From owner-freebsd-audit  Thu Oct  4 15:43:54 2001
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To: cjclark@alum.mit.edu
Cc: freebsd-audit@FreeBSD.ORG
Subject: Re: dmesg.boot Gets Overwritten without Reboot
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	<20011004152541.I297@blossom.cjclark.org>
From: Dag-Erling Smorgrav <des@ofug.org>
Date: 05 Oct 2001 00:43:47 +0200
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"Crist J. Clark" <cristjc@earthlink.net> writes:
> On Thu, Oct 04, 2001 at 02:00:23PM +0200, Dag-Erling Smorgrav wrote:
> > Is there any way you can compare the timestamp on /var/run/dmesg.boot
> > with `sysctl -n kern.boottime`?  This would DTRT in almost all cases
> > (the exception being the case where you set the clock back before
> > returning from single-user mode)
> Right, but is there a more graceful way than [...]

Recent FreeBSD versions of find(1) have a -newerXY operator that will
DTRT if X=m and Y=t:

$ find /var/run -type f -name dmesg.boot -newermt "$(sysctl -n kern.boottime | sed 's/.*}//')"
/var/run/dmesg.boot

If find(1) outputs "/var/run/dmesg.boot", do nothing - otherwise,
create the file.

DES
-- 
Dag-Erling Smorgrav - des@ofug.org

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