Sources Bugzilla – Full Text Bug Listing
|Summary:||no fallback to nameserver 0.0.0.0 if /etc/resolv.conf is missing|
|Product:||glibc||Reporter:||Aurelien Jarno <aurelien>|
|Component:||libc||Assignee:||Ulrich Drepper <drepper.fsp>|
Patch to fix the problem
Description Aurelien Jarno 2009-10-26 17:38:25 UTC
Starting with glibc 2.10, there is no fallback to nameserver 0.0.0.0 anymore if /etc/resolv.conf is missing. This is due to this change: 2008-12-02 Ulrich Drepper <firstname.lastname@example.org> * resolv/res_init.c (__res_vinit): Initialize nscount to zero. This value should be set back to 1 so that the following code is actually useful: #ifdef USELOOPBACK statp->nsaddr.sin_addr = inet_makeaddr(IN_LOOPBACKNET, 1); #else statp->nsaddr.sin_addr.s_addr = INADDR_ANY; #endif statp->nsaddr.sin_family = AF_INET; statp->nsaddr.sin_port = htons(NAMESERVER_PORT);
Comment 1 Aurelien Jarno 2009-10-26 17:38:48 UTC
Created attachment 4322 [details] Patch to fix the problem
Comment 2 Aurelien Jarno 2009-11-08 18:41:44 UTC
Created attachment 4369 [details] New patch The previous patch does not work in case /etc/resolv.conf exists, but does not contain a nameserver entry. This new patch also takes that into account.
Comment 3 Petr Baudis 2009-11-09 16:38:06 UTC
Comment 4 Petr Baudis 2009-11-20 08:28:19 UTC
Created attachment 4402 [details] alternative patch Oops, I haven't noticed you already implemented a fix; anyway, here's what I've done independently, somewhat simpler patch. YMMV.
Comment 5 Ulrich Drepper 2010-08-25 14:48:07 UTC
I checked in a different patch.
Comment 6 Aurelien Jarno 2010-09-02 17:55:04 UTC
(In reply to comment #5) > I checked in a different patch. ... but broken what. You forget to set statp->nscount to 1, so it doesn't work.
Comment 7 Petr Baudis 2010-09-14 17:04:19 UTC
Fixed in Git now for good, hopefully.