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   <title>Freesoft Linux FAQ -- 在编程中如何获得telnet上来的用户的ip</title>
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标　题: Re: 在编程中如何获得telnet上来的用户的ip
<br>发信站: BBS 水木清华站 (Thu Nov 26 13:28:26 1998) WWW-POST
<p>【 在 scaner (好好) 的大作中提到: 】
<br>:&nbsp; 读/var/run/utmp
<br>:&nbsp; usr/include/utmp.h中有相应的函数
<br>:&nbsp; man utmp也有不少信息.
<br>:&nbsp; 还可以去看看who/last的源程序.
<br>:&nbsp; 大虾能否先给我说一下救救急，然后我在慢慢去read there references.
<p>linux中,我用的是下面一段程序.
<br>struct utmp *
<br>gettheutmp()
<br>{
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; struct utmp *data,I;
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; char *tp ;
<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; tp = ttyname(0) ;
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if(!tp)
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; return NULL ;
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; tp = strchr(tp,'/') + 1 ;
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; tp = strchr(tp,'/') + 1;
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; strncpy(I.ut_line,tp,UT_LINESIZE);
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; I.ut_line[UT_LINESIZE-1]=0;
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; setutent();
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; data = getutline(&amp;I);
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; endutent();
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; return data;
<br>}
<br>&nbsp;返回的是一个utmp数据,成员ut_host就是IP地址吧.
<br>&nbsp;
<br>&nbsp;
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