1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
#include <sys/ipc.h>
#include <sys/sem.h>
#include <sys/msg.h>
#include "test.h"
int main() {
int id = semget(IPC_PRIVATE, 1, IPC_CREAT | 0666);
if (id < 0) {
perror("semget failed");
return 1;
}
struct semid_ds buf;
int ret = semctl(id, 0, IPC_STAT, &buf);
if (ret < 0) {
perror("semctl IPC_STAT failed");
} else {
printf("semctl IPC_STAT succeeded\n");
}
semctl(id, 0, IPC_RMID);
printf("sizeof(msginfo) = %zu\n", sizeof(struct msginfo));
ASSERT(32, sizeof(struct msginfo));
printf("msgmax offset = %zu\n", offsetof(struct msginfo, msgmax));
ASSERT(8, offsetof(struct msginfo, msgmax) );
printf("msgmnb offset = %zu\n", offsetof(struct msginfo, msgmnb));
ASSERT(12, offsetof(struct msginfo, msgmnb));
printf("msgtql offset = %zu\n", offsetof(struct msginfo, msgtql));
ASSERT(24, offsetof(struct msginfo, msgtql));
return 0;
}
|
