13 files changed, 5057 insertions, 0 deletions

diff --git a/contrib/tzcode/zic/Makefile b/contrib/tzcode/zic/Makefile
new file mode 100644
index 000000000000..2496e821159b
--- /dev/null
+++ b/contrib/tzcode/zic/Makefile
@@ -0,0 +1,8 @@
+# $FreeBSD$
+
+# Vendor contact: tz@elsie.nci.nih.gov
+MAINTAINER=	wollman@FreeBSD.org
+
+SUBDIR=	zic zdump
+
+.include <bsd.subdir.mk>
diff --git a/contrib/tzcode/zic/Makefile.inc b/contrib/tzcode/zic/Makefile.inc
new file mode 100644
index 000000000000..b915adff92ab
--- /dev/null
+++ b/contrib/tzcode/zic/Makefile.inc
@@ -0,0 +1,3 @@
+# $FreeBSD$
+
+.include "${.CURDIR}/../../Makefile.inc"
diff --git a/contrib/tzcode/zic/README b/contrib/tzcode/zic/README
new file mode 100644
index 000000000000..5cb701eca276
--- /dev/null
+++ b/contrib/tzcode/zic/README
@@ -0,0 +1,88 @@
+@(#)README	8.3
+This file is in the public domain, so clarified as of
+2009-05-17 by Arthur David Olson.
+
+$FreeBSD$
+
+"What time is it?" -- Richard Deacon as The King
+"Any time you want it to be." -- Frank Baxter as The Scientist
+					(from the Bell System film "About Time")
+
+The 1989 update of the time zone package featured
+
+*	POSIXization (including interpretation of POSIX-style TZ environment
+	variables, provided by Guy Harris),
+*	ANSIfication (including versions of "mktime" and "difftime"),
+*	SVIDulation (an "altzone" variable)
+*	MACHination (the "gtime" function)
+*	corrections to some time zone data (including corrections to the rules
+	for Great Britain and New Zealand)
+*	reference data from the United States Naval Observatory for folks who
+	want to do additional time zones
+*	and the 1989 data for Saudi Arabia.
+
+(Since this code will be treated as "part of the implementation" in some places
+and as "part of the application" in others, there's no good way to name
+functions, such as timegm, that are not part of the proposed ANSI C standard;
+such functions have kept their old, underscore-free names in this update.)
+
+And the "dysize" function has disappeared; it was present to allow compilation
+of the "date" command on old BSD systems, and a version of "date" is now
+provided in the package.  The "date" command is not created when you "make all"
+since it may lack options provided by the version distributed with your
+operating system, or may not interact with the system in the same way the
+native version does.
+
+Since POSIX frowns on correct leap second handling, the default behavior of
+the "zic" command (in the absence of a "-L" option) has been changed to omit
+leap second information from its output files.
+
+Here is a recipe for acquiring, building, installing, and testing the
+tz distribution on a GNU/Linux or similar host.
+
+	mkdir tz
+	cd tz
+	wget 'ftp://elsie.nci.nih.gov/pub/tz*.tar.gz'
+	gzip -dc tzcode*.tar.gz | tar -xf -
+	gzip -dc tzdata*.tar.gz | tar -xf -
+
+Be sure to read the comments in "Makefile" and make any changes needed
+to make things right for your system, especially if you are using some
+platform other than GNU/Linux.  Then run the following commands,
+substituting your desired installation directory for "$HOME/tzdir":
+
+	make TOPDIR=$HOME/tzdir install
+	$HOME/tzdir/etc/zdump -v America/Los_Angeles
+
+To use the new functions, use a "-ltz" option when compiling or linking.
+
+Historical local time information has been included here to:
+
+*	provide a compendium of data about the history of civil time
+	that is useful even if the data are not 100% accurate;
+
+*	give an idea of the variety of local time rules that have
+	existed in the past and thus an idea of the variety that may be
+	expected in the future;
+
+*	provide a test of the generality of the local time rule description
+	system.
+
+The information in the time zone data files is by no means authoritative;
+the files currently do not even attempt to cover all time stamps before
+1970, and there are undoubtedly errors even for time stamps since 1970.
+If you know that the rules are different from those in a file, by all means
+feel free to change file (and please send the changed version to
+tz@elsie.nci.nih.gov for use in the future).  Europeans take note!
+
+Thanks to these Timezone Caballeros who've made major contributions to the
+time conversion package:  Keith Bostic; Bob Devine; Paul Eggert; Robert Elz;
+Guy Harris; Mark Horton; John Mackin; and Bradley White.  Thanks also to
+Michael Bloom, Art Neilson, Stephen Prince, John Sovereign, and Frank Wales
+for testing work, and to Gwillim Law for checking local mean time data.
+None of them are responsible for remaining errors.
+
+Look in the ~ftp/pub directory of elsie.nci.nih.gov
+for updated versions of these files.
+
+Please send comments or information to tz@elsie.nci.nih.gov.
diff --git a/contrib/tzcode/zic/Theory b/contrib/tzcode/zic/Theory
new file mode 100644
index 000000000000..752125c95a56
--- /dev/null
+++ b/contrib/tzcode/zic/Theory
@@ -0,0 +1,570 @@
+@(#)Theory	8.4
+This file is in the public domain, so clarified as of
+2009-05-17 by Arthur David Olson.
+$FreeBSD$
+
+----- Outline -----
+
+	Time and date functions
+	Names of time zone regions
+	Time zone abbreviations
+	Calendrical issues
+	Time and time zones on Mars
+
+----- Time and date functions -----
+
+These time and date functions are upwards compatible with POSIX,
+an international standard for UNIX-like systems.
+As of this writing, the current edition of POSIX is:
+
+  Standard for Information technology
+  -- Portable Operating System Interface (POSIX (R))
+  -- System Interfaces
+  IEEE Std 1003.1, 2004 Edition
+  <http://www.opengroup.org/online-pubs?DOC=7999959899>
+  <http://www.opengroup.org/pubs/catalog/t041.htm>
+
+POSIX has the following properties and limitations.
+
+*	In POSIX, time display in a process is controlled by the
+	environment variable TZ.  Unfortunately, the POSIX TZ string takes
+	a form that is hard to describe and is error-prone in practice.
+	Also, POSIX TZ strings can't deal with other (for example, Israeli)
+	daylight saving time rules, or situations where more than two
+	time zone abbreviations are used in an area.
+
+	The POSIX TZ string takes the following form:
+
+		stdoffset[dst[offset],date[/time],date[/time]]
+
+	where:
+
+	std and dst
+		are 3 or more characters specifying the standard
+		and daylight saving time (DST) zone names.
+		Starting with POSIX.1-2001, std and dst may also be
+		in a quoted form like "<UTC+10>"; this allows
+		"+" and "-" in the names.
+	offset
+		is of the form `[-]hh:[mm[:ss]]' and specifies the
+		offset west of UTC.  The default DST offset is one hour
+		ahead of standard time.
+	date[/time],date[/time]
+		specifies the beginning and end of DST.  If this is absent,
+		the system supplies its own rules for DST, and these can
+		differ from year to year; typically US DST rules are used.
+	time
+		takes the form `hh:[mm[:ss]]' and defaults to 02:00.
+	date
+		takes one of the following forms:
+		Jn (1<=n<=365)
+			origin-1 day number not counting February 29
+		n (0<=n<=365)
+			origin-0 day number counting February 29 if present
+		Mm.n.d (0[Sunday]<=d<=6[Saturday], 1<=n<=5, 1<=m<=12)
+			for the dth day of week n of month m of the year,
+			where week 1 is the first week in which day d appears,
+			and `5' stands for the last week in which day d appears
+			(which may be either the 4th or 5th week).
+
+	Here is an example POSIX TZ string, for US Pacific time using rules
+	appropriate from 1987 through 2006:
+
+		TZ='PST8PDT,M4.1.0/02:00,M10.5.0/02:00'
+
+	This POSIX TZ string is hard to remember, and mishandles time stamps
+	before 1987 and after 2006.  With this package you can use this
+	instead:
+
+		TZ='America/Los_Angeles'
+
+*	POSIX does not define the exact meaning of TZ values like "EST5EDT".
+	Typically the current US DST rules are used to interpret such values,
+	but this means that the US DST rules are compiled into each program
+	that does time conversion.  This means that when US time conversion
+	rules change (as in the United States in 1987), all programs that
+	do time conversion must be recompiled to ensure proper results.
+
+*	In POSIX, there's no tamper-proof way for a process to learn the
+	system's best idea of local wall clock.  (This is important for
+	applications that an administrator wants used only at certain times--
+	without regard to whether the user has fiddled the "TZ" environment
+	variable.  While an administrator can "do everything in UTC" to get
+	around the problem, doing so is inconvenient and precludes handling
+	daylight saving time shifts--as might be required to limit phone
+	calls to off-peak hours.)
+
+*	POSIX requires that systems ignore leap seconds.
+
+These are the extensions that have been made to the POSIX functions:
+
+*	The "TZ" environment variable is used in generating the name of a file
+	from which time zone information is read (or is interpreted a la
+	POSIX); "TZ" is no longer constrained to be a three-letter time zone
+	name followed by a number of hours and an optional three-letter
+	daylight time zone name.  The daylight saving time rules to be used
+	for a particular time zone are encoded in the time zone file;
+	the format of the file allows U.S., Australian, and other rules to be
+	encoded, and allows for situations where more than two time zone
+	abbreviations are used.
+
+	It was recognized that allowing the "TZ" environment variable to
+	take on values such as "America/New_York" might cause "old" programs
+	(that expect "TZ" to have a certain form) to operate incorrectly;
+	consideration was given to using some other environment variable
+	(for example, "TIMEZONE") to hold the string used to generate the
+	time zone information file name.  In the end, however, it was decided
+	to continue using "TZ":  it is widely used for time zone purposes;
+	separately maintaining both "TZ" and "TIMEZONE" seemed a nuisance;
+	and systems where "new" forms of "TZ" might cause problems can simply
+	use TZ values such as "EST5EDT" which can be used both by
+	"new" programs (a la POSIX) and "old" programs (as zone names and
+	offsets).
+
+*	To handle places where more than two time zone abbreviations are used,
+	the functions "localtime" and "gmtime" set tzname[tmp->tm_isdst]
+	(where "tmp" is the value the function returns) to the time zone
+	abbreviation to be used.  This differs from POSIX, where the elements
+	of tzname are only changed as a result of calls to tzset.
+
+*	Since the "TZ" environment variable can now be used to control time
+	conversion, the "daylight" and "timezone" variables are no longer
+	needed.  (These variables are defined and set by "tzset"; however, their
+	values will not be used by "localtime.")
+
+*	The "localtime" function has been set up to deliver correct results
+	for near-minimum or near-maximum time_t values.  (A comment in the
+	source code tells how to get compatibly wrong results).
+
+*	A function "tzsetwall" has been added to arrange for the system's
+	best approximation to local wall clock time to be delivered by
+	subsequent calls to "localtime."  Source code for portable
+	applications that "must" run on local wall clock time should call
+	"tzsetwall();" if such code is moved to "old" systems that don't
+	provide tzsetwall, you won't be able to generate an executable program.
