atom feed16 messages in org.freebsd.freebsd-currentRe: suspend bug
FromSent OnAttachments
Bakul ShahJul 18, 2002 12:33 pm 
Bruce EvansJul 20, 2002 9:32 pm 
Bruce EvansJul 20, 2002 9:53 pm 
Bakul ShahJul 20, 2002 11:17 pm 
Julian ElischerJul 20, 2002 11:35 pm 
Julian ElischerJul 20, 2002 11:40 pm 
Andrey A. ChernovJul 21, 2002 1:32 am 
Bruce EvansJul 21, 2002 3:29 am 
Tim RobbinsJul 21, 2002 4:09 am 
David XuJul 21, 2002 4:21 am 
Andrey A. ChernovJul 21, 2002 6:32 am 
Andrey A. ChernovJul 21, 2002 5:24 pm 
Tim RobbinsJul 21, 2002 5:31 pm 
Julian ElischerJul 21, 2002 10:37 pm 
Bruce EvansJul 22, 2002 7:02 am 
Julian ElischerJul 23, 2002 12:18 pm 
Subject:Re: suspend bug
From:Julian Elischer (jul@elischer.org)
Date:Jul 21, 2002 10:37:49 pm
List:org.freebsd.freebsd-current

Hi David.. I've beenoffline this weekend.. off to bed now

will look at this tomorrow..

On Sun, 21 Jul 2002, David Xu wrote:

I knew the bug, is this patch works for you?

--- kern_sig.c.old Sun Jul 21 15:38:00 2002 +++ kern_sig.c Sun Jul 21 16:31:02 2002 @@ -1657,7 +1657,7 @@ #endif break; /* == ignore */ } -#if 0 + /* * If there is a pending stop signal to process * with default action, stop here, @@ -1679,16 +1679,10 @@ PROC_UNLOCK(p->p_pptr); mtx_lock_spin(&sched_lock); stop(p); - PROC_UNLOCK(p); - DROP_GIANT(); - p->p_stats->p_ru.ru_nivcsw++; - mi_switch(); mtx_unlock_spin(&sched_lock); - PICKUP_GIANT(); - PROC_LOCK(p); break; } else -#endif + if (prop & SA_IGNORE) { /* * Except for SIGCONT, shouldn't get here.

----- Original Message ----- From: "Tim Robbins" <tj@FreeBSD.ORG> To: <curr@FreeBSD.ORG> Sent: Sunday, July 21, 2002 7:09 PM Subject: Re: suspend bug

On Sun, Jul 21, 2002 at 08:30:14PM +1000, Bruce Evans wrote:

On Sun, 21 Jul 2002, Andrey A. Chernov wrote:

On Sun, Jul 21, 2002 at 14:54:00 +1000, Bruce Evans wrote:

The bug is actually in su. It happens with a pre-KSEIII kernel. Backing out rev.1.54 of su.c (which was apparently supposed to fix a related bug tcsh's fg command) fixes it.

Feel free to back it out when kernel will be fixed. As workaround it is more useful at this moment, since "suspend + fg" it fixes is more common thing, then "stop $$ + fg"

Er, there is no kernel bug here AFAIK. I don't really understand rev.1.54 of su.c. Is it related to the PAM brokenness that is worked around in rev.1.53?

Suspending chpass and vipw does not work correctly (like it does in 4.6.1), either:

$ chpass #Changing user information for tim. *snip* *^Z* [1] + Stopped chpass $ fg chpass [1] + Stopped chpass $ fg chpass #Changing user information for tim.

I don't know if this is KSE-related or was introduced in the recent modifications to src/lib/libutil/pw_util.c. crontab -e behaves correctly when suspended.

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David Xu