octs             2344 kern/tty.c     ttytstamp(struct tty *tp, int octs, int ncts, int odcd, int ndcd)
octs             2348 kern/tty.c     	if (ncts ^ octs)
octs              295 sys/tty.h      void	 ttytstamp(struct tty *tp, int octs, int ncts, int odcd, int ndcd);