Re: [Fwd: sshd display]

[Roger Wells <ROGER dot K dot WELLS at saic dot com>]

Please forgive my silence and I really do appreciate your attention to my problem.  
I originally posted my question on the cygwin-apps list and at Corinna's suggestion I 
posted it on this list without realizing that I was not subscribed.  I only now have
seen your responses as I searched the archives.  I can now provide a specific example 
of what I am doing.

On one cygwin installation:
uname -a => CYGWIN_NT-5.1 dac1 1.5.21(0.156/4/2) 2006-07-30 14:21 i686 Cygwin

the following command on the linux client:
ssh wellsr start foo.exe
results in a windows console popping up with the application (foo) running in it.  
control immediately returns to the linux console.

The key to this working is the following script ("start")
that runs on the cygwin machine:

#!/usr/bin/bash
#
# There must be no spaces in the title field of the start command
# Otherwise, this seems to work, but I don't know how!
#
#
export XAPPLRESDIR="C:\iss60\app-def"
cmd /c start /I \ $1\  $2 $3 $4 $5 $6

(obviously the last line is the operative one)

on another cygwin installation:
uname => CYGWIN_NT-5.1 wellsr 1.5.24(0.156/4/2) 2007-01-31 10:57 i686 Cygwin

the same sequence launches the application and returns control to the linux
console but in this case there is no console window on the cygwin side.  The 
application appears on the task list but no window exists.


[ Charset ISO-8859-1 unsupported, converting... ]
> On Nov 21, 2007 3:58 PM, Robert Kiesling <kiesling@earthlink.net> wrote:
> > [ Charset UTF-8 unsupported, converting... ]
> > > On 11/21/2007, Uber Zooka wrote:
> > > > Because he's trying to go from a linux machine to a machine running
> > > > Cygwin....
> > >
> > > I think you're missing my point.  If there's an answer to this question
> > > in the Linux->Linux case (or on any other UNIXy platforms that don't include
> > > Cygwin) then that same approach should work on Cygwin.  If it doesn't, then
> > > that's a Cygwin issue and on-topic.  If it does work, then that's the answer
> > > to the question and Cygwin has no bearing, thus the original inquiry is
> > > off-topic.
> > >
> > > > He's trying to run an app on a windows machine and wants to know
> > > > how to make the console on the windows machine stay there.
> > >
> > > Since 'ssh' is a client program on the client machine that's logging in
> > > remotely to the server machine, there's nothing visible on the server.
> > > Output goes to the client terminal.  There's no visible mechanism on the
> > > server for this output to "stay" on.  There may be other ways to achieve
> > > something that would be a reasonable alternative in this case but that
> > > would presuppose that we understand what actual problem the OP was trying
> > > to solve.  That's why I suggested he provide more info if he has a Cygwin-
> > > specific issue.
> >
> > An off-topic answer would be xon(1).
>
>
> You're both missing the point.  Throwing in your two cents without
> providing any help is just as bad, if not worse, than someone who's
> asking a *possibly* off-topic question, which, since this involves
> cygwin, is not likely.  If such a marginally off-topic message on this
> incredibly high volume mailing list bothers you, there's a "delete"
> button in your email client.
>
>
> To help the OP:
> An ssh connection typically does not create any sort of console window
> on the system that is being connected to (this is the same on Linux or
> Windows/Cygwin).  Depending on your needs, you may be able to emulate
> something like this using 'screen'.
>
> You can open screen in the local terminal (rxvt is recommended), and
> start a screen session inside of it.  Then when you ssh in, you can
> attach to that screen session using "screen -x" and both parties will
> be able to see what's going on.  There's a little more to it than
> that, and will probably need some experimentation, but that's
> something that can get you started.

I consider myself scolded.  I probably shouldn't try to go any further
without actually trying to do accomplish it.  But here goes.... The
OP could simply replace the remote shell with the app that is to do
the display (which in the case you suggested would be something like
"bash -c screen...."), and let screen virtualize the connection.
Warning - technically OT again, I know, like all Cygwin/X topics here:
Also connecting Unix-Unix or Unix-Cygwin with SSL requires accepting
connections via the X server, which in the case of Cygwin can be coaxed 
into accepting connections via SSL, and then the app would have some degree 
of compatibility cross-platform.  Then the remote command might be something
like "xterm -e screen...."  I don't see much point in arguing about etiquette 
(Where is the cygwin-etiquette list, anyway?), but the vagueness of the original
posting causes me to suggest that there is no, "one way," to go about 
accomplishing this task.  (You didn't get the Window client-server thing backward, 
did you?).  Anyway, this remote display implementating would require a lot of 
RTFM'ing.

HTH

--
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--
Roger Wells, P.E.
SAIC
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Newport, RI 02840
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401-849-1585 (fax)
roger.k.wells@saic.com


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