+	(These time zone functions also arrange for local wall clock time to be
+	used if tzset is called--directly or indirectly--and there's no "TZ"
+	environment variable; portable applications should not, however, rely
+	on this behavior since it's not the way SVR2 systems behave.)
+
+*	These functions can account for leap seconds, thanks to Bradley White.
+
+Points of interest to folks with other systems:
+
+*	This package is already part of many POSIX-compliant hosts,
+	including BSD, HP, Linux, Network Appliance, SCO, SGI, and Sun.
+	On such hosts, the primary use of this package
+	is to update obsolete time zone rule tables.
+	To do this, you may need to compile the time zone compiler
+	`zic' supplied with this package instead of using the system `zic',
+	since the format of zic's input changed slightly in late 1994,
+	and many vendors still do not support the new input format.
+
+*	The UNIX Version 7 "timezone" function is not present in this package;
+	it's impossible to reliably map timezone's arguments (a "minutes west
+	of GMT" value and a "daylight saving time in effect" flag) to a
+	time zone abbreviation, and we refuse to guess.
+	Programs that in the past used the timezone function may now examine
+	tzname[localtime(&clock)->tm_isdst] to learn the correct time
+	zone abbreviation to use.  Alternatively, use
+	localtime(&clock)->tm_zone if this has been enabled.
+
+*	The 4.2BSD gettimeofday function is not used in this package.
+	This formerly let users obtain the current UTC offset and DST flag,
+	but this functionality was removed in later versions of BSD.
+
+*	In SVR2, time conversion fails for near-minimum or near-maximum
+	time_t values when doing conversions for places that don't use UTC.
+	This package takes care to do these conversions correctly.
+
+The functions that are conditionally compiled if STD_INSPIRED is defined
+should, at this point, be looked on primarily as food for thought.  They are
+not in any sense "standard compatible"--some are not, in fact, specified in
+*any* standard.  They do, however, represent responses of various authors to
+standardization proposals.
+
+Other time conversion proposals, in particular the one developed by folks at
+Hewlett Packard, offer a wider selection of functions that provide capabilities
+beyond those provided here.  The absence of such functions from this package
+is not meant to discourage the development, standardization, or use of such
+functions.  Rather, their absence reflects the decision to make this package
+contain valid extensions to POSIX, to ensure its broad acceptability.  If
+more powerful time conversion functions can be standardized, so much the
+better.
+
+
+----- Names of time zone rule files -----
+
+The time zone rule file naming conventions attempt to strike a balance
+among the following goals:
+
+ * Uniquely identify every national region where clocks have all
+   agreed since 1970.  This is essential for the intended use: static
+   clocks keeping local civil time.
+
+ * Indicate to humans as to where that region is.  This simplifes use.
+
+ * Be robust in the presence of political changes.  This reduces the
+   number of updates and backward-compatibility hacks.  For example,
+   names of countries are ordinarily not used, to avoid
+   incompatibilities when countries change their name
+   (e.g. Zaire->Congo) or when locations change countries
+   (e.g. Hong Kong from UK colony to China).
+
+ * Be portable to a wide variety of implementations.
+   This promotes use of the technology.
+
+ * Use a consistent naming convention over the entire world.
+   This simplifies both use and maintenance.
+
+This naming convention is not intended for use by inexperienced users
+to select TZ values by themselves (though they can of course examine
+and reuse existing settings).  Distributors should provide
+documentation and/or a simple selection interface that explains the
+names; see the 'tzselect' program supplied with this distribution for
+one example.
+
+Names normally have the form AREA/LOCATION, where AREA is the name
+of a continent or ocean, and LOCATION is the name of a specific
+location within that region.  North and South America share the same
+area, `America'.  Typical names are `Africa/Cairo', `America/New_York',
+and `Pacific/Honolulu'.
+
+Here are the general rules used for choosing location names,
+in decreasing order of importance:
+
+	Use only valid POSIX file name components (i.e., the parts of
+		names other than `/').  Within a file name component,
+		use only ASCII letters, `.', `-' and `_'.  Do not use
+		digits, as that might create an ambiguity with POSIX
+		TZ strings.  A file name component must not exceed 14
+		characters or start with `-'.  E.g., prefer `Brunei'
+		to `Bandar_Seri_Begawan'.
+	Include at least one location per time zone rule set per country.
+		One such location is enough.  Use ISO 3166 (see the file
+		iso3166.tab) to help decide whether something is a country.
+		However, uninhabited ISO 3166 regions like Bouvet Island
+		do not need locations, since local time is not defined there.
+	If all the clocks in a country's region have agreed since 1970,
+		don't bother to include more than one location
+		even if subregions' clocks disagreed before 1970.
+		Otherwise these tables would become annoyingly large.
+	If a name is ambiguous, use a less ambiguous alternative;
+		e.g. many cities are named San Jose and Georgetown, so
+		prefer `Costa_Rica' to `San_Jose' and `Guyana' to `Georgetown'.
+	Keep locations compact.  Use cities or small islands, not countries
+		or regions, so that any future time zone changes do not split
+		locations into different time zones.  E.g. prefer `Paris'
+		to `France', since France has had multiple time zones.
+	Use mainstream English spelling, e.g. prefer `Rome' to `Roma', and
+		prefer `Athens' to the true name (which uses Greek letters).
+		The POSIX file name restrictions encourage this rule.
+	Use the most populous among locations in a country's time zone,
+		e.g. prefer `Shanghai' to `Beijing'.  Among locations with
+		similar populations, pick the best-known location,
+		e.g. prefer `Rome' to `Milan'.
+	Use the singular form, e.g. prefer `Canary' to `Canaries'.
+	Omit common suffixes like `_Islands' and `_City', unless that
+		would lead to ambiguity.  E.g. prefer `Cayman' to
+		`Cayman_Islands' and `Guatemala' to `Guatemala_City',
+		but prefer `Mexico_City' to `Mexico' because the country
+		of Mexico has several time zones.
+	Use `_' to represent a space.
+	Omit `.' from abbreviations in names, e.g. prefer `St_Helena'
+		to `St._Helena'.
+	Do not change established names if they only marginally
+		violate the above rules.  For example, don't change
+		the existing name `Rome' to `Milan' merely because
+		Milan's population has grown to be somewhat greater
+		than Rome's.
+	If a name is changed, put its old spelling in the `backward' file.
+
+The file `zone.tab' lists the geographical locations used to name
+time zone rule files.  It is intended to be an exhaustive list
+of canonical names for geographic regions.
+
+Older versions of this package used a different naming scheme,
+and these older names are still supported.
+See the file `backward' for most of these older names
+(e.g. `US/Eastern' instead of `America/New_York').
+The other old-fashioned names still supported are
+`WET', `CET', `MET', `EET' (see the file `europe'),
+and `Factory' (see the file `factory').
+
+
+----- Time zone abbreviations -----
+
+When this package is installed, it generates time zone abbreviations
+like `EST' to be compatible with human tradition and POSIX.
+Here are the general rules used for choosing time zone abbreviations,
+in decreasing order of importance:
+
+	Use abbreviations that consist of three or more ASCII letters.
+		Previous editions of this database also used characters like
+		' ' and '?', but these characters have a special meaning to
+		the shell and cause commands like
+			set `date`
+		to have unexpected effects.
+		Previous editions of this rule required upper-case letters,
+		but the Congressman who introduced Chamorro Standard Time
+		preferred "ChST", so the rule has been relaxed.
+
+		This rule guarantees that all abbreviations could have
+		been specified by a POSIX TZ string.  POSIX
+		requires at least three characters for an
+		abbreviation.  POSIX through 2000 says that an abbreviation
+		cannot start with ':', and cannot contain ',', '-',
+		'+', NUL, or a digit.  POSIX from 2001 on changes this
+		rule to say that an abbreviation can contain only '-', '+',
+		and alphanumeric characters from the portable character set
+		in the current locale.  To be portable to both sets of
+		rules, an abbreviation must therefore use only ASCII
+		letters.
+
+	Use abbreviations that are in common use among English-speakers,
+		e.g. `EST' for Eastern Standard Time in North America.
+		We assume that applications translate them to other languages
+		as part of the normal localization process; for example,
+		a French application might translate `EST' to `HNE'.
+
+	For zones whose times are taken from a city's longitude, use the
+		traditional xMT notation, e.g. `PMT' for Paris Mean Time.
+		The only name like this in current use is `GMT'.
+
+	If there is no common English abbreviation, abbreviate the English
+		translation of the usual phrase used by native speakers.
+		If this is not available or is a phrase mentioning the country
+		(e.g. ``Cape Verde Time''), then:
+
+		When a country has a single or principal time zone region,
+			append `T' to the country's ISO	code, e.g. `CVT' for
+			Cape Verde Time.  For summer time append `ST';
+			for double summer time append `DST'; etc.
+		When a country has multiple time zones, take the first three
+			letters of an English place name identifying each zone
+			and then append `T', `ST', etc. as before;
+			e.g. `VLAST' for VLAdivostok Summer Time.
+
+	Use UTC (with time zone abbreviation "zzz") for locations while
+		uninhabited.  The "zzz" mnemonic is that these locations are,
+		in some sense, asleep.
+
+Application writers should note that these abbreviations are ambiguous
+in practice: e.g. `EST' has a different meaning in Australia than
+it does in the United States.  In new applications, it's often better
+to use numeric UTC offsets like `-0500' instead of time zone
+abbreviations like `EST'; this avoids the ambiguity.
+
+
+----- Calendrical issues -----
+
+Calendrical issues are a bit out of scope for a time zone database,
+but they indicate the sort of problems that we would run into if we
+extended the time zone database further into the past.  An excellent
+resource in this area is Nachum Dershowitz and Edward M. Reingold,
+<a href="http://emr.cs.iit.edu/home/reingold/calendar-book/third-edition/">
+Calendrical Calculations: Third Edition
+</a>, Cambridge University Press (2008).  Other information and
+sources are given below.  They sometimes disagree.
+
+
+France
+
+Gregorian calendar adopted 1582-12-20.
+French Revolutionary calendar used 1793-11-24 through 1805-12-31,
+and (in Paris only) 1871-05-06 through 1871-05-23.
+
+
+Russia
+
+From Chris Carrier (1996-12-02):
+On 1929-10-01 the Soviet Union instituted an ``Eternal Calendar''
+with 30-day months plus 5 holidays, with a 5-day week.
+On 1931-12-01 it changed to a 6-day week; in 1934 it reverted to the
+Gregorian calendar while retaining the 6-day week; on 1940-06-27 it
+reverted to the 7-day week.  With the 6-day week the usual days
+off were the 6th, 12th, 18th, 24th and 30th of the month.
+(Source: Evitiar Zerubavel, _The Seven Day Circle_)
+
+
+Mark Brader reported a similar story in "The Book of Calendars", edited
+by Frank Parise (1982, Facts on File, ISBN 0-8719-6467-8), page 377.  But:
+
+From: Petteri Sulonen (via Usenet)
+Date: 14 Jan 1999 00:00:00 GMT
+...
+
+If your source is correct, how come documents between 1929 -- 1940 were
+still dated using the conventional, Gregorian calendar?
