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From: Pavel Fedin <p.fedin@samsung.com>
To: cygwin@cygwin.com
References: <006e01cf1066$c5f0e080$51d2a180$%fedin@samsung.com> <20140113141041.GC21977@calimero.vinschen.de> <002f01cf11ba$df28b550$9d7a1ff0$%fedin@samsung.com> <20140115091530.GH10212@calimero.vinschen.de>
In-reply-to: <20140115091530.GH10212@calimero.vinschen.de>
Subject: RE: Extended attributes
Date: Thu, 16 Jan 2014 10:08:27 +0400
Message-id: <001701cf1281$5fc57150$1f5053f0$%fedin@samsung.com>
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 Hello!

> >  What do you think about adding other possible namespaces (system,
> > security, and... don't remember the 3rd one) ? So that when
> > manipulating UNIX archives etc these attributes could be kept along
> > with files ? At least we have one use case now.
> 
> That doesn't make sense.  Extended attributes as implemented by Windows
> are user attributes, not system attributes.  The non-user attributes on
> Linux have a very special meaning to the kernel and/or are restricted
> to privileged users only.  Their functionality is already provided by
> other OS functions (as for system.posix_acl_access) or not at all (as
> for security.selinux).

 I know they have special meaning. At the other hand, if we allow them, we will allow to store them on a filesystem. Wouldn't it be nice ? This is useful at least for SquashFS image preparation.
 I guess for similar reasons we have support e. g. for device nodes (/dev) with their major/minor numbers. They are also ignored by Cygwin, and just stored on the filesystem (or do i miss something ?).

Kind regards,
Pavel Fedin
Expert Engineer
Samsung Electronics Research center Russia


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