linux-kernel - Re: [RFC/PATCH] revoke/frevoke system calls V2

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Date:	Wed, 09 Aug 2006 11:42:07 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Edgar Toernig <froese@....de>
Cc:	Pekka Enberg <penberg@...helsinki.fi>, Pavel Machek <pavel@....cz>,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	akpm@...l.org, viro@...iv.linux.org.uk, tytso@....edu,
	tigran@...itas.com
Subject: Re: [RFC/PATCH] revoke/frevoke system calls V2

Ar Mer, 2006-08-09 am 10:41 +0200, ysgrifennodd Edgar Toernig:
> > If I own the file I can make it a symlink to a pty/tty pair
> > I can revoke a pty/tty pair
> 
> With the EIO/EOF behaviour that's not a problem - apps that deal
> with ttys have to expect that condition.

Think about it a moment - I can symlink any file to a tty/pty pair so
any file I own you open might be a tty.

> Hmm... which apps have an open fd on block devices?  Usually a

cdrecord, cd audio players, eject, ....


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