#include <unistd.h>
#include <signal.h>
#include <sys/param.h>
#include <sys/stat.h>
void init_daemon(void)
{
    int pid;
    int i;

    if(pid=fork())
        exit(0);//是父进程，结束父进程
    else if(pid< 0)
        exit(1);//fork失败，退出
   //是第一子进程，后台继续执行
    
    setsid();//第一子进程成为新的会话组长和进程组长
    //并与控制终端分离
    if(pid=fork())
    exit(0);//是第一子进程，结束第一子进程
    else if(pid< 0)
    exit(1);//fork失败，退出
    //是第二子进程，继续
   //第二子进程不再是会话组长
    
    for(i=0;i< NOFILE;++i)//关闭打开的文件描述符
    close(i);
    chdir("/tmp");//改变工作目录到/tmp
    umask(0);//重设文件创建掩模
    return;
}

#include <stdio.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <time.h>
#include <errno.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/wait.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#define IPSTR "1.1.1.1"
#define PORT 80
#define BUFSIZE 1024

void init_daemon(void); //守护进程初始化
int main(int argc, char **argv)
{
    FILE *fp;
    time_t t;
    int sockfd, ret, i, h;
    struct sockaddr_in servaddr;
    /*
      sockaddr_in(在netinet/in.h中定义):
      struct sockaddr_in{
      short sin_family;/*地址族一般来说是 AF_INET
      unsigned short sin_port; /* Port number(必须采用网络数据格式,普通数字可以用htons()转换成网络格式的数字)
      }
    */
    char str1[4096], str2[4096], buf[BUFSIZE], *str;
    socklen_t len;
    fd_set   t_set1;
    struct timeval  tv;
    /*
      struct timeval{
          time_t  tv_sec; //seconds
          suseconds_t tv_usec; // 毫米 microseconds
      }
     */
    init_daemon(); //守护进程初始化
    while(1){
        if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0 ) {
            printf("创建网络连接失败,本线程即将终止---socket error!\n");
            exit(0);
        };
        /*填写sockadd_in结构*/
        bzero(&servaddr, sizeof(servaddr));
        servaddr.sin_family = AF_INET;
        servaddr.sin_port = htons(PORT);
        if (inet_pton(AF_INET, IPSTR, &servaddr.sin_addr) <= 0 ){
            //inet_pton 将点分十进制IPSTR转换成一个16进制地址,转换错误返回0
            /*另一种填写servaddr.sin_addr.addr = inet_addr(IPSTR);*/
            printf("地址错误--inet_pton error!\n");
            exit(0);
        };
        /*尝试连接*/
        if (connect(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr)) < 0){
            printf("连接到服务器失败,connect error!\n");
            exit(0);
        }
        //printf("与远端建立了连接\n");
        //发送数据
        memset(str2, 0, 4096); 
        //memset(void *s, int c, size_t n)将参数s的内存前n个字符串用参数c填入，常用做内存控件初始化
        strcat(str2, "qdxq=kx&qdmode=1&todaysay=love+is+beautiful.so+beautiful&fastreply=1");
        str=(char *)malloc(128);
        len = strlen(str2);
        sprintf(str, "%d", len);
        
        memset(str1, 0, 4096);
        strcat(str1, "POST http://xxx.xxx.com/plugin.php?identifier=dps_sign&module=sign&operation=qiandao&infloat=1&inajax=1 HTTP/1.1\n");
        strcat(str1, "Host: xxx.xxxx.com\n");
        strcat(str1, "Content-Type: application/x-www-form-urlencoded\n");
        strcat(str1, "User-Agent: Mozilla/5.0 (X11; Linux i686) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/30.0.1599.114 Safari/537.36\n");
        strcat(str1, "Cookie:你的cookie\n");
        strcat(str1, "Content-Length: ");
        strcat(str1, str);
        strcat(str1, "\n\n");
        
        strcat(str1, str2);
        strcat(str1, "\r\n\r\n");
        // printf("%s\n",str1);
        
        ret = write(sockfd,str1,strlen(str1));
        /*  write(int fd, const void *buf, size_t count)*/
        if (ret < 0) {
            printf("发送失败！错误代码是%d，错误信息是'%s'\n",errno, strerror(errno));
            exit(0);
        }else{
             //printf("消息发送成功，共发送了%d个字节！\n\n", ret);
        }
        /*接受从server端传来的信息*/
        //FD_ZERO(&t_set1); //清空套接字集合
        //FD_SET(sockfd, &t_set1); //将sockfd加入t_set1集合中
        //对fd_set还有种常见用法FD_CLR(fd,&set)将fd从集合中清楚
        // printf("%d",sizeof(t_set1));exit(0); result:128Byte = 128*8个fd
        //可监控的fd个数取决于sizeof(fd_set)
        /*
          while(1){
              sleep(2);
              tv.tv_sec = 0;
              tv.tv_usec = 0;
              h = 0;
              h = select(sockfd +1, &t_set1, NULL, NULL, &tv);
              //printf("\n%d",h);exit(0); //results:1
          
             //if (h == 0) continue;
             if (h < 0) {
                  close(sockfd);
                  printf("在读取数据报文时SELECT检测到异常，该异常导致线程终止！\n");
                  return -1;
              };
          
              if (h > 0){
              memset(buf, 0, 4096);
              i= read(sockfd, buf, 4095);
              if (i == 0){
                  close(sockfd);
              printf("读取数据报文时发现远端关闭，该线程终止！\n");
              return -1;
           }
          
           printf("%s\n", buf);
         }
        
         }*/
        close(sockfd); 
        // return 0;
        /*写入日志*/
        
        if((fp=fopen("sign.log","a"))>=0){
            t = time(0);
            fprintf(fp, "l137 was here at %s", asctime(localtime(&t)));
            fclose(fp);
        }
        sleep(14400); //每四个小时签到，妈妈再也不担心，今天没签到了
    }
    return 0;
}

CC = gcc
all:myapp

myapp: 
    $(CC) -g init_daemon.c bbs_sign.c -o l137
clean:
    rm -rf  l137