X-Recipient: archive-cygwin AT delorie DOT com
X-Spam-Check-By: sourceware.org
Date: Sun, 3 Jan 2010 14:11:21 -0500
From: Christopher Faylor <cgf-use-the-mailinglist-please AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: select() and named pipes
Message-ID: <20100103191121.GA17057@ednor.casa.cgf.cx>
Reply-To: cygwin AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
References: <20091222224309 DOT GA3504 AT GIOVE>  <20091223003714 DOT GA4491 AT ednor DOT casa DOT cgf DOT cx>  <20091223021219 DOT GA5836 AT GIOVE>  <20100103165846 DOT GA3284 AT GIOVE>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20100103165846.GA3284@GIOVE>
User-Agent: Mutt/1.5.20 (2009-06-14)
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
Precedence: bulk
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 Sun, Jan 03, 2010 at 05:58:46PM +0100, Enrico Forestieri wrote:
>On Wed, Dec 23, 2009 at 03:12:19AM +0100, Enrico Forestieri wrote:
>> On Tue, Dec 22, 2009 at 07:37:14PM -0500, Christopher Faylor wrote:
>> > On Tue, Dec 22, 2009 at 11:43:09PM +0100, Enrico Forestieri wrote:
>> > >I am experiencing a problem with select() and named pipes in cygwin
>> > >1.7.  The attached test case segfaults on the select() call, but works
>> > >fine with both cygwin 1.5 and linux.
>> > 
>> > Thanks for the test case.  This should be fixed in the next Cygwin
>> > snapshot but it will not be fixed (of course?) in 1.7.1 which is now
>> > available from the Cygwin web site.
>> 
>> I confirm that with the 20091222 snapshot the crash does not occur
>> anymore. However, there's still something wrong. Indeed, running the
>> test case in a terminal and issuing "echo foo > /tmp/pipe" from another
>> one, the program exits without printing the expected "foo".
>
>Apparently, the problem is due to the O_NONBLOCK flag used in the open()
>call. Taking away O_NONBLOCK, everything works.

I'm still tinkering with fifos.  I hope to have some fixes for Cygwin 1.7.2
but no guarantees.

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