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Date: Mon, 26 Jun 2006 14:17:55 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: autossh broken with current openssh/cygwin
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References: <449CAF28 DOT BB172C1A AT dessent DOT net>
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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

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