+XBT_PUBLIC(msg_error_t) MSG_file_move (msg_file_t fd, msg_host_t dest, char* mount, char* fullname);
+XBT_PUBLIC(msg_error_t) MSG_file_seek (msg_file_t fd, sg_storage_size_t offset, int whence);
+XBT_PUBLIC(msg_error_t) MSG_file_rename (msg_file_t fd, char* new_name);