semget
if ((Sem_id[cnt] = semget(IPC_PRIVATE, 1, 0)) < 0)
if ((id = semget(k, 0, 0)) == -1)
semid = semget(key, nsem, semflg);
retVal = semget(IPC_PRIVATE, 1, IPC_CREAT);
int semget(key_t, int, int);
error = semget((key_t)a1, (int)a2, (int)a3);