chap 1:time server

client:

#include <stdio.h>

#include "unp.h"

int main(int argc,char** argv)

{

       int sockfd,n;

       char recvline[MAXLINE+1];

       struct sockaddr_in servaddr;

       if(argc !=2)

       { 

              printf("usage: a.out <IP address>\n");

              exit(0);

      }

     if((sockfd=socket(AF_INET,SOCK_STREAM,0))<0)

      {

           printf("socket erro\n"); 

           exit(0);

       } 

       bzero(&servaddr,sizeof(servaddr)); 

       servaddr.sin_family = AF_INET; 

       servaddr.sin_port =htons(3000);

       if(inet_pton(AF_INET, argv[1],&servaddr.sin_addr)<=0)

       { 

          printf("inet_pton error for %s\n", argv[1]);

          exit(0);

        }

      if(connect(sockfd,(SA *)&servaddr,sizeof(servaddr))<0)

      { 

          printf("sockfd = %d\n", sockfd); 

          printf("addr = %s\n", argv[1]); 

          printf("connect erro\n");

          exit(0);

      }

    while((n = read(sockfd, recvline, MAXLINE))>0)

    {

          recvline[n]=0; 

          printf("read length = %d\n", n);

          if(fputs(recvline,stdout)==EOF) 

               printf("fputs error");

     }

     if(n <0) 

   printf("read error\n"); 

    exit(0);

}

server:

#include "unp.h"

#include <time.h>

int   main(int argc,char** argv)

{

     int listenfd, connfd;

     struct sockaddr_in servaddr;

     char buffer[MAXLINE]; 

     time_t ticks; 

     listenfd = Socket(AF_INET, SOCK_STREAM,0); 

     bzero(&servaddr,sizeof(servaddr)); 

     servaddr.sin_family = AF_INET; 

     servaddr.sin_addr.s_addr =htonl(INADDR_ANY); 

     servaddr.sin_port =htons(3000); 

     printf("linstenfd = %d\n", listenfd); 

     Bind(listenfd,(SA *)&servaddr,sizeof(servaddr)); 

     Listen(listenfd, LISTENQ); 

     printf("listening...\n");

     for(;;)

     { 

           connfd = Accept(listenfd,(SA *)NULL,NULL); 

           printf("accept...\n"); ticks=time(NULL); 

           snprintf(buffer,sizeof(buffer),"%.24s\r\n", ctime(&ticks)); 

           printf("time = %s", buffer); 

           Write(connfd, buffer, strlen(buffer)); 

            Close(connfd);

       }

}

compile on ubuntu 10.10

use some lib file from the resources dowload from the author's website, need change something....