# THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T
# The copyright notice above does not evidence any
# actual or intended publication of such source code.
#ident "@(#)/bin/basename.sl 1.1 3.0 08/14/85 14579 "
if [ $# -gt 2 ]
then
echo >&2 "Usage: basename [ path [ suffix-pattern ] ]"
exit 1
fi
# If no first argument or first argument is null, make first argument
# "." Add beginning slash, then remove trailing slashes, then remove
# everything up through last slash, then remove suffix pattern if
# second argument is present.
# If nothing is left, first argument must be of form //*, in which
# case the basename is /.
exec /bin/expr \
"/${1:-.}" : '\(.*[^/]\)/*$' : '.*/\(..*\)' : "\\(.*\\)$2\$" \| \
"/${1:-.}" : '\(.*[^/]\)/*$' : '.*/\(..*\)' \| \
"/${1:-.}" : '.*/\(..*\)'
