Author: cy Date: Fri Oct 16 14:04:16 2015 New Revision: 289421 URL: https://svnweb.freebsd.org/changeset/base/289421
Log: Add default leap-seconds file. This should help ntp networks get the leap second date correct Updates to the file can be obtained from ftp://time.nist.gov/pub/ or ftp://tycho.usno.navy.mil/pub/ntp/. Suggested by: dwmalone Reviewed by: roberto, dwmalone, delphij Approved by: roberto MFC after: 1 week Added: head/etc/ntp/ head/etc/ntp/Makefile (contents, props changed) head/etc/ntp/leap-seconds (contents, props changed) Modified: head/etc/Makefile head/etc/mtree/BSD.var.dist head/etc/ntp.conf Modified: head/etc/Makefile ============================================================================== --- head/etc/Makefile Fri Oct 16 12:53:22 2015 (r289420) +++ head/etc/Makefile Fri Oct 16 14:04:16 2015 (r289421) @@ -240,6 +240,9 @@ distribution: ${_+_}cd ${.CURDIR}/defaults; ${MAKE} install ${_+_}cd ${.CURDIR}/devd; ${MAKE} install ${_+_}cd ${.CURDIR}/gss; ${MAKE} install +.if ${MK_NTP} != "no" + ${_+_}cd ${.CURDIR}/ntp; ${MAKE} install +.endif ${_+_}cd ${.CURDIR}/periodic; ${MAKE} install .if ${MK_PKGBOOTSTRAP} != "no" ${_+_}cd ${.CURDIR}/pkg; ${MAKE} install Modified: head/etc/mtree/BSD.var.dist ============================================================================== --- head/etc/mtree/BSD.var.dist Fri Oct 16 12:53:22 2015 (r289420) +++ head/etc/mtree/BSD.var.dist Fri Oct 16 14:04:16 2015 (r289421) @@ -46,6 +46,8 @@ .. ipf mode=0700 .. + ntp mode=0700 + .. pkg .. ports Modified: head/etc/ntp.conf ============================================================================== --- head/etc/ntp.conf Fri Oct 16 12:53:22 2015 (r289420) +++ head/etc/ntp.conf Fri Oct 16 14:04:16 2015 (r289421) @@ -77,3 +77,8 @@ restrict 127.127.1.0 # #server 127.127.1.0 #fudge 127.127.1.0 stratum 10 + +# See http://support.ntp.org/bin/view/Support/ConfiguringNTP#Section_6.14. +# for documentation regarding leapfile. Updates to the file can be obtained +# from ftp://time.nist.gov/pub/ or ftp://tycho.usno.navy.mil/pub/ntp/. +leapfile "/etc/ntp/leap-seconds" Added: head/etc/ntp/Makefile ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/etc/ntp/Makefile Fri Oct 16 14:04:16 2015 (r289421) @@ -0,0 +1,10 @@ +# $FreeBSD$ + +NO_OBJ= + +FILES= leap-seconds + +FILESDIR= /etc/ntp +FILESMODE= 644 + +.include <bsd.prog.mk> Added: head/etc/ntp/leap-seconds ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/etc/ntp/leap-seconds Fri Oct 16 14:04:16 2015 (r289421) @@ -0,0 +1,119 @@ +# +# $FreeBSD$ +# +# ATOMIC TIME. +# The Coordinated Universal Time (UTC) is the reference time scale derived +# from The "Temps Atomique International" (TAI) calculated by the Bureau +# International des Poids et Mesures (BIPM) using a worldwide network of atomic +# clocks. UTC differs from TAI by an integer number of seconds; it is the basis +# of all activities in the world. +# +# +# ASTRONOMICAL TIME (UT1) is the time scale based on the rate of rotation of the earth. +# It is now mainly derived from Very Long Baseline Interferometry (VLBI). The various +# irregular fluctuations progressively detected in the rotation rate of the Earth lead +# in 1972 to the replacement of UT1 by UTC as the reference time scale. +# +# +# LEAP SECOND +# Atomic clocks are more stable than the rate of the earth rotatiob since the later +# undergoes a full range of geophysical perturbations at various time scales (lunisolar +# and core-mantle torques,atmospheric and oceanic effetcs, ...) +# Leap seconds are needed to keep the two time scales in agreement, i.e. UT1-UTC smaller +# than 0.9 second. So, when necessary a "leap second" is introduced