Re: screen, try #1

[Christopher Faylor <cgf-no-personal-reply-please at cygwin dot com>]

On Fri, Apr 22, 2005 at 07:57:23AM -0400, Andrew Schulman wrote:
>Using Christopher's patches and disabling FIFOs as suggested, I've built a 
>test version of screen:
>
>http://home.comcast.net/~andrex/cygwin/screen/setup.hint
>http://home.comcast.net/~andrex/cygwin/screen/screen-4.0.2-1.tar.bz2
>http://home.comcast.net/~andrex/cygwin/screen/screen-4.0.2-1-src.tar.bz2
>
>This version runs, but it has several problems:
>
>* Reattaching detached sessions succeeds with Cygwin 1.5.12, but fails with 
>1.5.15.  On host #1 with WinXP + Cygwin 1.5.12-1, reattaching succeeds and I 
>have
>
>$ ll /tmp/uscreens/S-andrex
>total 1
>srw-------  1 andrex None 51 Apr 22 06:05 1944.console.CARBON
>
>On host #2 with WinXP + Cygwin 1.5.15-1, reattaching fails ("There is no 
>screen to be resumed"), and I see
>
>$ ll /tmp/uscreens/S-aschulma
>total 1
>-rw-------  1 ASchulma None 53 Apr 22 06:00 4056.console.D77E1BASCHULMA1
>
>This isn't a socket, which would explain the trouble.
>
>* Video colors become confused sometimes, especially when creating new windows 
>within screen.  For example, twice my whole console window has changed to 
>reverse video, both outside of screen and in all of the windows within 
>screen.  In the properties of the parent console window, the colors were 
>swapped, but changing them back didn't fix the problem; I finally had to 
>close the whole console.  Another time the text color changed to cyan, which 
>happens to be my prompt color.
>
>* Detached sessions are still tied to their parent consoles.  If I detach a 
>session and then exit the parent shell, the shell doesn't exit and the zombie 
>console window stays around.  If I force the console window to close, screen 
>terminates.
>
>There are two different patch sets that people have used to get screen 
>working: Christopher's 
>(http://cygwin.com/ml/cygwin-apps/2005-04/msg00163.html), and the older patch 
>set that Lapo found (http://www.j10n.org/files/screen-4.0.2-cygwin.patch).  I 
>used Christopher's patches to get these results.  I also tried the older one, 
>which is much larger and includes Christopher's.  I found the same 
>reattachment problems, but haven't had time to test the other problems yet.

Some of the patches above look reasonable, especially for getting screen
working on windows 9x.  Adding a "dllimport" to a declaration for a system variable
in a .c file seems like something that should be addressed by using the appropriate
header, however.

I got attach/detach working repeatedly on 1.5.15 (without fifos), so I don't know
why you'd be seeing a problem.

>Should this version be uploaded so people can test it?  I've labeled it 'test' 
>in setup.hint.

It sounds like it is still in a pretty iffy state to me if attach/detach aren't
working.  That's one of the major selling points of screen.

cgf