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Date: Wed, 22 May 2002 13:12:10 +0400
From: Nick Kurshev <nickols_k@mail.ru>
To: linux-kernel@vger.kernel.org
Subject: Re: /dev/port BUG and possible workaround
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Hello, Martin!

On Wed, 22 May 2002 09:52:35 +0200 you wrote:

> Uz.ytkownik Nick Kurshev napisa?:
> 
> ...
> 
> > 800=inl(CFC)
> > 2. Wrong log with using of /dev/port:
> 
> ...
> 
> > But it seems that nobody uses this device. Then what is goal
> > of implementing of this device?
> 
> Basically the goal is that contrary to some silly /proc
> stuff which is "en vouge" nowadays you have the ability to
> controll port access by using normal user permission control
> semantics of unix file access permissions, by giving /dev/port
> a proper group and so on. This is legacy crap of course, since
But this device is unworking in general. It simply unusable for
programs which require 4-byte operations with ports.
As I wrote: outl() != 4*outb() same as inl() != 4*inb()
> the above goal can be reached by using a apache-suexec alike wrapper
> as well... even with more fine grained resolution of access controll.
> 
Maybe after fixing these flaws it will be usable but not for now.


Best regards! Nick

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