in UTC. +# Since the adoption of this system in 1972 it has been necessary to add 26 seconds to UTC, +# firstly due to the initial choice of the value of the second (1/86400 mean solar day of +# the year 1820) and secondly to the general slowing down of the Earth's rotation. It is +# theorically possible to have a negative leap second (a second removed from UTC), but so far, +# all leap seconds have been positive (a second has been added to UTC). Based on what we know about the earth's rotation, +# it is unlikely that we will ever have a negative leap second. +# +# +# HISTORY +# The first leap second was added on June 30, 1972. Until 2000, it was necessary in average to add a leap second at a rate +# of 1 to 2 years. Since 2000, due to the fact that the earth rate of rotation is accelerating, leap seconds are introduced +# with an average frequency of 3 to 4 years. +# +# +# RESPONSABILITY OF THE DECISION TO INTRODUCE A LEAP SECOND IN UTC +# The decision to introduce a leap second in UTC is the responsibility of the Earth Orientation Center of +# the International Earth Rotation and reference System Service (IERS). This center is located at Paris +# Observatory. According to international agreements, leap second date have to occur at fixed date : +# first preference is given to the end of December and June, and second preference at the end of March +# and September. Since the system was introduced in 1972, only dates in June and December were used. +# +# Questions or comments to: +# Daniel Gambis, daniel.gam...@obspm.fr +# Christian Bizouard: christian.bizou...@obspm.fr +# Earth orientation Center of the IERS +# Paris Observatory, France +# +# +# +# VALIDITY OF THE FILE +# It is important to express the validity of the file. These next two dates are +# given in units of seconds since 1900.0. +# +# 1) Last update of the file. +# +# Updated through IERS Bulletin C (ftp://hpiers.obspm.fr/iers/bul/bulc/bulletinc.dat) +# +# The following line shows the last update of this file in NTP timestamp: +# +#$ 3645216000 +# +# 2) Expiration date of the file given on a semi-annual basis: last June or last December +# +# File expires on 28 December 2015 +# +# Expire date in NTP timestamp: +# +#@ 3660249600 +# +# +# LIST OF LEAP SECONDS +# NTP timestamp (X parameter) is the number of seconds since 1900.0 +# +# MJD: The Modified Julian Day number. MJD = X/86400 + 15020 +# +# DTAI: The difference DTAI= TAI-UTC in units of seconds +# It is the quantity to add to UTC to get the time in TAI +# +# Day Month Year : epoch in clear +# +#NTP Time DTAI Day Month Year +# +2272060800 10 # 1 Jan 1972 +2287785600 11 # 1 Jul 1972 +2303683200 12 # 1 Jan 1973 +2335219200 13 # 1 Jan 1974 +2366755200 14 # 1 Jan 1975 +2398291200 15 # 1 Jan 1976 +2429913600 16 # 1 Jan 1977 +2461449600 17 # 1 Jan 1978 +2492985600 18 # 1 Jan 1979 +2524521600 19 # 1 Jan 1980 +2571782400 20 # 1 Jul 1981 +2603318400 21 # 1 Jul 1982 +2634854400 22 # 1 Jul 1983 +2698012800 23 # 1 Jul 1985 +2776982400 24 # 1 Jan 1988 +2840140800 25 # 1 Jan 1990 +2871676800 26 # 1 Jan 1991 +2918937600 27 # 1 Jul 1992 +2950473600 28 # 1 Jul 1993 +2982009600 29 # 1 Jul 1994 +3029443200 30 # 1 Jan 1996 +3076704000 31 # 1 Jul 1997 +3124137600 32 # 1 Jan 1999 +3345062400 33 # 1 Jan 2006 +3439756800 34 # 1 Jan 2009 +3550089600 35 # 1 Jul 2012 +3644697600 36 # 1 Jul 2015 +# +# In order to verify the integrity of this file, a hash code +# has been generated. For more information how to use +# this hash code, please consult the README file under the +# 'sha' repertory. +# +#h 620ba8af 37900668 95ac09ba d77640f9 6fd75493 _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
