p12-12.c

SUN Solaris8平台下进程间通信

#include <time.h>
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include "err_exit.h"
#define LISTENQ  5
#define MAXLINE  512
int make_socket(unsigned short int);
int main(int argc, char **argv)
{
    int listenfd,connfd;
    size_t len;
    struct sockaddr_in servaddr,cliaddr;
    char buff[MAXLINE];
    time_t ticks;
    /* 创建并命名套接字，make_socket参见程序12－9 */
    listenfd = make_socket(13);   /* daytime 服务端口 */
    /* 创建侦听队列 */
    listen(listenfd, LISTENQ);
    /* 连接处理 */
    for(; ;){
        len = sizeof(cliaddr);
        /* 接收连接 */
        connfd = accept(listenfd, (struct sockaddr *)&cliaddr, &len);
        /* 打印出连接的客户是谁 */
        printf("connect from %s,port %d\n", 
            inet_ntoa(cliaddr.sin_addr.s_addr),ntohs(cliaddr.sin_port));
        /* 向客户报告时间 */
        ticks = time(NULL);
        sprintf(buff,"%.24s\r\n",ctime(&ticks));
        write(connfd,buff,strlen(buff));
        /* 关闭连接套接字 */
        close(connfd);
    }
}