Re: Direct access to hardware

From: Horst von Brand (vonbrand@inf.utfsm.cl)
Date: Mon Jul 24 2000 - 12:53:49 EST


Andre Hedrick <andre@linux-ide.org> said:

[...]

> Willfully and now knowingly issuing commands that are otherwise not listed
> will be defined in ATA-ATAPI Specification can be deemed as violation of
> the Standard. Regardless if there are vendor-unique commands present or
> not, this would defined as accessing commands that are not considered the
> standard and deemed a violation.

If Linux (the kernel) does so, it is certainly a bug which must be fixed
ASAP. If a userland program provided by Western Digital, Seagate, IBM or
whatnot does so, it isn't Linux's fault.

If you go by your interpretation, _no_ OS can ever be able to comply, as
they just can't ever prevent somebody writing a proggie that (given access)
bangs whatever garbage it wants at whatever piece of hardware it wants to.

-- 
Dr. Horst H. von Brand                       mailto:vonbrand@inf.utfsm.cl
Departamento de Informatica                     Fono: +56 32 654431
Universidad Tecnica Federico Santa Maria              +56 32 654239
Casilla 110-V, Valparaiso, Chile                Fax:  +56 32 797513

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