linux信息缓冲通信实验

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

int main() {
    int pipefd[2];
    pid_t pid;
    char buffer[256];

    if (pipe(pipefd) == -1) {
        perror("pipe");
        exit(EXIT_FAILURE);
    }

    pid = fork();
    if (pid == 0) { // 子进程
        close(pipefd[1]); // 关闭写端
        read(pipefd[0], buffer, sizeof(buffer));
        printf("子进程接收到的消息: %s\n", buffer);
        close(pipefd[0]);
    } else { // 父进程
        close(pipefd[0]); // 关闭读端
        write(pipefd[1], "Hello from parent!", 18);
        close(pipefd[1]);
    }

    return 0;
}

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

struct msg_buffer {
    long msg_type;
    char msg_text[100];
} message;

int main() {
    key_t key;
    int msgid;

    // 生成键值
    key = ftok("progfile", 65);

    // 创建消息队列
    msgid = msgget(key, 0666 | IPC_CREAT);
    message.msg_type = 1;

    printf("写入消息: ");
    fgets(message.msg_text, sizeof(message.msg_text), stdin);

    // 发送消息
    msgsnd(msgid, &message, sizeof(message), 0);

    return 0;
}