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Date:      Tue, 24 Oct 2000 09:18:31 -0500
From:      Mike Pritchard <mpp@mppsystems.com>
To:        Warner Losh <imp@village.org>
Cc:        Mark Murray <mark@grondar.za>, "John W. De Boskey" <jwd@FreeBSD.org>, "Jordan K. Hubbard" <jkh@FreeBSD.org>, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject:   Re: cvs commit: src/etc rc
Message-ID:  <20001024091831.A49235@mppsystems.com>
In-Reply-To: <200010232321.RAA11268@harmony.village.org>; from imp@village.org on Mon, Oct 23, 2000 at 05:21:49PM -0600
References:  <200010232046.e9NKkLR01463@grimreaper.grondar.za> <20001023081548.A41843@bsdwins.com> <200010232046.e9NKkLR01463@grimreaper.grondar.za> <200010232321.RAA11268@harmony.village.org>

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On Mon, Oct 23, 2000 at 05:21:49PM -0600, Warner Losh wrote:
> Personally, I'm thinking seriously of changing that whole guessing
> mess to something like
> 	n=`date %S`
> 	dd if=/dev/da0s1b of=/dev/random seek=$n bs=16k count=1 \
> 		>/dev/null  2>&1
> as the first few lines of /etc/rc before even fsck.  As it doesn't
> require access to file systems.
> 
> This does assume three things:
> 	1) That swap space is random enough (and on da0s1b :)
> 	2) 16k is enough
> 	3) swap space is at least 1M in size.
> but it is good enough for the fallback case.

I have a couple of machines that rarely, if ever, swap.  So my swap
partitions are pretty much static data, which seems to make them
a poor source of entropy.

-Mike
-- 
Mike Pritchard
mpp@FreeBSD.org or mpp@mppsystems.com


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