X-Recipient:	archive-cygwin AT delorie DOT com
X-SWARE-Spam-Status:	No, hits=-1.0 required=5.0 tests=AWL,BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,RCVD_IN_DNSWL_NONE,T_TO_NO_BRKTS_FREEMAIL
X-Spam-Check-By:	sourceware.org
Message-ID:	<906049.55360.qm@web25501.mail.ukl.yahoo.com>
Date:	Sat, 25 Sep 2010 12:52:10 +0000 (GMT)
From:	Marco Atzeri <marco_atzeri AT yahoo DOT it>
Subject:	Re: 1.7.7(0.230/5/3) - Cannot change mode of file, and other permission issues on a Windows fileshare
To:	cygwin AT cygwin DOT com
In-Reply-To:	<20100924162826.GA25401@calimero.vinschen.de>
MIME-Version:	1.0
X-IsSubscribed:	yes
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

--- Ven 24/9/10, Corinna Vinschen ha scritto:


> On Sep 24 08:49, Keith Christian
> wrote:
> > > Does a call to chmod fail as well? =A0If so, can
> you create an strace of
> > > such a chmod, like this:
> > >
> > > =A0$ touch foo
> > > =A0$ strace -o chmod.trace chmod 444 foo
> > >
> > > and send the chmod.trace file to the list?
> >=20
> >=20
> >=20
> > Thanks, Corinna,
> >=20
> > Yes, I receive "chmod: changing permissions of `foo':
> Permission
> > denied" when executing chmod 444 foo.
>=20
> Here's the problem:
>=20
>  fhandler_base::open: C0000022 =3D NtCreateFile (0x0, E0100,
> \??\Z:\foo, io, NULL, 0, 7, 1, 4000, NULL, 0)
>=20
> Cygwin tries to open the file for writing the control
> information
> requesting WRITE_DAC and WRITE_OWNER access, but the remote
> filesystem
> refuses the request with an "Access denied" status code.
>=20
> I was going to say that we can't do anything against that,
> but then
> it occured to me that this isn't quite right.=A0
> Actually we don't
> need WRITE_OWNER access for the chmod functionality, so
> it's perhaps=20
> still possible to call chmod on that remote filesystem if
> cygwin omits
> the WRITE_OWNER access flag when opening the file.
>=20
> I applied a tiny patch to Cygwin, which only requests
> WRITE_DAC, not
> WRITE_OWNER in calls to chmod.=A0 Please test the next
> developer's
> snapshot from http://cygwin.com/snapshots/ and see if
> it fixes your
> problem.=A0 If you still get "Permission denied", it's
> actually a problem
> of the server which doesn't allow to change the ACL of a
> file via the
> share for some reason.
>=20
>=20
> Corinna
>=20

I noticed on XP SP2, Xserver (1.8.2) crashing on=20
start with snapshot 20100924 while it runs fine=20
with 20100923.
Anyone noticed the same ?

Usual invocation from Menu:
C:\cygwin2\bin\run.exe /usr/bin/bash.exe -l -c /usr/bin/startxwin.exe

Marco







--
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 -