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<p><FONT class=normalfont><B><font color=blue>finger统计同ip地址的tty终端数</font></B></FONT><BR><FONT class=smallfont color=#ff9900>2004-04-23 15:18 pm</FONT><BR><FONT class=normalfont>作者：作者<br>来自：Linux知识宝库<br>联系方式：无名<br><br>finger fz99<br>
Login name: fz99                    In real life: fz99<br>
Directory: /usr/users/fz99           Shell: /bin/ksh<br>
On since Sep 23 15:44:05                19 minutes Idle Time<br>
  on ttyp1 from 134.236.9.169<br>
On since Sep 23 16:27:26                3 minutes 9 seconds Idle Time<br>
  on ttyp2 from 134.236.118.134<br>
On since Sep 23 16:04:27                7 minutes 39 seconds Idle Time<br>
  on ttyp3 from 134.236.9.169<br>
On since Sep 20 23:51:21                7 minutes 39 seconds Idle Time<br>
  on ttyp4 from 134.236.114.132<br>
On since Sep 23 07:56:33<br>
  on ttyp5 from 134.236.117.131<br>
On since Sep 23 08:05:25                4 minutes 39 seconds Idle Time<br>
  on ttyp7 from 134.236.113.131<br>
On since Sep 23 14:30:17                2 hours 3 minutes Idle Time<br>
  on ttyp9 from 134.236.120.133<br>
# finger -f fz99|awk '{ printf $NF }'<br>
fz99/bin/kshTime134.236.9.169Time134.236.118.134Time134.236.9.169Time134.236.114.132Time134.236.117.131Time134.236.113.131Time134<br>
#<br>
要统计同ip地址的tty终端数，终端数大于3，送消息给大于3的各个终端，如何写？<br>
<br>
<br>
 <br>
程序好像倒不难写，不过还是觉得亲眼看一看，然后打个电话就通知一下就可以了<br>
<br>
100来个终端，电话也不固定。山地獾，简单，就请下笔吧。<br>
<br>
## 当同一地址的终端数小于或等于cnt4ip时,不理会<br>
#cnt4ip=3<br>
cnt4ip=0   #测试时取值<br>
<br>
finger -f     | awk '{printf("%s|/dev/tty%s",substr($0,60,15),substr($0,32,2))<br>
}' | sed 's/^|/127.0.0.1|/g' |sort &gt;fl1<br>
cut -d "|" -f1 fl1 |sort -u &gt; fl2<br>
for ip in `cat fl2`<br>
do<br>
  grep $ip fl1 &gt;fl3<br>
  lines=`wc -l fl3 |awk '{print $1}'`<br>
  if [ $lines -le $cnt4ip ]<br>
  then<br>
     continue<br>
  fi<br>
<br>
  for str in `cat fl3`<br>
  do<br>
     str4ip=`echo $str | awk -F "|" '{print $1}'`<br>
     str4tty=`echo $str | awk -F "|" '{print $2}'`<br>
     echo "快点退出! 不然我扣你的钱!" &gt; $str4tty<br>
  done<br>
done<br>
<br>
&gt; echo "快点退出! 不然我扣你的钱!" &gt; $str4tty<br>
<br>
俺就喜欢这句，建议改为：<br>
<br>
<br>
echo "快点退出! 不然枪毙" &gt; $str4tty<br>
<br>
<br>
这样子倒不如把这一脚本修改一下，放到/etc/profile中去或者在当中调用一下，他们的$HOME/.profile必须读一下/etc/profile，$HOME/.profile性质改为只读。当统计发现已经3个终端了，就不让继续login就好了。扣他们的钱一说，也可以放进login message中去嘛，呵呵。<br>
<br>
怎么修改才能实现红袖添香说的功能呀？<br>
<br>
可以把那段代码写在一个SHELL 里。然后在.profile 文件中调用一下。<br>
<br>
 <br>
<br>
既然又有人up了，就简单再说一下。<br>
<br>
以前在BSD版里也有人问到这样类似的问题，能否限制用户的登录次数。当时我是这么回答的，理论上可以实现，但实际中可能要考虑挺多东西，要根据自己的情况作调整。<br>
<br>
强制用户login前必须执行下面这一段脚本，可以是/etc/profile或另外一个单独脚本或其它形式，在$HOME/.profile中调用它，并且规定只读属性，总之要保证，必须让它被执行过。还要考虑到，如果用户使用其它shell, 或根本就是为了逃避$HOME/.profile的限制而故意chsh后使用其它shell的情况等等。<br>
<br>
<br>
。。。<br>
<br>
LOGINS=`who | grep $USER | wc -l`<br>
<br>
if [ "$LOGINS" -ge 3 ]; then<br>
   echo "$USER: too many login sessions, sorry!"<br>
   exit<br>
fi<br>
<br>
<br>
下面引用由laoxia在 2002/12/20 01:39am 发表的内容：<br>
&gt; echo "快点退出! 不然我扣你的钱!" &gt; $str4tty<br>
俺就喜欢这句，建议改为：<br>
echo "快点退出! 不然枪毙" &gt; $str4tty<br>
<br>
<br>
俺想改为<br>
echo "退出! 然后将罚款交至帐号XXXX" &gt; $str4tty<br>
XXXX是的帐户<br>
 <br>
我在solaris 5.6上测试， 好像要这样写：<br>
finger -f | awk '{printf("%s|/dev/%s",substr($0,60,15),substr($0,32,6))}'<br>
</FONT><br>
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