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#!/bin/bash # Copyright (C) 1998, 2002, 2006, 2007 Free Software Foundation # Copyright (C) 1993 Jean-loup Gailly # Modified for XZ Utils by Andrew Dudman and Lasse Collin. # 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 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. #SET_PATH - This line is a placeholder to ease patching this script. # Instead of unsetting XZ_OPT, just make sure that xz will use file format # autodetection. This way memory usage limit and thread limit can be # specified via XZ_OPT. With gzip, bzip2, and lzop it's OK to just unset the # environment variables. xz='xz --format=auto' unset GZIP BZIP BZIP2 LZOP case ${0##*/} in *cmp*) prog=xzcmp; cmp=${CMP:-cmp};; *) prog=xzdiff; cmp=${DIFF:-diff};; esac version="$prog (XZ Utils) 5.1.0alpha" usage="Usage: ${0##*/} [OPTION]... FILE1 [FILE2] Compare FILE1 to FILE2, using their uncompressed contents if they are compressed. If FILE2 is omitted, then the files compared are FILE1 and FILE1 from which the compression format suffix has been stripped. Do comparisons like '$cmp' does. OPTIONs are the same as for '$cmp'. Report bugs to <lasse.collin@tukaani.org>." # sed script to escape all ' for the shell, and then (to handle trailing # newlines correctly) turn trailing X on last line into '. escape=' s/'\''/'\''\\'\'''\''/g $s/X$/'\''/ ' while :; do case $1 in --h*) printf '%s\n' "$usage" || exit 2; exit;; --v*) echo "$version" || exit 2; exit;; --) shift; break;; -*\'*) cmp="$cmp '"`printf '%sX\n' "$1" | sed "$escape"`;; -?*) cmp="$cmp '$1'";; *) break;; esac shift done cmp="$cmp --" for file; do test "X$file" = X- || <"$file" || exit 2 done xz1=$xz xz2=$xz xz_status=0 exec 3>&1 if test $# -eq 1; then case $1 in *[-.]xz | *[-.]lzma | *.t[lx]z) ;; *[-.]bz2 | *.tbz | *.tbz2) xz1=bzip2;; *[-.][zZ] | *_z | *[-.]gz | *.t[ag]z) xz1=gzip;; *[-.]lzo | *.tzo) xz1=lzop;; *) echo >&2 "$0: $1: Unknown compressed file name suffix" exit 2;; esac case $1 in *[-.][zZ] | *_z | *[-.][gx]z | *[-.]bz2 | *[-.]lzma | *[-.]lzo) FILE=`expr "X$1" : 'X$.*$[-.][abglmoxzZ2]*$'`;; *.t[abglx]z) FILE=`expr "X$1" : 'X$.*[-.]t$[abglx]z$'`ar;; *.tbz2) FILE=`expr "X$1" : 'X$.*[-.]t$bz2$'`ar;; *.tzo) FILE=`expr "X$1" : 'X$.*[-.]t$zo$'`ar;; esac xz_status=$( exec 4>&1 ($xz1 -cd -- "$1" 4>&-; echo $? >&4) 3>&- | eval "$cmp" - '"$FILE"' >&3 ) elif test $# -eq 2; then case $1 in *[-.]bz2 | *.tbz | *.tbz2) xz1=bzip2;; *[-.][zZ] | *_z | *[-.]gz | *.t[ag]z) xz1=gzip;; *[-.]lzo | *.tzo) xz1=lzop;; esac case $2 in *[-.]bz2 | *.tbz | *.tbz2) xz2=bzip2;; *[-.][zZ] | *_z | *[-.]gz | *.t[ag]z) xz2=gzip;; *[-.]lzo | *.tzo) xz2=lzop;; esac case $1 in *[-.][zZ] | *_z | *[-.][gx]z | *[-.]bz2 | *[-.]lzma | *.t[abglx]z | *.tbz2 | *[-.]lzo | *.tzo | -) case "$2" in *[-.][zZ] | *_z | *[-.][gx]z | *[-.]bz2 | *[-.]lzma | *.t[abglx]z | *.tbz2 | *[-.]lzo | *.tzo | -) if test "$1$2" = --; then xz_status=$( exec 4>&1 ($xz1 -cdfq - 4>&-; echo $? >&4) 3>&- | eval "$cmp" - - >&3 ) elif # Reject Solaris 8's buggy /bin/bash 2.03. echo X | (echo X | eval "$cmp" /dev/fd/5 - >/dev/null 2>&1) 5<&0; then xz_status=$( exec 4>&1 ($xz1 -cdfq -- "$1" 4>&-; echo $? >&4) 3>&- | ( ($xz2 -cdfq -- "$2" 4>&-; echo $? >&4) 3>&- 5<&- </dev/null | eval "$cmp" /dev/fd/5 - >&3) 5<&0 ) cmp_status=$? case $xz_status in *[1-9]*) xz_status=1;; *) xz_status=0;; esac (exit $cmp_status) else F=`expr "/$2" : '.*/$.*$[-.][ablmotxz2]*$'` || F=$prog tmp= trap ' test -n "$tmp" && rm -f "$tmp" (exit 2); exit 2 ' HUP INT PIPE TERM 0 tmp=`mktemp -t -- "$F.XXXXXX"` || exit 2 $xz2 -cdfq -- "$2" > "$tmp" || exit 2 xz_status=$( exec 4>&1 ($xz1 -cdfq -- "$1" 4>&-; echo $? >&4) 3>&- | eval "$cmp" - '"$tmp"' >&3 ) cmp_status=$? rm -f "$tmp" || xz_status=$? trap - HUP INT PIPE TERM 0 (exit $cmp_status) fi;; *) xz_status=$( exec 4>&1 ($xz1 -cdfq -- "$1" 4>&-; echo $? >&4) 3>&- | eval "$cmp" - '"$2"' >&3 );; esac;; *) case "$2" in *[-.][zZ] | *_z | *[-.][gx]z | *[-.]bz2 | *[-.]lzma | *.t[abglx]z | *.tbz2 | *[-.]lzo | *.tzo | -) xz_status=$( exec 4>&1 ($xz2 -cdfq -- "$2" 4>&-; echo $? >&4) 3>&- | eval "$cmp" '"$1"' - >&3 );; *) eval "$cmp" '"$1"' '"$2"';; esac;; esac else echo >&2 "$0: Invalid number of operands; try \`${0##*/} --help' for help" exit 2 fi cmp_status=$? test "$xz_status" -eq 0 || exit 2 exit $cmp_status