protected function ls($args)
{
$target = $args['target'];
$intersect = isset($args['intersect']) ? $args['intersect'] : array();
if (($volume = $this->volume($target)) == false || ($list = $volume->ls($target, $intersect)) === false) {
return array('error' => $this->error(self::ERROR_OPEN, '#' . $target));
}
return array('list' => $list);
}