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Re: Cannot re-attach to screen session after screen-4.3.1-r1 to screen-4

From: Michael Parson
Subject: Re: Cannot re-attach to screen session after screen-4.3.1-r1 to screen-4.4.0 upgrade
Date: Tue, 11 Apr 2017 17:22:54 -0500
User-agent: Roundcube Webmail/1.2.3

On 2017-04-11 09:16, Martin MOKREJŠ wrote:
Hi Amadeusz,

Amadeusz Sławiński wrote:
On Tue, 11 Apr 2017 13:44:32 +0200
Martin MOKREJŠ <address@hidden> wrote:

does anyone have a clue why I cannot re-attached to my existing screen sessions after upgrade?
I use "screeen -R $ID". What should I check?


yes there is incompatibility between those versions, from release message (

"Do note that there was fix to screen message structure field
responsible for $TERM handling, which makes it impossible to attach to
older versions (hence minor version bump)."

You can try to attach by using /proc/$SCREENPID/exe -x

I get permission denied. I got some new screen session when I executed
it as root, but I certainly did not enter my user's session.

I just opened and asked
for restoring of the 4.3.1-r1 version, at least for a while.

I compiled manually from original tarball but it did not work as I
cannot specify path to the directory with sockets on the command line.

I have /tmp/screen/S-${username} but self-compiled vanilla screen
looked for /tmp/uscreens/S-${username}. The Gentoo documentation says
/var/run/screen/S-${username} and proposes

Seems easiest is to restore the package for the time being.

Try setting the env var SCREENDIR=/tmp/screen/S-${username}

You might need to remove the SUID bit from the screen binary first.

Check the man page for more info.

Michael Parson
Pflugerville, TX

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