#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>

#define LAST_MESSAGE 255

int main(void)
{

    int msqid;
    char pathname[]="09-1a.c";
    key_t  key;
    int i,len;

    struct mymsgbuf
    {
       long mtype;
       char mtext[81];
    } mybuf;



    /* Create or attach message queue  */

    key = ftok(pathname, 0);

    if ((msqid = msgget(key, 0666 | IPC_CREAT)) < 0){
       printf("Can\'t get msqid\n");
       exit(-1);
    }


    /* Send information */

    for (i = 1; i <= 5; i++){

       mybuf.mtype = 1;
       strcpy(mybuf.mtext, "This is text message");
       len = strlen(mybuf.mtext)+1;

       if (msgsnd(msqid, (struct msgbuf *) &mybuf, len, 0) < 0){
         printf("Can\'t send message to queue\n");
         msgctl(msqid, IPC_RMID, (struct msqid_ds *) NULL);
         exit(-1);
       }
    }

    /* Send the last message */

    mybuf.mtype = LAST_MESSAGE;
    len         = 0;

    if (msgsnd(msqid, (struct msgbuf *) &mybuf, len, 0) < 0){
       printf("Can\'t send message to queue\n");
       msgctl(msqid, IPC_RMID, (struct msqid_ds *) NULL);
       exit(-1);
    }

    return 0;
}