bsd/kern/tty_ptmx.c

701 		if (tp->t_canq.c_cc == 0) {
712 		while (tp->t_canq.c_cc > 1 && uio_resid(uio) > 0) {
718 			cc = min(cc, tp->t_canq.c_cc - 1);
719 			cc = q_to_b(&tp->t_canq, (u_char *)buf, cc);
724 		if (tp->t_canq.c_cc == 1)
725 			(void) getc(&tp->t_canq);
726 		if (tp->t_canq.c_cc)
1028 	nread = tp->t_canq.c_cc;
1128 			    if (tp->t_canq.c_cc == 0) {
1133 			    retval = (TTYHOG - 2) - (tp->t_rawq.c_cc + tp->t_canq.c_cc);
1137 			    if (tp->t_canq.c_cc == 0 && (tp->t_lflag&ICANON)) {
1185 		if (tp->t_canq.c_cc)
1188 		       tp->t_canq.c_cc < TTYHOG - 1) {
1191 				cc = min(cc, TTYHOG - 1 - tp->t_canq.c_cc);
1205 				cc = b_to_q((u_char *)cp, cc, &tp->t_canq);
1220 		(void) putc(0, &tp->t_canq);
1241 			if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 &&
1242 			   (tp->t_canq.c_cc > 0 || !(tp->t_lflag&ICANON))) {