks to limit re\-transfers when updating (identical size, bogus response..) (\-\-updatehack)
 .IP \-%u
 url hacks: various hacks to limit duplicate URLs (strip //, www.foo.com==foo.com..) (\-\-urlhack)
+.br
+opt out of one url\-hack part: \-\-keep\-www\-prefix (www.foo.com<>foo.com), \-\-keep\-double\-slashes (//), \-\-keep\-query\-order (?b&a)
 .IP \-%A
 assume that a type (cgi,asp..) is always linked with a mime type (\-%A php3,cgi=text/html;dat,bin=application/x\-zip) (\-\-assume <param>)
 .br
@@ -313,12 +324,8 @@ debug HTTP headers in logfile (\-\-debug\-headers)
 .SS Guru options: (do NOT use if possible)
 .IP \-#X
 *use optimized engine (limited memory boundary checks) (\-\-fast\-engine)
-.IP \-#0
-filter test (\-#0 '*.gif' 'www.bar.com/foo.gif') (\-\-debug\-testfilters <param>)
-.IP \-#1
-simplify test (\-#1 ./foo/bar/../foobar)
-.IP \-#2
-type test (\-#2 /foo/bar.php)
+.IP \-#test
+list engine self\-tests (run one with \-#test=NAME [args])
 .IP \-#C
 cache list (\-#C '*.com/spider*.gif' (\-\-debug\-cache <param>)
 .IP \-#R

missing

@@ -1,236 +0,0 @@
-#! /bin/sh
-# Common wrapper for a few potentially missing GNU and other programs.
-
-scriptversion=2024-06-07.14; # UTC
-
-# shellcheck disable=SC2006,SC2268 # we must support pre-POSIX shells
-
-# Copyright (C) 1996-2024 Free Software Foundation, Inc.
-# Originally written by Fran,cois Pinard <pinard@iro.umontreal.ca>, 1996.
-
-# 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.
-
-if test $# -eq 0; then
-  echo 1>&2 "Try '$0 --help' for more information"
-  exit 1
-fi
-
-case $1 in
-
-  --is-lightweight)
-    # Used by our autoconf macros to check whether the available missing
-    # script is modern enough.
-    exit 0
-    ;;
-
-  --run)
-    # Back-compat with the calling convention used by older automake.
-    shift
-    ;;
-
-  -h|--h|--he|--hel|--help)
-    echo "\
-$0 [OPTION]... PROGRAM [ARGUMENT]...
-
-Run 'PROGRAM [ARGUMENT]...', returning a proper advice when this fails due
-to PROGRAM being missing or too old.
-
-Options:
-  -h, --help      display this help and exit
-  -v, --version   output version information and exit
-
-Supported PROGRAM values:
-aclocal autoconf autogen  autoheader autom4te automake autoreconf
-bison   flex     help2man lex        makeinfo perl     yacc
-
-Version suffixes to PROGRAM as well as the prefixes 'gnu-', 'gnu', and
-'g' are ignored when checking the name.
-
-Report bugs to <bug-automake@gnu.org>.
-GNU Automake home page: <https://www.gnu.org/software/automake/>.
-General help using GNU software: <https://www.gnu.org/gethelp/>."
-    exit $?
-    ;;
-
-  -v|--v|--ve|--ver|--vers|--versi|--versio|--version)
-    echo "missing (GNU Automake) $scriptversion"
-    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|autoreconf)
-      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'"
-  autoheader_deps="'acconfig.h'"
-  automake_deps="'Makefile.am'"
-  aclocal_deps="'acinclude.m4'"
-  case $normalized_program in
-    aclocal*)
-      echo "You should only need it if you modified $aclocal_deps or"
-      echo "$configure_deps."
-      ;;
-    autoconf*)
-      echo "You should only need it if you modified $configure_deps."
-      ;;
-    autogen*)
-      echo "You should only need it if you modified a '.def' or '.tpl' file."
-      echo "You may want to install the GNU AutoGen package:"
-      echo "<$gnu_software_URL/autogen/>"
-      ;;
-    autoheader*)
-      echo "You should only need it if you modified $autoheader_deps or"
-      echo "$configure_deps."
-      ;;
-    automake*)
-      echo "You should only need it if you modified $automake_deps or"
-      echo "$configure_deps."
-      ;;
-    autom4te*)
-      echo "You might have modified some maintainer files that require"
-      echo "the 'autom4te' program to be rebuilt."
-      ;;
-    autoreconf*)
-      echo "You should only need it if you modified $aclocal_deps or"
-      echo "$automake_deps or $autoheader_deps or $automake_deps or"
-      echo "$configure_deps."
-      ;;
-    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 "<$gnu_software_URL/bison/>"
-      ;;
-    help2man*)
-      echo "You should only need it if you modified a dependency" \
-           "of a man page."
-      echo "You may want to install the GNU Help2man package:"
-      echo "<$gnu_software_URL/help2man/>"
-    ;;
-    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 "<$flex_URL>"
-      ;;
-    makeinfo*)
-      echo "You should only need it if you modified a '.texi' file, or"
-      echo "any other file indirectly affecting the aspect of the manual."
-      echo "You might want to install the Texinfo package:"
-      echo "<$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 "<$gnu_software_URL/make/>"
-      ;;
-    perl*)
-      echo "You should only need it to run GNU Autoconf, GNU Automake, "
-      echo "  assorted other tools, or if you modified a Perl source file."
-      echo "You may want to install the Perl 5 language interpreter:"
-      echo "<$perl_URL>"
-      ;;
-    *)
-      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 '$1' program."
-      ;;
-  esac
-  program_details "$normalized_program"
-}
-
-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

@@ -56,21 +56,21 @@ whttrackrundir = $(bindir)
 whttrackrun_SCRIPTS = webhttrack
 
 libhttrack_la_SOURCES =  htscore.c htsparse.c htsback.c htscache.c \
-	htscache_selftest.c \
+	htscache_selftest.c htsdns_selftest.c htsselftest.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 \
 	htsalias.c htsthread.c htsindex.c htsbauth.c \
 	htsmd5.c htszlib.c htswrap.c htsconcat.c \
-	htsmodules.c htscharset.c punycode.c htsencoding.c \
+	htsmodules.c htscharset.c punycode.c htsencoding.c htssniff.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 htscache_selftest.h htscatchurl.h  \
+	htsbasenet.h htsbauth.h htscache.h htscache_selftest.h htsdns_selftest.h htsselftest.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 \
-	htsmodules.h htsname.h htsnet.h \
+	htsmodules.h htsname.h htsnet.h htssniff.h \
 	htsopt.h htsrobots.h htsthread.h  \
 	htstools.h htswizard.h htswrap.h htszlib.h  \
 	htsstrings.h htsarrays.h httrack-library.h \
@@ -86,8 +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 \
@@ -113,5 +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/htsalias.c

@@ -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:
@@ -74,6 +60,9 @@ Please visit our Website: http://www.httrack.com
   param1 : this option must be alone, and needs one distinct parameter (-P <path>)
   param0 : this option must be alone, but the parameter should be put together (+*.gif)
 */
+/* clang-format off: hand-aligned table; clang-format reflows the whole
+   initializer (2->4 space) on any edit, churning every untouched row. */
+/* clang-format off */
 const char *hts_optalias[][4] = {
   /*   {"","","",""}, */
   {"path", "-O", "param1", "output path"},
@@ -121,6 +110,12 @@ const char *hts_optalias[][4] = {
   {"disable-passwords", "-%x", "single", ""}, {"disable-password", "-%x",
                                                "single", ""},
   {"include-query-string", "-%q", "single", ""},
+  {"strip-query", "-%g", "param1",
+   "strip [host/pattern=]key1,key2,... from URLs"},
+  {"cookies-file", "-%K", "param1",
+   "load extra cookies from a Netscape cookies.txt"},
+  {"pause", "-%G", "param1",
+   "random pause of MIN[:MAX] seconds between files"},
   {"generate-errors", "-o", "single", ""},
   {"do-not-generate-errors", "-o0", "single", ""},
   {"purge-old", "-X", "param", ""},
@@ -137,6 +132,9 @@ const char *hts_optalias[][4] = {
   {"tolerant", "-%B", "single", ""},
   {"updatehack", "-%s", "single", ""}, {"sizehack", "-%s", "single", ""},
   {"urlhack", "-%u", "single", ""},
+  {"keep-www-prefix", "-%j", "single", ""},
+  {"keep-double-slashes", "-%o", "single", ""},
+  {"keep-query-order", "-%y", "single", ""},
   {"user-agent", "-F", "param1", "user-agent identity"},
   {"referer", "-%R", "param1", "default referer URL"},
   {"from", "-%E", "param1", "from email address"},
@@ -255,6 +253,7 @@ const char *hts_optalias[][4] = {
 
   {"", "", "", ""}
 };
+/* clang-format on */
 
 /* 
   Check for alias in command-line 
@@ -284,7 +283,6 @@ int optalias_check(int argc, const char *const *argv, int n_arg,
       char *position;
       int need_param = 1;
 
-      //int return_param=0;
       int pos;
 
       command[0] = param[0] = addcommand[0] = '\0';
@@ -362,7 +360,6 @@ int optalias_check(int argc, const char *const *argv, int n_arg,
               strlcatbuff(return_argv[0], "0", return_argv_size);
             else if (strcmp(param, "on") == 0) {
               // on is the default
-              // strcatbuff(return_argv[0],"1");
             } else
               strlcatbuff(return_argv[0], param, return_argv_size);
           }
@@ -468,7 +465,7 @@ 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");
@@ -542,14 +539,15 @@ 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

@@ -45,13 +45,41 @@ 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

@@ -30,6 +30,12 @@ Please visit our Website: http://www.httrack.com
 /* Author: Xavier Roche                                         */
 /* ------------------------------------------------------------ */
 
+/** @file htsarrays.h
+ *  Header-only generic dynamic array (a typed growable vector). All operations
+ *  are macros parameterized by the array lvalue A; the element type T is fixed
+ *  by the struct TypedArray(T) declares. Counts and capacities are in
+ *  elements, not bytes. The array owns its backing store: grow it via the Add/
+ *  Append/EnsureRoom macros and release it with TypedArrayFree. */
 #ifndef HTS_ARRAYS_DEFSTATIC
 #define HTS_ARRAYS_DEFSTATIC
 
@@ -39,111 +45,118 @@ Please visit our Website: http://www.httrack.com
 
 #include "htssafe.h"
 
-/* Memory allocation assertion failure */
+/* Abort (with the failed byte count) when a growth allocation fails. The
+   array macros never return an out-of-memory error; they assert and abort. */
 static void hts_record_assert_memory_failed(const size_t size) {
-  fprintf(stderr, "memory allocation failed (%lu bytes)", \
-          (long int) size); \
-  assertf(! "memory allocation failed"); \
+  fprintf(stderr, "memory allocation failed (%lu bytes)", (long int) size);
+  assertf(!"memory allocation failed");
 }
 
 /** Dynamic array of T elements. **/
-#define TypedArray(T) \
-  struct {            \
-    /** Elements. **/ \
-    union {           \
-      /** Typed. **/  \
-      T* elts;        \
-      /** Opaque. **/ \
-      void* ptr;      \
-    } data;           \
-    /** Count. **/    \
-    size_t size;      \
-    /** Capacity. **/ \
-    size_t capa;      \
+#define TypedArray(T)                                                          \
+  struct {                                                                     \
+    /** Elements. **/                                                          \
+    union {                                                                    \
+      /** Typed. **/                                                           \
+      T *elts;                                                                 \
+      /** Opaque. **/                                                          \
+      void *ptr;                                                               \
+    } data;                                                                    \
+    /** Count. **/                                                             \
+    size_t size;                                                               \
+    /** Capacity. **/                                                          \
+    size_t capa;                                                               \
   }
-#define EMPTY_TYPED_ARRAY { { NULL }, 0, 0 }
+
+/** Initializer for an empty array (no backing store, size and capacity 0). **/
+#define EMPTY_TYPED_ARRAY {{NULL}, 0, 0}
 
 /** Array size, in elements. **/
-#define TypedArraySize(A)   ((A).size)
+#define TypedArraySize(A) ((A).size)
 
 /** Array capacity, in elements. **/
-#define TypedArrayCapa(A)   ((A).capa)
+#define TypedArrayCapa(A) ((A).capa)
 
 /**
- * Remaining free space, in elements. 
+ * Remaining free space, in elements.
  * Macro, first element evaluated multiple times.
  **/
-#define TypedArrayRoom(A)   ( TypedArrayCapa(A) - TypedArraySize(A) )
+#define TypedArrayRoom(A) (TypedArrayCapa(A) - TypedArraySize(A))
 
 /** Array elements, of type T*. **/
-#define TypedArrayElts(A)   ((A).data.elts)
+#define TypedArrayElts(A) ((A).data.elts)
 
 /** Array pointer, of type void*. **/
-#define TypedArrayPtr(A)    ((A).data.ptr)
+#define TypedArrayPtr(A) ((A).data.ptr)
 
 /** Size of T. **/
-#define TypedArrayWidth(A)  (sizeof(*TypedArrayElts(A)))
+#define TypedArrayWidth(A) (sizeof(*TypedArrayElts(A)))
 
-/** Nth element of the array. **/
+/** Nth element of the array, as an lvalue. No bounds check; N must be
+    < TypedArraySize(A). **/
 #define TypedArrayNth(A, N) (TypedArrayElts(A)[N])
 
 /**
- * Tail of the array (outside the array). 
+ * Tail of the array (outside the array).
  * The returned pointer points to the beginning of TypedArrayRoom(A)
  * free elements.
  **/
 #define TypedArrayTail(A) (TypedArrayNth(A, TypedArraySize(A)))
 
 /**
-  * Ensure at least 'ROOM' elements can be put in the remaining space.
-  * After a call to this macro, TypedArrayRoom(A) is guaranteed to be at 
-  * least equal to 'ROOM'.
-  **/
-#define TypedArrayEnsureRoom(A, ROOM) do { \
-  const size_t room_ = (ROOM); \
-  while (TypedArrayRoom(A) < room_) { \
-    TypedArrayCapa(A) = TypedArrayCapa(A) < 16 ? 16 : TypedArrayCapa(A) * 2; \
-  } \
-  TypedArrayPtr(A) = realloc(TypedArrayPtr(A), \
-                             TypedArrayCapa(A)*TypedArrayWidth(A)); \
-  if (TypedArrayPtr(A) == NULL) { \
-    hts_record_assert_memory_failed(TypedArrayCapa(A)*TypedArrayWidth(A)); \
-  } \
-} while(0)
+ * Ensure at least 'ROOM' elements can be put in the remaining space.
+ * After a call to this macro, TypedArrayRoom(A) is guaranteed to be at
+ * least equal to 'ROOM'.
+ **/
+#define TypedArrayEnsureRoom(A, ROOM)                                          \
+  do {                                                                         \
+    const size_t room_ = (ROOM);                                               \
+    while (TypedArrayRoom(A) < room_) {                                        \
+      TypedArrayCapa(A) = TypedArrayCapa(A) < 16 ? 16 : TypedArrayCapa(A) * 2; \
+    }                                                                          \
+    TypedArrayPtr(A) =                                                         \
+        realloc(TypedArrayPtr(A), TypedArrayCapa(A) * TypedArrayWidth(A));     \
+    if (TypedArrayPtr(A) == NULL) {                                            \
+      hts_record_assert_memory_failed(TypedArrayCapa(A) * TypedArrayWidth(A)); \
+    }                                                                          \
+  } while (0)
 
 /** Add an element. Macro, first element evaluated multiple times. **/
-#define TypedArrayAdd(A, E) do { \
-  TypedArrayEnsureRoom(A, 1); \
-  assertf(TypedArraySize(A) < TypedArrayCapa(A)); \
-  TypedArrayTail(A) = (E); \
-  TypedArraySize(A)++; \
-} while(0)
+#define TypedArrayAdd(A, E)                                                    \
+  do {                                                                         \
+    TypedArrayEnsureRoom(A, 1);                                                \
+    assertf(TypedArraySize(A) < TypedArrayCapa(A));                            \
+    TypedArrayTail(A) = (E);                                                   \
+    TypedArraySize(A)++;                                                       \
+  } while (0)
 
 /**
- * Add 'COUNT' elements from 'PTR'. 
+ * Add 'COUNT' elements from 'PTR'.
  * Macro, first element evaluated multiple times.
  **/
-#define TypedArrayAppend(A, PTR, COUNT) do { \
-  const size_t count_ = (COUNT); \
-  /* This 1-case is to benefit from type safety. */ \
-  if (count_ == 1) { \
-    TypedArrayAdd(A, *(PTR)); \
-  } else { \
-    const void *const source_ = (PTR); \
-    TypedArrayEnsureRoom(A, count_); \
-    assertf(count_ <= TypedArrayRoom(A)); \
-    memcpy(&TypedArrayTail(A), source_, count_ * TypedArrayWidth(A)); \
-    TypedArraySize(A) += count_; \
-  } \
-} while(0)
+#define TypedArrayAppend(A, PTR, COUNT)                                        \
+  do {                                                                         \
+    const size_t count_ = (COUNT);                                             \
+    /* This 1-case is to benefit from type safety. */                          \
+    if (count_ == 1) {                                                         \
+      TypedArrayAdd(A, *(PTR));                                                \
+    } else {                                                                   \
+      const void *const source_ = (PTR);                                       \
+      TypedArrayEnsureRoom(A, count_);                                         \
+      assertf(count_ <= TypedArrayRoom(A));                                    \
+      memcpy(&TypedArrayTail(A), source_, count_ *TypedArrayWidth(A));         \
+      TypedArraySize(A) += count_;                                             \
+    }                                                                          \
+  } while (0)
 
