mirror of
https://github.com/wolfcw/libfaketime.git
synced 2026-05-17 08:36:28 +03:00
0a1c887a8a
- Changed interception of internal syscalls on OSX and malloc arena treatment - Adapted the faketime wrapper shell script to set the appropriate environment variables on OSX and use gdate instead of date - Added README.OSX to explain the OSX-specific aspects of compiling and using libfaketime
115 lines
3.4 KiB
Bash
Executable File
115 lines
3.4 KiB
Bash
Executable File
#!/bin/sh
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# Simple wrapper shell script for FTPL (faketime preload library)
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# Thanks to Daniel Kahn Gillmor for improvement suggestions.
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# It allows you to modify the date and time a program sees when using
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# system library calls such as time() and fstat().
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# This wrapper exposes only a small subset of the FTPL functionality.
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# Please see FTPL's README file for more details
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# Acknowledgment: Parts of the functionality of this wrapper have been
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# inspired by Matthias Urlichs' datefudge 1.14.
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# Configuration: Path where the libfaketime libraries can be found on Linux/UNIX.
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FTPL_PATH=/usr/lib/faketime
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# For Mac OS X users: Full path and name to libfaketime.dylib.1
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MAC_FTPL_PATH=./libfaketime.dylib.1
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offset="$1"
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DATE_CMD=date
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USEMT=0
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USEDIRECT=0
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if [ "$offset" = "-v" -o "$offset" = "--version" ] ; then
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echo ""
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echo "$0: Version 0.8"
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echo "For usage information please use '$0 --help'."
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echo ""
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exit 0
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fi
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if [ "$offset" = "-m" ] ; then USEMT=1; shift; offset="$1"; fi
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if [ "$offset" = "-f" ] ; then USEDIRECT=1; shift; offset="$1"; fi
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if [ "$offset" = "-m" ] ; then USEMT=1; shift; offset="$1"; fi
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if [ -z "$offset" -o "$offset" = "-h" -o "$offset" = "-?" -o "$offset" = "--help" ] ; then
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echo ""
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echo "Usage: $0 [switches] timestamp program arguments"
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echo ""
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echo "This will run the specified 'program' with the given 'arguments'."
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echo "The program will be tricked into seeing the given 'timestamp' as its starting date and time."
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echo "The clock will continue to run from this timestamp. Please see the manpage (man faketime)"
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echo "for advanced options, such as stopping the wall clock and make it run faster or slower."
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echo ""
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echo "The optional switches are:"
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echo " -m : Use the multi-threaded version of libfaketime"
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echo " -f : Use the advanced timestamp specification format (see manpage)"
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echo ""
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echo "Examples:"
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echo "$0 'last friday 5 pm' /bin/date"
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echo "$0 '2008-12-24 08:15:42' /bin/date"
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echo "$0 -f '+2,5y x10,0' /bin/bash -c 'date; while true; do echo \$SECONDS ; sleep 1 ; done'"
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echo "$0 -f '+2,5y x0,50' /bin/bash -c 'date; while true; do echo \$SECONDS ; sleep 1 ; done'"
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echo "(Please note that it depends on your locale settings whether . or , has to be used for fractions)"
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echo ""
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if [ -z "$offset" ] ; then
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exit 1;
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fi
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exit 0
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fi
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shift
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# Check whether we are on Mac OS X (Darwin)
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UNAME=$(uname)
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if [ "$UNAME" = "Darwin" ] ; then
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export DYLD_FORCE_FLAT_NAMESPACE=1
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export DYLD_INSERT_LIBRARIES=$MAC_FTPL_PATH
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DATE_CMD=gdate
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fi
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# Setting LD_PRELOAD ...
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if [ "$USEMT" -eq 0 ] ; then
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export LD_PRELOAD="${LD_PRELOAD}${LD_PRELOAD:+:}$FTPL_PATH/libfaketime.so.1"
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fi
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if [ "$USEMT" -eq 1 ] ; then
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export LD_PRELOAD="${LD_PRELOAD}${LD_PRELOAD:+:}$FTPL_PATH/libfaketimeMT.so.1"
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fi
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###
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# Setting FAKETIME ...
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if [ "$USEDIRECT" -eq 0 ] ; then
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seconds=$($DATE_CMD -d "$offset" '+%s')
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if [ $? -ne 0 ] ; then
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echo "Error: Timestamp to fake not recognized, please re-try with a different timestamp."
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exit 1
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fi
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offset=$(expr $seconds - $($DATE_CMD '+%s'))
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if [ $? -ne 0 ] ; then
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echo "Error: Cannot calculate the faketime offset in seconds, please re-try with a different timestamp."
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exit 1
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fi
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FAKETIMEPREFIX=""
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if [ "$offset" -ge 0 ] ; then
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FAKETIMEPREFIX="+"
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fi
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export FAKETIME="$FAKETIMEPREFIX$offset"
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fi
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if [ "$USEDIRECT" -eq 1 ] ; then
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export FAKETIME="$offset"
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fi
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###
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# Executing the user-specified command ...
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exec "$@"
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