+
+I can post a scan of a document dated December 1, 1934, signed by
+Yenukidze, the secretary, on behalf of Kalinin, the President of the
+Executive Committee of the Supreme Soviet, if you like.
+
+
+
+Sweden (and Finland)
+
+From: Mark Brader
+<a href="news:1996Jul6.012937.29190@sq.com">
+Subject: Re: Gregorian reform -- a part of locale?
+</a>
+Date: 1996-07-06
+
+In 1700, Denmark made the transition from Julian to Gregorian.  Sweden
+decided to *start* a transition in 1700 as well, but rather than have one of
+those unsightly calendar gaps :-), they simply decreed that the next leap
+year after 1696 would be in 1744 -- putting the whole country on a calendar
+different from both Julian and Gregorian for a period of 40 years.
+
+However, in 1704 something went wrong and the plan was not carried through;
+they did, after all, have a leap year that year.  And one in 1708.  In 1712
+they gave it up and went back to Julian, putting 30 days in February that
+year!...
+
+Then in 1753, Sweden made the transition to Gregorian in the usual manner,
+getting there only 13 years behind the original schedule.
+
+(A previous posting of this story was challenged, and Swedish readers
+produced the following references to support it: "Tiderakning och historia"
+by Natanael Beckman (1924) and "Tid, en bok om tiderakning och
+kalendervasen" by Lars-Olof Lode'n (no date was given).)
+
+
+Grotefend's data
+
+From: "Michael Palmer" [with one obvious typo fixed]
+Subject: Re: Gregorian Calendar (was Re: Another FHC related question
+Newsgroups: soc.genealogy.german
+Date: Tue, 9 Feb 1999 02:32:48 -800
+...
+
+The following is a(n incomplete) listing, arranged chronologically, of
+European states, with the date they converted from the Julian to the
+Gregorian calendar:
+
+04/15 Oct 1582 - Italy (with exceptions), Spain, Portugal, Poland (Roman
+                 Catholics and Danzig only)
+09/20 Dec 1582 - France, Lorraine
+
+21 Dec 1582/
+   01 Jan 1583 - Holland, Brabant, Flanders, Hennegau
+10/21 Feb 1583 - bishopric of Liege (L"uttich)
+13/24 Feb 1583 - bishopric of Augsburg
+04/15 Oct 1583 - electorate of Trier
+05/16 Oct 1583 - Bavaria, bishoprics of Freising, Eichstedt, Regensburg,
+                 Salzburg, Brixen
+13/24 Oct 1583 - Austrian Oberelsass and Breisgau
+20/31 Oct 1583 - bishopric of Basel
+02/13 Nov 1583 - duchy of J"ulich-Berg
+02/13 Nov 1583 - electorate and city of K"oln
+04/15 Nov 1583 - bishopric of W"urzburg
+11/22 Nov 1583 - electorate of Mainz
+16/27 Nov 1583 - bishopric of Strassburg and the margraviate of Baden
+17/28 Nov 1583 - bishopric of M"unster and duchy of Cleve
+14/25 Dec 1583 - Steiermark
+
+06/17 Jan 1584 - Austria and Bohemia
+11/22 Jan 1584 - Luzern, Uri, Schwyz, Zug, Freiburg, Solothurn
+12/23 Jan 1584 - Silesia and the Lausitz
+22 Jan/
+   02 Feb 1584 - Hungary (legally on 21 Oct 1587)
+      Jun 1584 - Unterwalden
+01/12 Jul 1584 - duchy of Westfalen
+
+16/27 Jun 1585 - bishopric of Paderborn
+
+14/25 Dec 1590 - Transylvania
+
+22 Aug/
+   02 Sep 1612 - duchy of Prussia
+
+13/24 Dec 1614 - Pfalz-Neuburg
+
+          1617 - duchy of Kurland (reverted to the Julian calendar in
+                 1796)
+
+          1624 - bishopric of Osnabr"uck
+
+          1630 - bishopric of Minden
+
+15/26 Mar 1631 - bishopric of Hildesheim
+
+          1655 - Kanton Wallis
+
+05/16 Feb 1682 - city of Strassburg
+
+18 Feb/
+   01 Mar 1700 - Protestant Germany (including Swedish possessions in
+                 Germany), Denmark, Norway
+30 Jun/
+   12 Jul 1700 - Gelderland, Zutphen
+10 Nov/
+   12 Dec 1700 - Utrecht, Overijssel
+
+31 Dec 1700/
+   12 Jan 1701 - Friesland, Groningen, Z"urich, Bern, Basel, Geneva,
+                 Turgau, and Schaffhausen
+
+          1724 - Glarus, Appenzell, and the city of St. Gallen
+
+01 Jan 1750    - Pisa and Florence
+
+02/14 Sep 1752 - Great Britain
+
+17 Feb/
+   01 Mar 1753 - Sweden
+
+1760-1812      - Graub"unden
+
+The Russian empire (including Finland and the Baltic states) did not
+convert to the Gregorian calendar until the Soviet revolution of 1917.
+
+Source:  H. Grotefend, _Taschenbuch der Zeitrechnung des deutschen
+Mittelalters und der Neuzeit_, herausgegeben von Dr. O. Grotefend
+(Hannover:  Hahnsche Buchhandlung, 1941), pp. 26-28.
+
+
+----- Time and time zones on Mars -----
+
+Some people have adjusted their work schedules to fit Mars time.
+Dozens of special Mars watches were built for Jet Propulsion
+Laboratory workers who kept Mars time during the Mars Exploration
+Rovers mission (2004).  These timepieces look like normal Seikos and
+Citizens but use Mars seconds rather than terrestrial seconds.
+
+A Mars solar day is called a "sol" and has a mean period equal to
+about 24 hours 39 minutes 35.244 seconds in terrestrial time.  It is
+divided into a conventional 24-hour clock, so each Mars second equals
+about 1.02749125 terrestrial seconds.
+
+The prime meridian of Mars goes through the center of the crater
+Airy-0, named in honor of the British astronomer who built the
+Greenwich telescope that defines Earth's prime meridian.  Mean solar
+time on the Mars prime meridian is called Mars Coordinated Time (MTC).
+
+Each landed mission on Mars has adopted a different reference for
+solar time keeping, so there is no real standard for Mars time zones.
+For example, the Mars Exploration Rover project (2004) defined two
+time zones "Local Solar Time A" and "Local Solar Time B" for its two
+missions, each zone designed so that its time equals local true solar
+time at approximately the middle of the nominal mission.  Such a "time
+zone" is not particularly suited for any application other than the
+mission itself.
+
+Many calendars have been proposed for Mars, but none have achieved
+wide acceptance.  Astronomers often use Mars Sol Date (MSD) which is a
+sequential count of Mars solar days elapsed since about 1873-12-29
+12:00 GMT.
+
+The tz database does not currently support Mars time, but it is
+documented here in the hopes that support will be added eventually.
+
+Sources:
+
+Michael Allison and Robert Schmunk,
+"Technical Notes on Mars Solar Time as Adopted by the Mars24 Sunclock"
+<http://www.giss.nasa.gov/tools/mars24/help/notes.html> (2004-07-30).
+
+Jia-Rui Chong, "Workdays Fit for a Martian", Los Angeles Times
+(2004-01-14), pp A1, A20-A21.
diff --git a/contrib/tzcode/zic/ialloc.c b/contrib/tzcode/zic/ialloc.c
new file mode 100644
index 000000000000..1694c2905c74
--- /dev/null
+++ b/contrib/tzcode/zic/ialloc.c
@@ -0,0 +1,91 @@
+/*
+** This file is in the public domain, so clarified as of
+** 2006-07-17 by Arthur David Olson.
+*/
+
+#ifndef lint
+#ifndef NOID
+static const char	elsieid[] = "@(#)ialloc.c	8.30";
+#endif /* !defined NOID */
+#endif /* !defined lint */
+
+#ifndef lint
+static const char rcsid[] =
+  "$FreeBSD$";
+#endif /* not lint */
+
+/*LINTLIBRARY*/
+
+#include "private.h"
+
+#define nonzero(n)	(((n) == 0) ? 1 : (n))
+
+char *
+imalloc(n)
+const int	n;
+{
+	return malloc((size_t) nonzero(n));
+}
+
+char *
+icalloc(nelem, elsize)
+int	nelem;
+int	elsize;
+{
+	if (nelem == 0 || elsize == 0)
+		nelem = elsize = 1;
+	return calloc((size_t) nelem, (size_t) elsize);
+}
+
+void *
+irealloc(pointer, size)
+void * const	pointer;
+const int	size;
+{
+	if (pointer == NULL)
+		return imalloc(size);
+	return realloc((void *) pointer, (size_t) nonzero(size));
+}
+
+char *
+icatalloc(old, new)
+char * const		old;
+const char * const	new;
+{
+	register char *	result;
+	register int	oldsize, newsize;
+
+	newsize = (new == NULL) ? 0 : strlen(new);
+	if (old == NULL)
+		oldsize = 0;
+	else if (newsize == 0)
+		return old;
+	else	oldsize = strlen(old);
+	if ((result = irealloc(old, oldsize + newsize + 1)) != NULL)
+		if (new != NULL)
+			(void) strcpy(result + oldsize, new);
+	return result;
+}
+
+char *
+icpyalloc(string)
+const char * const	string;
+{
+	return icatalloc((char *) NULL, string);
+}
+
+void
+ifree(p)
+char * const	p;
+{
+	if (p != NULL)
+		(void) free(p);
+}
+
+void
+icfree(p)
+char * const	p;
+{
+	if (p != NULL)
+		(void) free(p);
+}
diff --git a/contrib/tzcode/zic/private.h b/contrib/tzcode/zic/private.h
new file mode 100644
index 000000000000..ecbf6124859a
--- /dev/null
+++ b/contrib/tzcode/zic/private.h
@@ -0,0 +1,272 @@
+#ifndef PRIVATE_H
+
+#define PRIVATE_H
+
+/*
+** This file is in the public domain, so clarified as of
+** 1996-06-05 by Arthur David Olson.
+*/
+
+/*
+ * FreeBSD modifications: separate libc's privates from zic's.
+ * This makes it easier when we need to update one but not the other.
+ * I have removed all of the ifdef spaghetti which is not relevant to
+ * zic from this file.
+ *
+ * $FreeBSD$
+ */
+
+/*
+** This header is for use ONLY with the time conversion code.
+** There is no guarantee that it will remain unchanged,
+** or that it will remain at all.
+** Do NOT copy it to any system include directory.
+** Thank you!
+*/
+
+/*
+** ID
+*/
+
+#ifndef lint
+#ifndef NOID
+static const char	privatehid[] = "@(#)private.h	8.6";
+#endif /* !defined NOID */
+#endif /* !defined lint */
+
+#define GRANDPARENTED	"Local time zone must be set--see zic manual page"
+
+/*
+** Defaults for preprocessor symbols.
+** You can override these in your C compiler options, e.g. `-DHAVE_ADJTIME=0'.
