Re: [GIT PATCH] I2C and W1 bugfixes for 2.6.12-rc2

> On Tue, Apr 19, 2005 at 03:00:04PM -0700, Linus Torvalds wrote:
> > 
> > 
> > On Tue, 19 Apr 2005, Greg KH wrote:
> > > 
> > > It looks like your domain name isn't set up properly for your box (which
> > > is why it worked for you, but not me before, causing that patch).
> > 
> > No, I think it's a bug in your domainname changes. I don't think you
> > should do the domainname at all if the hostname has a dot in it.
> > 
> > Most machines I have access to (and that includes machines that are
> > professionally maintained, not just my own cruddy setup) says "(none)" to
> > domainname and have the full hostname in hostname.
> > 
> > And even the ones that use domainname tend to not have a fully qualified 
> > DNS domain there. You need to use dnsdomainname to get that, and I don't 
> > even know how to do it with standard libc.
> > 
> > So how about something like this?
> > 
> > (Somebody who actually knows how these things should be done - please feel 
> > free to pipe up).
> 
> The glibc documentation blows for this, but what getdomainname comes
> from uname(2), not from any DNS-related configuration.  Debian only
> ever sets this if you're using NIS.

> There's no real great way to get the current hostname; a lot of
> applications do a reverse DNS lookup on the primary network interface,
> with appropriate handwaving to define primary.
> 
> Easiest might be to punt to hostname --fqdn, or an equivalent to its
> algorithm - which appears to be fetch the hostname from uname, do a DNS
> lookup on that, and a reverse DNS lookup on the result.