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. All advertising materials mentioning features or use of this software 19# must display the following acknowledgement: 20# This product includes software developed by the University of 21# California, Berkeley and its contributors. 22# 4. Neither the name of the University nor the names of its contributors 23# may be used to endorse or promote products derived from this software 24# without specific prior written permission. 25# 26# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36# SUCH DAMAGE. 37# 38# @(#)dirs 8.2 (Berkeley) 5/4/95 39# $FreeBSD: head/bin/sh/funcs/dirs 139969 2005-01-10 08:39:26Z imp $ 40 41# pushd, popd, and dirs --- written by Chris Bertin 42# Pixel Computer Inc. ...!wjh12!pixel!pixutl!chris 43# as modified by Patrick Elam of GTRI and Kenneth Almquist at UW 44 45pushd () { 46 SAVE=`pwd` 47 if [ "$1" = "" ] 48 then if [ "$DSTACK" = "" ] 49 then echo "pushd: directory stack empty." 50 return 1 51 fi 52 set $DSTACK 53 cd $1 || return 54 shift 1 55 DSTACK="$*" 56 else cd $1 > /dev/null || return 57 fi 58 DSTACK="$SAVE $DSTACK" 59 dirs 60} 61 62popd () { 63 if [ "$DSTACK" = "" ] 64 then echo "popd: directory stack empty." 65 return 1 66 fi 67 set $DSTACK 68 cd $1 69 shift 70 DSTACK=$* 71 dirs 72} 73 74dirs () { 75 echo "`pwd` $DSTACK" 76 return 0 77} 78