DS_GET_TUPLE_DATA
case DS_GET_TUPLE_DATA:
(ioctl(fd, DS_GET_TUPLE_DATA, arg) == 0) &&
if (ioctl(fd, DS_GET_TUPLE_DATA, arg) != 0) {
ioctl(fd, DS_GET_TUPLE_DATA, &arg);
ioctl(fd, DS_GET_TUPLE_DATA, &arg);