Comment 27 for bug 1492621

I have this problem too - with gethostname(). I'm going to make a new DNS service and built a DNS resolver, which must run on localhost.

If I'm disconnected from eth0 and wlan0 and the computer is offline, Firefox doesn't even try to resolve hostnames (on Linux, but also on Windows), whereas nslookup actually does resolve them. I'm using Firefox, but now I suspect this being a problem of libc; and I don't want (but need) to run some virtual interface which is always-up.

I do need this feature, because there maybe services running on localhost - so they are also available in offline mode.