X-Recipient:	archive-cygwin AT delorie DOT com
X-Spam-Check-By:	sourceware.org
Date:	Thu, 12 Aug 2010 10:11:51 +0200
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT 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 AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
References:	<3C031C390CBF1E4A8CE1F74DE7ECAF3A140684F0AA AT MBX8 DOT EXCHPROD DOT USA DOT NET> <20100811084926 DOT GC26152 AT calimero DOT vinschen DOT de> <3C031C390CBF1E4A8CE1F74DE7ECAF3A140684F0B0 AT MBX8 DOT EXCHPROD DOT USA DOT NET> <AANLkTimpBCKzUioEarGiKMQbTjN+6s9iDYm_zzZ2Lxr9 AT mail DOT gmail DOT com>
MIME-Version:	1.0
In-Reply-To:	<AANLkTimpBCKzUioEarGiKMQbTjN+6s9iDYm_zzZ2Lxr9@mail.gmail.com>
User-Agent:	Mutt/1.5.20 (2009-06-14)
Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id:	<cygwin.cygwin.com>
List-Unsubscribe:	<mailto:cygwin-unsubscribe-archive-cygwin=delorie DOT com AT cygwin DOT com>
List-Subscribe:	<mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive:	<http://sourceware.org/ml/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender:	cygwin-owner AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
Delivered-To:	mailing list cygwin AT cygwin DOT 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

- Raw text -