Date: Fri, 11 Jul 2008 08:32:49 +0200 From: Willy Offermans <Willy@Offermans.Rompen.nl> To: Brooks Davis <brooks@freebsd.org> Cc: freebsd-stable@freebsd.org Subject: Re: dhclient and resolv.conf.sav Message-ID: <20080711063249.GB4382@wiz.vpn.offrom.nl> In-Reply-To: <20080710165741.GA12966@lor.one-eyed-alien.net> References: <20080710085234.GD38495@hugo10.ka.punkt.de> <20080710165741.GA12966@lor.one-eyed-alien.net>
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Dear FreeBSD friends, Is this behavior, related to dhclient and /etc/resolv.conf.sav, FreeBSD specific or is it a general feature of dhclient? I might have a use for it on my debian linux laptop. On Thu, Jul 10, 2008 at 11:57:41AM -0500, Brooks Davis wrote: > On Thu, Jul 10, 2008 at 10:52:35AM +0200, Patrick M. Hausen wrote: > > Hello, > > > > we have been bitten by something that obvoiusly > > is a feature, not a bug, but I do not quite understand > > the intentions and reasoning behind it. > > > > I have a host with manual interface and resolver configuration > > and an additional interface that should get it's IP address > > via DHCP. But only it's IP address and netmask, nothing else. > > > > The DHCP server used hands out only IP addresses/netmasks, > > no domain-name-servers, domain-name, etc. configured. > > > > Yet, if there happens to exist a /etc/resolv.conf.sav file, > > every renewal of the lease by dhclient overwrites the contents > > of /etc/resolv.conf with those of resolv.conf.sav. > > > > In my particular case the .sav file contained an internal > > nameserver that was used when I initially set up the host > > in the lab. This entry was of no use to the server after > > it had been deployed in our datacenter. > > > > Can anyone shed some light on the intended mechanism? > > Studying the dhclient-script was not too helpful, either. > > I suspect the theory is that you can have a static resolv.conf around > that gets installed when there isn't anything else to use. In practice, > I think it mostly causes problems. I'm somewhat tempted to remove the > creation of the file and add something like a resolv.conf.default in > it's place. > > -- Brooks -- Met vriendelijke groeten, With kind regards, Mit freundlichen Gruessen, De jrus wah, Willy ************************************* Dr. W.K. Offermans CAT Postdoctoral Fellow CAT Catalytic Center Institut für Technische und Makromolekulare Chemie RWTH Aachen Worringerweg 1, Raum 38C-150 D-52074 Aachen, Germany Phone: +49 241 80 28592 Home: +31 45 544 49 44 Mobile: +31 653 27 16 23 e-mail: Willy@Offermans.Rompen.nl e-mail: Willy.Offermans@CatalyticCenter.RWTH-Aachen.de Powered by .... (__) \\\'',) \/ \ ^ .\._/_) www.FreeBSD.org
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