ndcd             2344 kern/tty.c     ttytstamp(struct tty *tp, int octs, int ncts, int odcd, int ndcd)
ndcd             2351 kern/tty.c     	if (ndcd ^ odcd)
ndcd             2352 kern/tty.c     		doit |= ndcd ? ISSET(tp->t_flags, TS_TSTAMPDCDSET) :
ndcd              295 sys/tty.h      void	 ttytstamp(struct tty *tp, int octs, int ncts, int odcd, int ndcd);