+*/
+
+#ifndef HAVE_GETTEXT
+#define HAVE_GETTEXT		0
+#endif /* !defined HAVE_GETTEXT */
+
+#ifndef HAVE_SYMLINK
+#define HAVE_SYMLINK		1
+#endif /* !defined HAVE_SYMLINK */
+
+#ifndef HAVE_SYS_STAT_H
+#define HAVE_SYS_STAT_H		1
+#endif /* !defined HAVE_SYS_STAT_H */
+
+#ifndef HAVE_SYS_WAIT_H
+#define HAVE_SYS_WAIT_H		1
+#endif /* !defined HAVE_SYS_WAIT_H */
+
+#ifndef HAVE_UNISTD_H
+#define HAVE_UNISTD_H		1
+#endif /* !defined HAVE_UNISTD_H */
+
+/*
+** Nested includes
+*/
+
+#include "sys/types.h"	/* for time_t */
+#include "stdio.h"
+#include "errno.h"
+#include "string.h"
+#include "limits.h"	/* for CHAR_BIT et al. */
+#include "time.h"
+#include "stdlib.h"
+
+#if HAVE_GETTEXT
+#include "libintl.h"
+#endif /* HAVE_GETTEXT */
+
+#if HAVE_SYS_WAIT_H
+#include <sys/wait.h>	/* for WIFEXITED and WEXITSTATUS */
+#endif /* HAVE_SYS_WAIT_H */
+
+#if HAVE_UNISTD_H
+#include "unistd.h"	/* for F_OK and R_OK, and other POSIX goodness */
+#endif /* HAVE_UNISTD_H */
+
+#ifndef F_OK
+#define F_OK	0
+#endif /* !defined F_OK */
+#ifndef R_OK
+#define R_OK	4
+#endif /* !defined R_OK */
+
+/* Unlike <ctype.h>'s isdigit, this also works if c < 0 | c > UCHAR_MAX. */
+#define is_digit(c) ((unsigned)(c) - '0' <= 9)
+
+/*
+** Define HAVE_STDINT_H's default value here, rather than at the
+** start, since __GLIBC__'s value depends on previously-included
+** files.
+** (glibc 2.1 and later have stdint.h, even with pre-C99 compilers.)
+*/
+#ifndef HAVE_STDINT_H
+#define HAVE_STDINT_H \
+       (199901 <= __STDC_VERSION__ || \
+       2 < (__GLIBC__ + (0 < __GLIBC_MINOR__)))
+#endif /* !defined HAVE_STDINT_H */
+
+#if HAVE_STDINT_H
+#include "stdint.h"
+#endif /* !HAVE_STDINT_H */
+
+#ifndef INT_FAST64_MAX
+/* Pre-C99 GCC compilers define __LONG_LONG_MAX__ instead of LLONG_MAX.  */
+#if defined LLONG_MAX || defined __LONG_LONG_MAX__
+typedef long long      int_fast64_t;
+#else /* ! (defined LLONG_MAX || defined __LONG_LONG_MAX__) */
+#if (LONG_MAX >> 31) < 0xffffffff
+Please use a compiler that supports a 64-bit integer type (or wider);
+you may need to compile with "-DHAVE_STDINT_H".
+#endif /* (LONG_MAX >> 31) < 0xffffffff */
+typedef long           int_fast64_t;
+#endif /* ! (defined LLONG_MAX || defined __LONG_LONG_MAX__) */
+#endif /* !defined INT_FAST64_MAX */
+
+#ifndef INT32_MAX
+#define INT32_MAX 0x7fffffff
+#endif /* !defined INT32_MAX */
+#ifndef INT32_MIN
+#define INT32_MIN (-1 - INT32_MAX)
+#endif /* !defined INT32_MIN */
+
+/*
+** Workarounds for compilers/systems.
+ */
+
+/* 
+** Some time.h implementations don't declare asctime_r.
+** Others might define it as a macro.
+** Fix the former without affecting the latter.
+ */
+#ifndef asctime_r
+extern char *  asctime_r(struct tm const *, char *);
+#endif
+
+
+
+/*
+** Private function declarations.
+*/
+char *		icalloc (int nelem, int elsize);
+char *		icatalloc (char * old, const char * new);
+char *		icpyalloc (const char * string);
+char *		imalloc (int n);
+void *		irealloc (void * pointer, int size);
+void		icfree (char * pointer);
+void		ifree (char * pointer);
+const char *	scheck (const char *string, const char *format);
+
+/*
+** Finally, some convenience items.
+*/
+
+#ifndef TRUE
+#define TRUE	1
+#endif /* !defined TRUE */
+
+#ifndef FALSE
+#define FALSE	0
+#endif /* !defined FALSE */
+
+#ifndef TYPE_BIT
+#define TYPE_BIT(type)	(sizeof (type) * CHAR_BIT)
+#endif /* !defined TYPE_BIT */
+
+#ifndef TYPE_SIGNED
+#define TYPE_SIGNED(type) (((type) -1) < 0)
+#endif /* !defined TYPE_SIGNED */
+
+/*
+** Since the definition of TYPE_INTEGRAL contains floating point numbers,
+** it cannot be used in preprocessor directives.
+*/
+
+#ifndef TYPE_INTEGRAL
+#define TYPE_INTEGRAL(type) (((type) 0.5) != 0.5)
+#endif /* !defined TYPE_INTEGRAL */
+
+#ifndef INT_STRLEN_MAXIMUM
+/*
+** 302 / 1000 is log10(2.0) rounded up.
+** Subtract one for the sign bit if the type is signed;
+** add one for integer division truncation;
+** add one more for a minus sign if the type is signed.
+*/
+#define INT_STRLEN_MAXIMUM(type) \
+	((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 1000 + \
+	1 + TYPE_SIGNED(type))
+#endif /* !defined INT_STRLEN_MAXIMUM */
+
+/*
+** INITIALIZE(x)
+*/
+
+#ifndef GNUC_or_lint
+#ifdef lint
+#define GNUC_or_lint
+#endif /* defined lint */
+#ifndef lint
+#ifdef __GNUC__
+#define GNUC_or_lint
+#endif /* defined __GNUC__ */
+#endif /* !defined lint */
+#endif /* !defined GNUC_or_lint */
+
+#ifndef INITIALIZE
+#ifdef GNUC_or_lint
+#define INITIALIZE(x)	((x) = 0)
+#endif /* defined GNUC_or_lint */
+#ifndef GNUC_or_lint
+#define INITIALIZE(x)
+#endif /* !defined GNUC_or_lint */
+#endif /* !defined INITIALIZE */
+
+/*
+** For the benefit of GNU folk...
+** `_(MSGID)' uses the current locale's message library string for MSGID.
+** The default is to use gettext if available, and use MSGID otherwise.
+*/
+
+#ifndef _
+#if HAVE_GETTEXT
+#define _(msgid) gettext(msgid)
+#else /* !HAVE_GETTEXT */
+#define _(msgid) msgid
+#endif /* !HAVE_GETTEXT */
+#endif /* !defined _ */
+
+#ifndef TZ_DOMAIN
+#define TZ_DOMAIN "tz"
+#endif /* !defined TZ_DOMAIN */
+
+/*
+** UNIX was a registered trademark of The Open Group in 2003.
+*/
+
+#ifndef YEARSPERREPEAT
+#define YEARSPERREPEAT		400	/* years before a Gregorian repeat */
+#endif /* !defined YEARSPERREPEAT */
+
+/*
+** The Gregorian year averages 365.2425 days, which is 31556952 seconds.
+*/
+
+#ifndef AVGSECSPERYEAR
+#define AVGSECSPERYEAR		31556952L
+#endif /* !defined AVGSECSPERYEAR */
+
+#ifndef SECSPERREPEAT
+#define SECSPERREPEAT		((int_fast64_t) YEARSPERREPEAT * (int_fast64_t) AVGSECSPERYEAR)
+#endif /* !defined SECSPERREPEAT */
+
+#ifndef SECSPERREPEAT_BITS
+#define SECSPERREPEAT_BITS	34	/* ceil(log2(SECSPERREPEAT)) */
+#endif /* !defined SECSPERREPEAT_BITS */
+
+  /*
+  ** UNIX was a registered trademark of The Open Group in 2003.
+  */
+
+#endif /* !defined PRIVATE_H */
diff --git a/contrib/tzcode/zic/scheck.c b/contrib/tzcode/zic/scheck.c
new file mode 100644
index 000000000000..abdb4ba5c79b
--- /dev/null
+++ b/contrib/tzcode/zic/scheck.c
@@ -0,0 +1,68 @@
+/*
+** This file is in the public domain, so clarified as of
+** 2006-07-17 by Arthur David Olson.
+*/
+
+#ifndef lint
+#ifndef NOID
+static const char	elsieid[] = "@(#)scheck.c	8.19";
+#endif /* !defined lint */
+#endif /* !defined NOID */
+
+#ifndef lint
+static const char rcsid[] =
+  "$FreeBSD$";
+#endif /* not lint */
+
+/*LINTLIBRARY*/
+
+#include "private.h"
+
+const char *
+scheck(string, format)
+const char * const	string;
+const char * const	format;
+{
+	register char *		fbuf;
+	register const char *	fp;
+	register char *		tp;
+	register int		c;
+	register const char *	result;
+	char			dummy;
+
+	result = "";
+	if (string == NULL || format == NULL)
+		return result;
+	fbuf = imalloc((int) (2 * strlen(format) + 4));
+	if (fbuf == NULL)
+		return result;
+	fp = format;
+	tp = fbuf;
+	while ((*tp++ = c = *fp++) != '\0') {
+		if (c != '%')
+			continue;
+		if (*fp == '%') {
+			*tp++ = *fp++;
+			continue;
+		}
+		*tp++ = '*';
+		if (*fp == '*')
+			++fp;
+		while (is_digit(*fp))
+			*tp++ = *fp++;
+		if (*fp == 'l' || *fp == 'h')
+			*tp++ = *fp++;
+		else if (*fp == '[')
+			do *tp++ = *fp++;
+				while (*fp != '\0' && *fp != ']');
+		if ((*tp++ = *fp++) == '\0')
+			break;
+	}
+	*(tp - 1) = '%';
+	*tp++ = 'c';
+	*tp = '\0';
+	if (sscanf(string, fbuf, &dummy) != 1)
+		result = (char *) format;
+	ifree(fbuf);
+	return result;
+}
diff --git a/contrib/tzcode/zic/zdump.8 b/contrib/tzcode/zic/zdump.8
new file mode 100644
index 000000000000..9ac0a03230dd
--- /dev/null
+++ b/contrib/tzcode/zic/zdump.8
@@ -0,0 +1,63 @@
+.\"
+.\"	@(#)zdump.8	8.2
+.\" This file is in the public domain, so clarified as of
+.\" 2009-05-17 by Arthur David Olson.
+.\" $FreeBSD$
+.\"
+.Dd June 20, 2004
+.Dt ZDUMP 8
+.Os
+.Sh NAME
+.Nm zdump
+.Nd timezone dumper
+.Sh SYNOPSIS
+.Nm
+.Op Fl -version
+.Op Fl v
+.Op Fl c Ar [loyear,]hiyear
+.Op Ar zonename ...
