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Hang the correct processes when no output/input available. PR kern/37603.

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From christos@.
This commit is contained in:
ad 2007-12-31 21:11:13 +00:00
parent 34de2dfb48
commit fe8a16b16c
1 changed files with 23 additions and 5 deletions
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28
sys/kern/tty.c
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@ -1,4 +1,4 @@
/* $NetBSD: tty.c,v 1.209 2007/12/26 16:01:37 ad Exp $ */
/* $NetBSD: tty.c,v 1.210 2007/12/31 21:11:13 ad Exp $ */
/*-
* Copyright (c) 1982, 1986, 1990, 1991, 1993
@ -37,7 +37,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: tty.c,v 1.209 2007/12/26 16:01:37 ad Exp $");
__KERNEL_RCSID(0, "$NetBSD: tty.c,v 1.210 2007/12/31 21:11:13 ad Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -843,7 +843,13 @@ ttioctl(struct tty *tp, u_long cmd, void *data, int flag, struct lwp *l)
while (isbackground(curproc, tp) &&
p->p_pgrp->pg_jobc && (p->p_sflag & PS_PPWAIT) == 0 &&
!sigismasked(l, SIGTTOU)) {
ttysig(tp, TTYSIG_PG1, SIGTTOU);
mutex_spin_exit(&tty_lock);
mutex_enter(&proclist_mutex);
pgsignal(p->p_pgrp, SIGTTOU, 1);
mutex_exit(&proclist_mutex);
mutex_spin_enter(&tty_lock);
error = ttysleep(tp, &lbolt, true, 0);
if (error) {
mutex_spin_exit(&tty_lock);
@ -1641,7 +1647,13 @@ ttread(struct tty *tp, struct uio *uio, int flag)
mutex_spin_exit(&tty_lock);
return (EIO);
}
ttysig(tp, TTYSIG_PG1, SIGTTIN);
mutex_spin_exit(&tty_lock);
mutex_enter(&proclist_mutex);
pgsignal(p->p_pgrp, SIGTTIN, 1);
mutex_exit(&proclist_mutex);
mutex_spin_enter(&tty_lock);
error = ttysleep(tp, &lbolt, true, 0);
mutex_spin_exit(&tty_lock);
if (error)
@ -1906,7 +1918,13 @@ ttwrite(struct tty *tp, struct uio *uio, int flag)
mutex_spin_exit(&tty_lock);
goto out;
}
ttysig(tp, TTYSIG_PG1, SIGTTOU);
mutex_spin_exit(&tty_lock);
mutex_enter(&proclist_mutex);
pgsignal(p->p_pgrp, SIGTTOU, 1);
mutex_exit(&proclist_mutex);
mutex_spin_enter(&tty_lock);
error = ttysleep(tp, &lbolt, true, 0);
mutex_spin_exit(&tty_lock);
if (error)