TCP/IP网络编程 I/O流分离的半关闭问题(1)(2)

//
// main.cpp
// hello_client
//
// Created by app05 on 15-10-13.
// Copyright (c) 2015年 app05. All rights reserved.
//
//
#include
#include
#include
#include
#include
#include
#define BUF_SIZE 1024
void error_handling(char *message);
int main(int argc, const char * argv[]) {
int sock;
char buf[BUF_SIZE];
struct sockaddr_in serv_adr;
FILE *readfp;
FILE *writefp;
if(argc != 3)
{
printf("Usage: %s \n", argv[0]);
exit(1);
}
sock = socket(PF_INET, SOCK_STREAM, 0);
if(sock == -1)
error_handling("socket() error");
memset(&serv_adr, 0, sizeof(serv_adr));
serv_adr.sin_family = AF_INET;
serv_adr.sin_addr.s_addr = inet_addr(argv[1]);
serv_adr.sin_port = htons(atoi(argv[2]));
if (connect(sock, (struct sockaddr *) &serv_adr, sizeof(serv_adr)) == -1)
error_handling("connect() error");
readfp = fdopen(sock, "r");
writefp = fdopen(sock, "w");
while (1)
{
if (fgets(buf, sizeof(buf), readfp) == NULL) //收到EOF，返回NULL
break;
fputs(buf, stdout);
fflush(stdout);
}
//向服务端发送最后的字符串
fputs("FROM CLIENT: Thank you! \n", writefp);
fflush(writefp);
//半关闭shutdown主要用于服务端，客服端直接关闭一般不会有什么影响( 学习笔记_10)
fclose(writefp);
fclose(readfp);
return 0;
}
void error_handling(char *message)
{
fputs(message, stderr);
fputc('\n', stderr);
exit(1);
}