linux多个进程通信消息队列

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

struct msgbuf {
    long mtype;       /* message type, must be > 0 */
    char mtext[100];    /* message data */
};

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

    key = ftok("/tmp/example", 65);
    msgid = msgget(key, 0666 | IPC_CREAT);

    msg.mtype = 1;
    strcpy(msg.mtext, "Hello, World!");

    msgsnd(msgid, &msg, sizeof(msg.mtext), 0);

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

    return 0;
}

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

struct msgbuf {
    long mtype;       /* message type, must be > 0 */
    char mtext[100];    /* message data */
};

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

    key = ftok("/tmp/example", 65);
    msgid = msgget(key, 0666 | IPC_CREAT);

    msgrcv(msgid, &msg, sizeof(msg.mtext), 1, 0);
    printf("Received message: %s\n", msg.mtext);

    msgctl(msgid, IPC_RMID, NULL);

    return 0;
}