local-dynamic-resolvconf

Gbp-Pq: Topic any
Gbp-Pq: Name local-dynamic-resolvconf.diff

diff --git a/resolv/res_libc.c b/resolv/res_libc.c
index a4b376f15b0b0e9830cc08b8212a71da4bb10684..cc01898d8c7dfac8832d85d1490ed086c466aadd 100644 (file)
--- a/resolv/res_libc.c
+++ b/resolv/res_libc.c
@@ -25,7 +25,9 @@
 #include <arpa/nameser.h>
 #include <resolv.h>
 #include <libc-lock.h>
+#include <sys/stat.h>
 
+__libc_lock_define_initialized (static, lock);
 extern unsigned long long int __res_initstamp attribute_hidden;
 /* We have atomic increment operations on 64-bit platforms.  */
 #if __WORDSIZE == 64
@@ -33,7 +35,6 @@ extern unsigned long long int __res_initstamp attribute_hidden;
 # 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
@@ -92,7 +93,18 @@ res_init(void) {
 int
 __res_maybe_init (res_state resp, int preinit)
 {
+       static time_t last_mtime;
+       struct stat statbuf;
+       int ret;
+
        if (resp->options & RES_INIT) {
+               ret = stat (_PATH_RESCONF, &statbuf);
+               __libc_lock_lock (lock);
+               if ((ret == 0) && (last_mtime != statbuf.st_mtime)) {
+                       last_mtime = statbuf.st_mtime;
+                       atomicinc (__res_initstamp);
+               }
+               __libc_lock_unlock (lock);
                if (__res_initstamp != resp->_u._ext.initstamp) {
                        if (resp->nscount > 0)
                                __res_iclose (resp, true);