Very Computer

If the computer I am working at and the computer that I want to remotely
logon both run a Unix operating system and xwindows, I have to set DISPLAY
on the remote machine in order to open a window on my local computer. I am
interested in that how to get my local computer name and set DISPLAY
automatically when I logon the remote machine. For security reasons, I could
not use "x" command. I couldn't use "xrsh" because the remote
machine doesn't have "xauth". Does anybody know how I can get the local
computer name and operating system (AIX or SunOS) automatically when I logon
a remote machine?

Thanks in advance

-Bin

|> If the computer I am working at and the computer that I want to remotely
|> logon both run a Unix operating system and xwindows, I have to set DISPLAY
|> on the remote machine in order to open a window on my local computer. I am
|> interested in that how to get my local computer name and set DISPLAY
|> automatically when I logon the remote machine. For security reasons, I could
|> not use "x" command. I couldn't use "xrsh" because the remote
|> machine doesn't have "xauth". Does anybody know how I can get the local
|> computer name and operating system (AIX or SunOS) automatically when I logon
|> a remote machine?

The easiest way is to use whoami or equivalent to determine the remote
machine and then set DISPLAY, this has problems if you don't use
display 0 or the remote machine's name is longer than 16 characters.

# set display if possible
if ($term =~ x*) then
    set displayhost=`who am i | sed -e 's/.*(//' -e 's/).*$//'`
    if ("$#displayhost" == "1") then
        setenv DISPLAY $displayhost\:0
    endif
    unset displayhost
endif

--

Michael Salmon

#include        <standard.disclaimer>
#include        <witty.saying>
#include        <fancy.pseudo.graphics>

Ericsson Telecom AB
Stockholm

Try uname -a (or man uname); this is valid for SunOS and IRIX.

Quote:

> Thanks in advance

> -Bin

Greetings Takis

-----------------------------------------------------------
"And God shall wipe away all tears from their eyes and    |
 there shall be no more Death. Neither sorrow, nor crying.|
 Neither  shall there be any more Brain; for the former   |
 things are passed away."                                 |
                          Revelations, XXI                |
-----------------------------------------------------------



SWITZERLAND        |                                      |
+41 1 920 36 89    |                                      |
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I have found a solution to this problem that works wonderfully.
The solution is in 3 parts.
Part 1, I have the following file in my bin dir called rl:
------
#!/bin/sh
if [ -n "$DISPLAY" ]; then
        case "$DISPLAY" in
        :*)
                DISPLAY=`hostname`$DISPLAY
                ;;
        esac
        TERM="$TERM&$DISPLAY"
        export TERM
fi
xhost +$1 1> /dev/null 2>&1
rlogin $*
cd .
-------------
Part 2, I have the following lines in my .cshrc on ALL that machines I might
log on to.  (Even if I don't do it in a window.)
-------------
if ( $?TERM ) then
        if ( `echo $TERM | tr -cd '&'` != '' ) then
         setenv DISPLAY `echo $TERM | awk "-F&" '{print $2;}' `
         setenv TERM `echo $TERM | awk "-F&" '{print $1;}' `
        endif
endif
---------------
Part 3, I start up a remote window for whatever machine like this:
---------------
xterm -sl 150 -sb -T Phoenix -e /home/pec2/bin/rl phoenix
--------------
Where Phoenix is the name of the remote machine and pec2 is my uid.

This works GREAT!  I can have aliases to pop up remote windows and I have
entries in my menu files so I can use the mouse to pull up a remote window.

Hope this helps.

--
-Paul Carroll

-NSF Engineering Research Center for Computational Field Simulation