dirs revision 1.6 
1#	$NetBSD: dirs,v 1.6 1995/03/21 09:10:54 cgd Exp $
2#
3# Copyright (c) 1991, 1993
4#	The Regents of the University of California.  All rights reserved.
5#
6# This code is derived from software contributed to Berkeley by
7# Kenneth Almquist.
8#
9# Redistribution and use in source and binary forms, with or without
10# modification, are permitted provided that the following conditions
11# are met:
12# 1. Redistributions of source code must retain the above copyright
13#    notice, this list of conditions and the following disclaimer.
14# 2. Redistributions in binary form must reproduce the above copyright
15#    notice, this list of conditions and the following disclaimer in the
16#    documentation and/or other materials provided with the distribution.
17# 3. All advertising materials mentioning features or use of this software
18#    must display the following acknowledgement:
19#	This product includes software developed by the University of
20#	California, Berkeley and its contributors.
21# 4. Neither the name of the University nor the names of its contributors
22#    may be used to endorse or promote products derived from this software
23#    without specific prior written permission.
24#
25# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35# SUCH DAMAGE.
36#
37#	@(#)dirs	8.1 (Berkeley) 5/31/93
38
39# pushd, popd, and dirs --- written by Chris Bertin
40# Pixel Computer Inc. ...!wjh12!pixel!pixutl!chris
41# as modified by Patrick Elam of GTRI and Kenneth Almquist at UW
42
43pushd () {
44	SAVE=`pwd`
45	if [ "$1" = "" ] 
46	then	if [ "$DSTACK" = "" ]
47		then	echo "pushd: directory stack empty."
48			return 1
49		fi
50		set $DSTACK
51		cd $1 || return
52		shift 1
53		DSTACK="$*"
54	else	cd $1 > /dev/null || return
55	fi
56	DSTACK="$SAVE $DSTACK"
57	dirs
58}
59
60popd () {
61	if [ "$DSTACK" = "" ] 
62	then	echo "popd: directory stack empty."
63		return 1
64	fi
65	set $DSTACK
66	cd $1
67	shift
68	DSTACK=$*
69	dirs
70}
71
72dirs () {
73	echo "`pwd` $DSTACK"
74	return 0
75}
76