Function ttydisc_rint

freebsd/kern/tty_ttydisc.c:854–1095

}

int
ttydisc_rint(struct tty *tp, char c, int flags)
{
	int signal, quote = 0;
	char ob[3] = { 0xff, 0x00 };
	size_t ol;

	tty_assert_locked(tp);

	atomic_add_long(&tty_nin, 1);

	if (ttyhook_hashook(tp, rint))
		return ttyhook_rint(tp, c, flags);

	if (tp->t_flags & TF_BYPASS)
		goto processed;

	if (flags) {
		if (flags & TRE_BREAK) {
			if (CMP_FLAG(i, IGNBRK)) {
				/* Ignore break characters. */
				return (0);
			} else if (CMP_FLAG(i, BRKINT)) {
				/* Generate SIGINT on break. */
				tty_flush(tp, FREAD|FWRITE);
				tty_signal_pgrp(tp, SIGINT);
				return (0);
			} else {
				/* Just print it. */
				goto parmrk;
			}
		} else if (flags & TRE_FRAMING ||
		    (flags & TRE_PARITY && CMP_FLAG(i, INPCK))) {
			if (CMP_FLAG(i, IGNPAR)) {
				/* Ignore bad characters. */
				return (0);
			} else {
				/* Just print it. */
				goto parmrk;
			}
		}
	}

	/* Allow any character to perform a wakeup. */
	if (CMP_FLAG(i, IXANY)) {
		tp->t_flags &= ~TF_STOPPED;
		tp->t_termios.c_lflag &= ~FLUSHO;
	}

	/* Remove the top bit. */
	if (CMP_FLAG(i, ISTRIP))
		c &= ~0x80;

	/* Skip input processing when we want to print it literally. */
	if (tp->t_flags & TF_LITERAL) {
		tp->t_flags &= ~TF_LITERAL;
		quote = 1;
		goto processed;