1#!/bin/sh - 2# 3# $OpenBSD: zdiff,v 1.3 2019/01/25 00:19:26 millert Exp $ 4# 5# Copyright (c) 2003 Todd C. Miller <millert@openbsd.org> 6# 7# Permission to use, copy, modify, and distribute this software for any 8# purpose with or without fee is hereby granted, provided that the above 9# copyright notice and this permission notice appear in all copies. 10# 11# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18# 19# Sponsored in part by the Defense Advanced Research Projects 20# Agency (DARPA) and Air Force Research Laboratory, Air Force 21# Materiel Command, USAF, under agreement number F39502-99-1-0512. 22# 23 24# Set $prog based on $0 25case $0 in 26 *cmp) prog=cmp 27 ;; 28 *) prog=diff 29 ;; 30esac 31USAGE="usage: z$prog [options] file1 [file2]" 32 33# Pull out any command line flags so we can pass them to diff/cmp 34# XXX - assumes there is no optarg 35flags= 36while test $# -ne 0; do 37 case "$1" in 38 --) 39 shift 40 break 41 ;; 42 -*) 43 flags="$flags $1" 44 shift 45 ;; 46 *) 47 break 48 ;; 49 esac 50done 51 52if [ $# -eq 1 ]; then 53 # One file given, compare compressed to uncompressed 54 files="$1" 55 case "$1" in 56 *[._-][Zz]) 57 files="${1%??}" 58 ;; 59 *[._-]gz) 60 files="${1%???}" 61 ;; 62 *.t[ag]z) 63 files="${1%??}"ar 64 ;; 65 *) echo "z$prog: unknown suffix" 1>&2 66 exit 1 67 esac 68 compress -cdfq "$1" | $prog $flags - "$files" 69 status=$? 70elif [ $# -eq 2 ]; then 71 # Two files given, compare the two uncompressing as needed 72 case "$1" in 73 *[._-][Zz]|*[._-]gz|*.t[ag]z) 74 files=- 75 filt="compress -cdfq $1" 76 ;; 77 *) 78 files="$1" 79 ;; 80 esac 81 case "$2" in 82 *[._-][Zz]|*[._-]gz|*.t[ag]z) 83 if [ "$files" = "-" ]; then 84 tmp=`mktemp -t z$prog.XXXXXXXXXX` || exit 1 85 trap "rm -f $tmp" 0 1 2 3 13 15 86 compress -cdfq "$2" > $tmp 87 files="$files $tmp" 88 else 89 files="$files -" 90 filt="compress -cdfq $2" 91 fi 92 ;; 93 *) 94 files="$files $2" 95 ;; 96 esac 97 if [ -n "$filt" ]; then 98 $filt | $prog $flags $files 99 else 100 $prog $flags $files 101 fi 102 status=$? 103else 104 echo "$USAGE" 1>&2 105 exit 1 106fi 107 108exit $status 109