X-Recipient: archive-cygwin@delorie.com X-Spam-Check-By: sourceware.org Date: Sun, 3 Jan 2010 14:11:21 -0500 From: Christopher Faylor To: cygwin@cygwin.com Subject: Re: select() and named pipes Message-ID: <20100103191121.GA17057@ednor.casa.cgf.cx> Reply-To: cygwin@cygwin.com Mail-Followup-To: cygwin@cygwin.com References: <20091222224309.GA3504@GIOVE> <20091223003714.GA4491@ednor.casa.cgf.cx> <20091223021219.GA5836@GIOVE> <20100103165846.GA3284@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@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.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