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<td width="68%" background="DDl_back2.jpg" height="44"><big><big><font face="黑体"><p align="center">               ● UNIX网络编程                       (BM: clown)                </font></big></big></td></tr>
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<tr><td width="100%" colspan="2" height="100" align="center" valign="top"><br><p align="center">[<a href="index.htm">回到开始</a>][<a href="315.htm">上一层</a>][<a href="397.htm">下一篇</a>]
<hr><p align="left"><small>发信人: samsa (沙门~屏绝进取，一意著书), 信区: Hacker <br>

标  题: samsa 的登录机-rwn.c <br>

发信站: BBS 水木清华站 (Mon Jul  5 08:34:53 1999) <br>

  <br>

/* <br>

 * This file is a part of the samsa-logion Password tryer <br>

 * Copyright  (c) 1999 by Samsa Hacking Corp. <br>

 */ <br>

  <br>

#include <stdio.h> <br>

  <br>

int    readn(fd,ptr,nbytes) <br>

register   int  fd; <br>

register  char *ptr; <br>

register   int  nbytes; <br>

{ <br>

 int nleft,nread; <br>

  <br>

 nleft=nbytes; <br>

 while (nleft>0){ <br>

  nread=read(fd,ptr,nleft); <br>

  if (nread<0) return(nread); <br>

  else if (nread==0) break; <br>



  nleft -=nread; <br>

  ptr   +=nread; <br>

 } <br>

 return (nbytes-nleft); <br>

} <br>

  <br>

int writen(fd,ptr,nbytes) <br>

register    int  fd; <br>

register   char *ptr; <br>

register    int  nbytes; <br>

{ <br>

 int nleft,nwritten; <br>

  <br>

 nleft=nbytes; <br>

 while(nleft>0){ <br>

  nwritten=write(fd,ptr,nleft); <br>

  if (nwritten<=0) return(nwritten); <br>

  <br>

  nleft -=nwritten; <br>

  ptr   +=nwritten; <br>

 } <br>

 return (nbytes-nleft); <br>



} <br>

</small><hr>
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