 /** Clear an array, freeing memory and clearing size and capacity. **/
-#define TypedArrayFree(A) do { \
-  if (TypedArrayPtr(A) != NULL) { \
-    TypedArrayCapa(A) = TypedArraySize(A) = 0; \
-    free(TypedArrayPtr(A)); \
-    TypedArrayPtr(A) = NULL; \
-  } \
-} while(0)
+#define TypedArrayFree(A)                                                      \
+  do {                                                                         \
+    if (TypedArrayPtr(A) != NULL) {                                            \
+      TypedArrayCapa(A) = TypedArraySize(A) = 0;                               \
+      free(TypedArrayPtr(A));                                                  \
+      TypedArrayPtr(A) = NULL;                                                 \
+    }                                                                          \
+  } while (0)
 
 #endif

src/htsback.c

@@ -43,21 +43,22 @@ Please visit our Website: http://www.httrack.com
 
 #include "htsback.h"
 
-//#ifdef _WIN32
 #include "htsftp.h"
 #if HTS_USEZLIB
 #include "htszlib.h"
 #else
 #error HTS_USEZLIB not defined
 #endif
-//#endif
 
 #ifdef _WIN32
 #ifndef __cplusplus
 // DOS
 #include <process.h>            /* _beginthread, _endthread */
 #endif
+#include <io.h> /* _chsize_s */
+#define HTS_FTRUNCATE(fp, sz) _chsize_s(_fileno(fp), (sz))
 #else
+#define HTS_FTRUNCATE(fp, sz) ftruncate(fileno(fp), (sz))
 #endif
 
 #define VT_CLREOL       "\33[K"
@@ -73,6 +74,8 @@ struct_back *back_new(httrackp *opt, int back_max) {
 
   sback->count = back_max;
   sback->lnk = (lien_back *) calloct((back_max + 1), sizeof(lien_back));
+  sback->connect_fallback = (hts_connect_fallback *) calloct(
+      (back_max + 1), sizeof(hts_connect_fallback));
   sback->ready = coucal_new(0);
   hts_set_hash_handler(sback->ready, opt);
   coucal_set_name(sback->ready, "back_new");
@@ -83,6 +86,7 @@ struct_back *back_new(httrackp *opt, int back_max) {
     sback->lnk[i].r.location = sback->lnk[i].location_buffer;
     sback->lnk[i].status = STATUS_FREE;
     sback->lnk[i].r.soc = INVALID_SOCKET;
+    sback->connect_fallback[i].addr_count = -1; // not yet probed
   }
   return sback;
 }
@@ -93,6 +97,7 @@ void back_free(struct_back ** sback) {
       freet((*sback)->lnk);
       (*sback)->lnk = NULL;
     }
+    freet((*sback)->connect_fallback);
     if ((*sback)->ready != NULL) {
       coucal_delete(&(*sback)->ready);
       (*sback)->ready_size_bytes = 0;
@@ -102,6 +107,72 @@ void back_free(struct_back ** sback) {
   }
 }
 
+/* Per-candidate connect deadline cap (seconds): a connecting slot with another
+   address to try waits at most this long before falling back, instead of the
+   full (default 120s) slot timeout. Caps the dead-IPv6 stall while staying well
+   above a normal handshake. The last candidate still gets the full timeout. */
+#define HTS_CONNECT_FALLBACK_TIMEOUT 10
+
+int back_connect_fallback_due(int addr_index, int addr_count, int elapsed,
+                              int timeout) {
+  int deadline;
+
+  if (addr_index + 1 >= addr_count) // last (or only) candidate: no fallback
+    return 0;
+  if (timeout <= 0) // no timeout management: never force it
+    return 0;
+  deadline = (timeout < HTS_CONNECT_FALLBACK_TIMEOUT)
+                 ? timeout
+                 : HTS_CONNECT_FALLBACK_TIMEOUT;
+  return elapsed >= deadline;
+}
+
+/* Pending-connect result for a non-blocking socket reported ready by select():
+   0 = connected, >0 = the connect errno (refused, unreachable, ...), -1 if the
+   probe itself failed. A failed connect is reported writable too, so this is
+   how success is told from failure without blocking. */
+static int connect_socket_error(T_SOC soc) {
+  int soerr = 0;
+  socklen_t len = (socklen_t) sizeof(soerr);
+
+  if (getsockopt(soc, SOL_SOCKET, SO_ERROR, (char *) &soerr, &len) != 0)
+    return -1;
+  return soerr;
+}
+
+/* Retry a stuck/failed connecting slot against its next resolved address.
+   Closes the current socket and starts a non-blocking connect to the next
+   candidate, leaving the slot in STATUS_CONNECTING. Returns 1 if a new connect
+   was started, 0 if no fallback address remains (caller fails the slot). */
+static int back_connect_next(httrackp *opt, struct_back *sback, int i) {
+  hts_connect_fallback *const cf = &sback->connect_fallback[i];
+  lien_back *const back = sback->lnk;
+  const int next = cf->addr_index + 1;
+  T_SOC soc;
+
+  if (next >= cf->addr_count)
+    return 0;
+
+  if (back[i].r.soc != INVALID_SOCKET) {
+    deletehttp(&back[i].r);
+    back[i].r.soc = INVALID_SOCKET;
+  }
+  soc = newhttp_addr(opt, back[i].url_adr, &back[i].r, -1, 0, next, NULL);
+  if (soc == INVALID_SOCKET)
+    return 0;
+
+  back[i].r.soc = soc;
+  cf->addr_index = next;
+  cf->connect_start = time_local();
+  if (back[i].timeout > 0)
+    back[i].timeout_refresh = cf->connect_start;
+  back[i].status = STATUS_CONNECTING;
+  hts_log_print(opt, LOG_DEBUG,
+                "connect failed, trying next address (%d/%d) for %s", next + 1,
+                cf->addr_count, back[i].url_adr);
+  return 1;
+}
+
 void back_delete_all(httrackp * opt, cache_back * cache, struct_back * sback) {
   if (sback != NULL) {
     int i;
@@ -499,9 +570,12 @@ int back_finalize(httrackp * opt, cache_back * cache, struct_back * sback,
         && back[p].r.size != back[p].r.totalsize && !opt->tolerant) {
       if (back[p].status == STATUS_READY) {
         hts_log_print(opt, LOG_WARNING,
-                      "file not stored in cache due to bogus state (broken size, expected "
-                      LLintP " got " LLintP "): %s%s", back[p].r.totalsize,
-                      back[p].r.size, back[p].url_adr, back[p].url_fil);
+                      "incomplete transfer (expected " LLintP
+                      " bytes, got " LLintP
+                      "): file not cached, will be retried on the next update"
+                      " (use -%%B to cache anyway): %s%s",
+                      back[p].r.totalsize, back[p].r.size, back[p].url_adr,
+                      back[p].url_fil);
       } else {
         hts_log_print(opt, LOG_INFO,
                       "incomplete file not yet stored in cache (expected "
@@ -521,7 +595,6 @@ int back_finalize(httrackp * opt, cache_back * cache, struct_back * sback,
 #if HTS_USEZLIB
         if (back[p].r.compressed) {
           if (back[p].r.size > 0) {
-            //if ( (back[p].r.adr) && (back[p].r.size>0) ) {
             // stats
             back[p].compressed_size = back[p].r.size;
             // en mémoire -> passage sur disque
@@ -806,11 +879,12 @@ int back_finalize(httrackp * opt, cache_back * cache, struct_back * sback,
                          back[p].url_fil, NULL);
           } else {
             /* Partial file, but marked as "ok" ? */
-            hts_log_print(opt, LOG_WARNING,
-                          "file not stored in cache due to bogus state (incomplete type with %s (%d), size "
-                          LLintP "): %s%s", back[p].r.msg, back[p].r.statuscode,
-                          (LLint) back[p].r.size, back[p].url_adr,
-                          back[p].url_fil);
+            hts_log_print(
+                opt, LOG_WARNING,
+                "file with unresolved type not cached (%s (%d), size " LLintP
+                "): %s%s",
+                back[p].r.msg, back[p].r.statuscode, (LLint) back[p].r.size,
+                back[p].url_adr, back[p].url_fil);
           }
         }
 
@@ -850,7 +924,6 @@ int back_letlive(httrackp * opt, cache_back * cache, struct_back * sback,
     /* clear everything but connection: switch, close, and reswitch */
     back_connxfr(src, &tmp);
     back_delete(opt, cache, sback, p);
-    //deletehttp(src);
     back_connxfr(&tmp, src);
     src->req.flush_garbage = 1; /* ignore CRLF garbage */
     return 1;
@@ -1285,7 +1358,49 @@ int back_flush_output(httrackp * opt, cache_back * cache, struct_back * sback,
   return 0;
 }
 
+/* Move a still-writing .delayed placeholder to its final name (#483). */
+hts_boolean back_delayed_rename(httrackp *opt, lien_back *back,
+                                const char *newname) {
+  hts_boolean renamed;
+
+  if (!back->r.is_write || back->tmpfile != NULL ||
+      !IS_DELAYED_EXT(back->url_sav) || strcmp(back->url_sav, newname) == 0)
+    return HTS_TRUE; /* nothing bound to the placeholder name */
+  if (back->r.out != NULL) {
+    fclose(back->r.out);
+    back->r.out = NULL;
+  }
+  renamed = RENAME(back->url_sav, newname) == 0 ? HTS_TRUE : HTS_FALSE;
+  if (renamed && (back->status == STATUS_READY ||
+                  (back->r.out = FOPEN(newname, "ab")) != NULL)) {
+    filenote(&opt->state.strc, newname, NULL);
+    hts_log_print(opt, LOG_DEBUG, "moved placeholder %s to %s", back->url_sav,
+                  newname);
+    return HTS_TRUE;
+  }
+  /* partial lost: drop only what we own (Windows rename won't overwrite) */
+  hts_log_print(opt, LOG_WARNING | LOG_ERRNO, "unable to move %s to %s",
+                back->url_sav, newname);
+  back->r.statuscode = STATUSCODE_INVALID;
+  strcpybuff(back->r.msg, "Write error on disk");
+  back->r.is_write = 0;
+  (void) UNLINK(renamed ? newname : back->url_sav);
+  return HTS_FALSE;
+}
+
 // effacer entrée
+/* Discard a cancelled mid-write .delayed placeholder (unusable across runs). */
+void back_delayed_discard(httrackp *opt, lien_back *back) {
+  if (back->r.out != NULL) {
+    fclose(back->r.out);
+    back->r.out = NULL;
+  }
+  back->r.is_write = 0;
+  if (opt != NULL)
+    url_savename_refname_remove(opt, back->url_adr, back->url_fil);
+  (void) UNLINK(back->url_sav);
+}
+
 int back_delete(httrackp * opt, cache_back * cache, struct_back * sback,
                 const int p) {
   lien_back *const back = sback->lnk;
@@ -1293,6 +1408,12 @@ int back_delete(httrackp * opt, cache_back * cache, struct_back * sback,
 
   assertf(p >= 0 && p < back_max);
   if (p >= 0 && p < sback->count) {     // on sait jamais..
+    /* mid-write cancel: drop a .delayed placeholder; real-named partials
+       survive for resume (--continue) */
+    if (back[p].r.is_write && IS_DELAYED_EXT(back[p].url_sav) &&
+        (back[p].status != STATUS_READY || back[p].r.statuscode <= 0)) {
+      back_delayed_discard(opt, &back[p]);
+    }
     // Vérificateur d'intégrité
 #if DEBUG_CHECKINT
     _CHECKINT(&back[p], "Appel back_delete")
@@ -1312,7 +1433,6 @@ int back_delete(httrackp * opt, cache_back * cache, struct_back * sback,
                       back[p].url_adr, back[p].url_fil, back[p].url_sav);
       }
       if (cache != NULL) {
-        //hts_log_print(opt, LOG_TRACE, "finalizing from back_delete");
         back_finalize(opt, cache, sback, p);
       }
     }
@@ -1453,7 +1573,6 @@ int back_add(struct_back * sback, httrackp * opt, cache_back * cache, const char
     if (back[p].r.soc != INVALID_SOCKET) {      /* we never know */
       deletehttp(&back[p].r);
     }
-    //memset(&(back[p].r), 0, sizeof(htsblk)); 
     hts_init_htsblk(&back[p].r);
     back[p].r.location = back[p].location_buffer;
 
@@ -1461,7 +1580,6 @@ int back_add(struct_back * sback, httrackp * opt, cache_back * cache, const char
     strcpybuff(back[p].url_adr, adr);
     strcpybuff(back[p].url_fil, fil);
     strcpybuff(back[p].url_sav, save);
-    //back[p].links_index = links_index;
     // copier referer si besoin
     strcpybuff(back[p].referer_adr, "");
     strcpybuff(back[p].referer_fil, "");
@@ -1700,8 +1818,7 @@ int back_add(struct_back * sback, httrackp * opt, cache_back * cache, const char
                             back[p].url_adr, back[p].url_fil);
             }
             back[p].r.notmodified = 1;  // fichier non modifié
-            back[p].status = STATUS_READY;      // OK prêt
-            //file_notify(back[p].url_adr, back[p].url_fil, back[p].url_sav, 0, 0, back[p].r.notmodified);        // not modified
+            back[p].status = STATUS_READY; // OK prêt
             back_set_finished(sback, p);
 
             // finalize transfer
@@ -1716,7 +1833,6 @@ int back_add(struct_back * sback, httrackp * opt, cache_back * cache, const char
           } else {              // erreur
             // effacer r
             hts_init_htsblk(&back[p].r);
-            //memset(&(back[p].r), 0, sizeof(htsblk)); 
             back[p].r.location = back[p].location_buffer;
             // et continuer (chercher le fichier)
           }
@@ -1911,8 +2027,10 @@ int back_add(struct_back * sback, httrackp * opt, cache_back * cache, const char
       // ouvrir liaison, envoyer requète
       // ne pas traiter ou recevoir l'en tête immédiatement
       hts_init_htsblk(&back[p].r);
-      //memset(&(back[p].r), 0, sizeof(htsblk)); 
       back[p].r.location = back[p].location_buffer;
+      // fresh connect: address list not yet probed, start at the first
+      sback->connect_fallback[p].addr_index = 0;
+      sback->connect_fallback[p].addr_count = -1;
       // recopier proxy
       if ((back[p].r.req.proxy.active = opt->proxy.active)) {
         if (StringBuff(opt->proxy.bindhost) != NULL)
@@ -1959,7 +2077,6 @@ int back_add(struct_back * sback, httrackp * opt, cache_back * cache, const char
 #if HTS_USEOPENSSL
       else if (strfield(back[p].url_adr, "https://")) {     // let's rock
         back[p].r.ssl = 1;
-        // back[p].r.ssl_soc = NULL;
         back[p].r.ssl_con = NULL;
       }
 #endif
@@ -2025,9 +2142,9 @@ int back_add(struct_back * sback, httrackp * opt, cache_back * cache, const char
         back[p].rateout = -1;   // pas de gestion (default)
       }
 
-      // Note: on charge les code-page erreurs (erreur 404, etc) dans le cas où cela est
-      // rattrapable (exemple: 301,302 moved xxx -> refresh sur la page!)
-      //if ((back[p].statuscode!=HTTP_OK) || (soc<0)) { // ERREUR HTTP/autre
+      // Note: on charge les code-page erreurs (erreur 404, etc) dans le cas où
+      // cela est rattrapable (exemple: 301,302 moved xxx -> refresh sur la
+      // page!)
 
