RFD_RESERVED
if (class != RFD_RESERVED)
rfd = rfd_find_prev_class(tail, RFD_RESERVED);
while (rfd != NULL && class == RFD_RESERVED && rfd->rfd_class ==
RFD_RESERVED)
fd = rfd_open("/dev/null", 1, RFD_RESERVED, NULL, NULL,