216.htm

unix高级编程原吗

                     "]",              "   ",          /* 文章题目 <br>
*/ <br>
*/ <br>
                     "T",              "\r\n"          /*确定 <br>
*/ <br>
                    }; <br>
/* 下面的字符是文章输入完之后的情况                            */ <br>
/* 左边的一列是需要自己从键盘输入的,右边的一列是server传过来的 */ <br>
char command2[ M ][20]={ <br>
                    "^W",              "]:",        /*文章输完后按Ctrl-W存盘 <br>
*/ <br>
                    "s\r\n",           "[h]",       /*按s转信 <br>
*/ <br>
                    "!\r\n"                         /*旋风离站 <br>
*/ <br>
                 }; <br>
int                     sockfd=-1;                 /*管套描述符            * <br>
/ <br>
void                    waitString(char *string);      /*等待一个特定字符串 <br>
   * <br>
unsigned char  receiveChar(void)       //从socket读取server发来的一个字节 <br>
{ char tmp; <br>
  if(read(sockfd,& tmp,1)<=0 ) { printf("read socket error.\n"); exit(-1);} <br>
  return tmp; <br>
} <br>
} <br>
void sendChar(char ch)           //从socket向server发送一个字节 <br>
{ <br>
  if( write(sockfd,& ch,1)<0 ) { printf("write socket error.\n"); exit(-1); <br>
} <br>
} <br>
void sendString(char p[])       //从socket向server发送一个字符串 <br>
{ <br>
if(write(sockfd,p,strlen(p))<0) { printf("write socket error.\n"); exit(-1); <br>
 }; <br>
} <br>
void killHandle(void)        //信号处理函数 <br>
{ <br>
   close(sockfd); <br>
   exit(0); <br>
} <br>
/*========================================================================== <br>
=*/ <br>
main(int argc,char **argv) <br>
{ <br>
        struct sockaddr_in      host; <br>
        struct hostent          *hp; <br>
        int                     commandCounter; <br>

        int                     status; <br>
        int                     f,k; <br>
        char                    fileBuf[SIZE]; <br>
        if( argc<4) { printf("Usage: %s  fileName  boardName title\n",argv[0 <br>
]); <br>
                       exit(0); <br>
                    } <br>
        f=open(argv[1],O_RDONLY);                       /*打开本地磁盘文件 <br>
 */ <br>
        if( f< 0) { printf("open file error\n"); exit(-1); } <br>
        for(k=0; k< NUM_OF_BOARD; k++) <br>
        { <br>
          if( strcmp(argv[2],boardName[k])==0) <br>
          { sprintf(& (command1[BOARD][0]),"%d\r\n\r\n",k+1); <br>
            break; <br>
          } <br>
        } <br>
        if(k>=NUM_OF_BOARD) { printf("Bad boardName: %s\n",argv[2]); <br>
                              exit(0); <br>
                            } <br>
        strcpy(& (command1[TITLE][0]),argv[3]); <br>
        strcat(& (command1[TITLE][0]),"\r\n"); <br>

