/* RS-485 structures */
  
  /* Used with ioctl() TIOCSERSETRS485 for backward compatibility!
   * XXX: Do not use it for new code!
   */
  struct rs485_control {
          unsigned short rts_on_send;
          unsigned short rts_after_sent;
          unsigned long delay_rts_before_send;
          unsigned short enabled;
  };
  
  /* Used with ioctl() TIOCSERWRRS485 */
  struct rs485_write {
          unsigned short outc_size;
          unsigned char *outc;
  };