Lew Hitchner (hitchner++at++netcom.com)
Tue, 25 Oct 1994 14:41:55 -0700
You might also need to make sure access control is enabled for the
client on the remote host you're running the rsh from (your Indigo2).
By default this is controlled by the /etc/X?.host (or maybe X?.hosts)
files on the server machine (your Onyx) where '?' is the number of the
X display(s) (0, 1, or 2) you're using on the server.
I did exactly what Richard is trying to do when I worked at NASA Ames.
Via rsh from an Indigo client we ran a Performer application on a
SkyWriter server using the second pipeline of the 2 pipe SkyWriter (the
SkyWriter's console and pipe 0 monitor were in one lab across the hall,
and we had the pipe 1 monitor in our lab). We also sometimes ran the
Performer application on the SkyWriter via an rlogin to the server
running in a csh window on the client. In the rlogin case, you need to
make sure your X 'DISPLAY' environment variable is set to the server's
display (your Onyx) not the default DISPLAY, which is that of the
client (your Indigo).
As I recall (it's been a year since I left NASA) we did not need to
have a window manager running on the server in either case (rsh or
rlogin). But, I do remember that when no one was logged in on the
console monitor of the server, sometimes client host access control was
blocked and other times it wasn't. I never discovered the reason for
that. It seemed that different users left X host access control in
different states when they logged off. It also depends on how your
system administrator has set up the default host access control on your
Onyx.
I also remember for certain that if someone was running on the console
of the server and then logged out while my Performer process was
running on pipe 1, my pipe 1 processes were killed (though I can't
remember now if all three APP/CULL/DRAW processes were killed or only
the DRAW). This was all under IRIX 4.0.5, and I don't know if the
behavior is the same under 5.2. According to SGI support, the killing
of processes upon console logout is a "feature" of xdm that wasn't able
to be fixed.
Lew Hitchner
Virtual Reality and Visual Simulation Consultant
Mountain View, CA
Voice: 415-964-9425
FAX: 800-825-7689 (USA)
FAX: 510-472-6951 (international)
email: hitchner++at++netcom.com
URL: ftp://ftp.netcom.com/pub/hitchner/hitchner.html
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