 #if CNXDEBUG
       printf("Xfopen ok, poll..\n");
@@ -2045,7 +2162,6 @@ int back_add(struct_back * sback, httrackp * opt, cache_back * cache, const char
       if (soc == INVALID_SOCKET) {      // erreur socket
         back[p].status = STATUS_READY;  // FINI
         back_set_finished(sback, p);
-        //if (back[p].soc!=INVALID_SOCKET) deletehttp(back[p].soc);
         back[p].r.soc = INVALID_SOCKET;
       } else {
         if (!back[p].r.is_file)
@@ -2066,8 +2182,6 @@ int back_add(struct_back * sback, httrackp * opt, cache_back * cache, const char
 
     // note: si il y a erreur (404,etc) status=2 (terminé/échec) mais
     // le lien est considéré comme traité
-    //if (back[p].soc<0)  // erreur
-    //  return -1;
 
     return 0;
   } else {
@@ -2140,9 +2254,6 @@ void back_solve(httrackp * opt, lien_back * back) {
     } else {
       hts_log_print(opt, LOG_DEBUG, "failed to resolve: %s", a);
     }
-    //if (hts_dnstest(opt, a, 1) == 2) { // non encore testé!..
-    //  hts_log_print(opt, LOG_DEBUG, "resolving in background: %s", a);
-    //}
   }
 }
 
@@ -2161,12 +2272,13 @@ int host_wait(httrackp * opt, lien_back * back) {
 
 static int slot_can_be_cleaned(const lien_back * back) {
   return (back->status == STATUS_READY) // ready
-    /* Check autoclean */
-    && (!back->testmode)        // not test mode
-    && (strnotempty(back->url_sav))     // filename exists
-    && (HTTP_IS_OK(back->r.statuscode)) // HTTP "OK"
-    && (back->r.size >= 0)      // size>=0
-    ;
+         /* Check autoclean */
+         && (!back->locked)   // not held by hts_wait_delayed (name pending)
+         && (!back->testmode) // not test mode
+         && (strnotempty(back->url_sav))     // filename exists
+         && (HTTP_IS_OK(back->r.statuscode)) // HTTP "OK"
+         && (back->r.size >= 0)              // size>=0
+      ;
 }
 
 static int slot_can_be_finalized(httrackp * opt, const lien_back * back) {
@@ -2190,11 +2302,6 @@ void back_clean(httrackp * opt, cache_back * cache, struct_back * sback) {
         (void) back_flush_output(opt, cache, sback, i); // flush output buffers
         usercommand(opt, 0, NULL, back[i].url_sav, back[i].url_adr,
                     back[i].url_fil);
-        //if (back[i].links_index >= 0) {
-        //  assertf(back[i].links_index < opt->hash->max_lien);
-        //  opt->hash->liens[back[i].links_index]->pass2 = -1;
-        //  // *back[i].pass2_ptr=-1;  // Done!
-        //}
         /* MANDATORY if we don't want back_fill() to endlessly put the same file on download! */
         {
           int index = hash_read(opt->hash, back[i].url_sav, NULL, HASH_STRUCT_FILENAME );       // lecture type 0 (sav)
@@ -2342,6 +2449,34 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
   back_clean(opt, cache, sback);
 #endif
 
+  /* Time limit exceeded past grace: abort in-flight transfers so no wait loop
+     starves (#481). FTP slots stay, their thread owns the socket. */
+  if (!back_checkmirror(opt)) {
+    int aborted = 0;
+    unsigned int i;
+
+    for (i = 0; i < (unsigned int) back_max; i++) {
+      if (back[i].status > 0 && back[i].status < STATUS_FTP_TRANSFER) {
+        if (back[i].r.soc != INVALID_SOCKET) {
+          deletehttp(&back[i].r);
+        }
+        back[i].r.soc = INVALID_SOCKET;
+        /* drop a .delayed placeholder; real partials survive for resume */
+        if (back[i].r.is_write && IS_DELAYED_EXT(back[i].url_sav))
+          back_delayed_discard(opt, &back[i]);
+        back[i].r.statuscode = STATUSCODE_TIMEOUT;
+        strcpybuff(back[i].r.msg, "Mirror Time Out");
+        back[i].status = STATUS_READY;
+        back_set_finished(sback, i);
+        aborted++;
+      }
+    }
+    if (aborted > 0)
+      hts_log_print(opt, LOG_WARNING,
+                    "time limit reached, %d transfer(s) aborted", aborted);
+    return;
+  }
+
   // recevoir tant qu'il y a des données (avec un maximum de max_loop boucles)
   do_wait = 0;
   gestion_timeout = 0;
@@ -2350,9 +2485,6 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
 
     busy_state = busy_recv = 0;
 
-#if 0
-    check_rate(stat_timestart, opt->maxrate);   // vérifier taux de transfert
-#endif
     // inscrire les sockets actuelles, et rechercher l'ID la plus élevée
     FD_ZERO(&fds);
     FD_ZERO(&fds_c);
@@ -2362,28 +2494,31 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
     nfds = INVALID_SOCKET;
 
     max_c = 1;
-    for(i_mod = 0; i_mod < (unsigned int) back_max; i_mod++) {
-      // for(i=0;i<back_max;i++) {
+    for (i_mod = 0; i_mod < (unsigned int) back_max; i_mod++) {
       unsigned int i = (i_mod + mod_random) % (back_max);
 
       // en cas de gestion du connect préemptif
 #if HTS_XCONN
       if (back[i].status == STATUS_CONNECTING) {        // connexion
-        do_wait = 1;
+        // a connecting slot always carries a live socket; guard anyway so a
+        // stray INVALID_SOCKET can never reach FD_SET (mirrors the recv branch)
+        if (back[i].r.soc != INVALID_SOCKET) {
+          do_wait = 1;
 
-        // noter socket write
-        FD_SET(back[i].r.soc, &fds_c);
+          // noter socket write
+          FD_SET(back[i].r.soc, &fds_c);
 
-        // noter socket erreur
-        FD_SET(back[i].r.soc, &fds_e);
+          // noter socket erreur
+          FD_SET(back[i].r.soc, &fds_e);
 
-        // calculer max
-        if (max_c) {
-          max_c = 0;
-          nfds = back[i].r.soc;
-        } else if (back[i].r.soc > nfds) {
-          // ID socket la plus élevée
-          nfds = back[i].r.soc;
+          // calculer max
+          if (max_c) {
+            max_c = 0;
+            nfds = back[i].r.soc;
+          } else if (back[i].r.soc > nfds) {
+            // ID socket la plus élevée
+            nfds = back[i].r.soc;
+          }
         }
 
       } else
@@ -2396,8 +2531,7 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
         // poll pour la lecture sur les sockets
       if ((back[i].status > 0) && (back[i].status < 100)) {     // en réception http
 
-#if BDEBUG==1
-        //printf("....socket in progress: %d\n",back[i].r.soc);
+#if BDEBUG == 1
 #endif
         // non local et non ftp
         if (!back[i].r.is_file) {
@@ -2483,8 +2617,7 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
       busy_recv = 0;
 
     // recevoir les données arrivées
-    for(i_mod = 0; i_mod < (unsigned int) back_max; i_mod++) {
-      // for(i=0;i<back_max;i++) {
+    for (i_mod = 0; i_mod < (unsigned int) back_max; i_mod++) {
       unsigned int i = (i_mod + mod_random) % (back_max);
 
       if (back[i].status > 0) {
@@ -2517,8 +2650,20 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
       }
       // ---- FLAG WRITE MIS A UN?: POUR LE CONNECT
       if (back[i].status == STATUS_CONNECTING) {        // attendre connect
+        hts_connect_fallback *const cf = &sback->connect_fallback[i];
         int dispo = 0;
 
+        // probe the resolved address list once per fresh connect (cache hit:
+        // the host was resolved when this connect was opened)
+        if (cf->addr_count < 0 && back[i].r.soc != INVALID_SOCKET &&
+            !back[i].r.is_file) {
+          SOCaddr scratch[HTS_MAXADDRNUM];
+
+          cf->addr_count = hts_dns_resolve_all(opt, back[i].url_adr, scratch,
+                                               HTS_MAXADDRNUM, NULL);
+          cf->connect_start = time_local();
+        }
+
         // vérifier l'existance de timeout-check
         if (!gestion_timeout)
           if (back[i].timeout > 0)
@@ -2526,14 +2671,45 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
 
         // connecté?
         dispo = FD_ISSET(back[i].r.soc, &fds_c);
-        if (dispo) {            // ok connected!!
+        if (dispo) { // socket ready: connect() finished (ok or failed)
+          // a refused/failed connect is reported writable too; probe SO_ERROR
+          // and, on failure, fall back to the next address (or fail the slot)
+          if (connect_socket_error(back[i].r.soc) != 0) {
+            if (!back_connect_next(opt, sback, i)) {
+              deletehttp(&back[i].r);
+              back[i].r.soc = INVALID_SOCKET;
+              back[i].r.statuscode = STATUSCODE_CONNERROR;
+              strcpybuff(back[i].r.msg, "Connect Error");
+              back[i].status = STATUS_READY;
+              back_set_finished(sback, i);
+            }
+            continue; // reconnected (stay connecting) or failed
+          }
           busy_state = 1;
 
 #if HTS_USEOPENSSL
           /* SSL mode */
           if (back[i].r.ssl) {
+            int tunnel_ok = 1;
+
+            // https via proxy: CONNECT-tunnel before TLS (#85)
+            if (back[i].r.req.proxy.active && back[i].r.ssl_con == NULL) {
+              const int timeout = back[i].timeout > 0 ? back[i].timeout : 30;
+
+              tunnel_ok =
+                  http_proxy_tunnel(opt, &back[i].r, back[i].url_adr, timeout);
+              if (!tunnel_ok) {
+                if (!strnotempty(back[i].r.msg))
+                  strcpybuff(back[i].r.msg, "proxy CONNECT failed");
+                deletehttp(&back[i].r);
+                back[i].r.soc = INVALID_SOCKET;
+                back[i].r.statuscode = STATUSCODE_NON_FATAL;
+                back[i].status = STATUS_READY;
+                back_set_finished(sback, i);
+              }
+            }
             // handshake not yet launched
-            if (!back[i].r.ssl_con) {
+            if (tunnel_ok && !back[i].r.ssl_con) {
               SSL_CTX_set_options(openssl_ctx, SSL_OP_ALL);
               // new session
               back[i].r.ssl_con = SSL_new(openssl_ctx);
@@ -2551,7 +2727,7 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
                 back[i].r.statuscode = STATUSCODE_SSL_HANDSHAKE;
             }
             /* Error */
-            if (back[i].r.statuscode == STATUSCODE_SSL_HANDSHAKE) {
+            if (tunnel_ok && back[i].r.statuscode == STATUSCODE_SSL_HANDSHAKE) {
               strcpybuff(back[i].r.msg, "bad SSL/TLS handshake");
               deletehttp(&back[i].r);
               back[i].r.soc = INVALID_SOCKET;
@@ -2581,7 +2757,6 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
               back[i].rateout_time = back[i].ka_time_start;
             }
             // envoyer header
-            //if (strcmp(back[i].url_sav,BACK_ADD_TEST)!=0)    // vrai get
             HTS_STAT.stat_nrequests++;
             if (!back[i].head_request)
               http_sendhead(opt, opt->cookie, 0, back[i].send_too,
@@ -2648,7 +2823,6 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
 #if HTS_XGETHOST
       else if (back[i].status == STATUS_WAIT_DNS) {     // attendre gethostbyname
 #if DEBUGDNS
-        //printf("status 101 for %s\n",back[i].url_adr);
 #endif
 
         if (!gestion_timeout)
@@ -2768,10 +2942,10 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
           // range size hack old location
 
 #if HTS_DIRECTDISK
-          // Court-circuit:
-          // Peut-on stocker le fichier directement sur disque?
-          // Ahh que ca serait vachement mieux et que ahh que la mémoire vous dit merci!
-          if (back[i].status) {
+          // Shortcut: store the file directly on disk when possible,
+          // sparing memory
+          if (back[i].status &&
+              !back[i].locked) { // name still pending when locked
             if (back[i].r.is_write == 0) {      // mode mémoire
               if (back[i].r.adr == NULL) {      // rien n'a été écrit
                 if (!back[i].testmode) {        // pas mode test
@@ -2779,7 +2953,7 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
                     if (strcmp(back[i].url_fil, "/robots.txt")) {
                       if (back[i].r.statuscode == HTTP_OK) {    // 'OK'
                         if (!is_hypertext_mime(opt, back[i].r.contenttype, back[i].url_fil)) {  // pas HTML
-                          if (opt->getmode & 2) {       // on peut ecrire des non html
+                          if (opt->getmode & HTS_GETMODE_NONHTML) {
                             int fcheck = 0;
                             int last_errno = 0;
 
@@ -2852,7 +3026,7 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
                                 }
                               }
                             }
-                          } else {      // on coupe tout!
+                          } else { // on coupe tout!
                             hts_log_print(opt, LOG_DEBUG,
                                           "File cancelled (non HTML): %s%s",
                                           back[i].url_adr, back[i].url_fil);
@@ -2921,8 +3095,7 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
           // Si réception chunk, tester si on est pas à la fin!
           if (back[i].status == 1) {
             if (back[i].is_chunk) {     // attendre prochain chunk
-              if (back[i].r.size == back[i].r.totalsize) {      // fin chunk!
-                //printf("chunk end at %d\n",back[i].r.size);
+              if (back[i].r.size == back[i].r.totalsize) { // fin chunk!
                 back[i].status = STATUS_CHUNK_CR;       /* fetch ending CRLF */
                 if (back[i].chunk_adr != NULL) {
                   freet(back[i].chunk_adr);
@@ -2985,11 +3158,9 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
               back_finalize(opt, cache, sback, i);
             }
 
-            if (back[i].r.totalsize >= 0) {     // tester totalsize
-              //if ((back[i].r.totalsize>=0) && (back[i].status==STATUS_WAIT_HEADERS)) {    // tester totalsize
+            if (back[i].r.totalsize >= 0) { // tester totalsize
               if (back[i].r.totalsize != back[i].r.size) {      // pas la même!
                 if (!opt->tolerant) {
-                  //#if HTS_CL_IS_FATAL
                   deleteaddr(&back[i].r);
                   if (back[i].r.size < back[i].r.totalsize)
                     back[i].r.statuscode = STATUSCODE_CONNERROR;        // recatch
@@ -2998,14 +3169,13 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
                           " expected)", (LLint) back[i].r.size,
                           (LLint) back[i].r.totalsize);
                 } else {
-                  //#else
                   // Un warning suffira..
                   hts_log_print(opt, LOG_WARNING,
                                 "Incorrect length (" LLintP "!=" LLintP
-                                " expected) for %s%s", (LLint) back[i].r.size,
+                                " expected) for %s%s",
+                                (LLint) back[i].r.size,
                                 (LLint) back[i].r.totalsize, back[i].url_adr,
                                 back[i].url_fil);
-                  //#endif
                 }
               }
             }
@@ -3132,10 +3302,8 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
                          back[i].r.size);
 #endif
                   /* End */
-                  //if (back[i].status==STATUS_CHUNK_CR) {
-                  back[i].status = STATUS_READY;        // fin  
+                  back[i].status = STATUS_READY; // fin
                   back_set_finished(sback, i);
-                  //}
 
                   // finalize transfer if not temporary
                   if (!IS_DELAYED_EXT(back[i].url_sav)) {
@@ -3584,8 +3752,9 @@ 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);
@@ -3601,7 +3770,6 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
                                     back[i].url_adr, back[i].url_fil);
 
                       // finalize
-                      //file_notify(back[i].url_adr, back[i].url_fil, back[i].url_sav, 0, 0, back[i].r.notmodified);        // not modified
                       if (back[i].r.statuscode > 0) {
                         hts_log_print(opt, LOG_TRACE, "finalizing after cache load");
                         back_finalize(opt, cache, sback, i);
@@ -3611,38 +3779,32 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
                              back[i].url_adr, back[i].url_fil);
 #endif
 
-                      //printf(">%s status %d\n",back[p].r.contenttype,back[p].r.statuscode);
                     } else {    // erreur
                       back[i].status = STATUS_READY;    // terminé
                       back_set_finished(sback, i);
-                      //printf("erreur cache\n");
-
                     }
 
-/********** NO - must complete the body! ********** */
-#if 0
-                  } else if (HTTP_IS_REDIRECT(back[i].r.statuscode)
-                             || (back[i].r.statuscode == 412)
-                             || (back[i].r.statuscode == 416)
-                    ) {         // Ne pas prendre le html, erreurs connues et gérées
-#if HTS_DEBUG_CLOSESOCK
-                    DEBUG_W
-                      ("back_wait(301,302,303,307,412,416..): deletehttp\n");
-#endif
-                    // Couper connexion
-                    /*KA deletehttp(&back[i].r); back[i].r.soc=INVALID_SOCKET; */
-                    back_maydeletehttp(opt, cache, sback, i);
-
-                    back[i].status = STATUS_READY;      // terminé
+                  }
+                  // MIME type excluded by a -mime: filter: abort, don't fetch
+                  // the body (#58)
+                  else if (HTTP_IS_OK(back[i].r.statuscode) &&
+                           !back[i].testmode &&
+                           strnotempty(back[i].r.contenttype) &&
+                           hts_acceptmime(opt, 0, back[i].url_adr,
+                                          back[i].url_fil,
+                                          back[i].r.contenttype) == 1) {
+                    deletehttp(&back[i].r);
+                    back[i].r.soc = INVALID_SOCKET;
+                    back[i].status = STATUS_READY;
                     back_set_finished(sback, i);
-                    // finalize
-                    if (back[i].r.statuscode > 0) {
-                      hts_log_print(opt, LOG_TRACE, "finalizing redirect & 4xx");
-                      back_finalize(opt, cache, sback, i);
-                    }
-#endif
-/********** **************************** ********** */
-                  } else {      // il faut aller le chercher
+                    back[i].r.statuscode = STATUSCODE_EXCLUDED;
+                    strcpybuff(back[i].r.msg, "Excluded by MIME type filter");
+                    hts_log_print(
+                        opt, LOG_NOTICE,
+                        "File excluded by MIME type filter (%s): %s%s",
+                        back[i].r.contenttype, back[i].url_adr,
+                        back[i].url_fil);
+                  } else { // il faut aller le chercher
 
