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

struct msgbuf {
    long mtype;
    char mtext[100];
};

int main() {
    key_t key;
    int msgid;
    struct msgbuf received;

    // Generate unique key
    key = ftok("progfile", 65);

    // Create message queue and return identifier
    msgid = msgget(key, 0666 | IPC_CREAT);
    if (msgid == -1) {
        perror("msgget");
        exit(EXIT_FAILURE);
    }

    // Receive the message
    if (msgrcv(msgid, &received, sizeof(received.mtext), 1, 0) == -1) {
        perror("msgrcv");
        exit(EXIT_FAILURE);
    }

    printf("Message received: %s\n", received.mtext);

    // Destroy the message queue
    if (msgctl(msgid, IPC_RMID, NULL) == -1) {
        perror("msgctl");
        exit(EXIT_FAILURE);
    }

    return 0;
}