HAMMERIOC_SET_PSEUDOFS
if (ioctl(fd, HAMMERIOC_SET_PSEUDOFS, &pfs) != 0) {
if (ioctl(fd, HAMMERIOC_SET_PSEUDOFS, &pfs) < 0) {
if (ioctl(fd, HAMMERIOC_SET_PSEUDOFS, &pfs) == 0) {
case HAMMERIOC_SET_PSEUDOFS: