fix #518, fix fd leak bug when fork. 2.0.200

@@ -336,6 +336,7 @@ Remark:
 
 ## History
 
+* v2.0, 2015-11-16, for [#518][bug #518] fix fd leak bug when fork. 2.0.200
 * v2.0, 2015-11-05, for [#511][bug #511] fix bug for restart thread. 2.0.199
 * v2.0, 2015-11-02, for [#515][bug #515] use srs_freepa and SrsAutoFreeA for array. 2.0.198
 * v2.0, 2015-10-28, for [ExoPlayer #828][exo #828], remove duration for live.
@@ -1203,6 +1204,7 @@ Winlin
 [bug #512]: https://github.com/ossrs/srs/issues/512
 [bug #515]: https://github.com/ossrs/srs/issues/515
 [bug #511]: https://github.com/ossrs/srs/issues/511
+[bug #518]: https://github.com/ossrs/srs/issues/518
 [bug #xxxxxxxxxx]: https://github.com/ossrs/srs/issues/xxxxxxxxxx
 
 [exo #828]: https://github.com/google/ExoPlayer/pull/828

@@ -1223,10 +1223,11 @@ void SrsServer::resample_kbps()
 int SrsServer::accept_client(SrsListenerType type, st_netfd_t client_stfd)
 {
     int ret = ERROR_SUCCESS;
+    
     int fd = st_netfd_fileno(client_stfd);
+    
     int max_connections = _srs_config->get_max_connections();
     if ((int)conns.size() >= max_connections) {
-        
         srs_error("exceed the max connections, drop client: "
             "clients=%d, max=%d, fd=%d", (int)conns.size(), max_connections, fd);
             
@@ -1234,20 +1235,26 @@ int SrsServer::accept_client(SrsListenerType type, st_netfd_t client_stfd)
         
         return ret;
     }
-    int val;
-    if ((val = fcntl(fd, F_GETFD, 0)) < 0) {
-        ret = ERROR_SYSTEM_PID_GET_FILE_INFO;
-        srs_error("fnctl F_GETFD error! fd=%d. ret=%#x", fd, ret);
-        srs_close_stfd(client_stfd);
-        return ret;
+    
+    // avoid fd leak when fork.
+    // @see https://github.com/ossrs/srs/issues/518
+    if (true) {
+        int val;
+        if ((val = fcntl(fd, F_GETFD, 0)) < 0) {
+            ret = ERROR_SYSTEM_PID_GET_FILE_INFO;
+            srs_error("fnctl F_GETFD error! fd=%d. ret=%#x", fd, ret);
+            srs_close_stfd(client_stfd);
+            return ret;
+        }
+        val |= FD_CLOEXEC;
+        if (fcntl(fd, F_SETFD, val) < 0) {
+            ret = ERROR_SYSTEM_PID_SET_FILE_INFO;
+            srs_error("fcntl F_SETFD error! fd=%d ret=%#x", fd, ret);
+            srs_close_stfd(client_stfd);
+            return ret;
+        }
     }
-    val |= FD_CLOEXEC;
-    if (fcntl(fd, F_SETFD, val) < 0) {
-        ret = ERROR_SYSTEM_PID_SET_FILE_INFO;
-        srs_error("fcntl F_SETFD error! fd=%d ret=%#x", fd, ret);
-        srs_close_stfd(client_stfd);
-        return ret;
-    } 
+    
     SrsConnection* conn = NULL;
     if (type == SrsListenerRtmpStream) {
         conn = new SrsRtmpConn(this, client_stfd);

@@ -31,7 +31,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 // current release version
 #define VERSION_MAJOR       2
 #define VERSION_MINOR       0
-#define VERSION_REVISION    199
+#define VERSION_REVISION    200
 
 // server info.
 #define RTMP_SIG_SRS_KEY "SRS"