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Subj:	Re: creating terminal windows from a decstation to a vaxstation

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Date: 20 Jun 91 08:44:19 GMT
From: agate!spool.mu.edu!sdd.hp.com!uakari.primate.wisc.edu!samsung!nstar!inland!allebrandi@ucbvax.Berkeley.EDU  (Tom Allebrandi)
Organization: Inland Steel Research Labs; East Chicago, IN
Subject: Re: creating terminal windows from a decstation to a vaxstation
Message-Id: <976.28606ae3@inland.com>
References: <9106191520.AA16992@eunice.ssc.wisc.edu>
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In article <9106191520.AA16992@eunice.ssc.wisc.edu>, wiebusch@SSC.WISC.EDU (Beth Wiebusch) writes:
> I can create a xterm or dxterm window on my vaxstation from a remote unix
> (ultrix) station.  What I would like to know is:  Has anyone been able
> to use decnet or tcpip to create this type of terminal without having to
> log into the unix station first?  I can do this on the VMS side by doing
> a "type nodename::task" where task is a command procedure which starts up
> a decterm window.  I would like to do this from the unix side.  I have tryed
> about the same thing "type nodename"username password"::task" but this doesn't
> work.  Is there any manuals that I could reference that deal with this?  The
> task on the unix side has the following lines in it:
> 		setenv DISPLAY nodename::0.0
> 		dxterm -ls &
> 
> Has this been done?  Can it be done between two different operating systems?

Yes it can be done. Getting the DECnet task right on the Unix side can
be a little tricky. My experience with doing this is with Ultrix/RISC.

The first thing to note right out of the box is that the task name is
presented in uppercase. This means that the shell script that
represents the task must have an all uppercase name.

The second thing is to remember to set the execute permission on Ultrix
side script.

The easiest thing to do is to make the task object known via ncp on the
Ultrix side. That way you can name the script anything you want. Here is
what our object looks like:

# ncp
ncp>show object DW_LAUNCH char

Object Volatile Characteristics as of Thu Jun 20 08:23:53 CDT 1991

Object = DW_LAUNCH

Number                             = 0
File                               = /usr/local/dw_launch
Type                               = Sequenced Packet
Accept                             = Immediate
ncp>


Here is what the object script (/usr/local/dw_launch) looks like:

#!/bin/sh
# dw_launch
#
# Launch a DEC/Xwindows client application on behalf of another node.
# This is to be invoked as a DECnet object. There will be a one line
# message on stdin in the form "application|server".
#
# "application" is the name of the application to launch.
#
# "server" is the DEC/Xwindows server node where the output display
# is to occur.
#

input=`cat`
application=`echo $input | sed -e "s/\(.*\)\|\(.*\)/\1/"`
server=`echo $input | sed -e "s/\(.*\)\|\(.*\)/\2/"`

case $application in
 DECTERM)	dxterm -display ${server}::0 -ls &;;
 FILEVIEW)	dxue   -display ${server}::0 &;;
 esac


From the VMS side, we do:

$ open/write fyle unix::"0=DW_LAUNCH"
$ write fyle "DECTERM|VMSNOD"
$ close fyle

("unix" is the node name for the unix node, "VMSNOD" is the node name
for the VMS node where the display window is to be created.)

--- Tom
Tom Allebrandi             | Mail guru   - DECUS UUCP Development Team
Inland Steel Research Labs | Chairperson - VMSnet Working Group, DECUS VAX SIG
East Chicago, IN           | Internet:  allebrandi@inland.com
219 399 6306               | UUCP:      ...!uunet!inland!allebrandi
                           | DECUServe: allebrandi