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Date:      Fri, 08 Mar 2002 02:08:54 -0800
From:      Terry Lambert <tlambert2@mindspring.com>
To:        Luigi Rizzo <rizzo@icir.org>
Cc:        arch@FreeBSD.ORG
Subject:   Re: Proposed patch: kern.bootdev* sysctl variables
Message-ID:  <3C888DB6.8DF80EE7@mindspring.com>
References:  <20020308020009.A6535@iguana.icir.org>

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Luigi Rizzo wrote:
> Any objection to the following patch to i386/i386/autoconf.c
> to let userland apps know [an approximation of] the name
> of the device the kernel was booted from ?
> 
> The main use would be for startup scripts, such as
> /etc/rc, which could this way differentiate their
> behaviour based on the returned result.
> 
> (I know it can be perfected by not assuming that
> any hard disk is /dev/ad, but you get the idea...)

If you grabbed the actual boot information from the
tunables in the loader environment (using TUNABLE
macros), you could get the actual thing.

To see what's available, do a "set" at the loader prompt.

-- Terry

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