From: "François Revol" <revol@free.fr>
To: shawn wilson <ag4ve.us@gmail.com>
Cc: Zsh Users <zsh-users@zsh.org>
Subject: Re: note metadata for files
Date: Mon, 07 Jul 2014 11:25:25 +0200 [thread overview]
Message-ID: <53BA6785.2030208@free.fr> (raw)
In-Reply-To: <CAH_OBidWyhfqoE5XgarkMTc_TwWhuHHrbNsPZyU87cG2Q5Tr0w@mail.gmail.com>
On 07/07/2014 00:32, shawn wilson wrote:
> So, I'm pushing this more into the realm of OT here (ie, this no
> longer has anything to do with zsh and for this reason and possibly
> others, this discussion might want to go offlist)
[...]
>> In case you're interested in the xattr compatibility issue, I've written
>> a paper about this:
>> http://dcevents.dublincore.org/IntConf/dc-2011/paper/view/53
>> Sadly it seems nobody cares.
>
> Hmmmm, so how far has your research gone here? What software ignores
> xattr on which fs (how well does something like ncase deal with it)?
Well, even things like /bin/cp -p (--preserve) by default only preserves
mode,owner‐ship,timestamps but not xattr...
I think rsync supports the linux xattrs, probably not enabled by default
again, but I didn't try yet.
Don't know about ncase.
> What security mechanisms rely on EAs and have you tried to mangle them
> in order to bypass these mechanisms (either OS or application
> policies)?
I didn't really consider this question, given Samba alone already has a
hard time enough converting the ACLs.
Note, xattrs on Linux (and the now-withdrawn POSIX draft about xattrs)
have only been done on purpose of implementing ACLs atop.
> I'd be more interested in the networked ramifications of
> mangled EAs, but a copy from a thumb drive might be interesting as
> well (though I doubt that would be very fruitful since moving into a
> higher security realm is a bit harder in kernel space).
Besides, things like Samba and NTFS-3g differ (at least used to) on the
way the mangle named-stream inside xattrs...
François.
next prev parent reply other threads:[~2014-07-07 9:36 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-02 17:59 shawn wilson
2014-07-03 7:27 ` Roman Neuhauser
2014-07-03 21:44 ` Peter Stephenson
2014-07-04 3:55 ` shawn wilson
2014-07-04 10:50 ` François Revol
2014-07-06 22:32 ` shawn wilson
2014-07-07 9:25 ` François Revol [this message]
2014-07-03 21:52 ` Mikael Magnusson
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