News Group Posts

oss462a cron sd cron luid

Newsgroups: comp.unix.sco.misc
From: Bela Lubkin <belal@sco.com>
Subject: Re: oss642a
Cc: kamalm@sco.com
Date: Thu, 20 Sep 2001 08:47:38 GMT
Message-ID: <20010920014738.E5148@mammoth.ca.sco.com> 
References: <20010918005127.H3931@jpradley.jpr.com>
<9obmk1$c1a$1@suaar1aa.prod.compuserve.com> 

Bob Bailin wrote:

> I'd just like to report that after installing OSS642a on 5.0.5 (all
> patches), I was told that Monday's nightly backup didn't run (tape wasn't
> automatically ejected). Upon checking root's mail, I noticed 172 msgs (so
> far) from cron with:
> 
> cron: can't set login UID.
> 
> It seems that though the custom install script went to the trouble of
> killing cron and restarting it, it neglected to restart it using the sd
> command (see TA #106462 which seems to apply to OSR5, even though it's not
> stated).

Thanks for the report, Bob.

You are correct, the ccs script should use `sd cron` to restart cron.
This only makes a difference on systems where the kernel parameter
SECLUID is set to 1.  Apparently the people who wrote and tested oss642a
didn't try it on such a system.  Yours may be that way because you chose
the "high" set of security defaults; most people choose "traditional",
which sets SECLUID=0.

Although there's a simple workaround (stop and properly restart cron;
or, crudely, reboot after installing oss642a), I think we should fix
this.  I will recommend internally that we issue an oss642b.

(I might argue that the bug is in /etc/rc2.d/P75cron aka
/etc/init.d/cron: _it_ should use `sd cron` so that admins who manually
run rc scripts don't have to think about this madness.)

>Bela<
 

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