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Date: Sun, 27 Mar 2011 21:38:29 -0400
From: Ed Maste <emaste@freebsd.org>
To: David Wolfskill <david@catwhisker.org>
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Cc: hackers@FreeBSD.org, Doug Barton <dougb@FreeBSD.org>, edwin@freebsd.org
Subject: Re: Keeping /etc/localtime up-to-date
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On Sun, Mar 27, 2011 at 03:27:32PM -0700, David Wolfskill wrote:

> There are other ways to do it, of course -- e.g., the first time the
> utility is run, it could actually ask, but then cache the information in
> some place so it could look there first (and if it finds a cached
> answer, avoid asking again unless it's told to ignore the cache -- as
> might be reasonable if the machine is moved to a different time zone.

That's what tzsetup does in HEAD - the name of the selected timezone file
is stored in /var/db/zoneinfo, and tzsetup -r can be used to copy in an
updated file:

  -r  Reinstall the zoneinfo file installed last time. The
      name is obtained from /var/db/zoneinfo.

It looks like this hasn't been MFC'd, although I'm not sure why.  The
change came in from svn rev 198267 by edwin (CC'd).

-Ed