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From: merlyn@stonehenge.com (Randal L. Schwartz)
To: Jos Chrispijn <kernel@webrz.net>
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Date: Sun, 11 Apr 2010 10:32:06 -0700
In-Reply-To: <4BC1972B.1080603@webrz.net> (Jos Chrispijn's message of "Sun, 11
	Apr 2010 11:32:27 +0200")
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Cc: freebsd-questions@freebsd.org
Subject: Re: Auto update
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>>>>> "Jos" == Jos Chrispijn <kernel@webrz.net> writes:

Jos> In order to find out if someone logged in, I should then first copy auth.log
Jos> to auth2.log, and do a compare and then do the tail trick. Have to cron that
Jos> every half a minute.

No, just track it with tail -f as was already suggested.

tail -f /var/log/authlog | while read aline; do; ... ; done

The code in the middle will get executed as each line appears in the
file.  This even survives authlog renaming when you logroll.

-- 
Randal L. Schwartz - Stonehenge Consulting Services, Inc. - +1 503 777 0095
<merlyn@stonehenge.com> <URL:http://www.stonehenge.com/merlyn/>
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