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-<?xml version="1.0" encoding="iso-8859-1"?>
-<!DOCTYPE html PUBLIC "-//FreeBSD//DTD XHTML 1.0 Transitional-Based Extension//EN"
-"http://www.FreeBSD.org/XML/doc/share/sgml/xhtml10-freebsd.dtd" [
-<!ENTITY title 'Year 2000 Compatibility (aka "Millennium Bug")'>
-]>
-
-<html xmlns="http://www.w3.org/1999/xhtml">
- <head>
- <title>&title;</title>
-
- <cvs:keyword xmlns:cvs="http://www.FreeBSD.org/XML/CVS">$FreeBSD$</cvs:keyword>
- </head>
-
- <body class="navinclude.docs">
-
- <p>As management understanding of the Year 2000 problem (aka, "The
- Millennium Bug") increases, more and more companies are demanding
- official statements from the vendors of their hardware and software as
- to how their product will handle the year 2000 date rollover.</p>
-
- <p>Organizations that use &unix; and Unix-like operating systems such as
- FreeBSD are already one step ahead of the problem. FreeBSD will
- properly maintain time long after year 2000 passes.</p>
-
- <h2>Background information</h2>
-
- <p><i>(This section based on the text from the <a
- href="http://www.linux.org.uk/mbug.html">Linux Y2K compliance
- page</a>)</i></p>
-
- <p>As with all Unix and Unix-like operating systems, time and dates in
- FreeBSD are represented internally as the number of seconds since the
- 1st of January 1970 (the Unix "epoch"). Currently, that figure is
- stored as a 32 bit integer, and will run out part way through 2038. By
- then we should (hopefully) be using a counter of 64 bits (or greater)
- which should be good until the end of the universe.</p>
-
- <p>Note that the OS being Y2K compliant will not fix errant applications
- that are not Y2K compliant.</p>
-
- <p>Note also that the OS expects to read the current date and time from
- the CMOS clock of your computer. Not all of these devices correctly
- handle the year 2000. You are advised to test each platform
- individually to ensure that your hardware clock behaves correctly when
- going from 1999 to 2000, and that it correctly interprets the year 2000
- as a leap year.</p>
-
- <h2>What you can do</h2>
-
- <p>FreeBSD will continue to properly maintain time well into the next
- century. Third party applications, however, might not. Your best
- defense against year 2000 issues is a good offense. Listening to
- stories claiming the coming meltdown of the world as we know it are
- <strong>not</strong> the way to solve the millennium bug. Nor is
- waiting until the last minute. The FreeBSD Project recommends that your
- organization apply sound system administration principles as the
- millennium approaches.</p>
-
- <h2>FreeBSD Year 2000 Statement</h2>
-
- <blockquote>
- <p>"After extensive analysis and testing, we believe that FreeBSD is
- 100% Y2K compliant. In the unlikely event that something has been
- overlooked, we will do our best to fix it as soon as possible."</p>
-
- <p align="right">David Greenman<br/>Principal Architect, The FreeBSD
- project</p>
- </blockquote>
-
- <h2>Fixed problems</h2>
-
- <p>The following Y2K problems have been identified and fixed in
- FreeBSD.</p>
-
- <dl>
- <dt><a
- href="http://www.FreeBSD.org/cgi/query-pr.cgi?pr=1380">misc/1380</a></dt>
-
- <dd>Several programs have a hardcoded 19%d in responses for the year.
- Affected programs include: yacc, ftpd, and make. [Fixed: yacc v1.2
- 1999/01/18; ftpd v1.7 1996/08/05; make v1.4 1996/10/06; fixes in
- FreeBSD-2.2 and above]</dd>
-
- <dt><a
- href="http://www.FreeBSD.org/cgi/query-pr.cgi?pr=1382">conf/1382</a></dt>
-
- <dd>The sed script in /etc/rc.local that builds the host/kernel ID line
- for the message of the day relies on the year not going past 1999.
