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# @(#)popd 8.2 (Berkeley) 5/4/95 32# $FreeBSD$ 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