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uClibc: make res_init() thread safe 

Signed-off-by: Jiri Slachta <slachta@cesnet.cz>

SVN-Revision: 39178
lede-17.01
Felix Fietkau 2013-12-28 15:06:04 +00:00
parent 8cabffaa3b
commit c4b013f00b
1 changed files with 55 additions and 0 deletions
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55
toolchain/uClibc/patches-0.9.33.2/136-inet_make_res_init_thread_safe.patch Normal file
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@ -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 */
--
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