- [Fixed v1.21 1996/10/24; fixes in FreeBSD-2.2 and above]</dd>
-
- <dt><a
- href="http://www.FreeBSD.org/cgi/query-pr.cgi?pr=3465">misc/3465</a></dt>
-
- <dd>The etc/namedb/make-localhost command generates the DNS serial
- number as YYMMDD. In the year 2000, this will be generated as
- 1YYMMDD. [Fixed v1.2 1997/08/11; fixes in FreeBSD-2.2.5 and
- above]</dd>
-
- <dt><a
- href="http://www.FreeBSD.org/cgi/query-pr.cgi?pr=4930">gnu/4930</a> and
- <a
- href="http://www.FreeBSD.org/cgi/query-pr.cgi?pr=8321">gnu/8321</a></dt>
-
- <dd>groff tmac macros have hardcoded 19 for generating some dates.
- [Fixed: tmac.e v1.3 1998/12/06; doc-common v1.10 1999/01/19; fixes in
- FreeBSD-3.1 and above]</dd>
-
-
- <dt><a
- href="http://www.FreeBSD.org/cgi/query-pr.cgi?pr=9323">bin/9323</a></dt>
-
- <dd>In its obsolescent form, touch doesn't treat the two digit year
- specification correctly. Years in the range 00-68 are treated
- as 1900-1968 instead of 2000-2068. [Fixed v1.7 1999/01/05; fixes in
- FreeBSD-3.1 and above]</dd>
-
- <dt><a
- href="http://cvsweb.FreeBSD.org/src/usr.sbin/xntpd/parse/util/dcfd.c">xntpd/parse/util/dcfd.c</a></dt>
-
- <dd>The leap year calculations for the number of days in a year, and the
- conversion of DCF77 time to seconds since the Epoch were wrong. These
- errors affected all years. [Fixed v1.6 1999/01/12; fixes in
- FreeBSD-3.1 and above]</dd>
-
- <dt><a
- href="http://cvsweb.FreeBSD.org/src/gnu/usr.bin/tar/getdate.y">tar/getdate.y</a></dt>
-
- <dd>Function Convert() was hard-coded for two digit years in range 70-99.
- Now adjusted to allow two digit years for 1970-2069. The function
- does not allow for century non-leap years - y2k1 alert! [Fixed v1.4
- 1999/01/12; fixes in FreeBSD-3.1 and above]
- </dd>
-
- <dt><a
- href="http://cvsweb.FreeBSD.org/src/usr.bin/fetch/http.c">fetch/http.c</a></dt>
-
- <dd>The HTTP protocol includes an obsolete date format which uses a
- two-digit year. Previous versions of fetch would interpret all such
- dates in the 1900s; subsequent to this revision, the pivot described
- in <a href="ftp://ftp.cdrom.com/pub/internet/rfc/rfc2068.txt">RFC
- 2068</a> is employed, which causes two-digit years to be interpreted
- as always belonging to the current century unless they would be 50 or
- more years in the future. Since the HTTP servers which use this
- obsolete format are no longer widespread, this is not expected to have
- a significant impact. [Fixed v1.24 1999/01/15; fixes in FreeBSD-3.1
- and above]</dd>
-
- <dt><a
- href="http://www.FreeBSD.org/cgi/query-pr.cgi?pr=9500">misc/9500</a></dt>
-
- <dd>The `edithook' script in the CVSROOT directory uses a raw tm_year
- and will therefore display 01/01/100 for 2000-JAN-01. [Fixed v1.2
- 1999/01/17; not relevant to FreeBSD releases]</dd>
-
- <dt><a
- href="http://www.FreeBSD.org/cgi/query-pr.cgi?pr=9501">bin/9501</a></dt>
-
- <dd>Several cvs contrib files are not Y2K compliant. The log.pl and
- sccs2rcs.csh scripts prepend `19' to the year resulting in a display
- of 19100 for 2000. The log_accum.pl script uses a two digit year in
- one place and in another place assumes that the tm_year is year within
- century rather than years since 1900. [Fixed: log.pl v1.2 1999/01/15;
- sccs2rcs.csh v1.3 1999/01/15; fixes in FreeBSD-3.1 and above]</dd>
-
- <dt><a
- href="http://www.FreeBSD.org/cgi/query-pr.cgi?pr=9502">bin/9502</a></dt>
- <dd>The groff number register `yr' is assigned from a (struct
- tm).tm_year and therefore represents the number of years since 1900,
- not the year within the century (see definition in troff/input.cc).
