2 # sh is buggy on RS/6000 AIX 3.2. Replace above line with #!/bin/ksh
4 # Copyright (C) 1998, 2002, 2006, 2007 Free Software Foundation
5 # Copyright (C) 1993 Jean-loup Gailly
7 # This program is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 2 of the License, or
10 # (at your option) any later version.
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License along
18 # with this program; if not, write to the Free Software Foundation, Inc.,
19 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
25 prog=cmp; cmp='${CMP-cmp}' ;;
26 *) prog=diff; cmp='${DIFF-diff}';;
29 version="z$prog (gzip) @VERSION@
30 Copyright (C) 2007 Free Software Foundation, Inc.
31 This is free software. You may redistribute copies of it under the terms of
32 the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
33 There is NO WARRANTY, to the extent permitted by law.
35 Written by Jean-loup Gailly."
37 usage="Usage: $0 [OPTION]... FILE1 [FILE2]
38 Compare FILE1 to FILE2, using their uncompressed contents if they are
39 compressed. If FILE2 is omitted, compare FILE1 to the uncompressed
40 contents of FILE1.gz. Do comparisons like '$prog' does.
42 OPTIONs are the same as for '$prog'.
44 Report bugs to <bug-gzip@gnu.org>."
46 # sed script to escape all ' for the shell, and then (to handle trailing
47 # newlines correctly) turn trailing X on last line into '.
49 s/'\''/'\''\\'\'''\''/g
55 --h*) printf '%s\n' "$usage" || exit 2; exit;;
56 --v*) echo "$version" || exit 2; exit;;
58 -*\'*) cmp="$cmp '"`printf '%sX\n' "$1" | sed "$escape"`;;
59 -?*) cmp="$cmp '$1'";;
68 test "X$file" = X- || <"$file" || exit 2
74 if test $# -eq 1; then
76 *[-.]gz* | *[-.][zZ] | *.t[ga]z)
77 FILE=`expr "X$1" : 'X\(.*\)[-.][zZtga]*$'`
80 (gzip -cd -- "$1" 4>&-; echo $? >&4) 3>&- | eval "$cmp" - '"$FILE"' >&3
83 echo >&2 "$0: $1: unknown compressed file extension"
86 elif test $# -eq 2; then
88 *[-.]gz* | *[-.][zZ] | *.t[ga]z | -)
90 *[-.]gz* | *[-.][zZ] | *.t[ga]z | -)
91 if test "$1$2" = --; then
94 (gzip -cdfq - 4>&-; echo $? >&4) 3>&- |
98 # Reject Solaris 8's buggy /bin/bash 2.03.
100 (echo X | eval "$cmp" /dev/fd/5 - >/dev/null 2>&1) \
105 (gzip -cdfq -- "$1" 4>&-; echo $? >&4) 3>&- |
106 ( (gzip -cdfq -- "$2" 4>&-; echo $? >&4) 3>&- 5<&- </dev/null |
107 eval "$cmp" /dev/fd/5 - >&3) 5<&0
110 *[1-9]*) gzip_status=1;;
114 F=`expr "/$2" : '.*/\(.*\)[-.][zZtga]*$'` || F=$prog
117 test -n "$tmp" && rm -f "$tmp"
119 ' HUP INT PIPE TERM 0
120 if type mktemp >/dev/null 2>&1; then
121 tmp=`mktemp -t -- "$F.XXXXXX"` || exit 2
124 tmp=${TMPDIR-/tmp}/$F.$$
126 gzip -cdfq -- "$2" > "$tmp" || exit 2
129 (gzip -cdfq -- "$1" 4>&-; echo $? >&4) 3>&- |
130 eval "$cmp" - '"$tmp"' >&3
133 rm -f "$tmp" || gzip_status=$?
134 trap - HUP INT PIPE TERM 0
140 (gzip -cdfq -- "$1" 4>&-; echo $? >&4) 3>&- |
141 eval "$cmp" - '"$2"' >&3
145 *[-.]gz* | *[-.][zZ] | *.t[ga]z | -)
148 (gzip -cdfq -- "$2" 4>&-; echo $? >&4) 3>&- |
149 eval "$cmp" '"$1"' - >&3
151 *) eval "$cmp" '"$1"' '"$2"';;
155 echo >&2 "$0: invalid number of operands; try \`$0 --help' for help"
160 test "$gzip_status" -eq 0 || exit 2