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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: copy-directory
Date: Sun, 04 Oct 2009 23:31:20 +0200
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> From: Michael Albinus <michael.albinus@gmx.de>
> Cc: emacs-devel@gnu.org
> Date: Sun, 04 Oct 2009 21:58:51 +0200
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > Please don't rely on the `chown' command being available for the
> > preserve-uid-gid option.  It is only available on Posix platforms.
> > Instead, please add a primitive to do this from within Emacs.
> 
> I know that. But I do not know how important it is on W32.

NTFS, the native filesystem of Windows 2K/XP/Vista supports file
ownership, so it's at least as important as on Posix.