- * This supplies binary coordinate data to a user level program
- * with a minimum of fuss.
- *
- * This discipline requires that tty device drivers call
- * the line specific l_ioctl routine from their ioctl routines,
- * assigning the result to cmd so that we can refuse most tty specific
- * ioctls which are unsafe because we have ambushed the
- * teletype input queues and other data, overlaying them with
- * the following information: the tty queue header, t_un.T_CTLQ,
- * is overlaid with a MTABCHAR character buffer -- the raw input
- * chars. The local characters (t_rocount on) are overlaid with
- * the current coordinate position.