Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm 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 Date: Wed, 26 Mar 2003 09:52:21 +0100 From: Corinna Vinschen To: cygwin@cygwin.com Subject: Re: Failed non-blocking connect returns incorrect errno on AF_UNIX protocol Message-ID: <20030326085220.GQ23762@cygbert.vinschen.de> Reply-To: cygwin@cygwin.com Mail-Followup-To: cygwin@cygwin.com References: <3E80F8E1.2000409@linuxforum.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3E80F8E1.2000409@linuxforum.net> User-Agent: Mutt/1.4i On Wed, Mar 26, 2003 at 08:48:33AM +0800, David Huang wrote: > Failed non-blocking connect returns incorrect errno on AF_UNIX protocol. > See attached test program. > > On cygwin: > $ ./afunix > EINPROGRESS: Operation now in progress > > On > Linux 2.4 (Debian 2.2) > Linux 2.4 (Redhat 7.3) > Sun Solaris (8): > $ ./afunix > ECONNREFUSED: Connection refused > > When i comment following code: > // if (fcntl (fd2, F_SETFL, O_NONBLOCK) < 0) > // printf ("Failed to set fd non-blocking"); > The result is > ECONNREFUSED: Connection refused > > It seems an old bug. > I don't know whether it effect others address/protocol families. I don't see that it's an error. On non-blocking sockets you have to expect that connect() returns before being connected. Just because other systems are so quick figuring out that nothing is listening on the other side, this doesn't invalidate the EINPROGRESS response under, well, slower conditions. And, btw., SUSv3 doesn't say a word that EINPROGRESS is not a valid response for AF_LOCAL sockets. Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Developer mailto:cygwin@cygwin.com Red Hat, Inc. -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Bug reporting: http://cygwin.com/bugs.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/