X-Recipient: archive-cygwin@delorie.com X-SWARE-Spam-Status: No, hits=2.3 required=5.0 tests=AWL,BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,RCVD_IN_DNSWL_LOW X-Spam-Check-By: sourceware.org Received-SPF: pass (google.com: domain of nick.lowe@gmail.com designates 10.52.23.5 as permitted sender) client-ip=10.52.23.5; Authentication-Results: mr.google.com; spf=pass (google.com: domain of nick.lowe@gmail.com designates 10.52.23.5 as permitted sender) smtp.mail=nick.lowe@gmail.com; dkim=pass header.i=nick.lowe@gmail.com MIME-Version: 1.0 In-Reply-To: References: Date: Tue, 21 Feb 2012 09:10:45 +0000 Message-ID: Subject: Re: shared_info::init_obcaseinsensitive implemented incorrectly From: Nick Lowe To: cygwin@cygwin.com Content-Type: text/plain; charset=ISO-8859-1 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 Grr, I hit send before finishing writing this. I meant to write: "Then, check for existence of the uppercase or lowercase form of the path (choose appropriate casing based on the existing casing) with NtQueryAttributesFile ensuring, obviously, that the OBJ_CASE_INSENSITIVE flag is not set." Cheers, Nick On Tue, Feb 21, 2012 at 8:59 AM, Nick Lowe wrote: > Dear Cygwin Developers, > > shared_info::init_obcaseinsensitive in shared.cc has, in my opinion, > been implemented incorrectly. > > The value of the obcaseinsensitive value in the registry only > represents how the object manager will be on next reboot and not its > present state. Cygwin uses it as if it represents the present state, > however. This is likely to be true, but is not guaranteed to be. > > To determine the present state, first get the system root path via either: > > 1) Querying the %SystemRoot% environment variable via > RtlExpandEnvironmentStrings_U and change it with > RtlDosPathNameToNtPathName_U (alternatively > RtlDosPathNameToNtPathName_U_WithStatus in Vista and later). > > 2) Querying the symbolic link target of \SystemRoot via > NtQuerySymbolicLinkObject. (Requires administrative rights.) > > Then, check for existence of the uppercase form of the path with > NtQueryAttributesFile ensuring, obviously, that the > OBJ_CASE_INSENSITIVE flag is not set. > > If the the NTSTATUS value is successful, the object manager is running > with case insensitivity, if not its running with case sensitivity. > > With regards, > > Nick Lowe -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple