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Date: Fri, 19 Jul 2013 13:30:09 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: sqlite defect
Message-ID: <20130719113009.GE20871@calimero.vinschen.de>
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References: <trinity-fdc5a0b5-6dcf-4fc0-9370-dd32a75fe928-1373654994500 AT 3capp-gmx-bs47> <51E703FB DOT 1010300 AT etr-usa DOT com> <trinity-1068d666-3dec-43c9-8453-39c7cae3a94c-1374102947415 AT 3capp-gmx-bs33> <51E74AB4 DOT 7010508 AT etr-usa DOT com> <ks87ur$nle$1 AT ger DOT gmane DOT org> <20130718085953 DOT GC9628 AT calimero DOT vinschen DOT de> <ksa6bs$ac9$1 AT ger DOT gmane DOT org> <20130719100329 DOT GC20871 AT calimero DOT vinschen DOT de> <20130719100809 DOT GD20871 AT calimero DOT vinschen DOT de> <ksb4cn$cp8$1 AT ger DOT gmane DOT org>
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User-Agent: Mutt/1.5.21 (2010-09-15)

On Jul 19 19:28, jojelino wrote:
> On 2013-07-19 PM 7:08, Corinna Vinschen wrote:
> > ...and, btw., fcntl(fd, F_SETOWN) is only supported on sockets.
> >
> >
> > Corinna
> >
> 28 55977555 [main] python 5616 open: 9 =
> open(/home/Administrator/....../..............sqlite, 0x58202)
> ..
> ..
>  4680 55982813 [main] python 5616 flock: 0 = flock(9, 6)
> ..
> ..
>    35 55983687 [main] python 5616 seterrno_from_nt_status:
> /netrel/src/cygwin-snapshot-20130619-1/winsup/cygwin/flock.cc:2020
> status 0xC0000055 -> windows error 33
>    26 55983713 [main] python 5616 geterrno_from_win_error: windows
> error 33 == errno 16
>    24 55983737 [main] python 5616 flock: -1 = flock(9, 6), errno 16
> 
> I tried reproducing above failure.

A valid testcase would help a lot, though.  What you meant to do
was calling flock with LOCK_EX|LOCK_NB.

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


Corinna

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