                     // effacer buffer (requète)
                     if (!noFreebuff) {
@@ -3653,35 +3815,70 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
                     // xxc SI CHUNK VERIFIER QUE CA MARCHE??
                     if (back[i].r.statuscode == 206) {  // on nous envoie un morceau (la fin) coz une partie sur disque!
                       off_t sz = fsize_utf8(back[i].url_sav);
+                      /* RFC 7233: resume at the server's Content-Range start,
+                         not the offset we requested; a server may resume
+                         earlier and appending the overlap duplicates bytes
+                         (#198). */
+                      const LLint resume = back[i].r.crange_start;
+                      const hts_boolean range_ok =
+                          back[i].r.crange > 0 && resume >= 0 &&
+                          resume <= (LLint) sz &&
+                          back[i].r.crange_end + 1 == back[i].r.crange &&
+                          (back[i].r.totalsize < 0 ||
+                           back[i].r.totalsize ==
+                               back[i].r.crange_end - resume + 1);
 
 #if HDEBUG
                       printf("partial content: " LLintP " on disk..\n",
                              (LLint) sz);
 #endif
-                      if (sz >= 0) {
+                      if (sz >= 0 && range_ok) {
                         if (!is_hypertext_mime(opt, back[i].r.contenttype, back[i].url_sav)) {  // pas HTML
-                          if (opt->getmode & 2) {       // on peut ecrire des non html  **sinon ben euhh sera intercepté plus loin, donc rap sur ce qui va sortir**
+                          if (opt->getmode & HTS_GETMODE_NONHTML) {
                             filenote(&opt->state.strc, back[i].url_sav, NULL);  // noter fichier comme connu
                             file_notify(opt, back[i].url_adr, back[i].url_fil,
                                         back[i].url_sav, 0, 1,
                                         back[i].r.notmodified);
-                            back[i].r.out = FOPEN(fconv(catbuff, sizeof(catbuff), back[i].url_sav), "ab");       // append
+                            back[i].r.out =
+                                FOPEN(fconv(catbuff, sizeof(catbuff),
+                                            back[i].url_sav),
+                                      "r+b"); // resume in place
                             if (back[i].r.out && opt->cache != 0) {
-                              back[i].r.is_write = 1;   // écrire
-                              back[i].r.size = sz;      // déja écrit
-                              back[i].r.statuscode = HTTP_OK;   // Forcer 'OK'
+                              back[i].r.is_write = 1;
+                              back[i].r.size = resume; // bytes already on disk
+                              back[i].r.statuscode = HTTP_OK; // force 'OK'
                               if (back[i].r.totalsize >= 0)
-                                back[i].r.totalsize += sz;      // plus en fait
-                              fseek(back[i].r.out, 0, SEEK_END);        // à la fin
-                              /* create a temporary reference file in case of broken mirror */
-                              if (back_serialize_ref(opt, &back[i]) != 0) {
-                                hts_log_print(opt, LOG_WARNING,
-                                              "Could not create temporary reference file for %s%s",
-                                              back[i].url_adr, back[i].url_fil);
-                              }
+                                back[i].r.totalsize += resume; // -> full size
+                              // drop bytes past the resume point; a silent
+                              // failure could leave a stale tail, so on error
+                              // drop the partial and refetch the whole file
+                              if (HTS_FTRUNCATE(back[i].r.out,
+                                                (off_t) resume) != 0) {
+                                fclose(back[i].r.out);
+                                back[i].r.out = NULL;
+                                url_savename_refname_remove(
+                                    opt, back[i].url_adr, back[i].url_fil);
+                                UNLINK(back[i].url_sav);
+                                back[i].status = STATUS_READY;
+                                back_set_finished(sback, i);
+                                strcpybuff(back[i].r.msg,
+                                           "Can not truncate partial file, "
+                                           "restarting");
+                              } else {
+                                fseeko(back[i].r.out, (off_t) resume, SEEK_SET);
+                                /* create a temporary reference file in case of
+                                 * broken mirror */
+                                if (back_serialize_ref(opt, &back[i]) != 0) {
+                                  hts_log_print(opt, LOG_WARNING,
+                                                "Could not create temporary "
+                                                "reference file for %s%s",
+                                                back[i].url_adr,
+                                                back[i].url_fil);
+                                }
 #if HDEBUG
-                              printf("continue interrupted file\n");
+                                printf("continue interrupted file\n");
 #endif
+                              }
                             } else {    // On est dans la m**
                               back[i].status = STATUS_READY;    // terminé (voir plus loin)
                               back_set_finished(sback, i);
@@ -3693,17 +3890,18 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
                           FILE *fp =
                             FOPEN(fconv(catbuff, sizeof(catbuff), back[i].url_sav), "rb");
                           if (fp) {
-                            LLint alloc_mem = sz + 1;
+                            LLint alloc_mem = resume + 1;
 
                             if (back[i].r.totalsize >= 0)
                               alloc_mem += back[i].r.totalsize; // AJOUTER RESTANT!
                             if (deleteaddr(&back[i].r)
                                 && (back[i].r.adr =
                                     (char *) malloct((size_t) alloc_mem))) {
-                              back[i].r.size = sz;
+                              back[i].r.size = resume;
                               if (back[i].r.totalsize >= 0)
-                                back[i].r.totalsize += sz;      // plus en fait
-                              if ((fread(back[i].r.adr, 1, sz, fp)) != sz) {
+                                back[i].r.totalsize += resume; // -> full size
+                              if ((fread(back[i].r.adr, 1, (size_t) resume,
+                                         fp)) != (size_t) resume) {
                                 back[i].status = STATUS_READY;  // terminé (voir plus loin)
                                 back_set_finished(sback, i);
                                 strcpybuff(back[i].r.msg,
@@ -3721,14 +3919,30 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
                                          "No memory for partial file");
                             }
                             fclose(fp);
-                          } else {      // Argh.. 
+                          } else {                              // open failed
                             back[i].status = STATUS_READY;      // terminé (voir plus loin)
                             back_set_finished(sback, i);
                             strcpybuff(back[i].r.msg,
                                        "Can not open partial file");
                           }
                         }
-                      } else {  // Non trouvé??
+                      } else if (sz >=
+                                 0) { // unusable range -> restart whole file
+                        hts_log_print(opt, LOG_WARNING,
+                                      "Unusable partial-content range for %s%s "
+                                      "(have " LLintP " bytes, got " LLintP
+                                      "-" LLintP "/" LLintP "), restarting",
+                                      back[i].url_adr, back[i].url_fil,
+                                      (LLint) sz, back[i].r.crange_start,
+                                      back[i].r.crange_end, back[i].r.crange);
+                        url_savename_refname_remove(opt, back[i].url_adr,
+                                                    back[i].url_fil);
+                        UNLINK(back[i].url_sav);
+                        back[i].status = STATUS_READY;
+                        back_set_finished(sback, i);
+                        strcpybuff(back[i].r.msg,
+                                   "Unusable partial content, restarting");
+                      } else {                          // partial not found
                         back[i].status = STATUS_READY;  // terminé (voir plus loin)
                         back_set_finished(sback, i);
                         strcpybuff(back[i].r.msg, "Can not find partial file");
@@ -3743,7 +3957,6 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
                           deletehttp(&back[i].r);
                         }
                         back[i].r.soc = INVALID_SOCKET;
-                        //back[i].r.statuscode=206;  ????????
                         back[i].r.statuscode = STATUSCODE_NON_FATAL;
                         if (strnotempty(back[i].r.msg))
                           strcpybuff(back[i].r.msg,
@@ -3764,10 +3977,13 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
                               && (back[i].r.adr = (char *) malloct(2))) {
                             back[i].r.adr[0] = 0;
                           }
-                          hts_log_print(opt, LOG_TRACE, "finalizing empty");
-                          back_finalize(opt, cache, sback, i);
-                        } else if (!back[i].r.is_chunk) {       // pas de chunk
-                          //if (back[i].r.http11!=2) {    // pas de chunk
+                          /* locked = name pending; the waiter finalizes after
+                             patching url_sav (else: cached as .delayed, #5) */
+                          if (!back[i].locked) {
+                            hts_log_print(opt, LOG_TRACE, "finalizing empty");
+                            back_finalize(opt, cache, sback, i);
+                          }
+                        } else if (!back[i].r.is_chunk) { // pas de chunk
                           back[i].is_chunk = 0;
                           back[i].status = 1;   // start body
                         } else {
@@ -3809,7 +4025,6 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
 
                       }
                     }
-
                   }
 
                   /*} */
@@ -3829,15 +4044,12 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
         if (back[i].status < 0) {
           if (!back[i].testmode) {      // pas en test
             UNLINK(back[i].url_sav);    // éliminer fichier (endommagé)
-            //printf("&& %s\n",back[i].url_sav);
           }
         }
 #endif
 
         /* funny log for commandline users */
-        //if (!opt->quiet) {  
-        // petite animation
-        if (opt->verbosedisplay == 1) {
+        if (opt->verbosedisplay == HTS_VERBOSE_SIMPLE) {
           if (back[i].status == STATUS_READY) {
             if (back[i].r.statuscode == HTTP_OK)
               printf("* %s%s (" LLintP " bytes) - OK" VT_CLREOL "\r",
@@ -3849,23 +4061,43 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
             fflush(stdout);
           }
         }
-        //}
 
       }                         // status>0
-    }                           // for
+    } // for
 
     // vérifier timeouts
     if (gestion_timeout) {
       TStamp act;
 
       act = time_local();       // temps en secondes
-      for(i_mod = 0; i_mod < (unsigned int) back_max; i_mod++) {
-        // for(i=0;i<back_max;i++) {
+      for (i_mod = 0; i_mod < (unsigned int) back_max; i_mod++) {
         unsigned int i = (i_mod + mod_random) % (back_max);
 
         if (back[i].status > 0) {       // réception/connexion/..
           if (back[i].timeout > 0) {
-            //printf("time check %d\n",((int) (act-back[i].timeout_refresh))-back[i].timeout);
+            // a stuck connect with a fallback address: retry the next one well
+            // before the full timeout (dead IPv6 on a dual-stack host, ...)
+            if (back[i].status == STATUS_CONNECTING) {
+              const hts_connect_fallback *const cf =
+                  &sback->connect_fallback[i];
+
+              if (back_connect_fallback_due(cf->addr_index, cf->addr_count,
+                                            (int) (act - cf->connect_start),
+                                            back[i].timeout)) {
+                if (back_connect_next(opt, sback, i)) {
+                  continue; // reconnected to the next candidate
+                }
+                // fallback was due but no socket could be opened
+                // (back_connect_next closed the dead one): stop now rather than
+                // spin on an invalid fd
+                back[i].r.soc = INVALID_SOCKET;
+                back[i].r.statuscode = STATUSCODE_CONNERROR;
+                strcpybuff(back[i].r.msg, "Connect Error");
+                back[i].status = STATUS_READY;
+                back_set_finished(sback, i);
+                continue;
+              }
+            }
             if (((int) (act - back[i].timeout_refresh)) >= back[i].timeout) {
               hts_log_print(opt, LOG_DEBUG, "connection timed out for %s%s", back[i].url_adr,
                 back[i].url_fil);
@@ -3941,6 +4173,11 @@ int back_checksize(httrackp * opt, lien_back * eback, int check_only_totalsize)
   return 1;
 }
 
+/* Grace left to the smooth stop before in-flight transfers are aborted. */
+static int back_maxtime_grace(const int maxtime) {
+  return maximum(5, minimum(30, maxtime / 10));
+}
+
 int back_checkmirror(httrackp * opt) {
   // Check max size
   if ((opt->maxsite > 0) && (HTS_STAT.stat_bytes >= opt->maxsite)) {
@@ -3957,13 +4194,19 @@ int back_checkmirror(httrackp * opt) {
      */
   }
   // Check max time
-  if ((opt->maxtime > 0)
-      && ((time_local() - HTS_STAT.stat_timestart) >= opt->maxtime)) {
-    if (!opt->state.stop) {     /* not yet stopped */
-      hts_log_print(opt, LOG_ERROR, "More than %d seconds passed.. giving up",
-                    opt->maxtime);
-      /* cancel mirror smoothly */
-      hts_request_stop(opt, 0);
+  if (opt->maxtime > 0) {
+    const TStamp elapsed = time_local() - HTS_STAT.stat_timestart;
+
+    if (elapsed >= opt->maxtime) {
+      if (!opt->state.stop) { /* not yet stopped */
+        hts_log_print(opt, LOG_ERROR, "More than %d seconds passed.. giving up",
+                      opt->maxtime);
+        /* cancel mirror smoothly */
+        hts_request_stop(opt, 0);
+      }
+      /* smooth stop starved past the grace period: stop waiting (#481) */
+      if (elapsed - opt->maxtime >= back_maxtime_grace(opt->maxtime))
+        return 0;
     }
   }
   return 1;                     /* Ok, go on */

src/htsback.h

@@ -113,6 +113,12 @@ void back_set_locked(struct_back * sback, const int p);
 void back_set_unlocked(struct_back * sback, const int p);
 int back_delete(httrackp * opt, cache_back * cache, struct_back * sback,
                 const int p);
+/* Discard back's on-disk .delayed placeholder and its refname. */
+void back_delayed_discard(httrackp *opt, lien_back *back);
+/* Move back's .delayed placeholder (and open stream) to newname;
+   HTS_FALSE = file lost, slot flagged in error. */
+hts_boolean back_delayed_rename(httrackp *opt, lien_back *back,
+                                const char *newname);
 void back_index_unlock(struct_back * sback, const int p);
 int back_clear_entry(lien_back * back);
 int back_flush_output(httrackp * opt, cache_back * cache, struct_back * sback,
@@ -136,6 +142,8 @@ void back_solve(httrackp * opt, lien_back * sback);
 int host_wait(httrackp * opt, lien_back * sback);
 #endif
 int back_checksize(httrackp * opt, lien_back * eback, int check_only_totalsize);
+/* Enforce -M/-E quotas: requests a smooth stop when reached; returns 0 once
+   the -E deadline overran its grace period (callers must stop waiting). */
 int back_checkmirror(httrackp * opt);
 
 #endif

src/htsbase.h

@@ -63,12 +63,15 @@ extern "C" {
 #endif
 #include <assert.h>
 
-/* GCC extension */
+/* Compiler-portability attribute macros (no-ops on non-GCC). */
 #ifndef HTS_UNUSED
 #ifdef __GNUC__
 #define HTS_UNUSED __attribute__ ((unused))
+
 #define HTS_STATIC static __attribute__ ((unused))
+
 #define HTS_INLINE __inline__
+/* printf-style format check; fmt/arg are 1-based argument positions. */
 #define HTS_PRINTF_FUN(fmt, arg) __attribute__ ((format (printf, fmt, arg)))
 #else
 #define HTS_UNUSED
@@ -78,29 +81,37 @@ extern "C" {
 #endif
 #endif
 
+/* min/max evaluate their arguments twice; pass side-effect-free expressions. */
 #undef min
 #undef max
 #define min(a,b) ((a)>(b)?(b):(a))
+
 #define max(a,b) ((a)>(b)?(a):(b))
 
 #ifndef _WIN32
 #undef Sleep
 #define min(a,b) ((a)>(b)?(b):(a))
+
 #define max(a,b) ((a)>(b)?(a):(b))
+
+/* Win32 Sleep() shim for POSIX; argument is milliseconds. */
 #define Sleep(a) { if (((a)*1000)%1000000) usleep(((a)*1000)%1000000); if (((a)*1000)/1000000) sleep(((a)*1000)/1000000); }
 #endif
 
-// teste égalité de 2 chars, case insensitive
+/* hichar: ASCII uppercasing of one char. streql: case-insensitive equality of
+   two chars. ASCII only; not locale-aware. */
 #define hichar(a) ((((a)>='a') && ((a)<='z')) ? ((a)-('a'-'A')) : (a))
+
 #define streql(a,b) (hichar(a)==hichar(b))
 
-// caractère maj
+/* True if c is an ASCII uppercase letter. */
 #define isUpperLetter(a) ( ((a) >= 'A') && ((a) <= 'Z') )
 
-/* Library internal definictions */
+/* Library-internal only (engine translation units that define
+   HTS_INTERNAL_BYTECODE); not part of the consumer surface. */
 #ifdef HTS_INTERNAL_BYTECODE
 
-// functions
+/* Resolve a symbol in an already-loaded dynamic module. */
 #ifdef _WIN32
 #define DynamicGet(handle, sym) GetProcAddress(handle, sym)
 #else

src/htsbasenet.h

@@ -31,12 +31,17 @@ Please visit our Website: http://www.httrack.com
 /* Author: Xavier Roche                                         */
 /* ------------------------------------------------------------ */
 
+/** @file htsbasenet.h
+    Base networking definitions: platform socket headers, the optional global
+    OpenSSL context, and the status-code/connection-state enumerations stored in
+    htsblk and lien_back. Pulled in by htsnet.h. */
+
 #ifndef HTS_DEFBASENETH
 #define HTS_DEFBASENETH
 
