sunbeam:bomr[/usr1/isac/tools] > screen -v
Screen version 3.09.15 (FAU) 13-Mar-03
This is running on Sun Solaris 8
We use screen primarily for it's multiuser capability, which allows us
to share access to perpetual telnet sessions that are opened to a number
of single-purpose black-box devices. There are many people who access
the devices by attaching to perpetual screen sessions, and any existing
sessions may have been started by any of the user group.
I would like to be able to issue commands to these long-running screen
sessions that are running in multi-user mode. The problem is that
apparently only the originator of the intial session, the owner, is able
to access the /tmp/S-xxxxxx directory:
sunbeam:bomr[/usr1/isac/tools] > screen -S userxxx/13471.PLC9 -X 'log on'
Cannot opendir /tmp/screens/S-userxxx: Permission denied
(sorry if the above command line wraps...)
Now, I can attach to the specified multiuser session and interactively
issue the command, no problem.
screen -S userxxx/13471.PLC9 -r
From that I gather that the permission issue is not insurmountable, nor
is there a real security issue being enforced. Have I missed something
that would allow me to issue the commands from a non-owner user account?
I would like to have commands issued from a cron job, to ensure that log
files are rotated and being properly written.
If this capability is currently unsupported, is it something that could
be added without a major effort? I would be willing to attempt to add
the capablility myself, if someone familiar with the code can give some
general direction to get me started. I have spent an hour or so browsing
the sources, and didn't see much that looked like what I thought was the
right places to work on.
Thanks.
--- rod.
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