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Date: Fri, 19 Jul 2013 14:02:42 +0200
From: Corinna Vinschen <corinna-cygwin@cygwin.com>
To: cygwin@cygwin.com
Subject: Re: sqlite defect
Message-ID: <20130719120242.GH20871@calimero.vinschen.de>
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On Jul 19 20:53, jojelino wrote:
> On 2013-07-19 PM 8:30, Corinna Vinschen wrote:
> >A valid testcase would help a lot, though.  What you meant to do
> >was calling flock with LOCK_EX|LOCK_NB.
> >
> that's what exactly sqlite3 that uses the mandatory-locking did.
> reproducing the behavior was i meant to do.
> >And then again, your testcase works as designed.  Not by me, but by
> >Microsoft.  You can't overwrite an existing lock, even if hold by the
> >same file handle.  See http://cygwin.com/cygwin-api/std-notes.html
> >
> Yes. the testcase works without mandatory locking. so i hope next
> sqlite3 release doesn't use mandatory locking feature of cygwin.
> someone who have plenty of time to waste digging into sqlite3 source
> code would come with workaround to the problem.

There *is* a workaround:

  export CYGWIN_SQLITE_LOCKING=posix

See http://cygwin.com/ml/cygwin-announce/2013-06/msg00014.html


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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