45 lines
852 B
Text
45 lines
852 B
Text
|
#
|
||
|
|
# which - emulation of `which' as it appears in FreeBSD
|
||
|
|
#
|
||
|
|
# usage: which [-as] command [command...]
|
||
|
|
#
|
||
|
|
|
||
|
|
which()
|
||
|
|
{
|
||
|
|
local aflag sflag ES a
|
||
|
|
|
||
|
|
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
|
||
|
|
}
|