+.Sh DESCRIPTION
+The
+.Nm
+utility prints the current time in each
+.Ar zonename
+named on the command line.
+.Pp
+The following options are available:
+.Bl -tag -width indent
+.It Fl -version
+Output version information and exit.
+.It Fl v
+For each
+.Ar zonename
+on the command line,
+print the time at the lowest possible time value,
+the time one day after the lowest possible time value,
+the times both one second before and exactly at
+each detected time discontinuity,
+the time at one day less than the highest possible time value,
+and the time at the highest possible time value,
+Each line ends with
+.Em isdst=1
+if the given time is Daylight Saving Time or
+.Em isdst=0
+otherwise.
+.It Fl c Ar loyear,hiyear
+Cut off verbose output near the start of the given year(s).
+By default,
+the program cuts off verbose output near the starts of the years -500 and 2500.
+.El
+.Sh LIMITATIONS
+The
+.Fl v
+option may not be used on systems with floating-point time_t values
+that are neither float nor double.
+.Pp
+Time discontinuities are found by sampling the results returned by localtime
+at twelve-hour intervals.
+This works in all real-world cases;
+one can construct artificial time zones for which this fails.
+.Sh "SEE ALSO"
+.Xr ctime 3 ,
+.Xr tzfile 5 ,
+.Xr zic 8
diff --git a/contrib/tzcode/zic/zdump.c b/contrib/tzcode/zic/zdump.c
new file mode 100644
index 000000000000..0f61125c7d67
--- /dev/null
+++ b/contrib/tzcode/zic/zdump.c
@@ -0,0 +1,675 @@
+/*
+** This file is in the public domain, so clarified as of
+** 2009-05-17 by Arthur David Olson.
+*/
+
+#ifndef lint
+static const char rcsid[] =
+  "$FreeBSD$";
+static char	elsieid[] = "@(#)zdump.c	8.10";
+#endif /* not lint */
+
+/*
+** This code has been made independent of the rest of the time
+** conversion package to increase confidence in the verification it provides.
+** You can use this code to help in verifying other implementations.
+*/
+
+#include <err.h>
+#include <stdio.h>	/* for stdout, stderr */
+#include <stdlib.h>	/* for exit, malloc, atoi */
+#include <string.h>	/* for strcpy */
+#include <sys/types.h>	/* for time_t */
+#include <time.h>	/* for struct tm */
+#include <unistd.h>
+#include <float.h>	/* for FLT_MAX and DBL_MAX */
+#include <ctype.h>	/* for isalpha et al. */
+#ifndef isascii
+#define isascii(x) 1
+#endif /* !defined isascii */
+
+#ifndef ZDUMP_LO_YEAR
+#define ZDUMP_LO_YEAR	(-500)
+#endif /* !defined ZDUMP_LO_YEAR */
+
+#ifndef ZDUMP_HI_YEAR
+#define ZDUMP_HI_YEAR	2500
+#endif /* !defined ZDUMP_HI_YEAR */
+
+#ifndef MAX_STRING_LENGTH
+#define MAX_STRING_LENGTH	1024
+#endif /* !defined MAX_STRING_LENGTH */
+
+#ifndef TRUE
+#define TRUE		1
+#endif /* !defined TRUE */
+
+#ifndef FALSE
+#define FALSE		0
+#endif /* !defined FALSE */
+
+#ifndef EXIT_SUCCESS
+#define EXIT_SUCCESS	0
+#endif /* !defined EXIT_SUCCESS */
+
+#ifndef EXIT_FAILURE
+#define EXIT_FAILURE	1
+#endif /* !defined EXIT_FAILURE */
+
+#ifndef SECSPERMIN
+#define SECSPERMIN	60
+#endif /* !defined SECSPERMIN */
+
+#ifndef MINSPERHOUR
+#define MINSPERHOUR	60
+#endif /* !defined MINSPERHOUR */
+
+#ifndef SECSPERHOUR
+#define SECSPERHOUR	(SECSPERMIN * MINSPERHOUR)
+#endif /* !defined SECSPERHOUR */
+
+#ifndef HOURSPERDAY
+#define HOURSPERDAY	24
+#endif /* !defined HOURSPERDAY */
+
+#ifndef EPOCH_YEAR
+#define EPOCH_YEAR	1970
+#endif /* !defined EPOCH_YEAR */
+
+#ifndef TM_YEAR_BASE
+#define TM_YEAR_BASE	1900
+#endif /* !defined TM_YEAR_BASE */
+
+#ifndef DAYSPERNYEAR
+#define DAYSPERNYEAR	365
+#endif /* !defined DAYSPERNYEAR */
+
+#ifndef isleap
+#define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))
+#endif /* !defined isleap */
+
+#ifndef isleap_sum
+/*
+** See tzfile.h for details on isleap_sum.
+*/
+#define isleap_sum(a, b)	isleap((a) % 400 + (b) % 400)
+#endif /* !defined isleap_sum */
+
+#define SECSPERDAY	((long) SECSPERHOUR * HOURSPERDAY)
+#define SECSPERNYEAR	(SECSPERDAY * DAYSPERNYEAR)
+#define SECSPERLYEAR	(SECSPERNYEAR + SECSPERDAY)
+
+#ifndef HAVE_GETTEXT
+#define HAVE_GETTEXT 0
+#endif
+#if HAVE_GETTEXT
+#include "locale.h"	/* for setlocale */
+#include "libintl.h"
+#endif /* HAVE_GETTEXT */
+
+#ifndef GNUC_or_lint
+#ifdef lint
+#define GNUC_or_lint
+#else /* !defined lint */
+#ifdef __GNUC__
+#define GNUC_or_lint
+#endif /* defined __GNUC__ */
+#endif /* !defined lint */
+#endif /* !defined GNUC_or_lint */
+
+#ifndef INITIALIZE
+#ifdef GNUC_or_lint
+#define INITIALIZE(x)	((x) = 0)
+#else /* !defined GNUC_or_lint */
+#define INITIALIZE(x)
+#endif /* !defined GNUC_or_lint */
+#endif /* !defined INITIALIZE */
+
+/*
+** For the benefit of GNU folk...
+** `_(MSGID)' uses the current locale's message library string for MSGID.
+** The default is to use gettext if available, and use MSGID otherwise.
+*/
+
+#ifndef _
+#if HAVE_GETTEXT
+#define _(msgid) gettext(msgid)
+#else /* !(HAVE_GETTEXT) */
+#define _(msgid) msgid
+#endif /* !(HAVE_GETTEXT) */
+#endif /* !defined _ */
+
+#ifndef TZ_DOMAIN
+#define TZ_DOMAIN "tz"
+#endif /* !defined TZ_DOMAIN */
+
+extern char **	environ;
+extern char *	tzname[2];
+
+static time_t	absolute_min_time;
+static time_t	absolute_max_time;
+static size_t	longest;
+static char *	progname;
+static int	warned;
+
+static void	usage(FILE *stream, int status);
+static char *	abbr(struct tm * tmp);
+static void	abbrok(const char * abbrp, const char * zone);
+static long	delta(struct tm * newp, struct tm * oldp);
+static void	dumptime(const struct tm * tmp);
+static time_t	hunt(char * name, time_t lot, time_t	hit);
+static void	setabsolutes(void);
+static void	show(char * zone, time_t t, int v);
+static const char *	tformat(void);
+static time_t	yeartot(long y);
+
+#ifndef TYPECHECK
+#define my_localtime	localtime
+#else /* !defined TYPECHECK */
+static struct tm *
+my_localtime(tp)
+time_t *	tp;
+{
+	register struct tm *	tmp;
+
+	tmp = localtime(tp);
+	if (tp != NULL && tmp != NULL) {
+		struct tm	tm;
+		register time_t	t;
+
+		tm = *tmp;
+		t = mktime(&tm);
+		if (t - *tp >= 1 || *tp - t >= 1) {
+			(void) fflush(stdout);
+			(void) fprintf(stderr, "\n%s: ", progname);
+			(void) fprintf(stderr, tformat(), *tp);
+			(void) fprintf(stderr, " ->");
+			(void) fprintf(stderr, " year=%d", tmp->tm_year);
+			(void) fprintf(stderr, " mon=%d", tmp->tm_mon);
+			(void) fprintf(stderr, " mday=%d", tmp->tm_mday);
+			(void) fprintf(stderr, " hour=%d", tmp->tm_hour);
+			(void) fprintf(stderr, " min=%d", tmp->tm_min);
+			(void) fprintf(stderr, " sec=%d", tmp->tm_sec);
+			(void) fprintf(stderr, " isdst=%d", tmp->tm_isdst);
+			(void) fprintf(stderr, " -> ");
+			(void) fprintf(stderr, tformat(), t);
+			(void) fprintf(stderr, "\n");
+		}
+	}
+	return tmp;
+}
+#endif /* !defined TYPECHECK */
+
+static void
+abbrok(abbrp, zone)
+const char * const	abbrp;
+const char * const	zone;
+{
+	register const char *	cp;
+	register char *		wp;
+
+	if (warned)
+		return;
+	cp = abbrp;
+	wp = NULL;
+	while (isascii((unsigned char) *cp) && isalpha((unsigned char) *cp))
+		++cp;
+	if (cp - abbrp == 0)
+		wp = _("lacks alphabetic at start");
+	else if (cp - abbrp < 3)
+		wp = _("has fewer than 3 alphabetics");
+	else if (cp - abbrp > 6)
+		wp = _("has more than 6 alphabetics");
+	if (wp == NULL && (*cp == '+' || *cp == '-')) {
+		++cp;
+		if (isascii((unsigned char) *cp) &&
+			isdigit((unsigned char) *cp))
+				if (*cp++ == '1' && *cp >= '0' && *cp <= '4')
+					++cp;
+		if (*cp != '\0')
+			wp = _("differs from POSIX standard");
+	}
+	if (wp == NULL)
+		return;
+	(void) fflush(stdout);
+	(void) fprintf(stderr,
+		_("%s: warning: zone \"%s\" abbreviation \"%s\" %s\n"),
+		progname, zone, abbrp, wp);
+	warned = TRUE;
+}
+
+int
+main(argc, argv)
+int	argc;
+char *	argv[];
+{
+	register int		i;
+	register int		c;
+	register int		vflag;
+	register char *		cutarg;
+	register long		cutloyear = ZDUMP_LO_YEAR;
+	register long		cuthiyear = ZDUMP_HI_YEAR;
+	register time_t		cutlotime;
+	register time_t		cuthitime;
+	register char **	fakeenv;
