basename.sh revision 7c478bd95313f5f23a4c958a745db2134aa03244
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License, Version 1.0 only
# (the "License"). You may not use this file except in compliance
# with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#
# Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T
# All Rights Reserved
#ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.8 */
if [ $# -gt 2 ]
then
echo >&2 "Usage: basename [ path [ suffix-pattern ] ]"
exit 1
fi
# If no first argument or first argument is null, make first argument
# "." Add beginning slash, then remove trailing slashes, then remove
# everything up through last slash, then remove suffix pattern if
# second argument is present.
# If nothing is left, first argument must be of form //*, in which
# case the basename is /.
"/${1:-.}" : '\(.*[^/]\)/*$' : '.*/\(..*\)' : "\\(.*\\)$2\$" \| \
"/${1:-.}" : '\(.*[^/]\)/*$' : '.*/\(..*\)' \| \
"/${1:-.}" : '.*/\(..*\)'