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authorFlorian Weimer <fweimer@redhat.com>2017-07-03 21:06:23 +0200
committerFlorian Weimer <fweimer@redhat.com>2017-07-03 21:06:23 +0200
commitaef16cc8a4c670036d45590877d411a97f01e0cd (patch)
tree4403f1962170ce92087a6e1af62dbb92e15d27f6 /resolv/res_libc.c
parenta1c4eb8794e789b5055d7ceb13b2b3231abf5e26 (diff)
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resolv: Automatically reload a changed /etc/resolv.conf file [BZ #984]
This commit enhances the stub resolver to reload the configuration in the per-thread _res object if the /etc/resolv.conf file has changed. The resolver checks whether the application has modified _res and will not overwrite the _res object in that case. The struct resolv_context mechanism is used to check the configuration file only once per name lookup.
Diffstat (limited to 'resolv/res_libc.c')
-rw-r--r--resolv/res_libc.c18
1 files changed, 0 insertions, 18 deletions
diff --git a/resolv/res_libc.c b/resolv/res_libc.c
index 5066983ccf..9f2d3c3bd4 100644
--- a/resolv/res_libc.c
+++ b/resolv/res_libc.c
@@ -42,18 +42,6 @@
#include <libc-lock.h>
#include <resolv-internal.h>
-/* We have atomic increment operations on 64-bit platforms. */
-#if __WORDSIZE == 64
-# define atomicinclock(lock) (void) 0
-# define atomicincunlock(lock) (void) 0
-# define atomicinc(var) catomic_increment (&(var))
-#else
-__libc_lock_define_initialized (static, lock);
-# define atomicinclock(lock) __libc_lock_lock (lock)
-# define atomicincunlock(lock) __libc_lock_unlock (lock)
-# define atomicinc(var) ++var
-#endif
-
int
res_init (void)
{
@@ -90,12 +78,6 @@ res_init (void)
if (!_res.id)
_res.id = res_randomid ();
- atomicinclock (lock);
- /* Request all threads to re-initialize their resolver states,
- resolv.conf might have changed. */
- atomicinc (__res_initstamp);
- atomicincunlock (lock);
-
return __res_vinit (&_res, 1);
}