+	time_t			now;
+	time_t			t;
+	time_t			newt;
+	struct tm		tm;
+	struct tm		newtm;
+	register struct tm *	tmp;
+	register struct tm *	newtmp;
+
+	INITIALIZE(cutlotime);
+	INITIALIZE(cuthitime);
+#if HAVE_GETTEXT
+	(void) setlocale(LC_MESSAGES, "");
+#ifdef TZ_DOMAINDIR
+	(void) bindtextdomain(TZ_DOMAIN, TZ_DOMAINDIR);
+#endif /* TEXTDOMAINDIR */
+	(void) textdomain(TZ_DOMAIN);
+#endif /* HAVE_GETTEXT */
+	for (i = 1; i < argc; ++i)
+		if (strcmp(argv[i], "--version") == 0) {
+			errx(EXIT_SUCCESS, "%s", elsieid);
+		} else if (strcmp(argv[i], "--help") == 0) {
+			usage(stdout, EXIT_SUCCESS);
+		}
+	vflag = 0;
+	cutarg = NULL;
+	while ((c = getopt(argc, argv, "c:v")) == 'c' || c == 'v')
+		if (c == 'v')
+			vflag = 1;
+		else	cutarg = optarg;
+	if ((c != -1) ||
+		(optind == argc - 1 && strcmp(argv[optind], "=") == 0)) {
+			usage(stderr, EXIT_FAILURE);
+	}
+	if (vflag) {
+		if (cutarg != NULL) {
+			long	lo;
+			long	hi;
+			char	dummy;
+
+			if (sscanf(cutarg, "%ld%c", &hi, &dummy) == 1) {
+				cuthiyear = hi;
+			} else if (sscanf(cutarg, "%ld,%ld%c",
+				&lo, &hi, &dummy) == 2) {
+					cutloyear = lo;
+					cuthiyear = hi;
+			} else {
+(void) fprintf(stderr, _("%s: wild -c argument %s\n"),
+					progname, cutarg);
+				exit(EXIT_FAILURE);
+			}
+		}
+		setabsolutes();
+		cutlotime = yeartot(cutloyear);
+		cuthitime = yeartot(cuthiyear);
+	}
+	(void) time(&now);
+	longest = 0;
+	for (i = optind; i < argc; ++i)
+		if (strlen(argv[i]) > longest)
+			longest = strlen(argv[i]);
+	{
+		register int	from;
+		register int	to;
+
+		for (i = 0;  environ[i] != NULL; ++i)
+			continue;
+		fakeenv = (char **) malloc((size_t) ((i + 2) *
+			sizeof *fakeenv));
+		if (fakeenv == NULL ||
+			(fakeenv[0] = (char *) malloc((size_t) (longest +
+				4))) == NULL)
+					errx(EXIT_FAILURE,
+					     _("malloc() failed"));
+		to = 0;
+		(void) strcpy(fakeenv[to++], "TZ=");
+		for (from = 0; environ[from] != NULL; ++from)
+			if (strncmp(environ[from], "TZ=", 3) != 0)
+				fakeenv[to++] = environ[from];
+		fakeenv[to] = NULL;
+		environ = fakeenv;
+	}
+	for (i = optind; i < argc; ++i) {
+		static char	buf[MAX_STRING_LENGTH];
+
+		(void) strcpy(&fakeenv[0][3], argv[i]);
+		if (!vflag) {
+			show(argv[i], now, FALSE);
+			continue;
+		}
+		warned = FALSE;
+		t = absolute_min_time;
+		show(argv[i], t, TRUE);
+		t += SECSPERHOUR * HOURSPERDAY;
+		show(argv[i], t, TRUE);
+		if (t < cutlotime)
+			t = cutlotime;
+		tmp = my_localtime(&t);
+		if (tmp != NULL) {
+			tm = *tmp;
+			(void) strncpy(buf, abbr(&tm), (sizeof buf) - 1);
+		}
+		for ( ; ; ) {
+			if (t >= cuthitime || t >= cuthitime - SECSPERHOUR * 12)
+				break;
+			newt = t + SECSPERHOUR * 12;
+			newtmp = localtime(&newt);
+			if (newtmp != NULL)
+				newtm = *newtmp;
+			if ((tmp == NULL || newtmp == NULL) ? (tmp != newtmp) :
+				(delta(&newtm, &tm) != (newt - t) ||
+				newtm.tm_isdst != tm.tm_isdst ||
+				strcmp(abbr(&newtm), buf) != 0)) {
+					newt = hunt(argv[i], t, newt);
+					newtmp = localtime(&newt);
+					if (newtmp != NULL) {
+						newtm = *newtmp;
+						(void) strncpy(buf,
+							abbr(&newtm),
+							(sizeof buf) - 1);
+					}
+			}
+			t = newt;
+			tm = newtm;
+			tmp = newtmp;
+		}
+		t = absolute_max_time;
+		t -= SECSPERHOUR * HOURSPERDAY;
+		show(argv[i], t, TRUE);
+		t += SECSPERHOUR * HOURSPERDAY;
+		show(argv[i], t, TRUE);
+	}
+	if (fflush(stdout) || ferror(stdout))
+		errx(EXIT_FAILURE, _("error writing standard output"));
+	exit(EXIT_SUCCESS);
+	/* If exit fails to exit... */
+	return(EXIT_FAILURE);
+}
+
+static void
+setabsolutes(void)
+{
+	if (0.5 == (time_t) 0.5) {
+		/*
+		** time_t is floating.
+		*/
+		if (sizeof (time_t) == sizeof (float)) {
+			absolute_min_time = (time_t) -FLT_MAX;
+			absolute_max_time = (time_t) FLT_MAX;
+		} else if (sizeof (time_t) == sizeof (double)) {
+			absolute_min_time = (time_t) -DBL_MAX;
+			absolute_max_time = (time_t) DBL_MAX;
+		} else {
+			(void) fprintf(stderr,
+_("%s: use of -v on system with floating time_t other than float or double\n"),
+				progname);
+			exit(EXIT_FAILURE);
+		}
+	} else if (0 > (time_t) -1) {
+		/*
+		** time_t is signed.  Assume overflow wraps around.
+		*/
+		time_t t = 0;
+		time_t t1 = 1;
+
+		while (t < t1) {
+			t = t1;
+			t1 = 2 * t1 + 1;
+		}
+
+		absolute_max_time = t;
+		t = -t;
+		absolute_min_time = t - 1;
+		if (t < absolute_min_time)
+			absolute_min_time = t;
+	} else {
+		/*
+		** time_t is unsigned.
+		*/
+		absolute_min_time = 0;
+		absolute_max_time = absolute_min_time - 1;
+	}
+}
+
+static time_t
+yeartot(y)
+const long	y;
+{
+	register long	myy;
+	register long	seconds;
+	register time_t	t;
+
+	myy = EPOCH_YEAR;
+	t = 0;
+	while (myy != y) {
+		if (myy < y) {
+			seconds = isleap(myy) ? SECSPERLYEAR : SECSPERNYEAR;
+			++myy;
+			if (t > absolute_max_time - seconds) {
+				t = absolute_max_time;
+				break;
+			}
+			t += seconds;
+		} else {
+			--myy;
+			seconds = isleap(myy) ? SECSPERLYEAR : SECSPERNYEAR;
+			if (t < absolute_min_time + seconds) {
+				t = absolute_min_time;
+				break;
+			}
+			t -= seconds;
+		}
+	}
+	return t;
+}
+
+static void
+usage(FILE *stream, int status)
+{
+	fprintf(stream,
+_("usage: %s [--version] [-v] [--help] [-c [loyear,]hiyear] zonename ...\n\
+\n\
+Report bugs to tz@elsie.nci.nih.gov.\n"), progname);
+	exit(status);
+}
+
+static time_t
+hunt(char *name, time_t lot, time_t hit)
+{
+	time_t			t;
+	long			diff;
+	struct tm		lotm;
+	register struct tm *	lotmp;
+	struct tm		tm;
+	register struct tm *	tmp;
+	char			loab[MAX_STRING_LENGTH];
+
+	lotmp = my_localtime(&lot);
+	if (lotmp != NULL) {
+		lotm = *lotmp;
+		(void) strncpy(loab, abbr(&lotm), (sizeof loab) - 1);
+	}
+	for ( ; ; ) {
+		diff = (long) (hit - lot);
+		if (diff < 2)
+			break;
+		t = lot;
+		t += diff / 2;
+		if (t <= lot)
+			++t;
+		else if (t >= hit)
+			--t;
+		tmp = my_localtime(&t);
+		if (tmp != NULL)
+			tm = *tmp;
+		if ((lotmp == NULL || tmp == NULL) ? (lotmp == tmp) :
+			(delta(&tm, &lotm) == (t - lot) &&
+			tm.tm_isdst == lotm.tm_isdst &&
+			strcmp(abbr(&tm), loab) == 0)) {
+				lot = t;
+				lotm = tm;
+				lotmp = tmp;
+		} else	hit = t;
+	}
+	show(name, lot, TRUE);
+	show(name, hit, TRUE);
+	return hit;
+}
+
+/*
+** Thanks to Paul Eggert for logic used in delta.
+*/
+
+static long
+delta(newp, oldp)
+struct tm *	newp;
+struct tm *	oldp;
+{
+	register long	result;
+	register int	tmy;
+
+	if (newp->tm_year < oldp->tm_year)
+		return -delta(oldp, newp);
+	result = 0;
+	for (tmy = oldp->tm_year; tmy < newp->tm_year; ++tmy)
+		result += DAYSPERNYEAR + isleap_sum(tmy, TM_YEAR_BASE);
+	result += newp->tm_yday - oldp->tm_yday;
+	result *= HOURSPERDAY;
+	result += newp->tm_hour - oldp->tm_hour;
+	result *= MINSPERHOUR;
+	result += newp->tm_min - oldp->tm_min;
+	result *= SECSPERMIN;
+	result += newp->tm_sec - oldp->tm_sec;
+	return result;
+}
+
+static void
+show(char *zone, time_t t, int v)
+{
+	register struct tm *	tmp;
+
+	(void) printf("%-*s  ", (int) longest, zone);
+	if (v) {
+		tmp = gmtime(&t);
+		if (tmp == NULL) {
+			(void) printf(tformat(), t);
+		} else {
+			dumptime(tmp);
+			(void) printf(" UTC");
+		}
+		(void) printf(" = ");
+	}
+	tmp = my_localtime(&t);
+	dumptime(tmp);
+	if (tmp != NULL) {
+		if (*abbr(tmp) != '\0')
+			(void) printf(" %s", abbr(tmp));
+		if (v) {
+			(void) printf(" isdst=%d", tmp->tm_isdst);
+#ifdef TM_GMTOFF
+			(void) printf(" gmtoff=%ld", tmp->TM_GMTOFF);
+#endif /* defined TM_GMTOFF */
+		}
+	}
+	(void) printf("\n");
+	if (tmp != NULL && *abbr(tmp) != '\0')
+		abbrok(abbr(tmp), zone);
+}
+
+static char *
+abbr(tmp)
+struct tm *	tmp;
+{
+	register char *	result;
+	static char	nada;
+
+	if (tmp->tm_isdst != 0 && tmp->tm_isdst != 1)
+		return &nada;
+	result = tzname[tmp->tm_isdst];
+	return (result == NULL) ? &nada : result;
+}
+
+/*
+** The code below can fail on certain theoretical systems;
+** it works on all known real-world systems as of 2004-12-30.
