Programming

struct mymsg
{
        long mtype ;
        char data[1000] ;
};

int main()
{
        int msqid ;
        int* nod ;
        struct mymsg msg ;
        struct msqid_ds msgds ;
        key_t key ;
        key = ftok("/home/tefino/Documents/APUE_exercise/IPC/ipc",1) ;
        perror(NULL) ;
        msqid = msgget(key,O_RDWR|IPC_CREAT|IPC_EXCL|S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) ;
        perror(NULL) ;
        msgctl(msqid, IPC_STAT, &msgds) ;
        msgds.msg_perm.mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH ;
        msgctl(msqid, IPC_SET, &msgds) ;
        msgrcv(fd,&msg, 1000, 0,  0) ;
        perror(NULL) ;
        printf("%s\n", msg.data) ;
}

struct mymsg
{
        long mtype ;
        char data[1000] ;
};

int main()
{
        int msqid ;
        key_t key ;
        struct mymsg msg ;
        key = ftok("/home/tefino/Documents/APUE_exercise/IPC/ipc",1) ;
        gets(msg.data) ;
        msqid = msgget(key, O_WRONLY) ;
        perror(NULL) ;
        struct msqid_ds mds ;
        msgctl(msqid, IPC_STAT, &mds) ;
        mds.msg_perm.mode = S_IWUSR|S_IRUSR ;
        msgctl(msqid, IPC_SET, &mds) ;


        msgsnd(msqid, &msg, 1000, 0) ;
        perror(NULL) ;
}

// from man page
           struct msgbuf {
               long mtype;       /* message type, must be > 0 */
               char mtext[1];    /* message data */
           };