From: Andi Kleen <andi@firstfloor.org>
To: "M Macnair" <mmacnair@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Seeding /dev/random not working
Date: 29 May 2007 18:58:59 +0200 [thread overview]
Message-ID: <p73zm3nefcc.fsf@bingen.suse.de> (raw)
In-Reply-To: <de6d2b4f0705290453kec2b050pb4d0bebc256b87a5@mail.gmail.com>
"M Macnair" <mmacnair@gmail.com> writes:
>
> Many distros ship with an init script that saves and restores the
> entropy pool on startup and shutdown. The bit that interests me that
> is called on startup is (my comments):
> if [ -f $random_seed ]; then
> cat $random_seed >/dev/urandom # should seed the pool
^[OA
Writing doesn't actually work; to get real accounted entropy for /dev/random
you need to use a special ioctl. I ran into this problem some years ago
and ended up writing http://www.muc.de/~ak/rndfeed.c
-Andi
next prev parent reply other threads:[~2007-05-29 16:02 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-29 11:53 Seeding /dev/random not working M Macnair
2007-05-29 13:15 ` Theodore Tso
2007-05-29 13:38 ` M Macnair
2007-05-29 14:14 ` Pavel Machek
2007-05-29 15:17 ` M Macnair
2007-05-29 15:31 ` Jesper Juhl
2007-05-29 16:30 ` Theodore Tso
2007-05-29 20:06 ` Folkert van Heusden
2007-05-29 17:46 ` Matt Mackall
2007-05-29 18:00 ` Matt Mackall
2007-05-29 19:23 ` Eric Dumazet
2007-05-29 19:35 ` Matt Mackall
2007-05-29 16:58 ` Andi Kleen [this message]
2007-05-29 16:44 ` M Macnair
2007-05-29 20:23 ` Matt Mackall
2007-05-29 22:08 ` Andi Kleen
2007-05-29 21:44 ` Matt Mackall
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