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, 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