X-Recipient:	archive-cygwin AT delorie DOT com
DKIM-Filter:	OpenDKIM Filter v2.11.0 sourceware.org ED23D3858003
DKIM-Signature:	v=1; a=rsa-sha256; c=relaxed/relaxed; d=cygwin.com;
	s=default; t=1641378938;
	bh=YZugdgkOh038y5kq6HZEGZSZMdPRAAoPXyLumfn28fw=;
	h=Date:From:To:Subject:References:In-Reply-To:List-Id:
	List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe:
	Reply-To:From;
	b=QdW6dbuJmRQV4ab1hO4/JvmYdn868hBdyAVf4YLBzi8wzShzKUNxzVgdwmIHCdSin
	UXQuuue1m2VmR0MIO+TLxki9PCuUp5DlIk08U76/9D9AZys9jCMwgktw8KyHg0ImIn
	XZBQ1f4PjTPnBv017qFoW1KoiXtoLC+xCR7c7ETo=
X-Original-To:	cygwin AT cygwin DOT com
Delivered-To:	cygwin AT cygwin DOT com
DMARC-Filter:	OpenDMARC Filter v1.4.1 sourceware.org A20A93858002
Authentication-Results:	sourceware.org;
	dmarc=fail (p=none dis=none) header.from=cygwin.com
Authentication-Results:	sourceware.org; spf=fail smtp.mailfrom=cygwin.com
Date:	Wed, 5 Jan 2022 11:34:16 +0100
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: A notion about saving and restoring Windows file security info
Message-ID:	<YdV0KNw+hZ5iS1AC@calimero.vinschen.de>
Mail-Followup-To:	cygwin AT cygwin DOT com
References:	<4c5fda33-8f7e-53d2-85ce-28eb11cfb978 AT cs DOT umass DOT edu>
MIME-Version:	1.0
In-Reply-To:	<4c5fda33-8f7e-53d2-85ce-28eb11cfb978@cs.umass.edu>
X-Provags-ID:	V03:K1:4jJPjKr4fg3WNd97N/TEgi62G7NnOVR3oGGooXjLk6LJlVYE3lA
	VVWdVAFJwgJZY5g3o6XMY9KkguibLh/ki0hoKvdOrDcEwgg6cZHP4gMMrDB39Qd2dULnrNT
	XDiM2v4PPFZtTf/Bc9yQrBw6Nu5lukWqC6fsjrWAlfNScPSWsyQk+8+jt6pejc2EanCBHWe
	UUaJuFdY8G/EmEGnPLtrQ==
X-UI-Out-Filterresults:	notjunk:1;V03:K0:eMucqNjVYEE=:qwXviKDEPeJ3IFX1mAejVb
	hlk9wk24EDDqZ0D2FEU5s2Asr5P0d1kD1mQHipik66h9bmhfEkhqKuKqT0RJqPZ7w9SfKUPye
	3q/pUFEofVMpSraH0D2cgTriQYswkXxnwGJBgjVVFiCqVKjvX8zfVdmuTda5rUG/H7estYf8D
	A8vbAgIoFQepxakcg+QmQmrZRPJAiiSc1bGStwHCrRz77eOpZab1XunEcN8BSEKAy++bxrQHz
	N2bN3TMueo0H/tQ9tn2cY4wAoLTcc5uq5JrpsCwcAnIPKXZ4q/82715pish/Y/Bu+zExqqS0Z
	QpqaPqbNnXXxv7kg0UR42f6EJzL/COXSLKYkbh2PYXHW7fjaP5G5SrXq2vc2Me4LS/isFb7WO
	MiPeP2B0TycqrE/2414a0sjIf7hYWRQtlT15b7QFqoLOWfC1NDW8M0ltmSlRJgOOcD1XnWTDp
	5uaoYE4DCojRcv7eqEX745uSzaZhBeGi5HmKCRl0FTKxEkC6011FgdiUZQ3pxaPlGlccF3iMC
	N0COcTjbiUREnu6JZxOfoAGrfGli/vdjgqwv5IqnooUF+Ad8wNIsnS+K4bexRKofuO2NxdxuP
	4Tog6BQrJbXq71M8SmWxtSDDf2fscFU76/f8Ivl9cUk18u9kWB8ILyO+yNt1lpm/ruJeS9YHA
	iqjW85aNRm0gKZzUobkbQmRQZfMlWheS2Vzn7EhHxpU8IQ6stZTXimTWgUstdHMEbIueoE0zG
	kzc7Sf3voha3/sDb
X-Spam-Status:	No, score=-75.5 required=5.0 tests=BAYES_00,
	GOOD_FROM_CORINNA_CYGWIN, KAM_DMARC_NONE, KAM_DMARC_STATUS, RCVD_IN_MSPIKE_H2,
	SPF_FAIL, SPF_HELO_NONE, TXREP autolearn=ham autolearn_force=no version=3.4.4
X-Spam-Checker-Version:	SpamAssassin 3.4.4 (2020-01-24) on
	server2.sourceware.org
X-BeenThere:	cygwin AT cygwin DOT com
X-Mailman-Version:	2.1.29
List-Id:	General Cygwin discussions and problem reports <cygwin.cygwin.com>
List-Unsubscribe:	<https://cygwin.com/mailman/options/cygwin>,
	<mailto:cygwin-request AT cygwin DOT com?subject=unsubscribe>
List-Archive:	<https://cygwin.com/pipermail/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-request AT cygwin DOT com?subject=help>
List-Subscribe:	<https://cygwin.com/mailman/listinfo/cygwin>,
	<mailto:cygwin-request AT cygwin DOT com?subject=subscribe>
Reply-To:	cygwin AT cygwin DOT com
Errors-To:	cygwin-bounces+archive-cygwin=delorie DOT com AT cygwin DOT com
Sender:	"Cygwin" <cygwin-bounces+archive-cygwin=delorie DOT com AT cygwin DOT 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

- Raw text -