+*/
+
+static const char *
+tformat(void)
+{
+	if (0.5 == (time_t) 0.5) {	/* floating */
+		if (sizeof (time_t) > sizeof (double))
+			return "%Lg";
+		return "%g";
+	}
+	if (0 > (time_t) -1) {		/* signed */
+		if (sizeof (time_t) > sizeof (long))
+			return "%lld";
+		if (sizeof (time_t) > sizeof (int))
+			return "%ld";
+		return "%d";
+	}
+	if (sizeof (time_t) > sizeof (unsigned long))
+		return "%llu";
+	if (sizeof (time_t) > sizeof (unsigned int))
+		return "%lu";
+	return "%u";
+}
+
+static void
+dumptime(timeptr)
+register const struct tm *	timeptr;
+{
+	static const char	wday_name[][3] = {
+		"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
+	};
+	static const char	mon_name[][3] = {
+		"Jan", "Feb", "Mar", "Apr", "May", "Jun",
+		"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
+	};
+	register const char *	wn;
+	register const char *	mn;
+	register int		lead;
+	register int		trail;
+
+	if (timeptr == NULL) {
+		(void) printf("NULL");
+		return;
+	}
+	/*
+	** The packaged versions of localtime and gmtime never put out-of-range
+	** values in tm_wday or tm_mon, but since this code might be compiled
+	** with other (perhaps experimental) versions, paranoia is in order.
+	*/
+	if (timeptr->tm_wday < 0 || timeptr->tm_wday >=
+		(int) (sizeof wday_name / sizeof wday_name[0]))
+			wn = "???";
+	else		wn = wday_name[timeptr->tm_wday];
+	if (timeptr->tm_mon < 0 || timeptr->tm_mon >=
+		(int) (sizeof mon_name / sizeof mon_name[0]))
+			mn = "???";
+	else		mn = mon_name[timeptr->tm_mon];
+	(void) printf("%.3s %.3s%3d %.2d:%.2d:%.2d ",
+		wn, mn,
+		timeptr->tm_mday, timeptr->tm_hour,
+		timeptr->tm_min, timeptr->tm_sec);
+#define DIVISOR	10
+	trail = timeptr->tm_year % DIVISOR + TM_YEAR_BASE % DIVISOR;
+	lead = timeptr->tm_year / DIVISOR + TM_YEAR_BASE / DIVISOR +
+		trail / DIVISOR;
+	trail %= DIVISOR;
+	if (trail < 0 && lead > 0) {
+		trail += DIVISOR;
+		--lead;
+	} else if (lead < 0 && trail > 0) {
+		trail -= DIVISOR;
+		++lead;
+	}
+	if (lead == 0)
+		(void) printf("%d", trail);
+	else	(void) printf("%d%d", lead, ((trail < 0) ? -trail : trail));
+}
diff --git a/contrib/tzcode/zic/zdump/Makefile b/contrib/tzcode/zic/zdump/Makefile
new file mode 100644
index 000000000000..7ee8db324927
--- /dev/null
+++ b/contrib/tzcode/zic/zdump/Makefile
@@ -0,0 +1,15 @@
+# $FreeBSD$
+
+.PATH: ${.CURDIR}/..
+
+PROG=	zdump
+MAN=	zdump.8
+SRCS=	zdump.c ialloc.c scheck.c
+
+CFLAGS+= -DTM_GMTOFF=tm_gmtoff -DTM_ZONE=tm_zone -DSTD_INSPIRED -DPCTS
+CFLAGS+= -DHAVE_LONG_DOUBLE -DTZDIR=\"/usr/share/zoneinfo\" -Demkdir=mkdir
+CFLAGS+= -I${.CURDIR}/.. -I${.CURDIR}/../../../lib/libc/stdtime
+
+WARNS?=	2
+
+.include <bsd.prog.mk>
diff --git a/contrib/tzcode/zic/zic.8 b/contrib/tzcode/zic/zic.8
new file mode 100644
index 000000000000..f7ff815b080a
--- /dev/null
+++ b/contrib/tzcode/zic/zic.8
@@ -0,0 +1,465 @@
+.\" $FreeBSD$
+.Dd June 20, 2004
+.Dt ZIC 8
+.Os
+.Sh NAME
+.Nm zic
+.Nd timezone compiler
+.Sh SYNOPSIS
+.Nm
+.Op Fl -version
+.Op Fl Dsv
+.Op Fl d Ar directory
+.Op Fl g Ar group
+.Op Fl L Ar leapsecondfilename
+.Op Fl l Ar localtime
+.Op Fl m Ar mode
+.Op Fl p Ar posixrules
+.Op Fl u Ar user
+.Op Fl y Ar command
+.Op Ar filename ...
+.Sh DESCRIPTION
+The
+.Nm
+utility reads text from the file(s) named on the command line
+and creates the time conversion information files specified in this input.
+If a
+.Ar filename
+is
+.Em - ,
+the standard input is read.
+.Pp
+The following options are available:
+.Bl -tag -width indent
+.It Fl -version
+Output version information and exit.
+.It Fl D
+Do not automatically create directories.
+If the input file(s) specify
+an output file in a directory which does not already exist, the
+default behavior is to attempt to create the directory.
+If
+.Fl D
+is specified,
+.Nm
+will instead error out immediately.
+.It Fl d Ar directory
+Create time conversion information files in the named directory rather than
+in the standard directory named below.
+.It Fl g Ar group
+After creating each output file, change its group ownership to the
+specified
+.Ar group
+(which can be either a name or a numeric group ID).
+.It Fl L Ar leapsecondfilename
+Read leap second information from the file with the given name.
+If this option is not used,
+no leap second information appears in output files.
+.It Fl l Ar timezone
+Use the given
+.Ar time zone
+as local time.
+The
+.Nm
+utility will act as if the input contained a link line of the form
+.Pp
+.D1 No "Link	timezone		localtime"
+.Pp
+(Note that this action has no effect on
+.Fx ,
+since the local time zone is specified in
+.Pa /etc/localtime
+and not
+.Pa /usr/share/zoneinfo/localtime . )
+.It Fl m Ar mode
+After creating each output file, change its access mode to
+.Ar mode .
+Both numeric and alphabetic modes are accepted
+(see
+.Xr chmod 1 ) .
+.It Fl p Ar timezone
+Use the given
+.Ar "time zone" Ns 's
+rules when handling POSIX-format
+time zone environment variables.
+The
+.Nm
+utility will act as if the input contained a link line of the form
+.Pp
+.D1 No "Link	timezone		posixrules"
+.It Fl u Ar user
+After creating each output file, change its owner to
+.Ar user
+(which can be either a name or a numeric user ID).
+.It Fl v
+Complain if a year that appears in a data file is outside the range
+of years representable by
+.Xr time 3
+values.
+.It Fl s
+Limit time values stored in output files to values that are the same
+whether they are taken to be signed or unsigned.
+You can use this option to generate SVVS-compatible files.
+.It Fl y Ar command
+Use the given
+.Ar command
+rather than
+.Em yearistype
+when checking year types (see below).
+.El
+.Pp
+Input lines are made up of fields.
+Fields are separated from one another by any number of white space characters.
+Leading and trailing white space on input lines is ignored.
+An unquoted sharp character (#) in the input introduces a comment which extends
+to the end of the line the sharp character appears on.
+White space characters and sharp characters may be enclosed in double quotes
+(") if they are to be used as part of a field.
+Any line that is blank (after comment stripping) is ignored.
+Non-blank lines are expected to be of one of three types:
+rule lines, zone lines, and link lines.
+.Pp
+A rule line has the form:
+.Dl "Rule	NAME	FROM	TO	TYPE	IN	ON		AT	SAVE	LETTER/S
+For example:
+.Dl "Rule	US	1967	1973	\-	Apr	lastSun	2:00	1:00	D
+.Pp
+The fields that make up a rule line are:
+.Bl -tag -width "LETTER/S" -offset indent
+.It NAME
+Give the (arbitrary) name of the set of rules this rule is part of.
+.It FROM
+Give the first year in which the rule applies.
+Any integer year can be supplied; the Gregorian calendar is assumed.
+The word
+.Em minimum
+(or an abbreviation) means the minimum year representable as an integer.
+The word
+.Em maximum
+(or an abbreviation) means the maximum year representable as an integer.
+Rules can describe times that are not representable as time values,
+with the unrepresentable times ignored; this allows rules to be portable
+among hosts with differing time value types.
+.It TO
+Give the final year in which the rule applies.
+In addition to
+.Em minimum
+and
+.Em maximum
+(as above),
+the word
+.Em only
+(or an abbreviation)
+may be used to repeat the value of the
+.Em FROM
+field.
+.It TYPE
+Give the type of year in which the rule applies.
+If
+.Em TYPE
+is
+.Em \-
+then the rule applies in all years between
+.Em FROM
+and
+.Em TO
+inclusive.
+If
+.Em TYPE
+is something else, then
+.Nm
+executes the command
+.Li yearistype Ar year Ar type
+to check the type of a year:
+an exit status of zero is taken to mean that the year is of the given type;
+an exit status of one is taken to mean that the year is not of the given type.
+.It IN
+Name the month in which the rule takes effect.
+Month names may be abbreviated.
+.It ON
+Give the day on which the rule takes effect.
+Recognized forms include:
+.Pp
+.Bl -tag -width lastSun -compact -offset indent
+.It \&5
+the fifth of the month
+.It lastSun
+the last Sunday in the month
+.It lastMon
+the last Monday in the month
+.It Sun>=8
+first Sunday on or after the eighth
+.It Sun<=25
+last Sunday on or before the 25th
+.El
+.Pp
+Names of days of the week may be abbreviated or spelled out in full.
+Note that there must be no spaces within the
+.Em ON
+field.
+.It AT
+Give the time of day at which the rule takes effect.
+Recognized forms include:
+.Pp
+.Bl -tag -width "\&1:28:14" -offset indent -compact
+.It 2
+time in hours
+.It 2:00
+time in hours and minutes
+.It 15:00
+24-hour format time (for times after noon)
+.It 1:28:14
+time in hours, minutes, and seconds
+.El
+.Pp
+where hour 0 is midnight at the start of the day,
+and hour 24 is midnight at the end of the day.
+Any of these forms may be followed by the letter
+.Sq Li w
+if the given time is local
+.Dq "wall clock"
+time,
+.Sq Li s
+if the given time is local
+.Dq standard
+time, or
+.Sq Li u
+(or
+.Sq Li g
+or
+.Sq Li z )
+if the given time is universal time;
+in the absence of an indicator,
+wall clock time is assumed.
+.It SAVE
+Give the amount of time to be added to local standard time when the rule is in
+effect.
+This field has the same format as the
+.Em AT
+field
+(although, of course, the
+.Sq Li w
+and
+.Sq Li s
+suffixes are not used).
+.It LETTER/S
+Give the
+.Dq "variable part"
+(for example, the
+.Dq S
+or
+.Dq D
+in
+.Dq EST
+or
+.Dq EDT )
+of time zone abbreviations to be used when this rule is in effect.
+If this field is
+.Em \- ,
+the variable part is null.
+.El
+.Pp
+A zone line has the form:
+.Dl "Zone	NAME	GMTOFF	RULES/SAVE	FORMAT	[UNTILYEAR [MONTH [DAY [TIME]]]]"
+For example:
+.Dl "Zone	Australia/Adelaide	9:30	Aus	CST	1971 Oct 31 2:00
+The fields that make up a zone line are:
+.Bl -tag -width indent
+.It NAME
+The name of the time zone.
