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From: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
To: "DevilKin" <devilkin@gmx.net>
Cc: "lkml" <linux-kernel@vger.kernel.org>
In-Reply-To: <20011213155532Z284289-18284+114@vger.kernel.org>
Subject: Re: User/kernelspace stuff to set/get kernel variables
Date: Thu, 13 Dec 2001 17:11:12 +0100
Organization: ENIB - Anciens
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Hi DK.

> Basically: is it possible to - one way or another - set variables at
> kernel boot and read those using userspace utilities?
> for instance: i boot my kernel (using any old bootmanager that
> accepts kernel params)
> LILO: linux network=dhcp
> and later, in the init scripts, i check the value of this variable
> using some sort of userspace program, and if it happends to be
> 'dhcp' i'll invoke the dhcp client.
[--8<--SNIP--8<--]

You'll at least find that in /proc/1/environ

It's a null-terminated list of strings that consist of what you want.
You'll see it as well while dumping the kernel log (dmesg) at the
begining. For my machine, I have:

--8<--
Kernel command line: auto BOOT_IMAGE=linux root=806 devfs=mount idebus=33
--8<--

Regards,
Yann.

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