tube_handle_write
tube_handle_write(struct comm_point* c, void* arg, int error,
tube_handle_write(struct comm_point* ATTR_UNUSED(c), void* ATTR_UNUSED(arg),
tube_handle_write(struct comm_point* c, void* arg, int error,
tube_handle_write(struct comm_point* ATTR_UNUSED(c), void* ATTR_UNUSED(arg),