dirs revision 127958 
1# Copyright (c) 1991, 1993
2#	The Regents of the University of California.  All rights reserved.
3#
4# This code is derived from software contributed to Berkeley by
5# Kenneth Almquist.
6#
7# Redistribution and use in source and binary forms, with or without
8# modification, are permitted provided that the following conditions
9# are met:
10# 1. Redistributions of source code must retain the above copyright
11#    notice, this list of conditions and the following disclaimer.
12# 2. Redistributions in binary form must reproduce the above copyright
13#    notice, this list of conditions and the following disclaimer in the
14#    documentation and/or other materials provided with the distribution.
15# 4. Neither the name of the University nor the names of its contributors
16#    may be used to endorse or promote products derived from this software
17#    without specific prior written permission.
18#
19# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29# SUCH DAMAGE.
30#
31#	@(#)dirs	8.2 (Berkeley) 5/4/95
32# $FreeBSD: head/bin/sh/funcs/dirs 127958 2004-04-06 20:06:54Z markm $
33
34# pushd, popd, and dirs --- written by Chris Bertin
35# Pixel Computer Inc. ...!wjh12!pixel!pixutl!chris
36# as modified by Patrick Elam of GTRI and Kenneth Almquist at UW
37
38pushd () {
39	SAVE=`pwd`
40	if [ "$1" = "" ] 
41	then	if [ "$DSTACK" = "" ]
42		then	echo "pushd: directory stack empty."
43			return 1
44		fi
45		set $DSTACK
46		cd $1 || return
47		shift 1
48		DSTACK="$*"
49	else	cd $1 > /dev/null || return
50	fi
51	DSTACK="$SAVE $DSTACK"
52	dirs
53}
54
55popd () {
56	if [ "$DSTACK" = "" ] 
57	then	echo "popd: directory stack empty."
58		return 1
59	fi
60	set $DSTACK
61	cd $1
62	shift
63	DSTACK=$*
64	dirs
65}
66
67dirs () {
68	echo "`pwd` $DSTACK"
69	return 0
70}
71