dmenu/dmenu_run

#!/bin/sh
CACHE=${XDG_CACHE_HOME:-"$HOME/.cache"}/dmenu_run
if [ ! -d "`dirname "$CACHE"`" ]; then
	CACHE=$HOME/.dmenu_cache
fi
(
	IFS=:
	if ls -d $PATH | stest -q -n "$CACHE"; then
		for dir in $PATH; do
			ls $dir | stest -C $dir -fx
		done | sort -u > "$CACHE"
	fi
)
cmd=`dmenu "$@" < "$CACHE"` && exec sh -c "$cmd"