Linux如何使用Unix域套接字通信_Linux本地进程通信教程

#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>

int main() {
    int server_fd, client_fd;
    struct sockaddr_un addr;
    char buffer[1024];

    // 创建Unix域套接字
    server_fd = socket(AF_UNIX, SOCK_STREAM, 0);
    if (server_fd == -1) {
        perror("socket");
        exit(1);
    }

    // 设置地址结构
    addr.sun_family = AF_UNIX;
    snprintf(addr.sun_path, sizeof(addr.sun_path), "/tmp/my_socket");

    // 如果套接字文件已存在，先删除
    unlink(addr.sun_path);

    // 绑定
    if (bind(server_fd, (struct sockaddr*)&addr, sizeof(addr)) == -1) {
        perror("bind");
        close(server_fd);
        exit(1);
    }

    // 监听
    if (listen(server_fd, 5) == -1) {
        perror("listen");
        close(server_fd);
        exit(1);
    }

    printf("等待客户端连接...\n");
    client_fd = accept(server_fd, NULL, NULL);
    if (client_fd == -1) {
        perror("accept");
        close(server_fd);
        exit(1);
    }

    // 读取客户端消息
    int len = read(client_fd, buffer, sizeof(buffer)-1);
    if (len > 0) {
        buffer[len] = '\0';
        printf("收到消息: %s\n", buffer);
    }

    // 清理
    close(client_fd);
    close(server_fd);
    unlink(addr.sun_path); // 删除套接字文件
    return 0;
}

#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>

int main() {
    int sock;
    struct sockaddr_un addr;
    const char *msg = "Hello from client";

    // 创建套接字
    sock = socket(AF_UNIX, SOCK_STREAM, 0);
    if (sock == -1) {
        perror("socket");
        exit(1);
    }

    addr.sun_family = AF_UNIX;
    snprintf(addr.sun_path, sizeof(addr.sun_path), "/tmp/my_socket");

    // 连接到服务端
    if (connect(sock, (struct sockaddr*)&addr, sizeof(addr)) == -1) {
        perror("connect");
        close(sock);
        exit(1);
    }

    // 发送消息
    write(sock, msg, strlen(msg));

    close(sock);
    return 0;
}

gcc server.c -o server
gcc client.c -o client

./server

./client