        signal(SIGTERM,killHandle);                     /* 设回调函数 <br>
 */ <br>
        signal(SIGINT,killHandle); <br>
        hp = gethostbyname("bbs.gznet.edu.cn");           /* bbs服务器的名字 <br>
 */ <br>
        if(hp==NULL) { printf("Unkonwn host\n"); exit(-1); } <br>
        bzero((char *)& host,sizeof(host)); <br>
        bcopy(hp->h_addr,(char *)& host.sin_addr,hp->h_length); <br>
        host.sin_family=AF_INET; <br>
        host.sin_port=htons(23);                         /*telnet标准端口  * <br>
/ <br>
        if ( (sockfd=socket(AF_INET,SOCK_STREAM,0))<0 )  /* 阻塞式socket */ <br>
        { printf(" Error open socket\n"); <br>
          exit(-1); <br>
        } <br>
        status=connect(sockfd,(struct sockaddr *)& host,sizeof(host));/*连接 <br>
*/ <br>
        if(status<0) { printf("Connect error\n"); exit(-1); } <br>
        for(commandCounter=0; commandCounter< N;  )     /*登录进bbs站  */ <br>
        {  waitString( command1[commandCounter ++] ); <br>
           sendString( command1[commandCounter ++] ); <br>
        } <br>
        } <br>
        while( (status=read(f,fileBuf,SIZE) )>0 )      /*把文件内容发往bbs * <br>
/ <br>
        {  for(k=0; k< status; k++) <br>
           { write(sockfd,&(fileBuf[k]),1); <br>
             if( fileBuf[k]==0x0A ) write(sockfd,"\0x0D",1); <br>
           } <br>
        } <br>
        sleep(1); <br>
        close(f); <br>
        for(commandCounter=0; commandCounter< M -1; ) /* 存盘离站        */ <br>
        {  sendString( command2[ commandCounter ++] ); <br>
           waitString( command2[ commandCounter ++ ]); <br>
        } <br>
        sendString(command2[M-1] ); <br>
        sleep(1); <br>
        close(sockfd); <br>
        printf("\npost ok.\n"); <br>
} <br>
/*========================================================================== <br>
=*/ <br>
void waitString( char *string) /*从server发来的字节流中匹配特定串,找到就返回 <br>
  */ <br>
  */ <br>
{ <br>
    int                     m,n; <br>
    int                     len; <br>
    char                    equal; <br>
    char                    term[]="dumb";     /* 终端类型: 哑终端   */ <br>
    int                     status; <br>
    struct timeval          timeout; <br>
    struct fd_set           mask; <br>
    unsigned char           c,cmd,opt; <br>
    len=strlen(string);                    /* 欲匹配的串的长度       */ <br>
    m=0;                                   /* 串中的当前匹配位置     */ <br>
    equal=FALSE;                           /* 布尔变量               */ <br>
    for(;;) <br>
    {      n=read(sockfd,& c,1);           /* 读取一个字节           */ <br>
           if( n<=0 ) { printf("socket read error.\n"); exit(-1); } <br>
           if (c == 255)                  // IAC字符,后跟telnet命令和协商选项 <br>
  <br>
           { <br>
                cmd = receiveChar();         //读入命令 <br>
                opt = receiveChar();         //读入选项 <br>
                switch(opt) { <br>
                        case 1:          // echo协商选项,本程序未处理 <br>

                        break; <br>
                        case 3:          // supress go-ahead(抑制向前选项) <br>
                        break; <br>
                        case 24:        // terminal type(终端类型选项) <br>
                        if (cmd == 253) { <br>
                                 // IAC WILL terminal-type 将告诉server终端类 <br>
型 <br>
                                sendChar((char)255); <br>
                                sendChar((char)251); <br>
                                sendChar((char)24); <br>
                                 // IAC SB terminal-type IS <term> IAC SE <br>
                                sendChar((char)255); //传送终端类型字符串 <br>
                                sendChar((char)250); <br>
                                sendChar((char)24); <br>
                                sendChar((char)0); <br>
                                sendString(term); <br>
                                sendChar((char)255); <br>
                                sendChar((char)240); <br>
                                } <br>
                        else if (cmd == 250) {          //SB和SE要配对出现 <br>
                                while(receiveChar() != 240) <br>
                                        ; <br>

                                } <br>
                        break; <br>
                        default:        // some other command1 <br>
                        if (cmd == 253) { <br>
                                // IAC DONT whatever <br>
                                sendChar((char)255); //其它的协商选项均不同意 <br>
  <br>
                                sendChar((char)252); <br>
                                sendChar((char)opt); <br>
                                } <br>
                 } <br>
            } <br>
            else                                     //处理字符数据 <br>
            { putchar(c); <br>
              if( *(string+m)==c ) { m++; equal=TRUE; } //相等则匹配下一字符 <br>
  <br>
              else                 { m=0; equal=FALSE; }//不等则从头再来 <br>
              if(equal==TRUE  && m>=len)  return;      //找到期待的字符串就返 <br>
回 <br>
            } <br>
     } <br>
} <br>

-- <br>
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-- <br>
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