X-Recipient: archive-cygwin@delorie.com X-Spam-Check-By: sourceware.org Date: Mon, 11 Feb 2008 11:38:49 +0100 From: Corinna Vinschen To: cygwin@cygwin.com Subject: Re: Cygwin OCFS support (or lack of) Message-ID: <20080211103849.GM5866@calimero.vinschen.de> Reply-To: cygwin@cygwin.com Mail-Followup-To: cygwin@cygwin.com References: <556c62c70802070907l4d0eaea1v6b58910ab0e24fb1@mail.gmail.com> <20080207181405.GF5866@calimero.vinschen.de> <556c62c70802100047l3af78f57i4ac6400182c78f11@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.16 (2007-06-09) Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: 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 Feb 10 04:18, Robert Pendell wrote: > Well I thought to take my hand at it and see what the strace looked > like. I followed it against a good strace from one of my own local > directories. If you search for fhandler_disk_file::opendir you will > find that it fails with error 2 which appears to make subsequent > attempts to access information fail (errno 89). You will only find one > reference to that handler. Afterwards it silently fails. > > Please correct me if I am wrong here. The opendir works fine. It returns a valid DIR pointer as you can see in the line before the geterrno_from_win_error. What happens looks like this: opendir succeeds. In the first call to readdir, NtQueryDirectoryFile generates a Win32 error 2, "No such file" so readdir fakes a "." directory entry. In the next call NtQueryDirectoryFile generates a Win32 error 18, "No more files". readdir fakes a ".." entry. In the next call NtQueryDirectoryFile generates another Win32 error 18 and readdir finally fails with errno 89, "No more files". The first error, Win32 error 2 is very strange and I have no explanation for this. Maybe it's not enough for OCFS to open the directory handle with FILE_LIST_DIRECTORY access. It might help to use GENERIC_READ in opendir instead. This should be tested by somebody with OCFS access. 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/