request = _IOC_NOTYPE (request);
symbol_set_define (_hurd_ioctl_handler_lists)/* Look up REQUEST in the set of handlers.  */ioctl_handler_t_hurd_lookup_ioctl_handler (int request){  void *const *ptr;  const struct ioctl_handler *h;  for (ptr = symbol_set_first_element (_hurd_ioctl_handler_lists);       !symbol_set_end_p (_hurd_ioctl_handler_lists, ptr);       ++ptr)    for (h = *ptr; h != NULL; h = h->next)      if (request >= h->first_request && request <= h->last_request)	return h->handler;  return NULL;}