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Re: PROM variables

To: Vincent Stehlé <>
Subject: Re: PROM variables
From: Guido Guenther <>
Date: Thu, 13 Mar 2003 11:26:01 +0100
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Mail-followup-to: Guido Guenther <>, Vincent Stehlé <>,
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Hi Vincent,
On Thu, Mar 13, 2003 at 11:04:22AM +0100, Vincent Stehlé wrote:
> Is there a way to get/set PROM variables under Linux ?
Not for IP22.

> I have an indigo2 with no display, and setting the variables without 
> reverting to the monitor through the serial line would be very handy.
If you pull out the graphics board the machine will switch to the serial

> As I doubt there is currently a solution, I was thinking about 
> implementing this as a /proc subdir. What do you think ?
What about multiple files in /proc/arcs which have the PROM variables as
name and its value as contents? When doing this I'd write into the NVRAM
directly instead of using the Arcs functions, I think the necessary info
is in the IRIX headers.
 -- Guido

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