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Re: [screen-devel] screen cannot reattach to previous session

From: Jürgen Weigert
Subject: Re: [screen-devel] screen cannot reattach to previous session
Date: Wed, 9 Sep 2015 11:21:41 +0200

A good test is to grab the old screen binary from some not yet updated installation and try the reattach. Comment 2 says that succeeds. This is a strong indicator that we have a changed struct msg.

Please make sure that we always increment the message version counter when we change struct msg!

Cheers, JW

Am 08.09.2015 16:26 schrieb "Amadeusz Sławiński" <address@hidden>:
On Tue, 8 Sep 2015 12:08:54 +0200
Petr Hracek <address@hidden> wrote:

> On 08/31/2015 07:41 PM, Amadeusz Sławiński wrote:
> >> I have received a bug
> >>
> >> which causes that screen indefinite hangs.
> >>
> >> Strace is a part of the bug.
> >> Did you ever discover this problem?
> >>
> >> This bug was discovered in screen-4.1.0.
> > Hi,
> >
> > I recall that someone on irc had similar problem, it seemed like
> > his /dev/pts was being mounted with wrong options
> > it needed something like those mount options to work:
> > "gid=5,mode=620" (group 5 being tty on my system).
> >
> > Amadeusz
> >
> Hi,
> they provided a options:
> /dev/pts mount:
> $ mount | grep pts
> devpts on /dev/pts type devpts
> (rw,nosuid,noexec,relatime,seclabel,gid=5,mode=620,ptmxmode=000)
> But it seems that it is not working still.
> What about ptmxmode?
> Could it be relevant?


I don't think so, mine is also 000.
As far as I can see from bugreport it happens between updates.
What was version before and after update?
Also do you have somewhere diff between those versions?

It can be that there is some difference in "struct msg" between
versions which causes this problem.

Does it only fails to reattach after update?
By which I mean, does new sessions after update attach properly?


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