diff options
Diffstat (limited to 'usr.bin/gzip/zdiff')
| -rw-r--r-- | usr.bin/gzip/zdiff | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/usr.bin/gzip/zdiff b/usr.bin/gzip/zdiff new file mode 100644 index 0000000..9e9aca6 --- /dev/null +++ b/usr.bin/gzip/zdiff @@ -0,0 +1,142 @@ +#!/bin/sh - +# +# $NetBSD: zdiff,v 1.5 2010/04/14 20:30:28 joerg Exp $ +# +# $OpenBSD: zdiff,v 1.2 2003/07/29 07:42:44 otto Exp $ +# +#- +# Copyright (c) 2003 Todd C. Miller <Todd.Miller@courtesan.com> +# Copyright (c) 2010 Joerg Sonnenberger <joerg@NetBSD.org> +# +# Permission to use, copy, modify, and distribute this software for any +# purpose with or without fee is hereby granted, provided that the above +# copyright notice and this permission notice appear in all copies. +# +# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES +# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF +# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR +# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES +# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN +# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF +# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +# +# Sponsored in part by the Defense Advanced Research Projects +# Agency (DARPA) and Air Force Research Laboratory, Air Force +# Materiel Command, USAF, under agreement number F39502-99-1-0512. +# +# $FreeBSD$ + +# Set $prog based on $0 +case $0 in + *cmp) prog=cmp + ;; + *) prog=diff + ;; +esac +USAGE="usage: $0 [options] file1 [file2]" + +check_suffix() { + case "$1" in + *[._-][Zz]) + setvar $2 "${1%??}" + setvar $3 "gzip -cdqf" + ;; + *[._-]bz) + setvar $2 "${1%???}" + setvar $3 "bzip2 -cdqf" + ;; + *[._-]gz) + setvar $2 "${1%???}" + setvar $3 "gzip -cdqf" + ;; + *[._-]xz) + setvar $2 "${1%???}" + setvar $3 "xz -cdqf" + ;; + *[._-]bz2) + setvar $2 "${1%????}" + setvar $3 "bzip2 -cdqf" + ;; + *[._-]lzma) + setvar $2 "${1%?????}" + setvar $3 "xz -cdqf" + ;; + *.t[ag]z) + setvar $2 "${1%??}"ar + setvar $3 "gzip -cdqf" + ;; + *.tbz) + setvar $2 "${1%??}"ar + setvar $3 "bzip2 -cdqf" + ;; + *.tbz2) + setvar $2 "${1%???}"ar + setvar $3 "bzip2 -cdqf" + ;; + *.t[lx]z) + setvar $2 "${1%??}"ar + setvar $3 "xz -cdqf" + ;; + *) + setvar $2 "$1" + setvar $3 "" + ;; + esac +} + + +# Pull out any command line flags so we can pass them to diff/cmp +# XXX - assumes there is no optarg +flags= +while test $# -ne 0; do + case "$1" in + --) + shift + break + ;; + -) + break + ;; + -*) + flags="$flags $1" + shift + ;; + *) + break + ;; + esac +done + +if [ $# -eq 1 ]; then + # One file given, compare compressed to uncompressed + files="$1" + check_suffix "$1" files filt + if [ -z "$filt" ]; then + echo "z$prog: unknown suffix" 1>&2 + exit 1 + fi + $filt -- "$1" | $prog $flags -- - "$files" + status=$? +elif [ $# -eq 2 ]; then + # Two files given, compare the two uncompressing as needed + check_suffix "$1" files filt + check_suffix "$2" files2 filt2 + if [ -z "$filt" -a -z "$filt2" ]; then + $prog $flags -- "$1" "$2" + elif [ -z "$filt" -a -n "$filt2" -a "$1" != "-" ]; then + $filt2 -- "$2" | $prog $flags -- "$1" - + elif [ -n "$filt" -a -z "$filt2" -a "$2" != "-" ]; then + $filt -- "$1" | $prog $flags -- - "$2" + else + tmp=`mktemp -t z$prog.XXXXXXXXXX` || exit 1 + trap "rm -f $tmp" 0 1 2 3 13 15 + ${filt2:-cat} -- "$2" > $tmp || exit $? + ${filt:-cat} -- "$1" | $prog $flags -- - "$tmp" + fi + status=$? +else + echo "$USAGE" 1>&2 + exit 1 +fi + +exit $status |
