Subject: postfix and fork errors in .forward/procmail
To: None <email@example.com>
From: Greg Troxel <firstname.lastname@example.org>
Date: 10/17/2006 12:00:09
I'm running pretty-much current on i386 with procmail and postfix from
procmail-3.22nb2 Local mail delivery agent
postfix-2.3.3 Postfix SMTP server and tools
Someone got a bounce and I found this in the logs:
Oct 17 09:16:14 fnord postfix/local: 8D8825283: to=3D<email@example.com=
>, relay=3Dlocal, delay=3D8.7, delays=3D8.6/0.01/0/0.04, dsn=3D5.3.0, statu=
s=3Dbounced (Command died with status 2: "/usr/pkg/bin/procmail || exit 75=
". Command output: Cannot vfork )
Here is my .forward:
"|/usr/pkg/bin/procmail || exit 75"
I don't really understand why my system got into a 'cannot vfork' mode
(it seems to occasionally, even though I don't seem up against
per-user resource limits, global # processes, open files, or running
out of RAM/swap). I am running gnome though, and have found multiple
copies of some daemons.
I looked in the postfix source and found that it seems to hit this in
sp =3D sys_exits_detail(WEXITSTATUS(wait_status));
log_len ? log_buf : sp->text,
"Command died with status %d: \"%s\"%s%s",
log_len ? ". Command output: " : "", log_buf);
So I think it's forking /bin/sh to run the "procmail || exit 75"
compound command, and /bin/sh can't fork. This turns into 550 via
sys_exits_fake. It seems that random non-understood errors ought to
be 4xx. I haven't looked in the in-tree postfix.
Greg Troxel <firstname.lastname@example.org>
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