From: Jamie Lokier <lk@tantalophile.demon.co.uk>
To: Daniel Phillips <phillips@innominate.de>
Cc: Jesse Pollard <pollard@tomcat.admin.navo.hpc.mil>,
linux-kernel@vger.kernel.org
Subject: Re: FS callback routines
Date: Wed, 10 Jan 2001 11:48:25 +0100 [thread overview]
Message-ID: <20010110114825.D30055@pcep-jamie.cern.ch> (raw)
In-Reply-To: <200101091405.IAA24807@tomcat.admin.navo.hpc.mil> <3A5B3114.FAC64E04@innominate.de>
In-Reply-To: <3A5B3114.FAC64E04@innominate.de>; from phillips@innominate.de on Tue, Jan 09, 2001 at 04:41:08PM +0100
Daniel Phillips wrote:
> > It would also be very nice if the security of the feature could be
> > confirmed. The problem with SGI's implementation is that it becomes
> > possible to monitor files that you don't own, don't have access to,
> > or are not permitted to know even exist.
>
> To receive notification about events in a given directory you have to be
> able to open it. Is this adequate for your needs?
No, because to open a directory you only nead read permission, whereas
to read attributes of files in the directory, you need execute
permission on the directory.
Also, you are getting notifications for unlinked files, which perhaps
you should not be able to know anything about. (If the directory wasn't
accessible when the file was unlinked for example, but was made
accessible later).
-- Jamie
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next prev parent reply other threads:[~2001-01-10 10:49 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-09 14:05 Jesse Pollard
2001-01-09 15:41 ` Daniel Phillips
2001-01-10 10:48 ` Jamie Lokier [this message]
-- strict thread matches above, loose matches on Subject: below --
2001-01-11 16:39 Jesse Pollard
2001-01-11 17:53 ` Daniel Phillips
2001-01-10 15:18 Jesse Pollard
2001-01-09 1:21 Sean R. Bright
2001-01-09 11:22 ` Philipp Matthias Hahn
2001-01-09 11:34 ` Daniel Stodden
2001-01-08 23:12 Michael D. Crawford
2001-01-09 2:37 ` Sean R. Bright
2001-01-09 3:48 ` David Weinehall
2001-01-09 13:07 ` Daniel Phillips
2001-01-10 10:56 ` Jamie Lokier
2001-01-10 18:25 ` Daniel Phillips
2001-01-11 14:30 ` Daniel Phillips
2001-01-11 15:37 ` Jamie Lokier
2001-01-11 16:11 ` Daniel Phillips
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