- [Fixed, now set mod 100, troff/input.cc V1.2 1999/06/03; fixed
- in FreeBSD-3.3]</dd>
-
- <dt><a
- href="http://www.FreeBSD.org/cgi/query-pr.cgi?pr=9503">bin/9503</a></dt>
-
- <dd>PicoBSD's simple_httpd uses a raw tm_year and will therefore display
- 01/01/100 for 2000-JAN-01. [Fixed v1.2 1999/01/16; fixes in
- FreeBSD-3.1 and above]</dd>
-
- <dt><a
- href="http://www.FreeBSD.org/cgi/query-pr.cgi?pr=9505">bin/9505</a></dt>
-
- <dd>Adduser uses a raw tm_year and will therefore display 100/01/01 for
- 2000-JAN-01. [Fixed v1.42 1999/01/15; fixes in FreeBSD-3.1 and
- above]</dd>
-
- <dt><a
- href="http://www.FreeBSD.org/cgi/query-pr.cgi?pr=9506">bin/9506</a></dt>
-
- <dd>Cron uses a raw tm_year and will therefore display 100 for 2000.
- [Fixed v1.7 1999/01/16; fixes in FreeBSD-3.1 and above]</dd>
-
- <dt><a
- href="http://www.FreeBSD.org/cgi/query-pr.cgi?pr=9507">bin/9507</a></dt>
-
- <dd>tcpslice(8) uses a raw tm_year and will therefore display
- 100y01m01d... for 2000-JAN-01. For compatibility, use a two-digit
- year until 2000.[Fixed v1.8 1999/01/20; fixes in FreeBSD-3.1 and
- above]</dd>
-
- <dt><a
- href="http://www.FreeBSD.org/cgi/query-pr.cgi?pr=14472">bin/14472</a></dt>
-
- <dd>Date command does not take thousand/hundred digits. [Fixed v1.31 1999/11/10]
- </dd>
-
- <dt><a
- href="http://www.FreeBSD.org/cgi/query-pr.cgi?pr=14511">misc/14511</a></dt>
-
- <dd>Chpass has a problem using 00 for expiration year.
- </dd>
-
- <dt><a
- href="http://www.FreeBSD.org/cgi/query-pr.cgi?pr=15852">bin/15852</a> and
- <a
- href="http://www.FreeBSD.org/cgi/query-pr.cgi?pr=16045">gnu/16045</a> and
- <a
- href="http://www.FreeBSD.org/cgi/query-pr.cgi?pr=16207">bin/16207</a>
- </dt>
-
- <dd>Groff predefined \*(DT [\*(td] string has Y2K bug. [Fixed with import of
- version 1.15 2000/01/12]
- </dd>
-
- <dt><a
- href="http://www.FreeBSD.org/cgi/query-pr.cgi?pr=15872">bin/15872</a></dt>
-
- <dd>at(1) has a problem with valid time specifications if tm_year is 100,
- reports `garbled time'.
- </dd>
-
- <dt><a
- href="http://www.FreeBSD.org/cgi/query-pr.cgi?pr=16238">misc/16238</a></dt>
-
- <dd>KerberosIV install does not work properly because there is a hard-wired
- expiration date of 12/31/99 in the Kerberos source for the ticket
- granter. [Fixed v1.24 1999/09/19]
- </dd>
- </dl>
-
- <h2>More information</h2>
-
- <p>If you have further questions about FreeBSD's year 2000 compliance, or
- you have discovered an application running under FreeBSD that is not Y2K
- compliant, please contact the project at <a
- href="mailto:freebsd-bugs@FreeBSD.org">freebsd-bugs@FreeBSD.org</a>.</p>
-
- </body>
-</html>