Date: Thu, 31 Aug 2006 19:38:58 +0400 From: Ruslan Ermilov <ru@FreeBSD.org> To: backyard <backyard1454-bsd@yahoo.com> Cc: freebsd-questions@FreeBSD.org Subject: Re: who do you install freebsd without sysinstall? Message-ID: <20060831153858.GH56996@rambler-co.ru> In-Reply-To: <20060831152445.21661.qmail@web83105.mail.mud.yahoo.com> References: <20060831151823.GE56996@rambler-co.ru> <20060831152445.21661.qmail@web83105.mail.mud.yahoo.com>
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On Thu, Aug 31, 2006 at 08:24:45AM -0700, backyard wrote:
> how does cron save entropy??? I've noticed "saving
> entropy files" at shutdown but have always wondered
> what it is using. or does it just read from
> /dev/random?
>=20
# Save some entropy so that /dev/random can re-seed on boot.
*/11 * * * * operator /usr/libexec/save-entropy
The latter saves some amount of /dev/random for further
seeding. /entropy is saved by /etc/rc.d/random, when
it stops.
random_stop()
{
# Write some entropy so when the machine reboots /dev/random
# can be reseeded
#
I think two mechanisms exist because a solution involving
cron(8) works better, but cron(8) is not guaranteed to be
up and running (untypical but anyway), so additionally an
entropy is also saved once on shutdown.
Cheers,
--=20
Ruslan Ermilov
ru@FreeBSD.org
FreeBSD committer
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