[CFR] reflect resolv.conf update to running application

[Hajimu UMEMOTO]

Hi,

>>>>> On Fri, 26 Aug 2005 20:29:39 -0400 (EDT)
>>>>> "Matthew N. Dodd" <mdodd at FreeBSD.ORG> said:

mdodd> On Sat, 20 Aug 2005, Hajimu UMEMOTO wrote:
> Our resolver reads resolv.conf once, and never re-read it.  Recent 
> OpenBSD changed to re-read resolv.conf when it is updated.  I believe it 
> is useful specially for mobile environment.

mdodd> The more useful solution is to run a local caching nameserver that 
mdodd> forwards to the DHCP or location specific nameservers.

I was using this solution for several years, but I prefered to use
totd.  Since I thought this was overkill, I mode the patch.

mdodd> I've got modifications to dhclient-script and a Makefile in /etc/namedb/ 
mdodd> that implement this behavior.  I'll clean it up for public consumption if 
mdodd> others are interested.

Not only dhclient updates resolv.conf, but ppp, mpd and perhaps others
do.  I'm using dhclient and ppp on my laptops.  Sometimes, I use
DHCPv6, too.  So, I need such setting for each applications.  It is
messy to setup a laptop.

Sincerely,

--
Hajimu UMEMOTO @ Internet Mutual Aid Society Yokohama, Japan
ume at mahoroba.org  ume@{,jp.}FreeBSD.org
http://www.imasy.org/~ume/