X-Recipient: archive-cygwin@delorie.com X-Spam-Check-By: sourceware.org Date: Thu, 12 Aug 2010 10:11:51 +0200 From: Corinna Vinschen To: cygwin@cygwin.com Subject: Re: 1.7.5: Occasional failure of CreatePipe or signal handing due to thread-unsafe code in cwdstuff::set Message-ID: <20100812081151.GT14202@calimero.vinschen.de> Reply-To: cygwin@cygwin.com Mail-Followup-To: cygwin@cygwin.com References: <3C031C390CBF1E4A8CE1F74DE7ECAF3A140684F0AA@MBX8.EXCHPROD.USA.NET> <20100811084926.GC26152@calimero.vinschen.de> <3C031C390CBF1E4A8CE1F74DE7ECAF3A140684F0B0@MBX8.EXCHPROD.USA.NET> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) 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 Aug 12 06:54, Andy Koppe wrote: > On 11 August 2010 20:55, John Carey wrote: > > On Aug 11 01:49 Corinna Vinschen wrote: > >> there's no Win32-safe way to set a new > >> directory handle as cwd in Vista and later anymore.  Since there's no > >> official API to set the cwd using a directory handle, there's no way to > >> set the Win32 cwd to a directory with restricted permissions. > >> This *is* frustrating. > >> > >> I'll look into another solution.  Probably we will have to call > >> SetCurrentDirectory again and ignore any error.  I don't accept the > >> aforementioned restriction for POSIX calls. > > > > So is your idea that if SetCurrentDirectory() fails because > > of path length or permissions, then Cygwin would just accept > > the failure and keep an internal record the > > POSIX current working directory and use that for all > > Cygwin calls, not the Win32 notion of current directory? > > Yes. The question then becomes what to do about the Win32 working > directory in that case. Actually, Cygwin accepts *any* directory it can open as CWD: - Directories which can only be opened under SE_BACKUP_NAME. - Directories with a length up to 32768 chars. - Virtual directories, which don't exist at all as filesystem-based paths, like /proc, /cygdrive, etc. Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Project Co-Leader cygwin AT cygwin DOT com Red Hat -- 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