X-Recipient: archive-cygwin@delorie.com
X-SWARE-Spam-Status: No, hits=-2.5 required=5.0 	tests=AWL,BAYES_00,SPF_PASS
X-Spam-Check-By: sourceware.org
Message-ID: <4AFF05F3.5060706@gmail.com>
Date: Sat, 14 Nov 2009 19:33:07 +0000
From: Dave Korn <dave.korn.cygwin@googlemail.com>
User-Agent: Thunderbird 2.0.0.17 (Windows/20080914)
MIME-Version: 1.0
To: cygwin@cygwin.com
Subject: Re: How to capture stderr of dos process running in bash shell??
References: <26341304.post@talk.nabble.com>  <4AFE14EB.5020305@gmail.com> <20091114185556.GA15089@ednor.casa.cgf.cx>
In-Reply-To: <20091114185556.GA15089@ednor.casa.cgf.cx>
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm
List-Id: <cygwin.cygwin.com>
List-Subscribe: <mailto:cygwin-subscribe@cygwin.com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin@cygwin.com>
List-Help: <mailto:cygwin-help@cygwin.com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner@cygwin.com
Mail-Followup-To: cygwin@cygwin.com
Delivered-To: mailing list cygwin@cygwin.com

Christopher Faylor wrote:

> But that is clearly not the case here since stdout and stderr are being
> bypassed and text is still showing up on the screen.  That is not a symptom
> of stdout/stderr being attached to a pipe.
> 
> Although, hmm, on rereading it isn't clear that the output shows up on
> the screen.  It sounds like the DOS program just might not differentiate
> between stdout and stderr.

  I checked: you can't redirect its error output at all, even in a genuine
cmd.exe shell with cygwin having nothing to do with it.  It must indeed be
using the console directly.  <checks imports>  Curiouser and curiouser... it
links msvcrt.dll and imports printf and wprintf, but then it goes and actually
does everything the hard way with lowlevel console i/o in unicode.  How peculiar.

    cheers,
      DaveK


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