1#!/bin/sh 2 3#- 4# Copyright (c) 1991, 1993 5# The Regents of the University of California. All rights reserved. 6# 7# This code is derived from software contributed to Berkeley by 8# Kenneth Almquist. 9# 10# Redistribution and use in source and binary forms, with or without 11# modification, are permitted provided that the following conditions 12# are met: 13# 1. Redistributions of source code must retain the above copyright 14# notice, this list of conditions and the following disclaimer. 15# 2. Redistributions in binary form must reproduce the above copyright 16# notice, this list of conditions and the following disclaimer in the 17# documentation and/or other materials provided with the distribution. 18# 3. Neither the name of the University nor the names of its contributors 19# may be used to endorse or promote products derived from this software 20# without specific prior written permission. 21# 22# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32# SUCH DAMAGE. 33# 34# @(#)pushd 8.2 (Berkeley) 5/4/95 35 36# pushd, popd, and dirs --- written by Chris Bertin 37# Pixel Computer Inc. ...!wjh12!pixel!pixutl!chris 38# as modified by Patrick Elam of GTRI and Kenneth Almquist at UW 39 40pushd () { 41 SAVE=`pwd` 42 if [ "$1" = "" ] 43 then if [ "$DSTACK" = "" ] 44 then echo "pushd: directory stack empty." 45 return 1 46 fi 47 set $DSTACK 48 cd $1 || return 49 shift 1 50 DSTACK="$*" 51 else cd $1 > /dev/null || return 52 fi 53 DSTACK="$SAVE $DSTACK" 54 dirs 55} 56 57popd () { 58 if [ "$DSTACK" = "" ] 59 then echo "popd: directory stack empty." 60 return 1 61 fi 62 set $DSTACK 63 cd $1 64 shift 65 DSTACK=$* 66 dirs 67} 68 69dirs () { 70 echo "`pwd` $DSTACK" 71 return 0 72} 73