1#! /bin/sh
2#
3# Enhanced sccs diff utility for use with vc mode.
4# This version is more compatible with rcsdiff(1).
5#
6# Copyright (C) 1992, 1993, 1995, 1997, 2001, 2002, 2003, 2004,
7#               2005, 2006, 2007 Free Software Foundation, Inc.
8#
9# This file is part of GNU Emacs.
10#
11# GNU Emacs is free software; you can redistribute it and/or modify
12# it under the terms of the GNU General Public License as published by
13# the Free Software Foundation; either version 2, or (at your option)
14# any later version.
15#
16# GNU Emacs is distributed in the hope that it will be useful,
17# but WITHOUT ANY WARRANTY; without even the implied warranty of
18# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19# GNU General Public License for more details.
20#
21# You should have received a copy of the GNU General Public License
22# along with GNU Emacs; see the file COPYING.  If not, write to the
23# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
24# Boston, MA 02110-1301, USA.
25#
26
27DIFF="diff"
28usage="$0: Usage: vcdiff [--brief] [-q] [-r<sid1>] [-r<sid2>] [diffopts] sccsfile..."
29
30PATH=$PATH:/usr/ccs/bin:/usr/sccs:/usr/xpg4/bin # common SCCS hangouts
31
32echo="echo"
33sid1= sid2=
34
35for f
36do
37	case $f in
38	-*)
39		case $f in
40		--brief)
41			DIFF=cmp;;
42		-q)
43			echo=:;;
44		-r?*)
45			case $sid1 in
46			'')
47				sid1=$f
48				;;
49			*)
50				case $sid2 in
51				?*) echo "$usage" >&2; exit 2 ;;
52				esac
53				sid2=$f
54				;;
55			esac
56			;;
57		*)
58			options="$options $f"
59			;;
60		esac
61		shift
62		;;
63	*)
64		break
65		;;
66	esac
67done
68
69case $# in
700)
71	echo "$usage" >&2
72	exit 2
73esac
74
75
76rev1= rev2= status=0
77trap 'status=2; exit' 1 2 13 15
78trap 'rm -f $rev1 $rev2 || status=2; exit $status' 0
79
80for f
81do
82	s=2
83
84	case $f in
85	s.* | */s.*)
86		if
87			rev1=`mktemp /tmp/geta.XXXXXXXX`
88			get -s -p -k $sid1 "$f" > $rev1 &&
89			case $sid2 in
90			'')
91				workfile=`expr " /$f" : '.*/s.\(.*\)'`
92				;;
93			*)
94				rev2=`mktemp /tmp/getb.XXXXXXXX`
95				get -s -p -k $sid2 "$f" > $rev2
96				workfile=$rev2
97			esac
98		then
99			$echo $DIFF $options $rev1 $workfile >&2
100			$DIFF $options $rev1 $workfile
101			s=$?
102		fi
103		;;
104	*)
105		echo "$0: $f is not an SCCS file" >&2
106	esac
107
108	if test $status -lt $s
109	then status=$s
110	fi
111done
112
113# arch-tag: 4344ba3a-bcbe-4f77-971c-f43c1606953a
114