-uptodate() {
- test -f "$CACHE" &&
- for dir in $PATH
- do
- test ! $dir -nt "$CACHE" || return 1
- done
-}
-
-if ! uptodate
-then
- for dir in $PATH
- do
- cd "$dir" &&
- for file in *
- do
- test -x "$file" && echo "$file"
- done
- done | sort -u > "$CACHE".$$ &&
- mv "$CACHE".$$ "$CACHE"
+if ! test -f "$CACHE" || find $PATH -type d -newer "$CACHE" | grep -q .; then
+ lsx $PATH | sort -u > "$CACHE"