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
Date:	Mon, 20 Sep 2004 10:38:19 -0400
From:	Christopher Faylor <cgf-no-personal-reply-please AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: Running cmd programs in cygwin / rxvt
Message-ID:	<20040920143819.GC6915@trixie.casa.cgf.cx>
Reply-To:	cygwin AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
References:	<414E8B1A DOT 8040103 AT overbored DOT net> <414EA28E DOT 122EB347 AT dessent DOT net>
Mime-Version:	1.0
In-Reply-To:	<414EA28E.122EB347@dessent.net>
User-Agent:	Mutt/1.4.1i

On Mon, Sep 20, 2004 at 02:27:42AM -0700, Brian Dessent wrote:
>overbored wrote:
>>There are some cmd shell programs that don't run well in rxvt.  Most
>>noticeably, they don't always immediately write out their output.  They
>>seem to work fine in the default cmd window though (doesn't matter if
>>it's in cmd or in bash).  Does anybody know what the problem is here,
>>and how to fix it?  Thanks in advance.
>
>What you're seeing is caused by the output of the program going through
>a tty (or pty as the case may be.) When you run it from a straight
>cmd.exe it's not using tty code (unless you have CYGWIN=tty set.) From
>my meagre knowledge of the subject it has to do with the program not
>explicitly flushing stdout (or not knowing that it needs to as this is
>usually not required under windows.)

That's more or less correct.  The larger problem is that ptys are
actually pipes under the hood and some native programs don't deal well
with having pipes for their stdin and stdout.  They either don't flush
their output correctly or they refuse to output anything at all.

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 -