Message-Id: <200410140612.i9E6CUYZ018567@delorie.com>
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com
From: "Gary R. Van Sickle" <g DOT r DOT vansickle AT worldnet DOT att DOT net>
To: <cygwin AT cygwin DOT com>
Subject: RE: non-interactive cygwin setup
Date: Thu, 14 Oct 2004 01:12:20 -0500
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
In-Reply-To: <20041013210453.GJ8866@trixie.casa.cgf.cx>
X-IsSubscribed: yes

[snip]
> >I thought if a GUI app called printf it generally caused a 
> console to 
> >be opened for it.  Maybe that's only with msvcrt.  In any case, the 
> >fact is that it is being run from a cmdline and so it certainly can 
> >communicate with the console.  The presence of command-line 
> options in 
> >argc/argv could be taken as a fairly strong hint that it was 
> being run 
> >from a shell rather than an icon.  And there's always 
> "isatty (1)" if 
> >you really really want to be sure.
> 
> This is a windows limitation.  GUI apps (apps created with 
> -mwindows) can't send output to or receive input from the 
> console.  Of course, a GUI can interpret command line 
> information.  It just cannot send output to the console that 
> started it.
> 
> You could use AllocConsole to create a separate console which 
> the GUI could then use, however.

Here's a maybe-less-icky way to do it.  Have two exes, one "setup.exe" which
is a 100% command-line program that normally just spawns "winsetup.exe", the
current GUI setup, and goes away.  Give it "--help", and it prints help in
the regular command-line way and exits.  Yeah, two exes, but worse tragedies
have happened.

-- 
Gary R. Van Sickle
 


--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/