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Date:      Tue, 24 Oct 2006 16:25:57 +0100
From:      Joe Holden <joe@joeholden.co.uk>
To:        Brooks Davis <brooks@one-eyed-alien.net>
Cc:        Doug Barton <dougb@freebsd.org>, "Andrey V. Elsukov" <bu7cher@yandex.ru>, Harti Brandt <harti@freebsd.org>, net@freebsd.org
Subject:   Re: Instructing dhclient to set hostname of client
Message-ID:  <453E3085.7040003@joeholden.co.uk>
In-Reply-To: <20061024143940.GA52335@lor.one-eyed-alien.net>
References:  <453C0E42.4010604@joeholden.co.uk> <453C5386.5080102@FreeBSD.org>	<453C5979.4050408@yandex.ru> <453D35AB.3000908@joeholden.co.uk>	<20061024091523.G45134@knop-beagle.kn.op.dlr.de> <20061024143940.GA52335@lor.one-eyed-alien.net>

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Brooks Davis wrote:
> On Tue, Oct 24, 2006 at 09:16:07AM +0200, Harti Brandt wrote:
>> On Mon, 23 Oct 2006, Joe Holden wrote:
>>
>> JH>Andrey V. Elsukov wrote:
>> JH>> Doug Barton wrote:
>> JH>>> If you're talking about a laptop where you're not sure what the DHCP
>> JH>>> server is going to send you, then I have this in /etc/rc.local:
>> JH>> 
>> JH>> Hi, Doug.
>> JH>> 
>> JH>> What you think about adding a new feature to dhclient - Alternate IP
>> JH>> Configuration. This configuration can be specified in dhclient.conf
>> JH>> and take effect when a DHCP server not respond. MS Windows have a
>> JH>> similar feature.
>> JH>> 
>> JH>Really I was hoping dhclient would have this sort of functionality where
>> JH>it would resolve the ip given and set that as hostname, as as far as im
>> JH>aware, isc-dhcpd will not send hostnames?
>>
>> Sure it does. On my machines I set hostname to "" in rc.conf and let 
>> dhclient set it. Works fine.
> 
> Once upon a time I implemented some code to add a default_hostname
> variable to rc.conf which was then used by the startup scripts and
> dhclient-script to allow the local network to override the name if
> desired while insuring that the system had a name at all times (required
> for laptop use).  I'd take patches to do this.
> 
> -- Brooks
> 
> P.S. hacking this into rc.local won't work longterm because addresses
> will be assigned in a totally different context.

I wrote an rc.d script called updatehost that does this, its called
after other net scripts, and basically gets the ip from $interface (set
by updatehost_flags="blah0" in rc.conf, and resolves that, seems to
work, a dirty hack but it does the trick.

Thanks,
Joe



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