 #ifdef _WIN32
 
-#if HTS_INET6==0
+#if HTS_INET6 == 0
 #include <winsock2.h>
 #else
 
@@ -44,13 +49,12 @@ Please visit our Website: http://www.httrack.com
 #define WIN32_LEAN_AND_MEAN
 // KB955045 (http://support.microsoft.com/kb/955045)
 // To execute an application using this function on earlier versions of Windows
-// (Windows 2000, Windows NT, and Windows Me/98/95), then it is mandatary to #include Ws2tcpip.h
-// and also Wspiapi.h. When the Wspiapi.h header file is included, the 'getaddrinfo' function is
-// #defined to the 'WspiapiGetAddrInfo' inline function in Wspiapi.h. 
+// (Windows 2000, Windows NT, and Windows Me/98/95), then it is mandatary to
+// #include Ws2tcpip.h and also Wspiapi.h. When the Wspiapi.h header file is
+// included, the 'getaddrinfo' function is #defined to the 'WspiapiGetAddrInfo'
+// inline function in Wspiapi.h.
 #include <ws2tcpip.h>
 #include <Wspiapi.h>
-//#include <winsock2.h>
-//#include <tpipv6.h>
 
 #endif
 
@@ -80,7 +84,8 @@ extern "C" {
 /* OpenSSL structure */
 #include <openssl/bio.h>
 
-/* Global SSL context */
+/** Process-wide OpenSSL client context, created lazily on first TLS use;
+    shared by all connections. NULL until initialized. */
 extern SSL_CTX *openssl_ctx;
 
 #endif
@@ -122,6 +127,8 @@ typedef enum HTTPStatusCode {
   HTTP_UNSUPPORTED_MEDIA_TYPE = 415,
   HTTP_REQUESTED_RANGE_NOT_SATISFIABLE = 416,
   HTTP_EXPECTATION_FAILED = 417,
+  HTTP_TOO_MANY_REQUESTS = 429,
+  HTTP_UNAVAILABLE_FOR_LEGAL_REASONS = 451,
   HTTP_INTERNAL_SERVER_ERROR = 500,
   HTTP_NOT_IMPLEMENTED = 501,
   HTTP_BAD_GATEWAY = 502,
@@ -139,7 +146,8 @@ typedef enum BackStatusCode {
   STATUSCODE_NON_FATAL = -5,
   STATUSCODE_SSL_HANDSHAKE = -6,
   STATUSCODE_TOO_BIG = -7,
-  STATUSCODE_TEST_OK = -10
+  STATUSCODE_TEST_OK = -10,
+  STATUSCODE_EXCLUDED = -11 /* aborted: MIME excluded by a -mime: filter */
 } BackStatusCode;
 
 /** HTTrack status ('status' member of of 'lien_back') **/

src/htsbasiccharsets.sh

@@ -3,57 +3,59 @@
 
 # Change this to download files
 if false; then
-echo "mget ftp://ftp.unicode.org/Public/MAPPINGS/ISO8859/8859-*.TXT" | lftp
-echo "mget ftp://ftp.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/PC/CP*.TXT" | lftp
-echo "mget ftp://ftp.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/WINDOWS/CP*.TXT" | lftp
-echo "mget ftp://ftp.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/EBCDIC/CP*.TXT" | lftp
-echo "mget ftp://ftp.unicode.org/Public/MAPPINGS/VENDORS/MISC/CP*.TXT" | lftp
-echo "mget ftp://ftp.unicode.org/Public/MAPPINGS/VENDORS/MISC/KOI8*.TXT" | lftp
-rm -f CP932.TXT CP936.TXT CP949.TXT CP950.TXT
+    echo "mget https://www.unicode.org/Public/MAPPINGS/ISO8859/8859-*.TXT" | lftp
+    echo "mget https://www.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/PC/CP*.TXT" | lftp
+    echo "mget https://www.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/WINDOWS/CP*.TXT" | lftp
+    echo "mget https://www.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/EBCDIC/CP*.TXT" | lftp
+    echo "mget https://www.unicode.org/Public/MAPPINGS/VENDORS/MISC/CP*.TXT" | lftp
+    echo "mget https://www.unicode.org/Public/MAPPINGS/VENDORS/MISC/KOI8*.TXT" | lftp
+    rm -f CP932.TXT CP936.TXT CP949.TXT CP950.TXT
 fi
 
 # Produce code
-printf "/** GENERATED FILE ($0), DO NOT EDIT **/\n\n"
-for i in *.TXT ; do
-  echo "processing $i" >&2
-  grep -vE "^(#|$)" $i | grep -E "^0x" | sed -e 's/[[:space:]]/ /g' | cut -f1,2 -d' ' | \
-  (
-    unset arr
-    while read LINE ; do
-      from=$[$(echo $LINE | cut -f1 -d' ')]
-      if ! test -n "$from"; then
-        echo "error with $i" >&2
-        exit 1
-      elif test $from -ge 256; then
-        echo "out-of-range ($LINE) with $i" >&2
-        exit 1
-      fi
-      to=$(echo $LINE | cut -f2 -d' ') 
-      arr[$from]=$to
-    done
-    name=$(echo $i | tr 'A-Z' 'a-z' | tr '-' '_' | sed -e 's/\.txt//' -e 's/8859/iso_8859/')
-    printf "/* Table for $i */\nstatic const hts_UCS4 table_${name}[256] = {\n  "
-    i=0
-    while test "$i" -lt 256; do
-      if test "$i" -gt 0; then
-        printf ", "
-        if test $[${i}%8] -eq 0; then
-          printf "\n  "
-        fi
-      fi
-      value=${arr[$i]:-0}
-      printf "0x%04x" $value
-      i=$[${i}+1]
-    done
-    printf " };\n\n"
-  )
-  echo "processed $i" >&2
+printf '/** GENERATED FILE (%s), DO NOT EDIT **/\n\n' "$0"
+for i in *.TXT; do
+    echo "processing $i" >&2
+    grep -vE "^(#|$)" "$i" | grep -E "^0x" | sed -e 's/[[:space:]]/ /g' | cut -f1,2 -d' ' |
+        (
+            unset arr
+            while read -r LINE; do
+                from=$(($(echo "$LINE" | cut -f1 -d' ')))
+                if ! test -n "$from"; then
+                    echo "error with $i" >&2
+                    exit 1
+                elif test $from -ge 256; then
+                    echo "out-of-range ($LINE) with $i" >&2
+                    exit 1
+                fi
+                to=$(echo "$LINE" | cut -f2 -d' ')
+                arr[from]=$to
+            done
+            # shellcheck disable=SC2018,SC2019 # charset filenames are ASCII; keep C-locale A-Z/a-z
+            name=$(echo "$i" | tr 'A-Z' 'a-z' | tr '-' '_' | sed -e 's/\.txt//' -e 's/8859/iso_8859/')
+            printf '/* Table for %s */\nstatic const hts_UCS4 table_%s[256] = {\n  ' "$i" "$name"
+            idx=0
+            while test "$idx" -lt 256; do
+                if test "$idx" -gt 0; then
+                    printf ", "
+                    if test $((idx % 8)) -eq 0; then
+                        printf "\n  "
+                    fi
+                fi
+                value=${arr[$idx]:-0}
+                printf "0x%04x" "$value"
+                idx=$((idx + 1))
+            done
+            printf " };\n\n"
+        )
+    echo "processed $i" >&2
 done
 
 # Indexes
 printf "static const struct {\n  const char *name;\n  const hts_UCS4 *table;\n} table_mappings[] = {\n"
-for i in *.TXT ; do
-  name=$(echo $i | tr 'A-Z' 'a-z' | tr '-' '_' | sed -e 's/\.txt//' -e 's/8859/iso_8859/')
-  printf "  { \"$(echo $name | tr -d '_')\", table_${name} },\n"
+for i in *.TXT; do
+    # shellcheck disable=SC2018,SC2019 # charset filenames are ASCII; keep C-locale A-Z/a-z
+    name=$(echo "$i" | tr 'A-Z' 'a-z' | tr '-' '_' | sed -e 's/\.txt//' -e 's/8859/iso_8859/')
+    printf '  { "%s", table_%s },\n' "$(echo "$name" | tr -d '_')" "$name"
 done
 printf "  { NULL, NULL }\n};\n"

src/htsbauth.c

@@ -107,7 +107,6 @@ int cookie_add(t_cookie * cookie, const char *cook_name, const char *cook_value,
 #if DEBUG_COOK
   printf("add_new cookie: name=\"%s\" value=\"%s\" domain=\"%s\" path=\"%s\"\n",
          cook_name, cook_value, domain, path);
-  //printf(">>>cook: %s<<<\n",cookie->data);
 #endif
   return 0;
 }
@@ -208,8 +207,6 @@ int cookie_load(t_cookie * cookie, const char *fpath, const char *name) {
   char catbuff[CATBUFF_SIZE];
   char buffer[8192];
 
-  //  cookie->data[0]='\0';
-
   // Fusionner d'abord les éventuels cookies IE
 #ifdef _WIN32
   {

src/htsbauth.h

@@ -31,51 +31,80 @@ Please visit our Website: http://www.httrack.com
 /* Author: Xavier Roche                                         */
 /* ------------------------------------------------------------ */
 
+/** @file htsbauth.h
+    HTTP Basic authentication storage: a per-session list of (URL-prefix,
+    credentials) pairs, plus the cookie jar that holds it. */
+
 #ifndef HTSBAUTH_DEFH
 #define HTSBAUTH_DEFH
 
 #include <sys/types.h>
 
-// robots wizard
+/** One stored credential: the longest-prefix match against a request's
+    host+path selects which auth header to send. */
 #ifndef HTS_DEF_FWSTRUCT_bauth_chain
 #define HTS_DEF_FWSTRUCT_bauth_chain
 typedef struct bauth_chain bauth_chain;
 #endif
 struct bauth_chain {
-  char prefix[1024];            /* www.foo.com/secure/ */
-  char auth[1024];              /* base-64 encoded user:pass */
-  struct bauth_chain *next;     /* next element */
+  char prefix[1024]; /* host + path prefix, e.g. www.foo.com/secure/ */
+  char auth[1024];   /* base-64 encoded user:pass (Authorization payload) */
+  struct bauth_chain *next; /* next element, NULL-terminated list */
 };
 
-// buffer pour les cookies et authentification
+/** Per-session cookie jar; also holds the basic-auth list head (auth).
+    The head node (auth) is embedded, not heap-allocated. */
 #ifndef HTS_DEF_FWSTRUCT_t_cookie
 #define HTS_DEF_FWSTRUCT_t_cookie
 typedef struct t_cookie t_cookie;
 #endif
 struct t_cookie {
-  int max_len;
-  char data[32768];
-  bauth_chain auth;
+  int max_len;      /* capacity of data[] in use */
+  char data[32768]; /* raw cookie store (NUL-terminated field list) */
+  bauth_chain auth; /* embedded head of the basic-auth list */
 };
 
 /* Library internal definictions */
 #ifdef HTS_INTERNAL_BYTECODE
 
-// cookies
-int cookie_add(t_cookie * cookie, const  char *cook_name, const  char *cook_value,
-               const  char *domain, const  char *path);
-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);
+/* cookies */
+int cookie_add(t_cookie *cookie, const char *cook_name, const char *cook_value,
+               const char *domain, const char *path);
+
+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, 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_find(char *s, const char *cook_name, const char *domain,
+                  const char *path);
+
 char *cookie_nextfield(char *a);
 
-// basic auth
-int bauth_add(t_cookie * cookie, const char *adr, const char *fil, const char *auth);
-char *bauth_check(t_cookie * cookie, const char *adr, const char *fil);
+/* basic auth */
+
+/** Register credentials (auth = base-64 user:pass) for the prefix derived from
+    adr (host) and fil (path). No-op returning 0 if cookie is NULL, allocation
+    fails, or a matching prefix is already stored; returns 1 on insertion. */
+int bauth_add(t_cookie *cookie, const char *adr, const char *fil,
+              const char *auth);
+
+/** Return the stored base-64 credentials whose prefix matches adr+fil, or NULL
+    if none (or cookie is NULL). Returned pointer aliases the jar's bauth_chain;
+    caller must not free it. */
+char *bauth_check(t_cookie *cookie, const char *adr, const char *fil);
+
+/** Build the auth lookup key (host + path, query string stripped, truncated at
+    the last '/') from adr and fil into prefix; returns prefix. Caller must
+    supply a buffer of HTS_URLMAXSIZE * 2 bytes. */
 char *bauth_prefix(char *buffer, const char *adr, const char *fil);
 
 #endif

src/htscache.c

@@ -40,6 +40,7 @@ Please visit our Website: http://www.httrack.com
 #include "htscore.h"
 #include "htsbasenet.h"
 #include "htsmd5.h"
+#include <limits.h>
 #include <time.h>
 
 #include "htszlib.h"
@@ -220,6 +221,40 @@ struct cache_back_zip_entry {
 	} \
 } while(0)
 
+/* Consecutive entry write failures before the cache stream is declared dead. */
+#define CACHE_MAX_WRITE_FAILURES 8
+
+/* Cache write failed: a fatal errno or a failure streak aborts the mirror
+   (exit_xh); an isolated failure only drops the current entry. */
+static void cache_zip_write_failed(httrackp *opt, cache_back *cache,
+                                   const char *what, int zErr,
+                                   hts_boolean entry_open, const char *url_adr,
+                                   const char *url_fil) {
+  const int fatal_errno = zErr == ZIP_ERRNO && check_fatal_io_errno();
+
+  cache->zipWriteFailures++;
+  if (fatal_errno || cache->zipWriteFailures >= CACHE_MAX_WRITE_FAILURES) {
+    if (!cache->zipWriteFailed) {
+      cache->zipWriteFailed = HTS_TRUE;
+      if (fatal_errno) {
+        hts_log_print(opt, LOG_ERROR,
+                      "Mirror aborted: disk full or filesystem problems");
+      } else {
+        hts_log_print(opt, LOG_ERROR,
+                      "Mirror aborted: cache write failed (%s): %s", what,
+                      hts_get_zerror(zErr));
+      }
+    }
+    opt->state.exit_xh = -1; /* fatal: stop the mirror, exit non-zero */
+  } else {
+    if (entry_open)
+      zipCloseFileInZip((zipFile) cache->zipOutput); /* abandon, best-effort */
+    hts_log_print(opt, LOG_WARNING,
+                  "cache write failed (%s: %s), entry not cached: %s%s", what,
+                  hts_get_zerror(zErr), url_adr, url_fil);
+  }
+}
+
 /* Ajout d'un fichier en cache */
 void cache_add(httrackp * opt, cache_back * cache, const htsblk * r,
                const char *url_adr, const char *url_fil, const char *url_save,
@@ -230,12 +265,14 @@ void cache_add(httrackp * opt, cache_back * cache, const htsblk * r,
   char BIGSTK headers[8192];
   int headersSize = 0;
 
-  //int entryBodySize = 0;
-  //int entryFilenameSize = 0;
   zip_fileinfo fi;
   const char *url_save_suffix = url_save;
   int zErr;
 
+  /* already failed and aborting; don't touch the broken stream again */
+  if (cache->zipWriteFailed)
+    return;
+
   // robots.txt hack
   if (url_save == NULL) {
     dataincache = 0;            // testing links
@@ -263,10 +300,19 @@ void cache_add(httrackp * opt, cache_back * cache, const htsblk * r,
   if (r->size < 0)              // error
     return;
 
-  // data in cache
-  if (dataincache) {
-    assertf(((int) r->size) == r->size);
-    //entryBodySize = (int) r->size;
+  // data in cache: the body must fit the 32-bit zip write API
+  if (dataincache && (LLint) (int) r->size != r->size) {
+    if (r->is_write && url_save != NULL && strnotempty(url_save)) {
+      hts_log_print(opt, LOG_WARNING,
+                    "file too large for the cache, storing headers only: %s%s",
+                    url_adr, url_fil);
+      dataincache = 0;
+    } else {
+      hts_log_print(opt, LOG_WARNING,
+                    "entry too large for the cache, not cached: %s%s", url_adr,
+                    url_fil);
+      return;
+    }
   }
 
   /* Fields */
@@ -311,8 +357,6 @@ void cache_add(httrackp * opt, cache_back * cache, const htsblk * r,
   ZIP_FIELD_STRING(headers, headersSize, "X-Fil", url_fil);     // Original URI filename
   ZIP_FIELD_STRING(headers, headersSize, "X-Save", url_save_suffix);    // Original save filename
 
-  //entryFilenameSize = (int) ( strlen(url_adr) + strlen(url_fil));
-
   /* Filename */
   if (!link_has_authority(url_adr)) {
     strcpybuff(filename, "http://");
@@ -346,9 +390,9 @@ void cache_add(httrackp * opt, cache_back * cache, const htsblk * r,
                                    */
                                   headers, (uInt) strlen(headers), NULL, 0, NULL,       /* comment */
                                   Z_DEFLATED, Z_DEFAULT_COMPRESSION)) != Z_OK) {
-    int zip_zipOpenNewFileInZip_failed = 0;
-
-    assertf(zip_zipOpenNewFileInZip_failed);
+    cache_zip_write_failed(opt, cache, "opening a cache entry", zErr, HTS_FALSE,
+                           url_adr, url_fil);
+    return;
   }
 
