baselayout-1.12.0_pre6 will now feature resolv.conf merging - basically taking the best information from active interfaces that we or dhcp has setup and merging it into one. For example
nameserver 184.108.40.206 nameserver 220.127.116.11 domain foo
nameserver 18.104.22.168 nameserver 22.214.171.124 search wibble wobble
This turns into a merged resolv.conf of
nameserver 126.96.36.199 nameserver 188.8.131.52 nameserver 184.108.40.206 search foo wibble wobble
However, if eth1 has a lower metric than eth0 (eth0 wireless, eth1 wired for example) then it becomes
nameserver 220.127.116.11 nameserver 18.104.22.168 nameserver 22.214.171.124 search wibble wobble foo
Duplicates are also removed 😃 Incase you're wondering why not all the information was taken across, well the answer is due to libc limitations. If you consult the resolv.conf man page then you'll discover that you're limited to 3 nameservers and 6 search domains. Great!
It's a trivial excercise to change the numbers we limit too, but they'll have no effect with current libc. But if anyone uses a libc/resolver with greater limits I'm happy to accept patches 😛
As it took a lot less time todo than I first thought, I'll merge ntp.conf information too - hopefully in time for pre6 8) EDIT: ntp.conf merging took 10 minutes and it is in 😄
If anyone used the resolvconf package which Debian uses, then this does a similar thing but transparently and without the need for a daemon.
Fans of the baselayout-1.12.0_pre releases so far will be pleased to know that we now default RC_AUTO_INTERFACE to no 😉