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Date: Sun, 28 Jun 2009 12:30:10 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
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Subject: Re: popup consoles on Windows 7
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On Jun 27 09:39, Andy Koppe wrote:
> 2009/6/26 Corinna Vinschen:
> > On Jun 26 15:08, Julio Costa wrote:
> >> I've been following this discussion, crossing fingers to someone came
> >> to some conclusion, as this is the biggest show-stopper for Cygwin in
> >> several months.
> >>
> >> I've not access to a Win 7, but I would like at least to drop some
> >> ideas to someone with more insight comment on and (hopefully) come to
> >> a solution.
> >>
> >> 1) If we make a service (let's call it cygconsole, or include it in
> >> cygserver, whatever), with no desktop interaction, whose only purpose
> >> is to AllocConsole()...
> >> 1.a) do that console gets created?
> >> 1.b) Is it invisible?
> >>
> >> 2) IF the two answers are true, then
> >> 2.a) Do an arbitary process can do an attachconsole to the PID of that service?
> >>
> >> IF it is also an YES, we have a framework for an
> >> workaround/alternative implementation! Cool?
> >
> > It's an interesting idea, but rather tricky to implement.  I assume
> > you will get an ERROR_ACCESS_DENIED when trying to attach to a console
> > of another user, and a cygserver service would usually run under SYSTEM.
> > Relying on a service at all doesn't sound overly tempting, either.  I'm
> > still hoping for another solution.
> 
> How about implementing this idea solely in the Cygwin DLL rather than
> through a service, i.e. the first process that needs a hidden console
> allocates one, and any subsequent processes attach to that.
> 
> Only problem is that the console is automatically freed once all
> processes using it have finished, so a new one would have to be
> allocated again when another process comes along that needs one.

Yeah, that could be an option as a per-session workaround if there's
no other way to accomplish it.


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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