1 # $NetBSD: dirs,v 1.7 1995/05/11 21:31:08 christos Exp $ 2 # Copyright (c) 1991, 1993 3 # The Regents of the University of California. All rights reserved. 4 # 5 # This code is derived from software contributed to Berkeley by 6 # Kenneth Almquist. 7 # 8 # Redistribution and use in source and binary forms, with or without 9 # modification, are permitted provided that the following conditions 10 # are met: 11 # 1. Redistributions of source code must retain the above copyright 12 # notice, this list of conditions and the following disclaimer. 13 # 2. Redistributions in binary form must reproduce the above copyright 14 # notice, this list of conditions and the following disclaimer in the 15 # documentation and/or other materials provided with the distribution. 16 # 3. All advertising materials mentioning features or use of this software 17 # must display the following acknowledgement: 18 # This product includes software developed by the University of 19 # California, Berkeley and its contributors. 20 # 4. Neither the name of the University nor the names of its contributors 21 # may be used to endorse or promote products derived from this software 22 # without specific prior written permission. 23 # 24 # THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 # ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 # SUCH DAMAGE. 35 # 36 # @(#)dirs 8.2 (Berkeley) 5/4/95 37 38 # pushd, popd, and dirs --- written by Chris Bertin 39 # Pixel Computer Inc. ...!wjh12!pixel!pixutl!chris 40 # as modified by Patrick Elam of GTRI and Kenneth Almquist at UW 41 42 pushd () { 43 SAVE=`pwd` 44 if [ "$1" = "" ] 45 then if [ "$DSTACK" = "" ] 46 then echo "pushd: directory stack empty." 47 return 1 48 fi 49 set $DSTACK 50 cd $1 || return 51 shift 1 52 DSTACK="$*" 53 else cd $1 > /dev/null || return 54 fi 55 DSTACK="$SAVE $DSTACK" 56 dirs 57 } 58 59 popd () { 60 if [ "$DSTACK" = "" ] 61 then echo "popd: directory stack empty." 62 return 1 63 fi 64 set $DSTACK 65 cd $1 66 shift 67 DSTACK=$* 68 dirs 69 } 70 71 dirs () { 72 echo "`pwd` $DSTACK" 73 return 0 74 } 75
