I am a maintainer of a custom Linux distro for my companies products
(MIPS based HPC platform). I am upgrading the entire system from
gcc-3.4.3/glibc-2.3.3 to gcc-4.2/glibc-2.4 and I have run into a quirk
with telnet. I'm not sure if this is a bug or a new feature I don't
understand. It works as expected in glibc-2.3.3.
Telnet calls getnaminfo with the following line of code:
I seems to not matter what registerd_host_only is set to (it is normally
0), if I do not have a name server configured, I get an error return
value (EAI_AGAIN). I can work around it with a hosts line in
hosts: files dns [NOTFOUND=success]
Maybe I am misinterpretting the NI_NAMEREQD flag. the man page says:
If set, then a error is returned if the hostname cannot be looked
So what happens if NI_NAMEREQD is not set? My logic inverts this as:
If not set, then a error is not returned if the hostname cannot be looked
But that is not what is happening. If a nameserver is not found
(without the [NOTFOUND=success] in nsswitch.conf), getnameinfo returns
EAI_AGAIN. Seems redundant.
Can someone enlighten me on the correct way to handle this?