X-Spam-Check-By: sourceware.org Date: Mon, 26 Jun 2006 14:17:55 +0200 From: Corinna Vinschen To: cygwin@cygwin.com Subject: Re: autossh broken with current openssh/cygwin Message-ID: <20060626121755.GF11077@calimero.vinschen.de> Reply-To: cygwin@cygwin.com Mail-Followup-To: cygwin@cygwin.com References: <449CAF28.BB172C1A@dessent.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <449CAF28.BB172C1A@dessent.net> User-Agent: Mutt/1.4.2i Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk 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 Jun 23 20:19, Brian Dessent wrote: > > I'm not sure if it is due to changes in openssh, or changes in Cygwin, > but the current autossh package fails to work. Instead of detecting > that the connection is alive, it seems to continuously timeout and > recycle the ssh process. Here is a representative testcase: > > $ AUTOSSH_FIRST_POLL=5 AUTOSSH_POLL=5 AUTOSSH_DEBUG=yes autossh -M 30000 > -N dessent.net > autossh: PID 3204: short poll time: adjusting net timeouts to 2500 > autossh: PID 3204: checking for grace period, tries = 0 > autossh: PID 3204: starting ssh (count 1) > autossh: PID 3204: ssh child pid is 4160 > autossh: PID 4160: execing /usr/bin/ssh > autossh: PID 3204: check on child 4160 > autossh: PID 3204: set alarm for 5 secs > autossh: PID 3204: timeout on io poll, looping to accept again Confirmed. This has been introduced by trying to get the WinSock event driven accept thread-safe. This apparently doesn't work as expected. To get that really right, a lot more has to be done. Since that's nothing I'd like to rip apart before 1.5.20, I reverted all event handling for accept and connect and returned to using select again, as it was implemented until 1.5.18. 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/