> rsalz> */* ) echo "$I" | sed -e 's@\(.*\)/.*@\1@' ;;
>
> Why such a complicated sed? 's@/[^/]*$@@' is perfecty sufficient, and
> a little bit more efficient :-).
Because it makes the implementation of "basename" pretty obvious :)
As for efficiency :) here's an implementation that uses all shell
builtins ...
#! /bin/sh
export IFS
case "$1" in
*/*)
OLDIFS="$IFS" ; IFS=/ ; set $1 ; IFS="$OLDIFS"
p=''
while : ; do
case "$2" in
"") break ;;
esac
case "$p" in
"") p="$1" ;;
*) p="$p/$1" ;;
esac
shift
done
echo $p
;;
*)
echo .
;;
esac
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