Subversion Repositories or1k

#include <stdio.h>

#include <sys/types.h>

#include <sys/ipc.h>

#include <sys/sem.h>

int main(void)

{

    int k, r;

    union semun {

        int val;

        struct semid_ds *buf;

        unsigned short int *array;

        struct seminfo *__buf;

    } sd;

    struct semid_ds sd_buf;

    k = semget(IPC_PRIVATE, 10, IPC_CREAT | 0666 );

    printf("%d\n", k);

    if (k < 0) {

        printf("semget failed: %m\n");

        return 1;

    }

    sd.buf = &sd_buf;

    r = semctl(k, 0, IPC_STAT, sd);

    printf("%d\n", r);

    if (r < 0) {

        printf("semctl IPC_STAT failed: %m\n");

        return 1;

    }

    printf("sem_nsems = %lu\n", sd_buf.sem_nsems);

    if (sd_buf.sem_nsems != 10) {

        printf("failed: incorrect sem_nsems!\n");

        return 1;

    }

    printf("succeeded\n");

    return 0;

}