	case two('c','o'): rv = columns; break;
	case two('i','t'): rv = init_tabs; break;
	case two('l','i'): rv = lines; break;
	case two('l','m'): rv = lines_of_memory; break;
	case two('s','g'): rv = magic_cookie_glitch; break;
	case two('p','b'): rv = padding_baud_rate; break;
	case two('v','t'): rv = virtual_terminal; break;
	case two('w','s'): rv = width_status_line; break;
