| #include <stdio.h> |
| #include <errno.h> |
| #include <sys/sem.h> |
| |
| union semun { |
| int val; /* Value for SETVAL */ |
| struct semid_ds *buf; /* Buffer for IPC_STAT, IPC_SET */ |
| unsigned short *array; /* Array for GETALL, SETALL */ |
| struct seminfo *__buf; /* Buffer for IPC_INFO |
| (Linux-specific) */ |
| }; |
| |
| int |
| main(void) |
| { |
| int rc, id; |
| union semun un; |
| struct semid_ds ds; |
| struct seminfo info; |
| |
| id = semget(IPC_PRIVATE, 1, 0600); |
| if (id < 0) |
| return 77; |
| printf("semget\\(IPC_PRIVATE, 1, 0600\\) += %d\n", id); |
| |
| un.buf = &ds; |
| if (semctl(id, 0, IPC_STAT, un)) |
| goto fail; |
| printf("semctl\\(%d, 0, (IPC_64\\|)?IPC_STAT, \\[?%p\\]?\\) += 0\n", |
| id, &ds); |
| |
| un.__buf = &info; |
| int max = semctl(0, 0, SEM_INFO, un); |
| if (max < 0) |
| goto fail; |
| printf("semctl\\(0, 0, (IPC_64\\|)?SEM_INFO, \\[?%p\\]?\\) += %d\n", |
| &info, max); |
| |
| un.buf = &ds; |
| rc = semctl(id, 0, SEM_STAT, un); |
| if (rc != id) { |
| /* |
| * In linux < v2.6.24-rc1 the first argument must be |
| * an index in the kernel's internal array. |
| */ |
| if (-1 != rc || EINVAL != errno) |
| goto fail; |
| printf("semctl\\(%d, 0, (IPC_64\\|)?SEM_STAT, \\[?%p\\]?\\)" |
| " += -1 EINVAL \\(Invalid argument\\)\n", id, &ds); |
| } else { |
| printf("semctl\\(%d, 0, (IPC_64\\|)?SEM_STAT, \\[?%p\\]?\\)" |
| " += %d\n", id, &ds, id); |
| } |
| |
| rc = 0; |
| done: |
| if (semctl(id, 0, IPC_RMID, 0) < 0) |
| return 1; |
| printf("semctl\\(%d, 0, (IPC_64\\|)?IPC_RMID, \\[?0\\]?\\) += 0\n", id); |
| return rc; |
| |
| fail: |
| rc = 1; |
| goto done; |
| } |