SHM_HUGETLB
if (shmflg & SHM_HUGETLB) {
shmid = shmget(2, LENGTH, SHM_HUGETLB | IPC_CREAT | SHM_R | SHM_W);
*shmid = shmget(2, size, SHM_HUGETLB | IPC_CREAT | SHM_R | SHM_W);
test_shmget(ps, SHM_HUGETLB | arg);
test_shmget(default_hps, SHM_HUGETLB);
SHM_HUGETLB | IPC_CREAT | SHM_R | SHM_W);
SHM_HUGETLB | IPC_CREAT | SHM_R | SHM_W);