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Date: Wed, 1 Jul 2015 14:01:48 -0700
From: John-Mark Gurney <jmg@funkthat.com>
To: Peter Jeremy <peter@rulingia.com>
Cc: Leif Pedersen <bilbo@hobbiton.org>,
 "freebsd-security@freebsd.org" <freebsd-security@freebsd.org>
Subject: Re: Leap Second
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Peter Jeremy wrote this message on Thu, Jul 02, 2015 at 06:27 +1000:
> On 2015-Jul-01 12:46:21 -0500, Leif Pedersen <bilbo@hobbiton.org> wrote:
> >Is there a reasonable way to enable awareness of leap-seconds while syncing
> >with ntpd? That is to say, how can I get the system to include leap-seconds
> >in calculating `date +%s`, without having `date` be off by 26[1] seconds?
> 
> ntpd(8) has provision for specifying a leapsecond file which presumably
> makes it leap-second aware.  I haven't looked into the details.
> 
> There's also posix2time(3) to convert between a TAI-based time_t and a
> POSIX-based time_t.

Though from my reading of the code, you need to have TZ files compiled
w/ leap seconds which FreeBSD doesn't do by default...

-- 
  John-Mark Gurney				Voice: +1 415 225 5579

     "All that I will do, has been done, All that I have, has not."