#!/usr/bin/sh
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License, Version 1.0 only
# (the "License").  You may not use this file except in compliance
# with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or http://www.opensolaris.org/os/licensing.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#
#	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T
#	  All Rights Reserved


#	Copyright (c) 1999, 2001 by Sun Microsystems, Inc.
#	All rights reserved.

#ident	"%Z%%M%	%I%	%E% SMI"	/* SVr4.0 1.4	*/

setvar usage = ""usage: diff3 file1 file2 file3""

# mktmpdir - Create a private (mode 0700) temporary directory inside of /tmp
# for this process's temporary files.  We set up a trap to remove the 
# directory on exit (trap 0), and also on SIGHUP, SIGINT, SIGQUIT, SIGPIPE,
# and SIGTERM.

proc mktmpdir {
	setvar tmpdir = "/tmp/diff3.$Pid"
	trap '/usr/bin/rm -rf $tmpdir' 0 1 2 3 13 15
	/usr/bin/mkdir -m 700 $tmpdir || exit 1
}
mktmpdir

setvar e = ''
match $1 {
with -*
	setvar e = "$1"
	shift
}
if test $Argc != 3 {
	echo ${usage} 1>&2
	exit 1
}
if test '(' -f $1 -o -c $1 ')' -a '(' -f $2 -o -c $2 ')' -a '(' -f $3 -o -c $3 ')' {
	:
} else {
	echo ${usage} 1>&2
	exit 1
}
setvar f1 = "$1", f2 = "$2", f3 = "$3"
if test -c $f1
{
	/usr/bin/cat $f1 > $tmpdir/d3c$$
	setvar f1 = "$tmpdir/d3c$Pid"
}
if test -c $f2
{
	/usr/bin/cat $f2 > $tmpdir/d3d$$
	setvar f2 = "$tmpdir/d3d$Pid"
}
if test -c $f3
{
	/usr/bin/cat $f3 > $tmpdir/d3e$$
	setvar f3 = "$tmpdir/d3e$Pid"
}

/usr/bin/diff $f1 $f3 > $tmpdir/d3a$$ 2> $tmpdir/d3a$$.err
setvar STATUS = "$Status"
if test $STATUS -eq 1
{
	/usr/xpg4/bin/grep -q "^[<>]" $tmpdir/d3a$Pid
	setvar RET = "$Status"
	if test $RET -eq 1
	{
		/usr/bin/cat $tmpdir/d3a$Pid
		exit $STATUS
	}

	if test $RET -gt 1
	{
		echo "diff3 failed" 1>&2
		exit $STATUS
	}
}

if test $STATUS -gt 1
{
	/usr/bin/cat $tmpdir/d3a$Pid.err
	exit $STATUS
}

/usr/bin/diff $f2 $f3 > $tmpdir/d3b$$ 2> $tmpdir/d3b$$.err
setvar STATUS = "$Status"
if test $STATUS -eq 1
{
	/usr/xpg4/bin/grep -q "^[<>]" $tmpdir/d3b$Pid
	setvar RET = "$Status"
	if test $RET -eq 1
	{
		/usr/bin/cat $tmpdir/d3b$Pid
		exit $STATUS
	}

	if test $RET -gt 1
	{
		echo "diff3 failed" 1>&2
		exit $STATUS
	}
}

if test $STATUS -gt 1
{
	/usr/bin/cat $tmpdir/d3b$Pid.err
	exit $STATUS
}

/usr/lib/diff3prog $e $tmpdir/d3[ab]$Pid $f1 $f2 $f3