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Issues getting multiuser to work

From: bradley . schrag
Subject: Issues getting multiuser to work
Date: Fri, 5 Jun 2009 14:37:12 -0500

Hi. I'm new to the list. Have been using screen on a limited basis for a few years.

Neither I nor my *nix admin can see why I can't get multiuser to work. Details are below, but in summary, it looks like we have privileges and group membership set up correctly. But I get nothing but "Attach attempt with bad PID (###)!" errors when attempting screen -x.

Does anyone have any ideas on what we're missing? One basic question: is a confirmation given upon successful completion of an addacl command? If so, maybe that's where this is failing since there's no message given.

Any ideas are greatly appreciated.


Screen version: 4.00.02 (FAU) 5-Dec-03
AIX version:

ownerid (owner) session

server /home/ownerid-> which screen

server /opt/TWWfsw/bin-> ls -l screen
lrwxrwxrwx   1 root     system           31 Sep 25 2007  screen -> pt/TWWfsw/

server /opt/TWWfsw/screen40/bin-> ls -l
total 1008
-rwsr-sr-x   1 root     system       514301 Sep 14 2007  screen

server /home/ownerid-> whoami
server /home/ownerid-> screen  

$ screen -ls
There is a screen on:
       823484.pts-3.servername   (Attached)
1 Socket in /tmp/screens/S-ownerid.

C-a:multiuser on
C-a:addacl otherid

$ screen -ls
There is a screen on:
       823484.pts-3.servername   (Multi, attached)
1 Socket in /tmp/screens/S-ownerid.

otherid session

server /home/otherid-> whoami

server /home/otherid-> groups otherid
otherid : info system printq mqm

server /home/otherid-> which screen

server /home/otherid-> screen -x ownerid/823484.pts-3.servername

Then this error is presented on ownerid session:

       Attach attempt with bad PID (###)!

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