From 6a714e48586aa7f21d2eeef9195cee57c9ebaa60 Mon Sep 17 00:00:00 2001 From: Thorsten Kukuk Date: Fri, 16 Aug 2013 14:54:23 -0400 Subject: [PATCH 05/11] reload /etc/resolv.conf when it has changed if /etc/resolv.conf is updated, then make sure applications already running get the updated information. ripped from SuSE http://bugs.gentoo.org/177416 --- resolv/res_libc.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/resolv/res_libc.c b/resolv/res_libc.c index ee3fa21..f30b3a9 100644 --- a/resolv/res_libc.c +++ b/resolv/res_libc.c @@ -22,6 +22,7 @@ #include #include #include +#include /* The following bit is copied from res_data.c (where it is #ifdef'ed @@ -95,6 +96,20 @@ int __res_maybe_init (res_state resp, int preinit) { if (resp->options & RES_INIT) { + static time_t last_mtime, last_check; + time_t now; + struct stat statbuf; + + time (&now); + if (now != last_check) { + last_check = now; + if (stat (_PATH_RESCONF, &statbuf) == 0 && last_mtime != statbuf.st_mtime) { + last_mtime = statbuf.st_mtime; + atomicinclock (lock); + atomicinc (__res_initstamp); + atomicincunlock (lock); + } + } if (__res_initstamp != resp->_u._ext.initstamp) { if (resp->nscount > 0) __res_iclose (resp, true); -- 1.8.5.4