   /* Write data in cache */
@@ -358,9 +402,9 @@ void cache_add(httrackp * opt, cache_back * cache, const htsblk * r,
         if ((zErr =
              zipWriteInFileInZip((zipFile) cache->zipOutput, r->adr,
                                  (int) r->size)) != Z_OK) {
-          int zip_zipWriteInFileInZip_failed = 0;
-
-          assertf(zip_zipWriteInFileInZip_failed);
+          cache_zip_write_failed(opt, cache, "writing to the cache", zErr,
+                                 HTS_TRUE, url_adr, url_fil);
+          return;
         }
       }
     } else {
@@ -381,9 +425,10 @@ void cache_add(httrackp * opt, cache_back * cache, const htsblk * r,
               if ((zErr =
                    zipWriteInFileInZip((zipFile) cache->zipOutput, buff,
                                        (int) nl)) != Z_OK) {
-                int zip_zipWriteInFileInZip_failed = 0;
-
-                assertf(zip_zipWriteInFileInZip_failed);
+                cache_zip_write_failed(opt, cache, "writing to the cache", zErr,
+                                       HTS_TRUE, url_adr, url_fil);
+                fclose(fp);
+                return;
               }
             }
           } while(nl > 0);
@@ -397,17 +442,19 @@ void cache_add(httrackp * opt, cache_back * cache, const htsblk * r,
 
   /* Close */
   if ((zErr = zipCloseFileInZip((zipFile) cache->zipOutput)) != Z_OK) {
-    int zip_zipCloseFileInZip_failed = 0;
-
-    assertf(zip_zipCloseFileInZip_failed);
+    cache_zip_write_failed(opt, cache, "closing a cache entry", zErr, HTS_FALSE,
+                           url_adr, url_fil);
+    return;
   }
 
   /* Flush */
   if ((zErr = zipFlush((zipFile) cache->zipOutput)) != 0) {
-    int zip_zipFlush_failed = 0;
-
-    assertf(zip_zipFlush_failed);
+    cache_zip_write_failed(opt, cache, "flushing the cache", zErr, HTS_FALSE,
+                           url_adr, url_fil);
+    return;
   }
+
+  cache->zipWriteFailures = 0; /* entry stored: reset the failure streak */
 }
 
 #else
@@ -576,15 +623,18 @@ htsblk cache_read_ro(httrackp * opt, cache_back * cache, const char *adr,
   return cache_readex(opt, cache, adr, fil, save, location, NULL, 1);
 }
 
-htsblk cache_read_including_broken(httrackp * opt, cache_back * cache,
-                                   const char *adr, const char *fil) {
-  htsblk r = cache_read(opt, cache, adr, fil, NULL, NULL);
+htsblk cache_read_including_broken(httrackp *opt, cache_back *cache,
+                                   const char *adr, const char *fil,
+                                   char *return_save) {
+  htsblk r = cache_readex(opt, cache, adr, fil, NULL, NULL, return_save, 0);
 
   if (r.statuscode == -1) {
     lien_back *itemback = NULL;
 
     if (back_unserialize_ref(opt, adr, fil, &itemback) == 0) {
       r = itemback->r;
+      if (return_save != NULL)
+        strlcpybuff(return_save, itemback->url_sav, HTS_URLMAXSIZE * 2);
       /* cleanup */
       back_clear_entry(itemback);       /* delete entry content */
       freet(itemback);          /* delete item */
@@ -671,7 +721,6 @@ static htsblk cache_readex_new(httrackp * opt, cache_back * cache,
         char BIGSTK headerBuff[8192 + 2];
         int readSizeHeader;
 
-        //int totalHeader = 0;
         int dataincache = 0;
 
         /* For BIG comments */
@@ -722,13 +771,10 @@ static htsblk cache_readex_new(httrackp * opt, cache_back * cache,
                                    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_,
                                    sizeof(previous_save_));
             }
-          } while(offset < readSizeHeader && !lineEof);
-          //totalHeader = offset;
+          } while (offset < readSizeHeader && !lineEof);
 
           /* Previous entry */
           if (previous_save_[0] != '\0') {
@@ -745,6 +791,15 @@ static htsblk cache_readex_new(httrackp * opt, cache_back * cache,
             strlcpybuff(return_save, previous_save, HTS_URLMAXSIZE * 2);
           }
 
+          /* A negative X-Size is corrupt; so is one >= INT_MAX when the data
+             is in the zip (the write path asserts int-sized). Headers-only
+             entries legitimately exceed INT_MAX (>2GB body on disk): keep
+             them, or every update would re-fetch the file. */
+          if (r.size < 0 || (dataincache && r.size >= INT_MAX)) {
+            r.statuscode = STATUSCODE_INVALID;
+            strcpybuff(r.msg, "Cache Read Error : Bad Size");
+          }
+
           /* Complete fields */
           r.totalsize = r.size;
           r.adr = NULL;
@@ -771,7 +826,8 @@ static htsblk cache_readex_new(httrackp * opt, cache_back * cache,
             }                   // otherwise, the ZIP file is supposed to be consistent with data.
           }
           /* Read data ? */
-          else {                /* ne pas lire uniquement header */
+          else if (r.statuscode !=
+                   STATUSCODE_INVALID) { /* ne pas lire uniquement header */
             int ok = 0;
 
 #if HTS_DIRECTDISK
@@ -900,7 +956,6 @@ static htsblk cache_readex_new(httrackp * opt, cache_back * cache,
                   r.statuscode = STATUSCODE_INVALID;
                   strcpybuff(r.msg,
                              "Cache Write Error : Unable to Create File");
-                  //printf("%s\n",save);
                 }
               }
 
@@ -935,11 +990,14 @@ static htsblk cache_readex_new(httrackp * opt, cache_back * cache,
                     strcpybuff(r.msg,
                                "Previous cache file not found (empty filename)");
                   }
-                } else {        /* Read in memory from disk */
+                } else if (r.size >= INT_MAX) { /* too big to read in memory */
+                  r.statuscode = STATUSCODE_INVALID;
+                  strcpybuff(r.msg, "Cache Read Error : Bad Size");
+                } else { /* Read in memory from disk */
                   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) {
@@ -948,7 +1006,8 @@ 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,
@@ -965,7 +1024,7 @@ 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);
@@ -974,7 +1033,6 @@ static htsblk cache_readex_new(httrackp * opt, cache_back * cache,
                     strcpybuff(r.msg, "Cache Read Error : Read Data");
                   } else
                     *(r.adr + r.size) = '\0';
-                  //printf(">%s status %d\n",back[p].r.contenttype,back[p].r.statuscode);
                 } else {        // erreur
                   r.statuscode = STATUSCODE_INVALID;
                   strcpybuff(r.msg, "Cache Memory Error");
@@ -1153,17 +1211,14 @@ static htsblk cache_readex_old(httrackp * opt, cache_back * cache,
         // sécurité
         r.adr = NULL;
         r.out = NULL;
-        ////r.location=NULL;  non, fixée lors des 301 ou 302
         r.fp = NULL;
 
         if ((r.statuscode >= 0) && (r.statuscode <= 999)
             && (r.notmodified >= 0) && (r.notmodified <= 9)) {  // petite vérif intégrité
-          if ((save) && (!header_only)) {       /* ne pas lire uniquement header */
-            //int to_file=0;
+          if ((save) && (!header_only)) { /* ne pas lire uniquement header */
 
             r.adr = NULL;
             r.soc = INVALID_SOCKET;
-            // // r.location=NULL;
 
 #if HTS_DIRECTDISK
             // Court-circuit:
@@ -1172,12 +1227,11 @@ static htsblk cache_readex_old(httrackp * opt, cache_back * cache,
               int ok = 0;
 
               r.is_write = 1;   // écrire
-              if (fexist_utf8(fconv(catbuff, sizeof(catbuff), save))) {  // un fichier existe déja
-                //if (fsize_utf8(fconv(save))==r.size) {  // même taille -- NON tant pis (taille mal declaree)
+              if (fexist_utf8(fconv(catbuff, sizeof(catbuff),
+                                    save))) { // un fichier existe déja
                 ok = 1;         // plus rien à faire
                 filenote(&opt->state.strc, save, NULL); // noter comme connu
                 file_notify(opt, adr, fil, save, 0, 0, 0);
-                //}
               }
 
               if ((pos < 0) && (!ok)) { // Pas de donnée en cache et fichier introuvable : erreur!
@@ -1228,7 +1282,6 @@ static htsblk cache_readex_old(httrackp * opt, cache_back * cache,
                   r.statuscode = STATUSCODE_INVALID;
                   strcpybuff(r.msg,
                              "Cache Write Error : Unable to Create File");
-                  //printf("%s\n",save);
                 }
               }
 
@@ -1245,13 +1298,14 @@ 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,
@@ -1266,7 +1320,7 @@ 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);
@@ -1275,14 +1329,13 @@ static htsblk cache_readex_old(httrackp * opt, cache_back * cache,
                     strcpybuff(r.msg, "Cache Read Error : Read Data");
                   } else
                     *(r.adr + r.size) = '\0';
-                  //printf(">%s status %d\n",back[p].r.contenttype,back[p].r.statuscode);
                 } else {        // erreur
                   r.statuscode = STATUSCODE_INVALID;
                   strcpybuff(r.msg, "Cache Memory Error");
                 }
               }
             }
-          }                     // si save==null, ne rien charger (juste en tête)
+          } // si save==null, ne rien charger (juste en tête)
         } else {
 #if DEBUGCA
           printf("Cache Read Error : Bad Data");
@@ -1369,10 +1422,11 @@ 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;
@@ -1394,6 +1448,86 @@ static int hts_rename(httrackp * opt, const char *a, const char *b) {
   return rename(a, b);
 }
 
+/* Pathname of a file inside the mirror dir (rotating concat buffer). */
+static char *reconcile_path(httrackp *opt, const char *name) {
+  return fconcat(OPT_GET_BUFF(opt), OPT_GET_BUFF_SIZE(opt),
+                 StringBuff(opt->path_log), name);
+}
+
+/* Interrupted-run heuristic: prefer the old generation when the new cache
+   stalled below NEW_TINY while the old one grew past OLD_SOLID (historical
+   arbitrary thresholds). */
+#define CACHE_RECONCILE_NEW_TINY 32768
+#define CACHE_RECONCILE_OLD_SOLID 65536
+
+/* Replace the new-generation file by the old one, when the old one exists. */
+static void reconcile_promote(httrackp *opt, const char *oldname,
+                              const char *newname) {
+  if (fexist(reconcile_path(opt, oldname))) {
+    remove(reconcile_path(opt, newname));
+    rename(reconcile_path(opt, oldname), reconcile_path(opt, newname));
+  }
+}
+
+void hts_cache_reconcile(httrackp *opt, hts_cache_reconcile_mode mode) {
+  switch (mode) {
+  case CACHE_RECONCILE_PROMOTE:
+    /* Previous run rotated new.* to old.* then died before writing: promote
+       the old generation back, whichever format it uses. */
+    if (!fexist(reconcile_path(opt, "hts-cache/new.zip")))
+      reconcile_promote(opt, "hts-cache/old.zip", "hts-cache/new.zip");
+    if ((!fexist(reconcile_path(opt, "hts-cache/new.dat")) ||
+         !fexist(reconcile_path(opt, "hts-cache/new.ndx"))) &&
+        fexist(reconcile_path(opt, "hts-cache/old.dat")) &&
+        fexist(reconcile_path(opt, "hts-cache/old.ndx"))) {
+      reconcile_promote(opt, "hts-cache/old.dat", "hts-cache/new.dat");
+      reconcile_promote(opt, "hts-cache/old.ndx", "hts-cache/new.ndx");
+    }
+    break;
+  case CACHE_RECONCILE_INTERRUPTED:
+    /* Aborted run: keep the larger generation when the new cache is
+       suspiciously small next to the old one. The new file must exist: fsize()
+       is -1 for a missing file, which would spuriously pass the "< TINY" test
+       and overwrite a solid old generation that PROMOTE/ROLLBACK should keep.
+     */
+    if (!opt->cache || !fexist(reconcile_path(opt, "hts-in_progress.lock")))
+      break;
+    if (fexist(reconcile_path(opt, "hts-cache/new.zip")) &&
+        fexist(reconcile_path(opt, "hts-cache/old.zip")) &&
+        fsize(reconcile_path(opt, "hts-cache/new.zip")) <
+            CACHE_RECONCILE_NEW_TINY &&
+        fsize(reconcile_path(opt, "hts-cache/old.zip")) >
+            CACHE_RECONCILE_OLD_SOLID &&
+        fsize(reconcile_path(opt, "hts-cache/old.zip")) >
+            fsize(reconcile_path(opt, "hts-cache/new.zip")))
+      reconcile_promote(opt, "hts-cache/old.zip", "hts-cache/new.zip");
+    if (fexist(reconcile_path(opt, "hts-cache/new.dat")) &&
+        fexist(reconcile_path(opt, "hts-cache/old.dat")) &&
+        fexist(reconcile_path(opt, "hts-cache/old.ndx")) &&
+        fsize(reconcile_path(opt, "hts-cache/new.dat")) <
+            CACHE_RECONCILE_NEW_TINY &&
+        fsize(reconcile_path(opt, "hts-cache/old.dat")) >
+            CACHE_RECONCILE_OLD_SOLID &&
+        fsize(reconcile_path(opt, "hts-cache/old.dat")) >
+            fsize(reconcile_path(opt, "hts-cache/new.dat"))) {
+      reconcile_promote(opt, "hts-cache/old.dat", "hts-cache/new.dat");
+      reconcile_promote(opt, "hts-cache/old.ndx", "hts-cache/new.ndx");
+    }
+    break;
+  case CACHE_RECONCILE_ROLLBACK:
+    /* Nothing transferred: restore the previous generation and sidecars. */
+    reconcile_promote(opt, "hts-cache/old.zip", "hts-cache/new.zip");
+    if (fexist(reconcile_path(opt, "hts-cache/old.dat")) &&
+        fexist(reconcile_path(opt, "hts-cache/old.ndx"))) {
+      reconcile_promote(opt, "hts-cache/old.dat", "hts-cache/new.dat");
+      reconcile_promote(opt, "hts-cache/old.ndx", "hts-cache/new.ndx");
+    }
+    reconcile_promote(opt, "hts-cache/old.lst", "hts-cache/new.lst");
+    reconcile_promote(opt, "hts-cache/old.txt", "hts-cache/new.txt");
+    break;
+  }
+}
+
 // renvoyer uniquement en tête, ou NULL si erreur
 // return NULL upon error, and set -1 to r.statuscode
 htsblk *cache_header(httrackp * opt, cache_back * cache, const char *adr,
@@ -1424,25 +1558,10 @@ void cache_init(cache_back * cache, httrackp * opt) {
       mkdir(fconcat(OPT_GET_BUFF(opt), OPT_GET_BUFF_SIZE(opt), StringBuff(opt->path_log), "hts-cache"),
             HTS_PROTECT_FOLDER);
 #endif
-      if ((fexist(fconcat(OPT_GET_BUFF(opt), OPT_GET_BUFF_SIZE(opt), StringBuff(opt->path_log), "hts-cache/new.zip")))) {       // il existe déja un cache précédent.. renommer
-        /* Previous cache from the previous cache version */
-#if 0
-        /* No.. reuse with old httrack releases! */
-        if (fexist
-            (fconcat
-             (OPT_GET_BUFF(opt), OPT_GET_BUFF_SIZE(opt), StringBuff(opt->path_log),
-              "hts-cache/old.dat")))
-          remove(fconcat
-                 (OPT_GET_BUFF(opt), OPT_GET_BUFF_SIZE(opt), StringBuff(opt->path_log),
-                  "hts-cache/old.dat"));
-        if (fexist
-            (fconcat
-             (OPT_GET_BUFF(opt), OPT_GET_BUFF_SIZE(opt), StringBuff(opt->path_log),
-              "hts-cache/old.ndx")))
-          remove(fconcat
-                 (OPT_GET_BUFF(opt), OPT_GET_BUFF_SIZE(opt), StringBuff(opt->path_log),
-                  "hts-cache/old.ndx"));
-#endif
+      if ((fexist(fconcat(
+              OPT_GET_BUFF(opt), OPT_GET_BUFF_SIZE(opt),
+              StringBuff(opt->path_log),
+              "hts-cache/new.zip")))) { // a previous cache exists.. rename it
         /* Previous cache version */
         if ((fexist(fconcat(OPT_GET_BUFF(opt), OPT_GET_BUFF_SIZE(opt), StringBuff(opt->path_log), "hts-cache/new.dat"))) && (fexist(fconcat(OPT_GET_BUFF(opt), OPT_GET_BUFF_SIZE(opt), StringBuff(opt->path_log), "hts-cache/new.ndx")))) {     // il existe déja un cache précédent.. renommer
           rename(fconcat
@@ -1483,7 +1602,13 @@ void cache_init(cache_back * cache, httrackp * opt) {
         } else {
           hts_log_print(opt, LOG_DEBUG, "Cache: successfully renamed");
         }
-      } else if ((fexist(fconcat(OPT_GET_BUFF(opt), OPT_GET_BUFF_SIZE(opt), StringBuff(opt->path_log), "hts-cache/new.dat"))) && (fexist(fconcat(OPT_GET_BUFF(opt), OPT_GET_BUFF_SIZE(opt), StringBuff(opt->path_log), "hts-cache/new.ndx")))) {        // il existe déja un cache précédent.. renommer
+      } else if ((fexist(fconcat(OPT_GET_BUFF(opt), OPT_GET_BUFF_SIZE(opt),
+                                 StringBuff(opt->path_log),
+                                 "hts-cache/new.dat"))) &&
+                 (fexist(fconcat(OPT_GET_BUFF(opt), OPT_GET_BUFF_SIZE(opt),
+                                 StringBuff(opt->path_log),
+                                 "hts-cache/new.ndx")))) { // a previous cache
+                                                           // exists.. rename it
 #if DEBUGCA
         printf("work with former cache\n");
 #endif
@@ -1512,7 +1637,7 @@ void cache_init(cache_back * cache, httrackp * opt) {
                 "hts-cache/new.ndx"), fconcat(OPT_GET_BUFF(opt), OPT_GET_BUFF_SIZE(opt),
                                               StringBuff(opt->path_log),
                                               "hts-cache/old.ndx"));
-      } else {                  // un des deux (ou les deux) fichiers cache absents: effacer l'autre éventuel
+      } else { // one or both cache files missing: remove the remaining one
 #if DEBUGCA
         printf("new cache\n");
 #endif
@@ -1881,12 +2006,6 @@ void cache_init(cache_back * cache, httrackp * opt) {
                    "hts-cache/new.lst"), "wb");
           strcpybuff(opt->state.strc.path, StringBuff(opt->path_html));
           opt->state.strc.lst = cache->lst;
-          //{
-          //filecreate_params tmp;
-          //strcpybuff(tmp.path,StringBuff(opt->path_html));    // chemin
-          //tmp.lst=cache->lst;                 // fichier lst
-          //filenote("",&tmp);        // initialiser filecreate
-          //}
 
