[unix-history] / bin / sh / funcs / dirs

# Copyright (c) 1991 The Regents of the University of California.
# All rights reserved.
#
# This code is derived from software contributed to Berkeley by
# Kenneth Almquist.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
# 3. All advertising materials mentioning features or use of this software
#    must display the following acknowledgement:
#	This product includes software developed by the University of
#	California, Berkeley and its contributors.
# 4. Neither the name of the University nor the names of its contributors
#    may be used to endorse or promote products derived from this software
#    without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
#	@(#)dirs	5.1 (Berkeley) 3/7/91
#
#	/b/source/CVS/src/bin/sh/funcs/dirs,v 1.3 1993/03/23 00:29:47 cgd Exp

# pushd, popd, and dirs --- written by Chris Bertin
# Pixel Computer Inc. ...!wjh12!pixel!pixutl!chris
# as modified by Patrick Elam of GTRI and Kenneth Almquist at UW

pushd () {
	SAVE=`pwd`
	if [ "$1" = "" ] 
	then	if [ "$DSTACK" = "" ]
		then	echo "pushd: directory stack empty."
			return 1
		fi
		set $DSTACK
		cd $1 || return
		shift 1
		DSTACK="$*"
	else	cd $1 > /dev/null || return
	fi
	DSTACK="$SAVE $DSTACK"
	dirs
}

popd () {
	if [ "$DSTACK" = "" ] 
	then	echo "popd: directory stack empty."
		return 1
	fi
	set $DSTACK
	cd $1
	shift
	DSTACK=$*
	dirs
}

dirs () {
	echo "`pwd` $DSTACK"
	return 0
}
Commit	Line	Data
15637ed4 RG	1	# Copyright (c) 1991 The Regents of the University of California.
	2	# All rights reserved.
	3	#
	4	# This code is derived from software contributed to Berkeley by
	5	# Kenneth Almquist.
	6	#
	7	# Redistribution and use in source and binary forms, with or without
	8	# modification, are permitted provided that the following conditions
	9	# are met:
	10	# 1. Redistributions of source code must retain the above copyright
	11	# notice, this list of conditions and the following disclaimer.
	12	# 2. Redistributions in binary form must reproduce the above copyright
	13	# notice, this list of conditions and the following disclaimer in the
	14	# documentation and/or other materials provided with the distribution.
	15	# 3. All advertising materials mentioning features or use of this software
	16	# must display the following acknowledgement:
	17	# This product includes software developed by the University of
	18	# California, Berkeley and its contributors.
	19	# 4. Neither the name of the University nor the names of its contributors
	20	# may be used to endorse or promote products derived from this software
	21	# without specific prior written permission.
	22	#
	23	# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	24	# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	25	# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	26	# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	27	# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	28	# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	29	# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	30	# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	31	# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	32	# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	33	# SUCH DAMAGE.
	34	#
	35	# @(#)dirs 5.1 (Berkeley) 3/7/91
78ed81a3	36	#
78ed81a3	37	# /b/source/CVS/src/bin/sh/funcs/dirs,v 1.3 1993/03/23 00:29:47 cgd Exp
15637ed4 RG	38
	39	# pushd, popd, and dirs --- written by Chris Bertin
	40	# Pixel Computer Inc. ...!wjh12!pixel!pixutl!chris
	41	# as modified by Patrick Elam of GTRI and Kenneth Almquist at UW
	42
	43	pushd () {
	44	SAVE=`pwd`
	45	if [ "$1" = "" ]
	46	then if [ "$DSTACK" = "" ]
	47	then echo "pushd: directory stack empty."
	48	return 1
	49	fi
	50	set $DSTACK
	51	cd $1 \|\| return
	52	shift 1
	53	DSTACK="$*"
	54	else cd $1 > /dev/null \|\| return
	55	fi
	56	DSTACK="$SAVE $DSTACK"
	57	dirs
	58	}
	59
	60	popd () {
	61	if [ "$DSTACK" = "" ]
	62	then echo "popd: directory stack empty."
	63	return 1
	64	fi
	65	set $DSTACK
	66	cd $1
	67	shift
	68	DSTACK=$*
	69	dirs
	70	}
	71
	72	dirs () {
	73	echo "`pwd` $DSTACK"
	74	return 0
	75	}