X-Recipient:	archive-cygwin AT delorie DOT com
X-Spam-Check-By:	sourceware.org
Date:	Mon, 19 Apr 2010 20:49:56 -0400
From:	Christopher Faylor <cgf-use-the-mailinglist-please AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: Spurious 'grep: writing output' in Cygwin 1.7.5-1 in certain cases
Message-ID:	<20100420004956.GB7180@ednor.casa.cgf.cx>
Reply-To:	cygwin AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
References:	<CE4D3C6371BA4722B73A7015133FC9B6 AT ghc DOT local> <4BCCE953 DOT 90204 AT redhat DOT com>
MIME-Version:	1.0
In-Reply-To:	<4BCCE953.90204@redhat.com>
User-Agent:	Mutt/1.5.20 (2009-06-14)
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

On Mon, Apr 19, 2010 at 05:37:55PM -0600, Eric Blake wrote:
>[adding bug-grep]
>
>On 04/19/2010 03:19 PM, Matthew Kidd wrote:
>> We are seeing grep emit 'grep: writing output' multiple times in
>> certain cases where the output of grep is piped to another program.
>> Specifically, we see it in the following cases:
>> 
>>   grep thisandthat foo.txt | head
>>   grep thisandthat foo.txt | less
>
>Expected, if you are blocking SIGPIPE, although it might be improved a
>bit.  Grep is telling you that it encountered a write failure due to
>EPIPE, and is thus about to exit with non-zero status.  Did you paste
>the full error message?  On Linux, I see:
>
>grep: writing output: Broken pipe

Apparently grep isn't seeing an actual EPIPE here for some reason.  I
will look into why that is the case.

cgf

--
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

- Raw text -