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Date: Tue, 3 Dec 2013 11:31:29 +0100
From: Corinna Vinschen <corinna-cygwin@cygwin.com>
To: cygwin@cygwin.com
Subject: Re: emacs-x11: new clipboard size limitation?
Message-ID: <20131203103129.GG11800@calimero.vinschen.de>
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References: <ac98a224051c2e59d2a1a0d455717531@mhoenicka.de> <529C8716.7020601@dronecode.org.uk> <20131202141740.GC11800@calimero.vinschen.de> <529C9F81.5060900@dronecode.org.uk>
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On Dec  2 14:56, Jon TURNEY wrote:
> On 02/12/2013 14:17, Corinna Vinschen wrote:
> > On Dec  2 13:11, Jon TURNEY wrote:
> >> What you write does seem to support the theory that this is a regressi=
on in
> >> select() in the cygwin DLL.  It might be useful if you could say what =
version
> >> of the cygwin DLL you had when it was working correctly before you upg=
raded.
> >>
> >> [1] http://cygwin.com/ml/cygwin-xfree/2013-10/msg00031.html
> >> [2] http://cygwin.com/ml/cygwin-xfree/2013-11/msg00012.html
> >=20
> > Are you sure this is a select problem?  If so, can you create an STC,
> > perhaps?
>=20
> "Only a madman is absolutely sure".  I'm afraid the best test case I have=
 a
> the moment is:
>=20
> Install xorg-server-debuginfo
> Start XWin -noclipboard -multiwindow
> Start xwinclip under gdb, and place a breakpoint at wndproc.c:133, and ru=
n it
> Start emacs-x11, open the Shakespeare text from [1] in a buffer
> Open notepad
> Copy and paste the text from the emacs buffer into notepad
> The breakpoint is hit.  Notice that select() has returned 0, the read rea=
dy
> fd_set is empty and the timeout hasn't expired. I claim that the read rea=
dy
> fd_set should indicate that the X connection socket is ready.

Well, that's not exactly an STC...

So, IIUC, you're saying that, in fact, select doesn't return too early,
rather it returns without setting the return value correctly.  You
expect it to return a value > 0, right?


Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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