3 # Copyright (C) 1998, 2002, 2006, 2007 Free Software Foundation
4 # Copyright (C) 1993 Jean-loup Gailly
6 # Modified for XZ Utils by Andrew Dudman and Lasse Collin.
8 # This program is free software; you can redistribute it and/or modify
9 # it under the terms of the GNU General Public License as published by
10 # the Free Software Foundation; either version 2 of the License, or
11 # (at your option) any later version.
13 # This program is distributed in the hope that it will be useful,
14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 # GNU General Public License for more details.
18 #SET_PATH - This line is a placeholder to ease patching this script.
20 # Instead of unsetting XZ_OPT, just make sure that xz will use file format
21 # autodetection. This way memory usage limit and thread limit can be
22 # specified via XZ_OPT. With gzip and bzip2 it's OK to just unset the
23 # environment variables.
24 xz='@xz@ --format=auto'
28 *cmp*) prog=xzcmp; cmp=${CMP:-cmp};;
29 *) prog=xzdiff; cmp=${DIFF:-diff};;
32 version="$prog (@PACKAGE_NAME@) @VERSION@"
34 usage="Usage: ${0##*/} [OPTION]... FILE1 [FILE2]
35 Compare FILE1 to FILE2, using their uncompressed contents if they are
36 compressed. If FILE2 is omitted, then the files compared are FILE1 and
37 FILE1 from which the compression format suffix has been stripped.
39 Do comparisons like '$cmp' does. OPTIONs are the same as for '$cmp'.
41 Report bugs to <@PACKAGE_BUGREPORT@>."
43 # sed script to escape all ' for the shell, and then (to handle trailing
44 # newlines correctly) turn trailing X on last line into '.
46 s/'\''/'\''\\'\'''\''/g
52 --h*) printf '%s\n' "$usage" || exit 2; exit;;
53 --v*) echo "$version" || exit 2; exit;;
55 -*\'*) cmp="$cmp '"`printf '%sX\n' "$1" | sed "$escape"`;;
56 -?*) cmp="$cmp '$1'";;
64 test "X$file" = X- || <"$file" || exit 2
72 if test $# -eq 1; then
74 *[-.]xz | *[-.]lzma | *.t[lx]z)
76 *[-.]bz2 | *.tbz | *.tbz2)
78 *[-.][zZ] | *_z | *[-.]gz | *.t[ag]z)
81 echo >&2 "$0: $1: Unknown compressed file name suffix"
85 *[-.][zZ] | *_z | *[-.][gx]z | *[-.]bz2 | *[-.]lzma)
86 FILE=`expr "X$1" : 'X\(.*\)[-.][abglmxzZ2]*$'`;;
88 FILE=`expr "X$1" : 'X\(.*[-.]t\)[abglx]z$'`ar;;
90 FILE=`expr "X$1" : 'X\(.*[-.]t\)bz2$'`ar;;
94 ($xz1 -cd -- "$1" 4>&-; echo $? >&4) 3>&- | eval "$cmp" - '"$FILE"' >&3
96 elif test $# -eq 2; then
98 *[-.]bz2 | *.tbz | *.tbz2) xz1=$bzip2;;
99 *[-.][zZ] | *_z | *[-.]gz | *.t[ag]z) xz1=$gzip;;
102 *[-.]bz2 | *.tbz | *.tbz2) xz2=$bzip2;;
103 *[-.][zZ] | *_z | *[-.]gz | *.t[ag]z) xz2=$gzip;;
106 *[-.][zZ] | *_z | *[-.][gx]z | *[-.]bz2 | *[-.]lzma | *.t[abglx]z | *.tbz2 | -)
108 *[-.][zZ] | *_z | *[-.][gx]z | *[-.]bz2 | *[-.]lzma | *.t[abglx]z | *.tbz2 | -)
109 if test "$1$2" = --; then
112 ($xz1 -cdfq - 4>&-; echo $? >&4) 3>&- |
115 elif # Reject Solaris 8's buggy /bin/bash 2.03.
116 echo X | (echo X | eval "$cmp" /dev/fd/5 - >/dev/null 2>&1) 5<&0; then
119 ($xz1 -cdfq -- "$1" 4>&-; echo $? >&4) 3>&- |
120 ( ($xz2 -cdfq -- "$2" 4>&-; echo $? >&4) 3>&- 5<&- </dev/null |
121 eval "$cmp" /dev/fd/5 - >&3) 5<&0
124 *[1-9]*) xz_status=1;;
128 F=`expr "/$2" : '.*/\(.*\)[-.][ablmtxz2]*$'` || F=$prog
131 test -n "$tmp" && rm -f "$tmp"
133 ' HUP INT PIPE TERM 0
134 tmp=`mktemp -t -- "$F.XXXXXX"` || exit 2
135 $xz2 -cdfq -- "$2" > "$tmp" || exit 2
138 ($xz1 -cdfq -- "$1" 4>&-; echo $? >&4) 3>&- |
139 eval "$cmp" - '"$tmp"' >&3
142 rm -f "$tmp" || xz_status=$?
143 trap - HUP INT PIPE TERM 0
149 ($xz1 -cdfq -- "$1" 4>&-; echo $? >&4) 3>&- |
150 eval "$cmp" - '"$2"' >&3
155 *[-.][zZ] | *_z | *[-.][gx]z | *[-.]bz2 | *[-.]lzma | *.t[abglx]z | *.tbz2 | -)
158 ($xz2 -cdfq -- "$2" 4>&-; echo $? >&4) 3>&- |
159 eval "$cmp" '"$1"' - >&3
162 eval "$cmp" '"$1"' '"$2"';;
166 echo >&2 "$0: Invalid number of operands; try \`${0##*/} --help' for help"
171 test "$xz_status" -eq 0 || exit 2