DESIOCBLOCK
{ (uint_t)DESIOCBLOCK, "DESIOCBLOCK", "desparams" }, /* 6 */
res = ioctl(g_desfd, (int)DESIOCBLOCK, (char *)desp);
res = ioctl(g_desfd, DESIOCBLOCK, (char *)desp);
res = ioctl(g_desfd, DESIOCBLOCK, (char *)desp);