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Date: Wed, 28 Apr 2010 19:50:05 +0200
From: Alexandre Bezroutchko <abb AT gremwell DOT com>
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To: cygwin AT cygwin DOT com
Subject: Re: 'screen' started in detached mode -- cannot reattach
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Andrew,

Yes, I understand that it is not possible for you to invest too much
time into an exotic bug like this one. Thank you for the response.

Apparently, reattaching works from rxvt if the detached 'screen' process
was launched from the console. With a little bit of luck it let me
continue using cygwin/screen for my project, because I am spawning
'screen -d -m' from another process.

Regards,
Alex

Andrew Schulman wrote:
>> I start 'screen -d -m MYCOMMAND' and it goes into background, as
>> intended. However, I cannot reattach to it, the reattaching 'screen'
>> process hangs. It is easy to reproduce:
>>
>> sh-3.2# screen -d -m sleep 1000
>>
>> sh-3.2# screen -ls
>> There is a screen on:
>>         1072..rock      (Detached)
>> 1 Socket in /tmp/screens/S-abb.
>>
>> sh-3.2# screen -r
>> ...
>>     
>
> Alexandre, thanks for the report.  I've never tried to start screen in
> detached mode before, so I never enountered this.  But I can confirm it
> here.  For me the results are a little different-- the terminal doesn't
> hang, but it stops echoing keyboard input and newlines.  I have to run
> 'reset' to get it working again.  And after that, screen -ls lists the
> detached session as dead.
>
> Clearly this is a bug in screen, and it seems to be specific to Cygwin.  I
> can't reproduce it on my Ubuntu host.
>
> Unfortunately, this is likely to be hard to solve.  I don't have the
> knowledge or time to debug it myself.  You can report it to the
> screen-users mailing list, but since it appears to be Cygwin-specific,
> they're likely to send you back here.
>
> Sorry.  There is something about the way screen uses sockets that doesn't
> work completely right in Cygwin, and no one has ever figured out what it
> is.  Mostly it does work right, and with the release of Cygwin 1.7 I'd
> hoped we were done with it.
>
> Andrew.
>
>
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