给我写一个socket c语言应用程序，用于给多个客户端进程发送消息，实现一对多进程间通信，用sendmsg函数和struct sockaddr_un unet结构体实现进程间通信

在C语言中，要创建一个socket应用程序来实现实时一对多进程间的通信，你可以使用sendmsg函数和struct sockaddr_un结构体，这通常在Unix系统上进行网络无名套接字（Unix Domain Sockets）通信。以下是一个简单的示例，展示了如何初始化套接字、监听连接请求，并向所有连接的客户端发送消息：

#include <stdio.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <string.h>
#include <sys/un.h>
#include <sys/sendmsg.h>

#define MAX_CLIENTS 10
#define BUFFER_SIZE 1024

void *server_thread(void *arg) {
    int server_sock = socket(AF_UNIX, SOCK_STREAM, 0);
    struct sockaddr_un addr;
    memset(&addr, 0, sizeof(addr));
    addr.sun_family = AF_UNIX;
    strcpy(addr.sun_path, "/tmp/server_socket");

    if (bind(server_sock, (struct sockaddr *)&addr, sizeof(addr)) == -1) {
        perror("Failed to bind");
        return NULL;
    }

    listen(server_sock, MAX_CLIENTS);

    while (true) {
        struct sockaddr_un client_addr;
        socklen_t client_len = sizeof(client_addr);
        int client_sock = accept(server_sock, (struct sockaddr *)&client_addr, &client_len);

        char message[BUFFER_SIZE] = "Hello from server";
        sendmsg(client_sock, (struct msghdr *) &message, strlen(message), 0, (struct iovec *)NULL, 1, MSG_NOSIGNAL); // Sending the message to each connected client

        close(client_sock);
    }
    return NULL;
}

int main() {
    pthread_t threads[MAX_CLIENTS];
    for (size_t i = 0; i < MAX_CLIENTS; ++i) {
        pthread_create(&threads[i], NULL, server_thread, NULL);
    }

    for (size_t i = 0; i < MAX_CLIENTS; ++i) {
        pthread_join(threads[i], NULL);
    }

    return 0;
}