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|
#!/bin/sh -
#
# $OpenBSD: zdiff,v 1.3 2019/01/25 00:19:26 millert Exp $
#
# Copyright (c) 2003 Todd C. Miller <millert@openbsd.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.
#
# Set $prog based on $0
case $0 in
*cmp) prog=cmp
;;
*) prog=diff
;;
esac
USAGE="usage: z$prog [options] file1 [file2]"
# 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 "$1" in
--)
shift
break
;;
-*)
flags="$flags $1"
shift
;;
*)
break
;;
esac
done
if [ $# -eq 1 ]; then
# One file given, compare compressed to uncompressed
files="$1"
case "$1" in
*[._-][Zz])
files="${1%??}"
;;
*[._-]gz)
files="${1%???}"
;;
*.t[ag]z)
files="${1%??}"ar
;;
*) echo "z$prog: unknown suffix" 1>&2
exit 1
esac
compress -cdfq "$1" | $prog $flags - "$files"
status=$?
elif [ $# -eq 2 ]; then
# Two files given, compare the two uncompressing as needed
case "$1" in
*[._-][Zz]|*[._-]gz|*.t[ag]z)
files=-
filt="compress -cdfq $1"
;;
*)
files="$1"
;;
esac
case "$2" in
*[._-][Zz]|*[._-]gz|*.t[ag]z)
if [ "$files" = "-" ]; then
tmp=`mktemp -t z$prog.XXXXXXXXXX` || exit 1
trap "rm -f $tmp" 0 1 2 3 13 15
compress -cdfq "$2" > $tmp
files="$files $tmp"
else
files="$files -"
filt="compress -cdfq $2"
fi
;;
*)
files="$files $2"
;;
esac
if [ -n "$filt" ]; then
$filt | $prog $flags $files
else
$prog $flags $files
fi
status=$?
else
echo "$USAGE" 1>&2
exit 1
fi
exit $status
|
