topic Re: Automatically set DISPLAY Variable ? in Operating System - HP-UX

Automatically set DISPLAY Variable ?

Rene_17 — Wed, 01 Sep 2004 09:51:41 GMT

I used rlogin for remote login. Each time i could type in the display variable value.

With ssh i know how it works:

ssh -X user@host

Do anyone know how it works with rlogin ?

Rene

Re: Automatically set DISPLAY Variable ?

Simon Hargrave — Wed, 01 Sep 2004 09:55:48 GMT

Hi

You can add this to your .profile: -

export DISPLAY=`who -ma | awk '{print $8}'`:0

Re: Automatically set DISPLAY Variable ?

Pete Randall — Wed, 01 Sep 2004 09:55:49 GMT

Rene,

We avoid the problem entirely by using remsh:

remsh -n /usr/bin/X11/hpterm -display $DISPLAY -ls -title $1 -n $1 -s
b -sl 500 &

Pete

Re: Automatically set DISPLAY Variable ?

Rick Garland — Wed, 01 Sep 2004 10:01:26 GMT

I am using the who -um in .profile for the user.

export DISPLAY=`who -um | awk '{print $NF}'`:0
echo "DISPLAY is set for $DISPLAY"

Re: Automatically set DISPLAY Variable ?

Rene_17 — Thu, 02 Sep 2004 03:15:39 GMT

I login with Exceed from a windows machine !
hostname: pc14-c803

When i log on an other server machine via the unix server the host name of the server is set to the display variable an not the variable from the windows machine !

How can i set a display variable on a remote machine like the display variable on the local machine ?

Regards,
Rene

Re: Automatically set DISPLAY Variable ?

Marcel Boogert_1 — Thu, 02 Sep 2004 03:34:05 GMT

Hi there,

Edit your .profile and add the following line:

export DISPLAY=$(/etc/ping $(who -muR | awk '{print $NF}') -n 1 | grep icmp | aw
k '{print $4}')0.0

MB.

Re: Automatically set DISPLAY Variable ?

Muthukumar_5 — Thu, 02 Sep 2004 03:50:11 GMT

There is a problem when using who command with -R

-R is used to print hostname

When ever your IP-Address get's resolved then only hostname will be in the who -am output

Example:

-- /etc/hosts --
ip-address test.test.com test

---------------

If you login as ,

telent test
login/passwd

check the who -am output now,

it will be as test.test.com not with ip-address.

Display value will get problem when using xterm there.

So try to change as,

IP=$(getip `who -am | awk '{ print $8 }'`)
DISPLAY=$(echo $IP:0)
export $DISPLAY

on .profile file.

Regards
Muthu

Re: Automatically set DISPLAY Variable ?

Marcel Boogert_1 — Thu, 02 Sep 2004 04:12:10 GMT

Muthu,

Thats's why the ping command is involved.

MB.

Re: Automatically set DISPLAY Variable ?

Rene_17 — Thu, 02 Sep 2004 04:26:48 GMT

Setting the display variable works, but the X11Forwarding doesnÂ´t work !

When you lo in you were asked typing in Display Variable ! What system script is that ?

Regards,
re

Re: Automatically set DISPLAY Variable ?

Muthukumar_5 — Thu, 02 Sep 2004 04:50:57 GMT

We have to set DISPLAY variable so that we can start the display on remote machine's shell.

The discussion between me / marcel are based who command. We are getting IP-Address over from there. when ever it's IP-Address resolved then only hostname will come.

Problem is, if we set DISPLAY with hostname then x-windows won't run. It will make problem. So that we can use getip or ping to get ip-address

Remote shell testing.

machine1 --> machine2

I hope r* command setting for rhosts file are made.

check as,

machine 1# remsh machine2 hostname
machine2

So r* is working fine.

Test:

#!/usr/bin/ksh
# remote.ksh
# $1 - hostname
# $2 - user
if [[ $# -ne 2 ]]
then
echo "Usage: remote.ksh "
exit 1
fi

# Display variable
IP=$(getip `who -am | awk '{ print $8 }'`)
DISPLAY=$(echo $IP:0)
export $DISPLAY

# Remote x11 testing
remsh $1 -l $2 -n "/usr/dt/bin/hpterm -display $DISPLAY"

-------------------------

It will start xwindows now.

You can start it parrelel as
remsh $1 -l $2 -n "/usr/dt/bin/hpterm -display $DISPLAY" &
remsh $1 -l $2 -n "/usr/dt/bin/hpterm -display $DISPLAY" &

Regards
Muthu

Re: Automatically set DISPLAY Variable ?

Rick Garland — Thu, 02 Sep 2004 09:57:12 GMT

You don't need to set the DISPLAY on the remote machine that you are connecting to. You want the DISPLAY to come back to you, to be on the local machine you are working on, not the remote server.

On the remote server that you connect to you want to make sure you have done `xhost +` and the response from the remote server would be
"access control disabled, clients can connect from any host"

This function works from Exceed or any other X emulation application. The access control must be disabled to have X11 traffic forwarded