68 lines
2.1 KiB
Plaintext
68 lines
2.1 KiB
Plaintext
# $NetBSD: pushd,v 1.8 2016/02/29 23:50:59 christos Exp $
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# Copyright (c) 1991, 1993
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# The Regents of the University of California. All rights reserved.
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#
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# This code is derived from software contributed to Berkeley by
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# Kenneth Almquist.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# @(#)pushd 8.2 (Berkeley) 5/4/95
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# pushd, popd, and dirs --- written by Chris Bertin
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# Pixel Computer Inc. ...!wjh12!pixel!pixutl!chris
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# as modified by Patrick Elam of GTRI and Kenneth Almquist at UW
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pushd () {
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SAVE=`pwd`
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if [ "$1" = "" ]
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then if [ "$DSTACK" = "" ]
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then echo "pushd: directory stack empty."
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return 1
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fi
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set $DSTACK
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cd $1 || return
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shift 1
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DSTACK="$*"
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else cd $1 > /dev/null || return
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fi
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DSTACK="$SAVE $DSTACK"
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dirs
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}
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popd () {
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if [ "$DSTACK" = "" ]
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then echo "popd: directory stack empty."
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return 1
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fi
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set $DSTACK
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cd $1
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shift
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DSTACK=$*
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dirs
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}
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dirs () {
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echo "`pwd` $DSTACK"
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return 0
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}
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