           // supprimer old.txt
           if (fexist
@@ -1975,12 +2094,6 @@ void cache_init(cache_back * cache, httrackp * opt) {
                    "hts-cache/new.lst"), "wb");
           strcpybuff(opt->state.strc.path, StringBuff(opt->path_html));
           opt->state.strc.lst = cache->lst;
-          //{
-          //  filecreate_params tmp;
-          //  strcpybuff(tmp.path,StringBuff(opt->path_html));    // chemin
-          //  tmp.lst=cache->lst;                 // fichier lst
-          //  filenote("",&tmp);        // initialiser filecreate
-          //}
 
           // supprimer old.txt
           if (fexist
@@ -2012,8 +2125,6 @@ void cache_init(cache_back * cache, httrackp * opt) {
                     "statuscode\tstatus ('servermsg')\tMIME\tEtag|Date\tURL\tlocalfile\t(from URL)"
                     LF);
           }
-          // test
-          // cache_writedata(cache->ndx,cache->dat,"//[TEST]//","test1","TEST PIPO",9);
         }                       // cache->ndx!=NULL
       }                         //cache->zipOutput != NULL
 

src/htscache.h

@@ -66,8 +66,11 @@ htsblk cache_read(httrackp * opt, cache_back * cache, const char *adr,
                   const char *fil, const char *save, char *location);
 htsblk cache_read_ro(httrackp * opt, cache_back * cache, const char *adr,
                      const char *fil, const char *save, char *location);
-htsblk cache_read_including_broken(httrackp * opt, cache_back * cache,
-                                   const char *adr, const char *fil);
+/* Like cache_read, but also yields entries whose transfer broke; return_save
+   (optional, HTS_URLMAXSIZE*2) receives the entry's recorded save name. */
+htsblk cache_read_including_broken(httrackp *opt, cache_back *cache,
+                                   const char *adr, const char *fil,
+                                   char *return_save);
 htsblk cache_readex(httrackp * opt, cache_back * cache, const char *adr,
                     const char *fil, const char *save, char *location,
                     char *return_save, int readonly);
@@ -75,6 +78,17 @@ htsblk *cache_header(httrackp * opt, cache_back * cache, const char *adr,
                      const char *fil, htsblk * r);
 void cache_init(cache_back * cache, httrackp * opt);
 
+/* Which hts-cache/ generation (new.* vs old.*) is authoritative. */
+typedef enum {
+  CACHE_RECONCILE_PROMOTE,     /* no new cache: promote the old generation */
+  CACHE_RECONCILE_INTERRUPTED, /* aborted run: keep the larger generation */
+  CACHE_RECONCILE_ROLLBACK     /* nothing transferred: restore the old one */
+} hts_cache_reconcile_mode;
+
+/* Reconcile the on-disk cache generations according to mode; a no-op when
+   the involved files are absent. */
+void hts_cache_reconcile(httrackp *opt, hts_cache_reconcile_mode mode);
+
 int cache_writedata(FILE * cache_ndx, FILE * cache_dat, const char *str1,
                     const char *str2, char *outbuff, int len);
 int cache_readdata(cache_back * cache, const char *str1, const char *str2,

src/htscache_selftest.h

@@ -44,6 +44,27 @@ typedef struct httrackp httrackp;
    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);
+
+/* Cache write-failure policy (#174/#219): abort on fatal errno or a streak,
+   drop just the entry otherwise. Returns the failed-check count. */
+int cache_write_failure_selftest(httrackp *opt, const char *dir);
+
+/* Exercise the hts_cache_reconcile() generation policies on file fixtures
+   under <dir>. Returns the failed-check count. */
+int cache_reconcile_selftest(httrackp *opt, const char *dir);
+
+/* Inject read-side corruption (zip byte surgery: bad size, header, deflate)
+   under <dir> and assert every case degrades to STATUSCODE_INVALID without
+   tainting a sibling entry. */
+int cache_corruption_selftest(httrackp *opt, const char *dir);
+
 #endif
 
 #endif

src/htscatchurl.c

@@ -64,7 +64,7 @@ Please visit our Website: http://www.httrack.com
 // catch_url_init(&port,&return_host);
 HTSEXT_API T_SOC catch_url_init_std(int *port_prox, char *adr_prox) {
   T_SOC soc;
-  int try_to_listen_to[] = { 8080, 3128, 80, 81, 82, 8081, 3129, 31337, 0, -1 };
+  int try_to_listen_to[] = {8080, 3128, 80, 81, 82, 8081, 3129, 0, -1};
   int i = 0;
 
   do {
@@ -135,7 +135,8 @@ HTSEXT_API T_SOC catch_url_init(int *port, /* 128 bytes */ char *adr) {
 // returns 0 if error
 // url: buffer where URL must be stored - or ip:port in case of failure
 // data: 32Kb
-HTSEXT_API int catch_url(T_SOC soc, char *url, char *method, char *data) {
+HTSEXT_API hts_boolean catch_url(T_SOC soc, char *url, char *method,
+                                 char *data) {
   int retour = 0;
 
   // connexion (accept)
@@ -174,7 +175,9 @@ HTSEXT_API int catch_url(T_SOC soc, char *url, char *method, char *data) {
       //
       socinput(soc, line, 1000);
       if (strnotempty(line)) {
-        if (sscanf(line, "%s %s %s", method, url, protocol) == 3) {
+        /* widths bound the caller buffers: method[32], url[HTS_URLMAXSIZE*2],
+           protocol[256] */
+        if (sscanf(line, "%31s %2047s %255s", method, url, protocol) == 3) {
           lien_adrfil af;
 
           // méthode en majuscule
@@ -194,7 +197,6 @@ HTSEXT_API int catch_url(T_SOC soc, char *url, char *method, char *data) {
             htsblk blkretour;
 
             hts_init_htsblk(&blkretour);
-            //memset(&blkretour, 0, sizeof(htsblk));    // effacer
             blkretour.location = loc;   // si non nul, contiendra l'adresse véritable en cas de moved xx
             // Lire en têtes restants
             sprintf(data, "%s %s %s\r\n", method, af.fil, protocol);
@@ -204,8 +206,8 @@ HTSEXT_API int catch_url(T_SOC soc, char *url, char *method, char *data) {
               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");
+            // CR/LF final de l'en tête inutile car déja placé via la ligne vide
+            // juste au dessus
             if (blkretour.totalsize > 0) {
               int len = (int) min(blkretour.totalsize, 32000);
               int pos = (int) strlen(data);

src/htscharset.c

@@ -841,71 +841,6 @@ static unsigned int nlz8(unsigned char x) {
     }                                           \
   } while(0)
 
-/* Sample. */
-#if 0
-
-int main(int argc, char **argv) {
-  int i;
-  int hex = 0;
-  
-#define READ_INT(DEST)                                  \
-  ( ( !hex && sscanf(argv[i], "%d", &(DEST)) == 1)      \
-    || (hex && sscanf(argv[i], "%x", &(DEST)) == 1 ) )
-  
-  for(i = 1 ; i < argc ; i++) {
-    unsigned int uc, from, to;
-    
-    if (strcmp(argv[i], "--hex") == 0) {
-      hex = 1;
-    }
-    else if (strcmp(argv[i], "--decimal") == 0) {
-      hex = 0;
-    }
-    else if (strcmp(argv[i], "--decode") == 0) {
-#define RD fgetc_unlocked(stdin)
-#define WR(C) do {                              \
-        if (C != -1) {                          \
-          printf("%04x\n", C);                  \
-        } else if (!feof(stdin)) {              \
-          fprintf(stderr, "read error\n");      \
-          exit(EXIT_FAILURE);                   \
-        }                                       \
-      } while(0)
-      while(!feof(stdin)) {
-        READ_UNICODE(RD, WR);
-      }
-#undef RD
-#undef WR
-    }
-    else if (strcmp(argv[i], "-range") == 0
-             && i + 2 < argc
-             && (++i, 1)
-             && READ_INT(from)
-             && (++i, 1)
-             && READ_INT(to)
-             ) {
-      unsigned int i;
-      for(i = from ; i < to ; i++) {
-#define EM(C) fputc_unlocked(C, stdout)
-        EMIT_UNICODE(i, EM);
-#undef EM
-      }
-    }
-    else if (READ_INT(uc)) {
-#define EM(C) fputc_unlocked(C, stdout)
-      EMIT_UNICODE(uc, EM);
-#undef EM
-    }
-    else {
-      return EXIT_FAILURE;
-    }
-  }
-  
-  return EXIT_SUCCESS;
-}
-
-#endif
-
 /* IDNA helpers. */
 #undef ADD_BYTE
 #undef INCREASE_CAPA
@@ -975,19 +910,19 @@ char *hts_convertStringUTF8ToIDNA(const char *s, size_t size) {
                 /* Reader: can read bytes up to j */
 #define RD ( utfSeq < j ? segData[utfSeq++] : -1 )
 
-                /* Writer: upon error, return FFFD (replacement character) */
-#define WR(C) do { \
-  if ((C) != -1) { \
-    /* copy character */ \
-    assertf(segOutputSize < segSize); \
-    segInt[segOutputSize++] = (C); \
-  } \
-  /* In case of error, abort. */ \
-  else { \
-    FREE_BUFFER(); \
-    return NULL; \
-  } \
-} while(0)
+                /* Writer: a malformed sequence abandons the encode (NULL) */
+#define WR(C)                                                                  \
+  do {                                                                         \
+    if ((C) != -1) {                                                           \
+      /* copy character */                                                     \
+      assertf(segOutputSize < segSize);                                        \
+      segInt[segOutputSize++] = (C);                                           \
+    } else {                                                                   \
+      freet(segInt);                                                           \
+      FREE_BUFFER();                                                           \
+      return NULL;                                                             \
+    }                                                                          \
+  } while (0)
 
                 /* Read/Write Unicode character. */
                 READ_UNICODE(RD, WR);
@@ -1209,7 +1144,7 @@ int hts_isStringUTF8(const char *s, size_t size) {
     /* Reader: can read bytes up to j */
 #define RD ( i < size ? data[i++] : -1 )
 
-    /* Writer: upon error, return FFFD (replacement character) */
+    /* Writer: a malformed sequence means the string is not UTF-8 (return 0) */
 #define WR(C) if ((C) == -1) { return 0; }
 
     /* Read Unicode character. */

src/htsconfig.h

@@ -52,12 +52,8 @@ Please visit our Website: http://www.httrack.com
 #define DEFAULT_FTP "index.txt"
 
 // extension par défaut pour fichiers n'en ayant pas
-#define DEFAULT_EXT       ".html"
+#define DEFAULT_EXT ".html"
 #define DEFAULT_EXT_SHORT ".htm"
-//#define DEFAULT_BIN_EXT   ".bin"
-//#define DEFAULT_BIN_EXT_SHORT ".bin"
-//#define DEFAULT_EXT       ".txt"
-//#define DEFAULT_EXT_SHORT ".txt"
 
 // éviter les /nul, /con..
 #define HTS_OVERRIDE_DOS_FOLDERS 1
@@ -80,14 +76,11 @@ Please visit our Website: http://www.httrack.com
 // always direct-to-disk (0/1)
 #define HTS_DIRECTDISK_ALWAYS 1
 
-// gérer une table de hachage?
-// REMOVED
-// #define HTS_HASH 1
-
 // fast cache (build hash table)
 #define HTS_FAST_CACHE 1
 
-// le > peut être considéré comme un tag de fermeture de commentaire (<!-- > est valide)
+// le > peut être considéré comme un tag de fermeture de commentaire (<!-- > est
+// valide)
 #define GT_ENDS_COMMENT 1
 
 // always adds a '/' at the end if a '~' is encountered (/~smith -> /~smith/)
@@ -96,26 +89,10 @@ Please visit our Website: http://www.httrack.com
 // always transform a '//' into a sigle '/'
 #define HTS_STRIP_DOUBLE_SLASH 0
 
-// case-sensitive pour les dossiers et fichiers (0/1)
-// [normalement 1, mais pose des problèmes (url malformée par exemple) et n'est pas très utile..
-// ..et pas bcp respecté]
-// REMOVED
-// #define HTS_CASSE 0
-
-// Un fichier ayant une taille différente du content-length doit il être annulé?
-// SEE opt.tolerant and opt.http10
-// #define HTS_CL_IS_FATAL 0
-
 // une erreur supprime le fichier sur disque
 // (non fixé pour cause de retry)
 #define HTS_REMOVE_BAD_FILES 0
 
-// en cas de Range: xx- donnant un Content-length: xx
-// alors skipper le fichier, considéré comme transmis
-// #define HTS_SKIP_FULL_RANGE 1
-
-// nombre max de filtres que l'utilisateur peut fixer
-// #define HTS_FILTERSMAX 10000
 #define HTS_FILTERSINC 1000
 
 // connect non bloquant? (poll sur write)

src/htscore.h

@@ -30,7 +30,9 @@ Please visit our Website: http://www.httrack.com
 /* Author: Xavier Roche                                         */
 /* ------------------------------------------------------------ */
 
-// Fichier librairie .h
+/* Core engine declarations. Not an installed header, but part of the de-facto
+   API surface: external consumers (e.g. httrack-android) read these structs and
+   constants and call functions declared here. */
 #ifndef HTS_CORE_DEFH
 #define HTS_CORE_DEFH
 
@@ -38,7 +40,7 @@ Please visit our Website: http://www.httrack.com
 
 /* specific definitions */
 #include "htsbase.h"
-// Includes & définitions
+/* Includes and definitions */
 #include <sys/types.h>
 #include <sys/stat.h>
 #ifdef _WIN32
@@ -83,45 +85,45 @@ typedef struct filecreate_params filecreate_params;
 // options
 #include "htsopt.h"
 
-// INCLUDES .H PARTIES DE CODE HTTRACK
+// HTTrack engine sub-headers
 
-// routine main
+// main entry point
 #include "htscoremain.h"
 
 // core routines
 #include "htscore.h"
 
-// divers outils pour httrack.c
+// misc tools for httrack.c
 #include "htstools.h"
 
-// aide pour la version en ligne de commande
+// command-line help
 #include "htshelp.h"
 
-// génération du nom de fichier à sauver
+// build the on-disk save filename
 #include "htsname.h"
 
-// gestion ftp
+// FTP support
 #include "htsftp.h"
 
-// gestion interception d'URL
+// URL interception
 #include "htscatchurl.h"
 
-// gestion robots.txt
+// robots.txt handling
 #include "htsrobots.h"
 
-// routines d'acceptation de liens
+// link-acceptance rules
 #include "htswizard.h"
 
-// routines de regexp
+// regexp/filter routines
 #include "htsfilters.h"
 
-// gestion backing
+// download backing (the back[] slot ring)
 #include "htsback.h"
 
-// gestion cache
+// cache handling
 #include "htscache.h"
 
-// gestion hashage
+// hashing
 #include "htshash.h"
 #include "coucal.h"
 
@@ -129,87 +131,116 @@ typedef struct filecreate_params filecreate_params;
 
 #include "hts-indextmpl.h"
 
-// adr, fil
+/** A remote URL split into host and path, each a fixed inline buffer
+    (HTS_URLMAXSIZE*2 bytes, NUL-terminated). */
 #ifndef HTS_DEF_FWSTRUCT_lien_adrfil
 #define HTS_DEF_FWSTRUCT_lien_adrfil
 typedef struct lien_adrfil lien_adrfil;
 #endif
 struct lien_adrfil {
-  char adr[HTS_URLMAXSIZE * 2];      // adresse
-  char fil[HTS_URLMAXSIZE * 2];      // nom du fichier distant
+  char adr[HTS_URLMAXSIZE * 2]; /**< host (address) */
+  char fil[HTS_URLMAXSIZE * 2]; /**< remote file path */
 };
 
