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#
# which - emulation of `which' as it appears in FreeBSD
#
# usage: which [-as] command [command...]
#
#
# Chet Ramey <chet.ramey@case.edu>
#
# Copyright 1999 Chester Ramey
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# TThis program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
which()
{
local aflag sflag ES a opt
OPTIND=1
while builtin getopts as opt ; do
case "$opt" in
a) aflag=-a ;;
s) sflag=1 ;;
?) echo "which: usage: which [-as] command [command ...]" >&2
exit 2 ;;
esac
done
(( $OPTIND > 1 )) && shift $(( $OPTIND - 1 ))
# without command arguments, exit with status 1
ES=1
# exit status is 0 if all commands are found, 1 if any are not found
for command; do
# if $command is a function, make sure we add -a so type
# will look in $PATH after finding the function
a=$aflag
case "$(builtin type -t $command)" in
"function") a=-a;;
esac
if [ -n "$sflag" ]; then
builtin type -p $a $command >/dev/null 2>&1
else
builtin type -p $a $command
fi
ES=$?
done
return $ES
}
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