linux 多进程服务器实现代码
时间: 2024-05-10 17:14:03 浏览: 6
以下是一个简单的 Linux 多进程服务器的实现代码,仅供参考:
```c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/wait.h>
#define PORT 8080
#define BACKLOG 5
void handle_connection(int client_fd) {
char buffer[1024] = {0};
int valread = read(client_fd, buffer, 1024);
printf("Received message: %s\n", buffer);
char *response = "Hello from server!";
send(client_fd, response, strlen(response), 0);
close(client_fd);
}
int main(int argc, char const *argv[]) {
int server_fd;
struct sockaddr_in address;
int addrlen = sizeof(address);
pid_t pid;
if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == 0) {
perror("socket failed");
exit(EXIT_FAILURE);
}
int opt = 1;
if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR | SO_REUSEPORT, &opt, sizeof(opt))) {
perror("setsockopt");
exit(EXIT_FAILURE);
}
address.sin_family = AF_INET;
address.sin_addr.s_addr = INADDR_ANY;
address.sin_port = htons(PORT);
if (bind(server_fd, (struct sockaddr *)&address, sizeof(address)) < 0) {
perror("bind failed");
exit(EXIT_FAILURE);
}
if (listen(server_fd, BACKLOG) < 0) {
perror("listen");
exit(EXIT_FAILURE);
}
printf("Server listening on port %d...\n", PORT);
while (1) {
int client_fd = accept(server_fd, (struct sockaddr *)&address, (socklen_t *)&addrlen);
if (client_fd < 0) {
perror("accept");
exit(EXIT_FAILURE);
}
pid = fork();
if (pid == 0) {
// Child process
close(server_fd);
handle_connection(client_fd);
exit(EXIT_SUCCESS);
} else if (pid < 0) {
perror("fork");
exit(EXIT_FAILURE);
} else {
// Parent process
close(client_fd);
wait(NULL); // Wait for child process to exit
}
}
return 0;
}
```
这个服务器程序使用了 `fork()` 函数创建子进程来处理客户端连接,父进程则一直等待新的连接。每当有一个新客户端连接时,父进程就会创建一个子进程来处理这个连接,然后再回到等待状态。子进程负责和客户端通信,处理完后就会退出。注意,这个程序还没有实现并发处理多个客户端连接,需要根据具体情况进行修改。