Instructing dhclient to set hostname of client

[Joe Holden]

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