[ILUG] Identifying telnet connections?

[Kevin Dobey]

Re: DUH 
Not really that obvious - I struggled with it for a while !! :) 

Re: More then one telnet connections 
That's what the tail -1 does !
It will only give you the last entry !
Of course you may prefer to use head -1 - that will gove you the first entry

which might be more accurate if you got a unixbox1 unixbox2 scenario that i
mentioned. 

Of course the prefered solution would be to use "who -m" that way you get
'THIS' telnet connection. 

On the other hand - well behaved X clients will set the DISPLAY for you (I
think - i don't think exceed (v5) does this - but I am not sure). 

what I mean is the best solution is the one some one else suggested already 
On linux boxes 
	export MYIP=`who -m | cut -f1 -d!`
on AIX/Solaris boxes 
	export MYIP=`who -m | cut -f2 -d"(" | cut -f1 -d")"`

And then a "export DISPLAY=$MYIP:0.0" after that . 

	- but ain't the awk solution fun !! :) 


-----Original Message-----
From: Paul Jakma [mailto:Paul.Jakma at Digital.com]
Sent: 03 June 1999 11:58
To: 'Tony_Melia at Dell.com'; 'Kevin Dobey'
Cc: 'ilug at linux.ie'
Subject: RE: [ILUG] Identifying telnet connections?




> Relating to your awk problem...
> 
> if you do something like 
> who | awk '/'$USER'/' {print $6} ' 
> the $USER gets expanded into the awk command. 
> 	(you can muck this approach into your requirement) 
> 
of course... doh!

> Even better - 
>  export Myip=`who | awk '/'$USER'/ {print substr(substr
> ($6,2),1,length($6)
> - 2 ) }' | tail -1`
> 
> That will strip out the braces either side of the IP address aswell 
> feel free to add a ":0" string to the end as you like !!
> 
damm forgot about the X display bit... :),

> Of course "who am i" or "who -m" (thanks again ILUG) would be better. 
> But thats academic. 
> 
what happens if you have two telnet connections open? You don't have to
worry about braces with last either.



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