WP_Filesystem_Direct::group

	 *
	 * FIXME does not handle errors in fileperms()
	 *
	 * @since 2.5.0
	 *
	 * @param string $file Path to the file.
	 * @return string Mode of the file (the last 3 digits).
	 */
	public function getchmod( $file ) {
		return substr( decoct( @fileperms( $file ) ), -3 );
	}