#include #include #include int main(void) { int rc, id; struct shmid_ds ds; id = shmget(IPC_PRIVATE, 1, 0600); if (id < 0) return 77; printf("shmget\\(IPC_PRIVATE, 1, 0600\\) += %d\n", id); if (shmctl(id, IPC_STAT, &ds)) goto fail; printf("shmctl\\(%d, (IPC_64\\|)?IPC_STAT, %p\\) += 0\n", id, &ds); int max = shmctl(0, SHM_INFO, &ds); if (max < 0) goto fail; printf("shmctl\\(0, (IPC_64\\|)?SHM_INFO, %p\\) += %d\n", &ds, max); rc = shmctl(id, SHM_STAT, &ds); 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("shmctl\\(%d, (IPC_64\\|)?SHM_STAT, %p\\) += -1 EINVAL \\(Invalid argument\\)\n", id, &ds); } else { printf("shmctl\\(%d, (IPC_64\\|)?SHM_STAT, %p\\) += %d\n", id, &ds, id); } rc = 0; done: if (shmctl(id, IPC_RMID, 0) < 0) return 1; printf("shmctl\\(%d, (IPC_64\\|)?IPC_RMID, 0\\) += 0\n", id); return rc; fail: rc = 1; goto done; }