1#!/bin/mksh
2# $MirOS: src/usr.bin/diff3/diff3.ksh,v 1.5 2009/10/19 20:43:50 tg Exp $
3# $OpenBSD: diff3.ksh,v 1.4 2006/02/22 22:35:11 jmc Exp $
4#
5# Copyright (c) 2003 Todd C. Miller <Todd.Miller@courtesan.com>
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
24export PATH=/bin:/usr/bin
25diff3prog=/usr/libexec/diff3prog
26USAGE="usage: diff3 [-3aEeXx] file1 file2 file3"
27
28# Pull out any command line flags (some for diff, some for diff3)
29dflags=
30d3flags=
31while getopts "aeExX3" c; do
32	case "$c" in
33		a)
34			dflags="$dflags -$c"
35			;;
36		e|E|x|X|3)
37			d3flags="-$c"
38			;;
39		*)
40			echo "$USAGE" 1>&2
41			exit 1
42			;;
43	esac
44done
45shift $(( $OPTIND - 1 ))
46
47if [ $# -lt 3 ]; then
48	echo "$USAGE" 1>&2
49	exit 1
50fi
51
52TMP1=`mktemp -t d3a.XXXXXXXXXX` || exit 1
53TMP2=`mktemp -t d3b.XXXXXXXXXX`
54if [ $? -ne 0 ]; then
55	rm -f $TMP1
56	exit 1
57fi
58trap "/bin/rm -f $TMP1 $TMP2" 0 1 2 13 15
59diff $dflags -- $1 $3 > $TMP1
60diff $dflags -- $2 $3 > $TMP2
61$diff3prog $d3flags -- $TMP1 $TMP2 $1 $2 $3
62exit $?
63