BSocket: add BSocket_SockFd

system/BSocket.c

@@ -1528,3 +1528,10 @@ BReactor * BSocket_Reactor (BSocket *bs)
     
     return bs->bsys;
 }
+
+int BSocket_SockFd (BSocket *bs)
+{
+    DebugObject_Access(&bs->d_obj);
+    
+    return bs->socket;
+}

system/BSocket.h

@@ -445,4 +445,12 @@ int BSocket_ConnectUnix (BSocket *bs, const char *path) WARN_UNUSED;
  */
 BReactor * BSocket_Reactor (BSocket *bs);
 
+/**
+ * Returns the underlying file descriptor of the socket.
+ * 
+ * @param bs the object
+ * @return file descriptor
+ */
+int BSocket_SockFd (BSocket *bs);
+
 #endif