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Am 02.04.2012 19:05, schrieb Christopher Faylor:
On Mon, Apr 02, 2012 at 10:07:21AM +0200, Corinna Vinschen wrote:
On Mar 31 14:01, Thomas Wolff wrote:
Am 30.03.2012 13:33, schrieb Corinna Vinschen:
- Fix a bug in controlling tty handling when duplicating a console descriptor.
Hi, when I read this, I wondered whether this bug could be fixed:
but it isn't.
I had later found (and reported to cygwin-developers) that the
terminal response to terminal queries (like cursor position request
or device attribute request) is placed in the wrong buffer because
there are different objects (descriptors?) for stdin and stdout, so
the response would stay in Nirvana and never reach the application.
(And it used to work in CYGWIN=tty mode because curiously, in that
case, the console handles would have been shared for stdin and
Since you seem to have just looked at this area of the console code,
could you give it check?
I cant't find your later mails on the subject in the cygwin-developers
list archive, but I vaguley remember that this was discussed at one
point and nobody had an idea how to implement it without turning the
code upside down.  You're familiar with the fhandler_console code as
well, so maybe you have an idea now how to implement this?
Not so familiar, actually, except with some very specific parts now. But I tried something, see my patch to cygwin-patches and my first comments there.

I don't see how we could accommodate this without switching the console
to "uncooked" mode.  And, as you say, that would have massive effects
on the console code.  I don't think it's worth that much change for such
a relatively unused feature.  Especially since it would make console I/O
I don't see how it should make anything slower. It may not be worth it after all, but there could be a correlation with select() problems (input being delayed and not recognized immediately).
That said, I think the bug should be closed WONT_FIX.
As I indicated on cygwin-patches, it may be worth a check anyway.


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