From: Charlie Brady <charlieb-supervision@budge.apana.org.au>
Cc: supervision@list.skarnet.org
Subject: Re: supervising postfix
Date: Sat, 16 Oct 2004 16:42:30 -0400 (EDT) [thread overview]
Message-ID: <Pine.LNX.4.44.0410161632500.4200-100000@e-smith.charlieb.ott.istop.com> (raw)
In-Reply-To: <Pine.LNX.4.44.0410161255440.4200-100000@e-smith.charlieb.ott.istop.com>
On Sat, 16 Oct 2004, Charlie Brady wrote:
> I don't see the logic in postfix interpreting this as a fatal error.
> Postfix wanted to be the process group leader. It already was. Where's
> the fatal problem?
I notice that elsewhere in postfix (in pipe_command.c) setsid failure is
not fatal:
...
/*
* Child. Run the child in a separate process group so that the
* parent can kill not just the child but also its offspring.
*/
case 0:
set_ugid(args.uid, args.gid);
if (setsid() < 0)
msg_warn("setsid failed: %m");
...
You could do the same in master.c:
...
/*
* Run in a separate process group, so that "postfix stop" can terminate
* all MTA processes cleanly. Give up if we can't separate from our
* parent process. We're not supposed to blow away the parent.
*/
if (setsid() == -1)
msg_fatal("unable to set session and process group ID: %m");
...
The comment of course is bogus, one wouldn't blow away the parent if
setsid() fails, since that implies the parent is already in a separate
process group.
BTW, don't expect to use multilog with postfix:
...
/*
* If started from a terminal, get rid of any tty association. This also
* means that all errors and warnings must go to the syslog daemon.
*/
for (fd = 0; fd < 3; fd++) {
(void) close(fd);
if (open("/dev/null", O_RDWR, 0) != fd)
msg_fatal("open /dev/null: %m");
}
...
The comment there is also bogus, since there is not test for being started
from a terminal.
---
Charlie
next prev parent reply other threads:[~2004-10-16 20:42 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-16 4:35 Vincent Danen
2004-10-16 19:11 ` Charlie Brady
2004-10-16 19:28 ` Vincent Danen
2004-10-16 20:11 ` Charlie Brady
2004-10-16 23:37 ` Vincent Danen
2004-10-17 1:38 ` Vincent Danen
2004-10-16 20:42 ` Charlie Brady [this message]
2004-11-01 21:45 ` Csillag Tamas
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