uClibc: make res_init() thread safe

Signed-off-by: Jiri Slachta <slachta@cesnet.cz>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39178 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/toolchain/uClibc/patches-0.9.33.2/136-inet_make_res_init_thread_safe.patch b/toolchain/uClibc/patches-0.9.33.2/136-inet_make_res_init_thread_safe.patch
new file mode 100644 (file)
index 0000000..e23b083
--- /dev/null
+++ b/toolchain/uClibc/patches-0.9.33.2/136-inet_make_res_init_thread_safe.patch
@@ -0,0 +1,55 @@
+--- a/libc/inet/resolv.c
++++ b/libc/inet/resolv.c
+@@ -3432,6 +3432,7 @@ static void res_sync_func(void)
+        */
+ }
+ 
++/* has to be called under __resolv_lock */
+ static int
+ __res_vinit(res_state rp, int preinit)
+ {
+@@ -3440,7 +3441,6 @@ __res_vinit(res_state rp, int preinit)
+       int m = 0;
+ #endif
+ 
+-      __UCLIBC_MUTEX_LOCK(__resolv_lock);
+       __close_nameservers();
+       __open_nameservers();
+ 
+@@ -3532,7 +3532,6 @@ __res_vinit(res_state rp, int preinit)
+ 
+       rp->options |= RES_INIT;
+ 
+-      __UCLIBC_MUTEX_UNLOCK(__resolv_lock);
+       return 0;
+ }
+ 
+@@ -3582,11 +3582,11 @@ res_init(void)
+       if (!_res.id)
+               _res.id = res_randomid();
+ 
+-      __UCLIBC_MUTEX_UNLOCK(__resolv_lock);
+-
+       __res_vinit(&_res, 1);
+       __res_sync = res_sync_func;
+ 
++      __UCLIBC_MUTEX_UNLOCK(__resolv_lock);
++
+       return 0;
+ }
+ libc_hidden_def(res_init)
+@@ -3687,7 +3687,11 @@ struct __res_state *__resp = &_res;
+ int
+ res_ninit(res_state statp)
+ {
+-      return __res_vinit(statp, 0);
++      int ret;
++      __UCLIBC_MUTEX_LOCK(__resolv_lock);
++      ret = __res_vinit(statp, 0);
++      __UCLIBC_MUTEX_UNLOCK(__resolv_lock);
++      return ret;
+ }
+ 
+ #endif /* L_res_init */
+--
+cgit v0.9.1