X-Recipient:	archive-cygwin AT delorie DOT com
X-Spam-Check-By:	sourceware.org
Date:	Thu, 15 Jan 2009 00:59:17 -0500
From:	Christopher Faylor <cgf-use-the-mailinglist-please AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: console vs pty (was: Re: First Pass at mintty documentation; etc.)
Message-ID:	<20090115055917.GA19035@ednor.casa.cgf.cx>
Reply-To:	cygwin AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
References:	<496A5EDE DOT 9010204 AT veritech DOT com> <496A7038 DOT 402 AT gmail DOT com> <496B7C25 DOT 3090705 AT veritech DOT com> <496E528D DOT 1090801 AT gmail DOT com> <496E7E4F DOT 6060706 AT gmail DOT com> <496ECD29 DOT 8010804 AT gmail DOT com>
MIME-Version:	1.0
In-Reply-To:	<496ECD29.8010804@gmail.com>
User-Agent:	Mutt/1.5.16 (2007-06-09)
Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id:	<cygwin.cygwin.com>
List-Unsubscribe:	<mailto:cygwin-unsubscribe-archive-cygwin=delorie DOT com AT cygwin DOT com>
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
Note-from-DJ:	This may be spam

On Thu, Jan 15, 2009 at 05:44:09AM +0000, Andy Koppe wrote:
>Chuck Wilson wrote:
>>"full screen" or "DOS" is a red herring.  Any program that does
>>something like the following, if compiled as a native program, won't
>>work in rxvt (or MinTTY, or cygwin/cmd-shell-with-CYGWIN=tty):
>>
>> #include <stdio.h>
>> main() {
>>   int c;
>>   while ((c = getc(stdin)) != EOF) fputc(c, stdout);
>> }
>>
>>The thing is, THIS program works as part of a pipeline even when
>>compiled as a native program -- but it breaks if you try to use it
>>interactively within rxvt/MinTTY/etc.  A cygwin-compiled version works
>>in all cases.
>
>I see, thanks for explaining that.  What exactly does happen when
>calling read() that means that pty input doesn't reach the program?

It's buffered differently.  MSVCRT thinks that Cygwin's ptys are pipes so
it buffers the input like a pipe rather than a terminal.

cgf

--
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/

- Raw text -