2011/3/11 Anton Maksimenkov <anton...@gmail.com>:
>> If some process can catch COM port in a way that noone can use the
>> port and noone can kill that process - it is wrong situation.
I think this would be a little bit better:
--- /usr/origsrc/sys/kern/tty.c Mon Oct 11 22:20:15 2010
+++ /usr/src/sys/kern/tty.c Fri Mar 11 22:57:48 2011
@@ -1188,7 +1188,8 @@
int
ttywait(struct tty *tp)
{
- int error, s;
+ int error, s, tm;
+ struct proc *p = curproc;
error = 0;
s = spltty();
@@ -1200,8 +1201,15 @@
(ISSET(tp->t_state, TS_CARR_ON) || ISSET(tp->t_cflag,
CLOCAL))
&& tp->t_oproc) {
SET(tp->t_state, TS_ASLEEP);
- error = ttysleep(tp, &tp->t_outq, TTOPRI | PCATCH,
ttyout, 0);
+ if (p->p_flag & P_WEXIT)
+ tm = 100;
+ else
+ tm = 0;
+ error = ttysleep(tp, &tp->t_outq, TTOPRI | PCATCH,
ttyout, tm);
if (error)
+ break;
+ /* If the process exiting we have to exit */
+ if (p->p_flag & P_WEXIT)
break;
} else
break;
--
antonvm
