DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org A20A93858002
Date: Wed, 5 Jan 2022 11:34:16 +0100
From: Corinna Vinschen <corinna-cygwin@cygwin.com>
To: cygwin@cygwin.com
Subject: Re: A notion about saving and restoring Windows file security info
Message-ID: <YdV0KNw+hZ5iS1AC@calimero.vinschen.de>
Mail-Followup-To: cygwin@cygwin.com
References: <4c5fda33-8f7e-53d2-85ce-28eb11cfb978@cs.umass.edu>
MIME-Version: 1.0
Content-Disposition: inline
In-Reply-To: <4c5fda33-8f7e-53d2-85ce-28eb11cfb978@cs.umass.edu>
Precedence: list
Reply-To: cygwin@cygwin.com
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Errors-To: cygwin-bounces+archive-cygwin=delorie.com@cygwin.com
Sender: "Cygwin" <cygwin-bounces+archive-cygwin=delorie.com@cygwin.com>

On Jan  4 22:45, Eliot Moss wrote:
> Dear Cygwiners - Maybe this idea has been discussed before, and I can't say I
> exactly have a specific application in mind, but I was wondering about how one
> might achieve reliable backup/restore of files on a Windows system via a
> backup program written to the POSIX interface and ported to Windows via
> Cygwin.
> 
> The idea is this: expose the Windows file attributes (such as system, archive,
> hidden, etc.) as well as security descriptors (such as managed by icacls), via
> specifically named extended attributes, those read/written by get/setfattr.
> The Cygwin library could be enhanced to "know" the special names of these
> attributes and use the appropriate, different, underlying calls to get/set
> them.
> 
> Is this a crazy idea?  A useful one?  (How useful?)  What implementation
> effort would be required?

It would be possible with not too much effort.  That would need a bit
of discussion, for instance, do we want to show up the native ACL in
listxattr?


Corinna

-- 
Problem reports:      https://cygwin.com/problems.html
FAQ:                  https://cygwin.com/faq/
Documentation:        https://cygwin.com/docs.html
Unsubscribe info:     https://cygwin.com/ml/#unsubscribe-simple