程序
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <signal.h>
#include <arpa/inet.h>
#include <string.h>
#define PORT 6000
#define SIZE 256
static void handler()//回收子进程函数
{
wait(NULL);
}
int main(int argc, char **argv)
{
int server_socketfd;
int client_socketfd;
int ret;
pid_t pid;
size_t address_len;
struct sockaddr_in server_address;
struct sockaddr_in client_address;
server_socketfd = socket(AF_INET, SOCK_STREAM,0);//创建一个套接字
memset(&server_address,0,sizeof(struct sockaddr_in));
server_address.sin_family = AF_INET;//协议族设置为ARPA因特网协议
server_address.sin_port = htons(PORT);//端口号设为PORT（6000）
server_address.sin_addr.s_addr = htonl(INADDR_ANY);//允许任何客户端可以连接
address_len = sizeof(struct sockaddr_in);
ret = bind(server_socketfd, (struct sockaddr*)&server_address, address_len);//将创建的套接字和address中的地址绑定在一起
if( ret == -1 )
{
printf("bind failed!\n");
exit(0);
}
ret = listen(server_socketfd, 5);//创建一个监听5个请求的队列，也就是说这个服务器允许5个人同时登入
if ( ret == -1 )
{
printf("listen failed!\n");
exit(0);
}
while (1)
{
client_socketfd = accept(server_socketfd, (struct sockaddr*)&client_address, &address_len);//客户连接服务器时建立客户套接字
signal(SIGCHLD,handler);//为了避免子进程结束时造成僵尸进程，需要对结束子进程作处理，handler函数负责回收子进程
pid = fork();
if (pid == 0)//为客户分配的子进程
{
char buffer[256];
int nread;
nread = read(client_socketfd,buffer,sizeof(buffer));
printf("%s",buffer);
}
else if (pid > 0)//父进程把分配的客户套接字关闭，用来供给下个客户
{
close(client_socketfd);//关闭客户套接字
}
else
{
printf("fork faild!\n");
exit(0);
}
}
return 0;
}
然后报错了
/home/zdx/try/c/socket/socket.c: In function ‘main’:
/home/zdx/try/c/socket/socket.c:52:59: warning: passing argument 3 of ‘accept’ from incompatible pointer type [enabled by default]
client_socketfd = accept(server_socketfd, (struct s(^在这)ockaddr*)&client_address, &address_len);//客户连接服务器时建立客户套接字
In file included from /home/zdx/try/c/socket/socket.c:5:0:
/usr/include/x86_64-linux-gnu/sys/socket.h:243:12: note: expected ‘socklen_t * __restrict__’ but argument is of type ‘size_t *’
extern int a(^在这)ccept (int __fd, __SOCKADDR_ARG __addr,