1#!/bin/sh - 2# 3# $NetBSD: zdiff,v 1.2 2003/12/28 12:43:43 wiz Exp $ 4# $DragonFly: src/usr.bin/gzip/zdiff,v 1.1 2004/10/26 11:19:31 joerg Exp $ 5# $OpenBSD: zdiff,v 1.2 2003/07/29 07:42:44 otto Exp $ 6# 7# Copyright (c) 2003 Todd C. Miller <Todd.Miller@courtesan.com> 8# 9# Permission to use, copy, modify, and distribute this software for any 10# purpose with or without fee is hereby granted, provided that the above 11# copyright notice and this permission notice appear in all copies. 12# 13# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 14# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 15# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 16# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 17# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 18# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 19# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 20# 21# Sponsored in part by the Defense Advanced Research Projects 22# Agency (DARPA) and Air Force Research Laboratory, Air Force 23# Materiel Command, USAF, under agreement number F39502-99-1-0512. 24# 25 26# Set $prog based on $0 27case $0 in 28 *cmp) prog=cmp 29 ;; 30 *) prog=diff 31 ;; 32esac 33USAGE="usage: z$prog [options] file1 [file2]" 34 35# Pull out any command line flags so we can pass them to diff/cmp 36# XXX - assumes there is no optarg 37flags= 38while test $# -ne 0; do 39 case "$1" in 40 --) 41 shift 42 break 43 ;; 44 -*) 45 flags="$flags $1" 46 shift 47 ;; 48 *) 49 break 50 ;; 51 esac 52done 53 54if [ $# -eq 1 ]; then 55 # One file given, compare compressed to uncompressed 56 files="$1" 57 case "$1" in 58 *[._-][Zz]) 59 files="${1%??}" 60 ;; 61 *[._-]gz) 62 files="${1%???}" 63 ;; 64 *.t[ag]z) 65 files="${1%??}"ar 66 ;; 67 *) echo "z$prog: unknown suffix" 1>&2 68 exit 1 69 esac 70 gzip -cdfq "$1" | $prog $flags - "$files" 71 status=$? 72elif [ $# -eq 2 ]; then 73 # Two files given, compare the two uncompressing as needed 74 case "$1" in 75 *[._-][Zz]|*[._-]gz|*.t[ag]z) 76 files=- 77 filt="gzip -cdfq $1" 78 ;; 79 *) 80 files="$1" 81 ;; 82 esac 83 case "$2" in 84 *[._-][Zz]|*[._-]gz|*.t[ag]z) 85 if [ "$files" = "-" ]; then 86 tmp=`mktemp -t z$prog.XXXXXXXXXX` || exit 1 87 trap "rm -f $tmp" 0 1 2 3 13 15 88 gzip -cdfq "$2" > $tmp 89 files="$files $tmp" 90 else 91 files="$files -" 92 filt="gzip -cdfq $2" 93 fi 94 ;; 95 *) 96 files="$files $2" 97 ;; 98 esac 99 if [ -n "$filt" ]; then 100 $filt | $prog $flags $files 101 else 102 $prog $flags $files 103 fi 104 status=$? 105else 106 echo "$USAGE" 1>&2 107 exit 1 108fi 109 110exit $status 111