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[screen-devel] [bug #40421] "Attach attempt with bad pid" multi-user scr

From: anonymous
Subject: [screen-devel] [bug #40421] "Attach attempt with bad pid" multi-user screen on AIX 6.1
Date: Tue, 29 Oct 2013 18:42:03 +0000
User-agent: Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/30.0.1599.101 Safari/537.36


                 Summary: "Attach attempt with bad pid" multi-user screen on
AIX 6.1
                 Project: GNU Screen
            Submitted by: None
            Submitted on: Tue 29 Oct 2013 06:42:02 PM UTC
                Category: Crash/Freeze/Infloop
                Severity: 3 - Normal
                Priority: 5 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.0.3
           Fixed Release: None
         Planned Release: None
           Work Required: None



When using screen so more than one user can interact on the same shell, the
second user cannot connect to the screen session of the first user. 
"multi-user" and "addacl" commands have been executed.  screen program is
setuid to root to allow access.

The first user (who is trying to share their screen) sees the following
message briefly:

"Attach attempt with bad pid(28573732)!"

Of course, the pid number changes.  The second user's session just hangs. 
Nothing is shown.

This is screen version 4.00.03.  This error occurs with AIX 6.1.  The same
version works in AIX 5.3.


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