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From: "Gregg Howe" <gregg@astronumerics.com>
Newsgroups: gmane.comp.sysutils.supervision.general
Subject: Re: dnscache runs under daemontools, unable to bind (access denied) using runit
Date: Fri, 20 May 2005 09:03:31 -0700
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----- Original Message ----- 
From: "Charles M. Gerungan" <charles@nednieuws.com>
To: <supervision@list.skarnet.org>
Sent: Friday, May 20, 2005 5:04 AM
Subject: dnscache runs under daemontools, unable to bind
(access denied) using runit


> This starts up dnscache and it responds to queries:
>
> # cat run.daemontools
> #!/bin/sh
> exec 2>&1
> exec <seed
> exec envdir ./env sh -c '
>    exec envuidgid Gdnscache softlimit -o250 -d
"$DATALIMIT" /usr/
> local/bin/dnscache
> '
>
> This does not start up (an adapted version of
http://www.skarnet.org:
> 80/lists/archive.cgi?2:msp:1046:midfmaimamejgmijfagg -- 
the content
> of the env dir wasn't given so I hope I interpreted the
manual
> correctly):
>
> # cat run
> #!/bin/sh
> exec 2>&1
> exec <seed
> exec chpst -v -u Gdnscache:Gnofiles -e ./env -o 250
/usr/local/bin/
> dnscache
>
> The error I'm getting when invoking:
>
> # ./run
> dnscache: fatal: unable to bind UDP socket: access denied
>
>
> Why am I getting the error and how do I solve it?
>
> -- 
> Regards, Charles.


Charles--

The "-u" option in chpst changes dnscache to an unprivileged
user before it executes, so it isn't able to bind the UPD
socket.  If you use "-U" instead, dnscache will be able to
complete this before it changes to Gdnscache.

Gregg