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Date:	Wed, 19 Dec 2018 16:19:50 +0100
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: Exclude System entries with "ls" or "find"
Message-ID:	<20181219151950.GO28727@calimero.vinschen.de>
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On Dec 19 17:43, Andrey Repin wrote:
> Greetings, Corinna Vinschen!
>=20
> > On Dec 19 08:29, Eliot Moss wrote:
> >> On 12/19/2018 7:10 AM, Andrey Repin wrote:
> >> > Greetings, Corinna Vinschen!
> >> >=20
> >> > > Bottom line is, if you want to handle DOS attributes in a special =
way
> >> > > not covered by our POSIX emulation, user space has to do it.
> >> >=20
> >> > Can something be implemented around getfattr to serve this use case =
in a more
> >> > POSIX'y way?
> >>=20
> >> I was not previously much aware of get/setfattr, but I agree that that=
 looks
> >> like a possible way to provide access to the Windows SYS attribute and=
 friends.
> >> Not that I am that familiar with details of what NTFS, etc., provide, =
getfattr
> >> may be a way to provide access to additional attributes / facts about =
files
> >> (paths, generally) as well.  Sounds like it would not be too hard to s=
upport
> >> access to the basic attributes this way.
> >>=20
> >> I suspect the general response will be PTC, though!  :-)
>=20
> > Not only that.  attr is an upstream package, so you would have to=20
> > convince the upstream maintainers to take your patches, ideally.
>=20
> > attr is for handling of extended attributes, quite different from
> > DOS attributes.  I doubt that DOS attribs fit in there.
>=20
> Well, well. We do have a living example of Samba (ab)using xattr to suppo=
rt
> Windows ACL on *NIX.

What are you trying to imply?  That we should fake an user.DOSATTRIB
EA, just like Samba?  Not sure I like the idea since that would have
to be added to each and every file on the fly.  You won't see the
Samba EA from Windows, though.

> I deduce from your response, that a DOS attributes use case would be on
> different side of the table, though.

It's something different.  It's not an EA thingy on Windows but rather
a filesystem property.  So sth. like the vfat IOCTL makes more sense,
if any.


Corinna

--=20
Corinna Vinschen
Cygwin Maintainer

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