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# $FreeBSD$ 36 37# pushd, popd, and dirs --- written by Chris Bertin 38# Pixel Computer Inc. ...!wjh12!pixel!pixutl!chris 39# as modified by Patrick Elam of GTRI and Kenneth Almquist at UW 40 41pushd () { 42 SAVE=`pwd` 43 if [ "$1" = "" ] 44 then if [ "$DSTACK" = "" ] 45 then echo "pushd: directory stack empty." 46 return 1 47 fi 48 set $DSTACK 49 cd $1 || return 50 shift 1 51 DSTACK="$*" 52 else cd $1 > /dev/null || return 53 fi 54 DSTACK="$SAVE $DSTACK" 55 dirs 56} 57 58popd () { 59 if [ "$DSTACK" = "" ] 60 then echo "popd: directory stack empty." 61 return 1 62 fi 63 set $DSTACK 64 cd $1 65 shift 66 DSTACK=$* 67 dirs 68} 69 70dirs () { 71 echo "`pwd` $DSTACK" 72 return 0 73} 74