shopt -s extglob

_fortune ()
{
	local cur
	cur=${COMP_WORDS[COMP_CWORD]}
	COMPREPLY=( $( compgen -W "`ls -d /usr/share/games/fortunes/* /usr/share/games/fortunes/*/* | sed -e s:.dat:: -e s:/usr/share/games/fortunes/::`" $cur ))
}
complete -F _fortune fortune