-// adr, fil, save
+/** A remote URL plus the local on-disk path it is saved to. */
 #ifndef HTS_DEF_FWSTRUCT_lien_adrfilsave
 #define HTS_DEF_FWSTRUCT_lien_adrfilsave
 typedef struct lien_adrfilsave lien_adrfilsave;
 #endif
 struct lien_adrfilsave {
   lien_adrfil af;
-  char save[HTS_URLMAXSIZE * 2];     // nom à sauver sur disque (avec chemin éventuel)
+  char save[HTS_URLMAXSIZE * 2]; /**< local save path (with directory) */
 };
 
+/** Per-slot connect-fallback bookkeeping (parallel to struct_back.lnk).
+    Tracks which resolved address the slot is currently connecting to so a
+    stuck connect can be retried against the next one. */
+typedef struct hts_connect_fallback {
+  int addr_index;       /**< candidate being connected (0-based) */
+  int addr_count;       /**< resolved addresses; -1 = not yet probed */
+  TStamp connect_start; /**< when the current candidate's connect began */
+} hts_connect_fallback;
+
+/** The download-slot ring: the set of concurrent transfers in flight.
+    Allocated/owned by the engine; consumers (status callbacks, the loop)
+    read it but do not resize or free it. */
 #ifndef HTS_DEF_FWSTRUCT_struct_back
 #define HTS_DEF_FWSTRUCT_struct_back
 typedef struct struct_back struct_back;
 #endif
 struct struct_back {
-  lien_back *lnk;
-  int count;
-  coucal ready;
-  LLint ready_size_bytes;
+  lien_back *lnk;         /**< slot array, valid indices [0..count-1]
+                               (count+1 entries allocated); a slot is
+                               active iff lnk[i].status != STATUS_FREE.
+                               See struct lien_back in htsopt.h and the
+                               STATUS_* codes in htsbasenet.h. */
+  int count;              /**< number of usable slots (back_max) */
+  coucal ready;           /**< index of slots whose transfer completed */
+  LLint ready_size_bytes; /**< total bytes buffered in completed slots */
+  hts_connect_fallback *connect_fallback; /**< per-slot, count+1 entries */
 };
 
 typedef struct cache_back_zip_entry cache_back_zip_entry;
 
-// cache
+/** Open handle to the mirror cache (the read-from-old / write-to-new state
+    used to resume and to avoid re-fetching unchanged files). Engine-owned. */
 #ifndef HTS_DEF_FWSTRUCT_cache_back
 #define HTS_DEF_FWSTRUCT_cache_back
 typedef struct cache_back cache_back;
 #endif
 struct cache_back {
-  int version;                  // 0 ou 1
+  int version; /**< cache-file format version being read */
   /* */
   int type;
-  int ro;
-  FILE *dat, *ndx, *olddat;
-  char *use;                    // liste des adr+fil
-  FILE *lst;                    // liste des fichiers pour la "purge"
-  FILE *txt;                    // liste des fichiers (info)
+  int ro;                   /**< read-only: no new cache is written */
+  FILE *dat, *ndx, *olddat; /**< new data, new index, old data files */
+  char *use;                /**< in-memory list of cached adr+fil keys */
+  FILE *lst;                /**< file list, used for purge */
+  FILE *txt;                /**< human-readable file list (info) */
   char lastmodified[256];
   // HASH
   coucal hashtable;
   // HASH for tests (naming subsystem)
   coucal cached_tests;
-  // fichiers log optionnels
+  /* optional log files */
   FILE *log;
   FILE *errlog;
-  // variables
-  int ptr_ant;                  // pointeur pour anticiper
-  int ptr_last;                 // pointeur pour anticiper
-  //
+  /* read-ahead cursors into the old cache */
+  int ptr_ant;
+  int ptr_last;
+  /* ZIP-backed cache backend (newer format) */
   void *zipInput;
   void *zipOutput;
   cache_back_zip_entry *zipEntries;
   int zipEntriesOffs;
   int zipEntriesCapa;
+  hts_boolean
+      zipWriteFailed; /**< a cache write failed; stop touching the stream */
+  int zipWriteFailures; /**< consecutive entry write failures; reset on store */
 };
 
 #ifndef HTS_DEF_FWSTRUCT_hash_struct
 #define HTS_DEF_FWSTRUCT_hash_struct
 typedef struct hash_struct hash_struct;
 #endif
+/** Lookup indexes over the link heap: map save-name / URL back to a link, so a
+    URL seen twice resolves to one entry. The coucal tables index into liens;
+    they do not own the links. */
 struct hash_struct {
-  /* Links big array reference */
+  /* points at the engine's link array (opt->liens); not owned */
   const lien_url *const*const*liens;
-  /* Savename (case insensitive ; lowercased) */
+  /* save-name -> link index (case-insensitive: keys lowercased) */
   coucal sav;
-  /* Address and path */
+  /* address+path -> link index */
   coucal adrfil;
-  /* Former address and path */
+  /* former address+path -> link index (renamed/moved entries) */
   coucal former_adrfil;
-  /** Buffers **/
-  int normalized;
+  /* effective urlhack sub-flags: www.==host / // collapse / query-arg sort */
+  hts_boolean norm_host;
+  hts_boolean norm_slash;
+  hts_boolean norm_query;
+  /* query-strip keys (not owned); set from opt->strip_query at hash_init */
+  const char *strip_query;
   char normfil[HTS_URLMAXSIZE * 2];
   char normfil2[HTS_URLMAXSIZE * 2];
   char catbuff[CATBUFF_SIZE];
@@ -219,134 +250,243 @@ struct hash_struct {
 #define HTS_DEF_FWSTRUCT_filecreate_params
 typedef struct filecreate_params filecreate_params;
 #endif
+/** Parameters threaded through file-creation callbacks (filenote). */
 struct filecreate_params {
-  FILE *lst;
+  FILE *lst; /**< open file list to append created paths to */
   char path[HTS_URLMAXSIZE * 2];
 };
 
-/* Access macros. */
+/* Convenience accessors over the link heap; assume `opt` (and where used,
+   `ptr`/`parent_relative`) are in scope. heap(N) is the Nth link;
+   heap_top_index() is the last recorded link's index. */
 #define heap(N)            (opt->liens[N])
+
 #define heap_top_index()   (opt->lien_tot - 1)
+
 #define heap_top()         (heap(heap_top_index()))
+
 #define urladr()           (heap(ptr)->adr)
+
 #define urlfil()           (heap(ptr)->fil)
+
 #define savename()         (heap(ptr)->sav)
+
 #define parenturladr()     (heap(heap(ptr)->precedent)->adr)
+
 #define parenturlfil()     (heap(heap(ptr)->precedent)->fil)
+
 #define parentsavename()   (heap(heap(ptr)->precedent)->sav)
+
 #define relativeurladr()   ((!parent_relative)?urladr():parenturladr())
+
 #define relativeurlfil()   ((!parent_relative)?urlfil():parenturlfil())
+
 #define relativesavename() ((!parent_relative)?savename():parentsavename())
 
-/* Library internal definictions */
+/* Library-internal helpers (engine-only, HTS_INTERNAL_BYTECODE). */
 #ifdef HTS_INTERNAL_BYTECODE
 
+/* True if a new cache is being written (plain or zip backend). */
 HTS_STATIC int cache_writable(cache_back * cache) {
   return (cache != NULL && (cache->dat != NULL || cache->zipOutput != NULL));
 }
 
+/* True if an old cache is available to read (plain or zip backend). */
 HTS_STATIC int cache_readable(cache_back * cache) {
   return (cache != NULL && (cache->olddat != NULL || cache->zipInput != NULL));
 }
 
 #endif
 
-// Fonctions
+// Functions
 
-// INCLUDES .H PARTIES DE CODE HTTRACK
-
-/* Library internal definictions */
+/* Library-internal only (engine TUs). */
 #ifdef HTS_INTERNAL_BYTECODE
 
 char *hts_cancel_file_pop(httrackp * opt);
 
 #endif
 
-// add a link on the heap
+/* Record a link on the heap. All strings are copied (caller keeps ownership).
+   Returns 1 on success, 0 if the link limit (opt->maxlink) is reached. */
 int hts_record_link(httrackp * opt,
                     const char *address, const char *file, const char *save,
                     const char *ref_address, const char *ref_file,
                     const char *codebase);
 
-// index of the latest added link
+/* Index of the most recently recorded link. */
 size_t hts_record_link_latest(httrackp *opt);
 
-// invalidate an entry
+/* Mark link at index lpos as not to be processed (sets pass2 = -1). */
 void hts_invalidate_link(httrackp * opt, int lpos);
 
-// wipe all records
+/* Reset / free the engine's link heap. */
 void hts_record_init(httrackp *opt);
+
 void hts_record_free(httrackp *opt);
 
-//int httpmirror(char* url,int level,httrackp opt);
+/* Run the mirror for the given start URL(s) under opt. Top-level engine entry.
+ */
 int httpmirror(char *url1, httrackp * opt);
+
+/* Write len bytes of adr to local path s. url_adr/url_fil (may be NULL) name
+   the source URL for logging/notification. */
 int filesave(httrackp * opt, const char *adr, int len, const char *s,
              const char *url_adr /* = NULL */ ,
              const char *url_fil /* = NULL */ );
+
 char *hts_cancel_file_pop(httrackp * opt);
+
 int check_fatal_io_errno(void);
+
 int engine_stats(void);
+
 void host_ban(httrackp * opt, int ptr, struct_back * sback, const char *host);
+
+/* Open local file s for writing (filecreate, truncate) or appending
+   (fileappend), creating parent directories as needed. Return an open FILE*
+   the caller must fclose(), or NULL on failure. */
 FILE *filecreate(filenote_strc * strct, const char *s);
+
 FILE *fileappend(filenote_strc * strct, const char *s);
+
+/* Create an empty file, return 1 on success, 0 on failure. */
 int filecreateempty(filenote_strc * strct, const char *filename);
+
 int filenote(filenote_strc * strct, const char *s, filecreate_params * params);
+
 void file_notify(httrackp * opt, const char *adr, const char *fil,
                  const char *save, int create, int modify, int wasupdated);
+
 void usercommand(httrackp * opt, int exe, const char *cmd, const char *file,
                  const char *adr, const char *fil);
+
 void usercommand_exe(const char *cmd, const char *file);
+
+// Finish the makeindex index.html (footer + refresh meta), run usercommand.
+// Updates *makeindex_done/*makeindex_fp in place; adr/fil are the mode strings.
+void hts_finish_makeindex(httrackp *opt, int *makeindex_done,
+                          FILE **makeindex_fp, int makeindex_links,
+                          const char *makeindex_firstlink,
+                          const char *template_footer, const char *adr,
+                          const char *fil);
+
+// Flush ht_buff[0..ht_len] to save on disk (skip if MD5 unchanged); *fp
+// closed+NULLed on write. Precondition: ht_len>0.
+void hts_finish_html_file(httrackp *opt, cache_back *cache, htsblk *r,
+                          FILE **fp, const char *ht_buff, size_t ht_len,
+                          const char *adr, const char *fil, const char *save);
+
 int filters_init(char ***ptrfilters, int maxfilter, int filterinc);
 
 int fspc(httrackp * opt, FILE * fp, const char *type);
+
 char *next_token(char *p, int flag);
 
-//
+/* Like fil_normalized(), but first drops query keys in STRIP (comma-separated,
+   "*" = all); STRIP NULL/empty behaves exactly like fil_normalized(). */
+char *fil_normalized_filtered(const char *source, char *dest,
+                              const char *strip);
+
+/* As fil_normalized_filtered(), but DO_SLASH/DO_QUERY gate the // collapse and
+   the query-argument sort independently (the urlhack sub-flags). */
+char *fil_normalized_filtered_ex(const char *source, char *dest,
+                                 const char *strip, int do_slash, int do_query);
+
+/* For URL ADR/FIL, return (in DEST) the comma keylist to strip from the
+   '\n'-separated "[pattern=]keys" RULES (patterns matched on host/path via
+   strjoker, last wins); NULL if none match. Feeds fil_normalized_filtered(). */
+const char *hts_query_strip_keys(const char *rules, const char *adr,
+                                 const char *fil, char *dest, size_t destsize);
+
+/* Read a whole file into a freshly malloc'd, NUL-terminated buffer; the caller
+   owns it and must release it with freet(). Return NULL on missing/unreadable
+   file (readfile_or substitutes defaultdata instead). The byte content is NOT
+   transcoded except readfile_utf8, which expects a UTF-8 path. readfile2
+   reports the byte size (excluding the NUL) via *size when non-NULL. */
 char *readfile(const char *fil);
+
 char *readfile2(const char *fil, LLint * size);
+
 char *readfile_utf8(const char *fil);
+
 char *readfile_or(const char *fil, const char *defaultdata);
 
-#if 0
-void check_rate(TStamp stat_timestart, int maxrate);
-#endif
+/* Backing (download-slot) scheduler. Operate on the back[] ring (struct_back).
+   Not thread-safe; call from the single crawl loop. */
 
-// liens
-int liens_record(char *adr, char *fil, char *save, char *former_adr,
-                 char *former_fil, char *codebase);
+/* True if a connecting slot should give up on the current address and try the
+   next one: a fallback address remains (addr_index+1 < addr_count) and the
+   candidate has been connecting for at least its deadline, min(timeout, an
+   internal cap). elapsed/timeout in seconds. Exposed for the -#D self-test. */
+int back_connect_fallback_due(int addr_index, int addr_count, int elapsed,
+                              int timeout);
 
-// backing, routines externes
+/* How many new sockets may be opened now, honoring maxsoc and the maxconn rate
+   limit (>=0). _strict ignores reserved-slot headroom; the plain form leaves
+   room for naming tests and stops at 0 when the stack is nearly full. */
 int back_pluggable_sockets(struct_back * sback, httrackp * opt);
+
 int back_pluggable_sockets_strict(struct_back * sback, httrackp * opt);
+
+/* One engine-loop tick: refresh the transfer stats and run the loop callback
+   for slot b (-1 = none). HTS_FALSE = the callback requested an abort. */
+hts_boolean hts_loop_tick(struct_back *sback, httrackp *opt, int b, int ptr);
+
+/* Wait until a test socket can be plugged, pumping transfers, stats and the
+   loop callback; gives up past the -E deadline. HTS_FALSE = callback abort. */
+hts_boolean hts_wait_available_socket(struct_back *sback, httrackp *opt,
+                                      cache_back *cache, int ptr);
+
+/* Randomized inter-file pause target in [min_ms,max_ms] (#185), derived from a
+   timestamp seed so it is stable within one gap and rerolls per launch. */
+int hts_pause_target_ms(TStamp seed, int min_ms, int max_ms);
+
+/* Schedule more links from the heap into free slots. Returns the number queued,
+   or <=0 if none could be added (no free slot / paused / stopped). */
 int back_fill(struct_back * sback, httrackp * opt, cache_back * cache,
               int ptr, int numero_passe);
-int backlinks_done(const struct_back * sback, lien_url ** liens, 
-                   int lien_tot, int ptr);
+
+/* Count of links already finished (in background or served from cache). */
+int backlinks_done(const struct_back *sback, lien_url **liens, int lien_tot,
+                   int ptr);
+
+/* Like back_fill, but a no-op (returns -1) when in-memory buffered data already
+   exceeds opt->maxcache. */
 int back_fillmax(struct_back * sback, httrackp * opt, cache_back * cache,
                  int ptr, int numero_passe);
 
+/* Interactive prompt: continue an interrupted mirror? Returns nonzero to go on.
+ */
 int ask_continue(httrackp * opt);
-int nombre_digit(int n);
 
-// Java
-#if 0
-int hts_add_file(char *file, int file_position);
-#endif
+/* Number of decimal digits in n. */
+int nombre_digit(int n);
 
 // Polling
 #if HTS_POLL
 int check_flot(T_SOC s);
+
 int check_stdin(void);
+
 int read_stdin(char *s, int max);
 #endif
+/* Socket readiness probes: nonzero if the socket has an error / has data. */
 int check_sockerror(T_SOC s);
+
 int check_sockdata(T_SOC s);
 
-/* external modules */
+/* external modules: register a link discovered by a parser plugin. */
 int htsAddLink(htsmoduleStruct * str, char *link);
 
-// Void
+/* No-op function (used as a do-nothing callback / to defeat optimizers). */
 void voidf(void);
+
+/* HTML marker comment marking where the top index is spliced. */
 #define HTS_TOPINDEX "TOP_INDEX_HTTRACK"
 
+/* Worst-case byte expansion HT_ADD_HTMLESCAPED* must reserve per escaper. */
+#define HTS_HTMLESCAPE_MAXEXP 5      /* escape_for_html_print: '&'->"&amp;" */
+#define HTS_HTMLESCAPE_FULL_MAXEXP 6 /* _full: high byte->"&#xHH;" */
+
 #endif