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Only do software flow control if IXOFF is set. Also fix hardware flow control 

case in ttyblock().
This commit is contained in:
mycroft 1995-06-04 14:01:37 +00:00
parent 3cd36c72ef
commit 3e6f699a75
1 changed files with 7 additions and 5 deletions
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12
sys/kern/tty.c
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@ -1,4 +1,4 @@
/* $NetBSD: tty.c,v 1.59 1995/06/04 12:57:52 mycroft Exp $ */
/* $NetBSD: tty.c,v 1.60 1995/06/04 14:01:37 mycroft Exp $ */
/*-
* Copyright (c) 1982, 1986, 1990, 1991, 1993
@ -1045,9 +1045,10 @@ ttyblock(tp)
*/
if (total >= TTYHOG / 2 &&
!ISSET(tp->t_state, TS_TBLOCK) &&
!ISSET(tp->t_lflag, ICANON) || tp->t_canq.c_cc > 0 &&
tp->t_cc[VSTOP] != _POSIX_VDISABLE) {
if (putc(tp->t_cc[VSTOP], &tp->t_outq) == 0) {
!ISSET(tp->t_lflag, ICANON) || tp->t_canq.c_cc > 0) {
if (ISSET(tp->t_iflag, IXOFF) &&
tp->t_cc[VSTOP] != _POSIX_VDISABLE &&
putc(tp->t_cc[VSTOP], &tp->t_outq) == 0) {
SET(tp->t_state, TS_TBLOCK);
ttstart(tp);
}
@ -1372,7 +1373,8 @@ read:
*/
s = spltty();
if (ISSET(tp->t_state, TS_TBLOCK) && tp->t_rawq.c_cc < TTYHOG/5) {
if (cc[VSTART] != _POSIX_VDISABLE &&
if (ISSET(tp->t_iflag, IXOFF) &&
cc[VSTART] != _POSIX_VDISABLE &&
putc(cc[VSTART], &tp->t_outq) == 0) {
CLR(tp->t_state, TS_TBLOCK);
ttstart(tp);