if ((memid = shmget(IPC_PRIVATE, memreq + sizeof(CtrlBlk_T), 0660)) == -1) { fprintf(stderr, "%s: shmget failed to allocate %ld bytes.\n" "Insufficient memory or absent SYSV IPC " "support?\n", argv[0], memreq); exit(-1); } data = (char *)shmat(memid, (char *)0, 0); shmctl(memid, IPC_RMID, NULL); /* Make shared * memory transient */