X-Recipient: archive-cygwin@delorie.com X-Spam-Check-By: sourceware.org Date: Mon, 9 Mar 2009 11:34:18 +0100 From: Corinna Vinschen To: cygwin@cygwin.com Subject: Re: MSG_DONTWAIT on recvfrom Message-ID: <20090309103418.GT31459@calimero.vinschen.de> Reply-To: cygwin@cygwin.com Mail-Followup-To: cygwin@cygwin.com References: <49B4E952.3050003@mrc-lmb.cam.ac.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <49B4E952.3050003@mrc-lmb.cam.ac.uk> User-Agent: Mutt/1.5.19 (2009-02-20) 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 Mar 9 10:02, T. Horsnell wrote: > I'm trying to use recvfrom in non-blocking mode with the MSG_DONTWAIT flag, > and I get an undefined name for MSG_DONTWAIT at compile time. > A trawl through the mail archives gave a reference to this in 2001 > which said: > > "Download the source for cygwin1.dll and implement MSG_DONTWAIT" > > Is this still the case (I have a recent cygwin with cygwin1.dll 1.5.25) > or is there a more straightforward fix? MSG_DONTWAIT isn't supported by Winsock and it's not supported by Cygwin either. I put this on my TODO list for a later release but keep in mind that MSG_DONTWAIT is a non-standard socket extension not backed by POSIX. Consider to use O_NONBLOCK with the F_SETFL fcntl command instead. Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Project Co-Leader cygwin AT cygwin DOT com Red Hat -- 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/