From owner-freebsd-hackers@FreeBSD.ORG  Mon Oct 27 08:39:46 2003
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Date: Mon, 27 Oct 2003 17:39:33 +0100
From: Oliver Eikemeier <eikemeier@fillmore-labs.com>
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To: Dan Langille <dan@langille.org>
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cc: freebsd-hackers@freebsd.org
Subject: Re: non-root process and PID files
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Dan Langille wrote:

> If a process starts up and does a setuid, should it be writing the 
> PID file before or after the setuid?
> 
> Two methods exists AFAIK:
> 
> 1 - write your PID immediately, and the file is chown root:wheel
> 2 - write your PID to /var/run/myapp/myapp.pid where /var/run/myapp/
>     is chown myapp:myapp
> 
> Of the two, I think #1 is cleaner as it does not require another 
> directory with special permissions.

You may have problems removing the file on exit, though.