MC Package Name

[Smirjit Singh]

Hi All,

Is it possible to know which user has loged in which package of MC/Service Guard ? Actually we have one cluster. 4 nodes is attached with that cluster. Now generally our user logs in by making telnet . So actually physically they logs in different node. But if I want to execute some command which will act according to package name. Then how I can execute. Becs hostname will return node name.

Is their anyway to know package name where user has logged in ?

[Santosh Nair_1]

Sandip,

One way that occured to me was to use the lsof command on the parent telnetd process, something like of -p $PPID|grep TCP. One of the field in this is the ip/hostname that established the telnet session.

I'm sure there are better ways, but this is what I came up with off the top off my head.

-Santosh

[linuxfan · Accepted solution]

Hi Sandip,

You could do something like this,

Create a file called /etc/checkhost

/Begin/
#!/sbin/sh
trap "" 1 2 3

PATH=/usr/bin:/sbin:/usr/local/bin
UID=$(/usr/bin/id -u)

who -mu | awk '{print $2, $NF}' | while read TTY host
do
MYPID=`ps -ef |egrep " $PPID "|egrep -v "$$|egrep" | awk '{print $2}'`

TO_HOST=`lsof -p $MYPID | egrep ":telnet|:login" |head -1 | awk '{print $9}'|cut -d: -f1`

echo "##################################"
echo "You logged in to host $TO_HOST"
# You can do additional commands here based on the static or relocatable host
echo "########################"
sleep 4
done

/End/


Also modify your /etc/profile to include

/Begin/
if [ -f /etc/checkhost ]
then
. /etc/checkhost
fi
/End/
-HTH
Ramesh

[Santosh Nair_1]

Just thought of another way to get this information...

Get the hostname where the user came from using last -R -1 $LOGNAME. Then use netstat -a |grep
to get the IP address that they telneted to.

---snip---
FRM_HOST=$(last -R -1 snair|awk '{print $3}'|cut -f 1 -d.)
TO_HOST=$(netstat -a|grep $FRM_HOST|awk '{print $4'}|cut -f 1 -d.)

Code can probably be cleaned up a lot, but basically this is how it would work.

-Santosh

[Sanjay_6]

Hi,

If you have logging enabled for telnet in /etc/services , then i think you can find this info from /var/adm/syslog/syslog.log. Just a thought.

Hope this helps.

Thanks