What I'm trying to do is spawn a detached screen session, but as part of the command line that creates it - also modify the ACL list.
So right now I have
screen -dmS MySession "SomeProgram" "SomeArguments"
If I want to modify the ACL of MySession to give another user access to it, I'd have to run a second screen command to run a 'screen' command on that session.
What I need to do is modify the ACL as part of the initial command line used to spawn the session. Is there a way to do this?