CGI程序访问共享内存错误

    shmid = shmget(key,size,IPC_CREAT|0604);    //Get shared memory segment 

    if(shmid == -1)
    { 
        perror("shm_create::Getting shared memory ------------------------------------- [FAILED]\n" );
        exit(EXIT_FAILURE);
    }

    shmid = shmget(key,size,IPC_CREAT|IPC_EXCL|0777);
    if(shmid == -1)
    {
        shmid = shmget(key,size,IPC_CREAT|0777);
        if(shmid == -1)
        {
            perror("shm_create::Getting shared memory ------------------------------------- [FAILED]\n" );
            exit(EXIT_FAILURE);
        }
    }