+This is the name used in creating the time conversion information file for the
+zone.
+.It GMTOFF
+The amount of time to add to UTC to get standard time in this zone.
+This field has the same format as the
+.Em AT
+and
+.Em SAVE
+fields of rule lines;
+begin the field with a minus sign if time must be subtracted from UTC.
+.It RULES/SAVE
+The name of the rule(s) that apply in the time zone or,
+alternately, an amount of time to add to local standard time.
+If this field is
+.Em \-
+then standard time always applies in the time zone.
+.It FORMAT
+The format for time zone abbreviations in this time zone.
+The pair of characters
+.Em %s
+is used to show where the
+.Dq "variable part"
+of the time zone abbreviation goes.
+Alternately,
+a slash (/)
+separates standard and daylight abbreviations.
+.It UNTILYEAR [MONTH [DAY [TIME]]]
+The time at which the UTC offset or the rule(s) change for a location.
+It is specified as a year, a month, a day, and a time of day.
+If this is specified,
+the time zone information is generated from the given UTC offset
+and rule change until the time specified.
+The month, day, and time of day have the same format as the IN, ON, and AT
+fields of a rule; trailing fields can be omitted, and default to the
+earliest possible value for the missing fields.
+.Pp
+The next line must be a
+.Dq continuation
+line; this has the same form as a zone line except that the
+string
+.Dq Zone
+and the name are omitted, as the continuation line will
+place information starting at the time specified as the
+.Em until
+information in the previous line in the file used by the previous line.
+Continuation lines may contain
+.Em until
+information, just as zone lines do, indicating that the next line is a further
+continuation.
+.El
+.Pp
+A link line has the form
+.Dl "Link	LINK-FROM	LINK-TO
+For example:
+.Dl "Link	Europe/Istanbul	Asia/Istanbul
+The
+.Em LINK-FROM
+field should appear as the
+.Em NAME
+field in some zone line;
+the
+.Em LINK-TO
+field is used as an alternate name for that zone.
+.Pp
+Except for continuation lines,
+lines may appear in any order in the input.
+.Pp
+Lines in the file that describes leap seconds have the following form:
+.Dl "Leap	YEAR	MONTH	DAY	HH:MM:SS	CORR	R/S
+For example:
+.Dl "Leap	1974	Dec	31	23:59:60	+	S
+The
+.Em YEAR ,
+.Em MONTH ,
+.Em DAY ,
+and
+.Em HH:MM:SS
+fields tell when the leap second happened.
+The
+.Em CORR
+field
+should be
+.Dq +
+if a second was added
+or
+.Dq -
+if a second was skipped.
+.\" There's no need to document the following, since it's impossible for more
+.\" than one leap second to be inserted or deleted at a time.
+.\" The C Standard is in error in suggesting the possibility.
+.\" See Terry J Quinn, The BIPM and the accurate measure of time,
+.\" Proc IEEE 79, 7 (July 1991), 894-905.
+.\"	or
+.\"	.q ++
+.\"	if two seconds were added
+.\"	or
+.\"	.q --
+.\"	if two seconds were skipped.
+The
+.Em R/S
+field
+should be (an abbreviation of)
+.Dq Stationary
+if the leap second time given by the other fields should be interpreted as UTC
+or
+(an abbreviation of)
+.Dq Rolling
+if the leap second time given by the other fields should be interpreted as
+local wall clock time.
+.Sh "EXTENDED EXAMPLE"
+Here is an extended example of
+.Nm
+input, intended to illustrate many of its features.
+.br
+.ne 22
+.nf
+.in +2m
+.ta \w'# Rule\0\0'u +\w'NAME\0\0'u +\w'FROM\0\0'u +\w'1973\0\0'u +\w'TYPE\0\0'u +\w'Apr\0\0'u +\w'lastSun\0\0'u +\w'2:00\0\0'u +\w'SAVE\0\0'u
+.sp
+# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
+Rule	Swiss	1940	only	-	Nov	2	0:00	1:00	S
+Rule	Swiss	1940	only	-	Dec	31	0:00	0	-
+Rule	Swiss	1941	1942	-	May	Sun>=1	2:00	1:00	S
+Rule	Swiss	1941	1942	-	Oct	Sun>=1	0:00	0
+.sp .5
+Rule	EU	1977	1980	-	Apr	Sun>=1	1:00u	1:00	S
+Rule	EU	1977	only	-	Sep	lastSun	1:00u	0	-
+Rule	EU	1978	only	-	Oct	 1	1:00u	0	-
+Rule	EU	1979	1995	-	Sep	lastSun	1:00u	0	-
+Rule	EU	1981	max	-	Mar	lastSun	1:00u	1:00	S
+Rule	EU	1996	max	-	Oct	lastSun	1:00u	0	-
+.sp
+.ta \w'# Zone\0\0'u +\w'Europe/Zurich\0\0'u +\w'0:34:08\0\0'u +\w'RULES/SAVE\0\0'u +\w'FORMAT\0\0'u
+# Zone	NAME	GMTOFF	RULES	FORMAT	UNTIL
+Zone	Europe/Zurich	0:34:08	-	LMT	1848 Sep 12
+		0:29:44	-	BMT	1894 Jun
+		1:00	Swiss	CE%sT	1981
+		1:00	EU	CE%sT
+.sp
+Link	Europe/Zurich	Switzerland
+.sp
+.in
+.fi
+In this example, the zone is named Europe/Zurich but it has an alias
+as Switzerland.
+Zurich was 34 minutes and 8 seconds west of GMT until 1848-09-12
+at 00:00, when the offset changed to 29 minutes and 44 seconds.
+After 1894-06-01 at 00:00 Swiss daylight saving rules (defined with
+lines beginning with "Rule Swiss") apply, and the GMT offset became
+one hour.
+From 1981 to the present, EU daylight saving rules have applied,
+and the UTC offset has remained at one hour.
+.Pp
+In 1940, daylight saving time applied from November 2 at 00:00 to
+December 31 at 00:00.
+In 1941 and 1942, daylight saving time applied from the first Sunday
+in May at 02:00 to the first Sunday in October at 00:00.
+The pre-1981 EU daylight-saving rules have no effect here, but are
+included for completeness.
+Since 1981, daylight saving has begun on the last Sunday in March
+at 01:00 UTC.
+Until 1995 it ended the last Sunday in September at 01:00 UTC, but
+this changed to the last Sunday in October starting in 1996.
+.Pp
+For purposes of display, "LMT" and "BMT" were initially used,
+respectively.
+Since Swiss rules and later EU rules were applied, the display name
+for the timezone has been CET for standard time and CEST for daylight
+saving time.
+.Sh NOTES
+For areas with more than two types of local time,
+you may need to use local standard time in the
+.Em AT
+field of the earliest transition time's rule to ensure that
+the earliest transition time recorded in the compiled file is correct.
+.Pp
+If, for a particular zone, a clock advance caused by the start of
+daylight saving coincides with and is equal to a clock retreat
+caused by a change in UTC offset,
+.Nm
+produces a single transition to daylight saving at the new UTC offset
+(without any change in wall clock time).
+To get separate transitions use multiple zone continuation lines
+specifying transition instants using universal time.
+.Sh FILES
+.Bl -tag -width /usr/share/zoneinfo -compact
+.It /usr/share/zoneinfo
+standard directory used for created files
+.El
+.Sh "SEE ALSO"
+.Xr ctime 3 ,
+.Xr tzfile 5 ,
+.Xr zdump 8
+.\" @(#)zic.8	8.5
+.\" This file is in the public domain, so clarified as of
+.\" 2009-05-17 by Arthur David Olson.
diff --git a/contrib/tzcode/zic/zic.c b/contrib/tzcode/zic/zic.c
new file mode 100644
index 000000000000..7670056fda5d
--- /dev/null
+++ b/contrib/tzcode/zic/zic.c
@@ -0,0 +1,2723 @@
+/*
+** This file is in the public domain, so clarified as of
+** 2006-07-17 by Arthur David Olson.
+*/
+
+static const char	elsieid[] = "@(#)zic.c	8.20";
+
+#ifndef lint
+static const char rcsid[] =
+  "$FreeBSD$";
+#endif /* not lint */
+
+#include "private.h"
+#include "tzfile.h"
+#include <err.h>
+#include <locale.h>
+#include <sys/stat.h>			/* for umask manifest constants */
+#include <sys/types.h>
+#include <unistd.h>
+
+#define	ZIC_VERSION	'2'
+
+typedef int_fast64_t	zic_t;
+
+#ifndef ZIC_MAX_ABBR_LEN_WO_WARN
+#define ZIC_MAX_ABBR_LEN_WO_WARN	6
+#endif /* !defined ZIC_MAX_ABBR_LEN_WO_WARN */
+
+#define MKDIR_UMASK (S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH)
+
+/*
+** On some ancient hosts, predicates like `isspace(C)' are defined
+** only if isascii(C) || C == EOF. Modern hosts obey the C Standard,
+** which says they are defined only if C == ((unsigned char) C) || C == EOF.
+** Neither the C Standard nor POSIX require that `isascii' exist.
+** For portability, we check both ancient and modern requirements.
+** If isascii is not defined, the isascii check succeeds trivially.
+*/
+#include "ctype.h"
+#ifndef isascii
+#define isascii(x) 1
+#endif
+
+#define OFFSET_STRLEN_MAXIMUM	(7 + INT_STRLEN_MAXIMUM(long))
+#define RULE_STRLEN_MAXIMUM	8	/* "Mdd.dd.d" */
+
+#define end(cp)	(strchr((cp), '\0'))
+
+struct rule {
+	const char *	r_filename;
+	int		r_linenum;
+	const char *	r_name;
+
+	int		r_loyear;	/* for example, 1986 */
+	int		r_hiyear;	/* for example, 1986 */
+	const char *	r_yrtype;
+	int		r_lowasnum;
+	int		r_hiwasnum;
+
+	int		r_month;	/* 0..11 */
+
+	int		r_dycode;	/* see below */
+	int		r_dayofmonth;
+	int		r_wday;
+
+	long		r_tod;		/* time from midnight */
+	int		r_todisstd;	/* above is standard time if TRUE */
+					/* or wall clock time if FALSE */
+	int		r_todisgmt;	/* above is GMT if TRUE */
+					/* or local time if FALSE */
+	long		r_stdoff;	/* offset from standard time */
+	const char *	r_abbrvar;	/* variable part of abbreviation */
+
+	int		r_todo;		/* a rule to do (used in outzone) */
+	zic_t		r_temp;		/* used in outzone */
+};
+
+/*
+**	r_dycode		r_dayofmonth	r_wday
+*/
+
+#define DC_DOM		0	/* 1..31 */	/* unused */
+#define DC_DOWGEQ	1	/* 1..31 */	/* 0..6 (Sun..Sat) */
+#define DC_DOWLEQ	2	/* 1..31 */	/* 0..6 (Sun..Sat) */
+
+struct zone {
+	const char *	z_filename;
+	int		z_linenum;
+
+	const char *	z_name;
+	long		z_gmtoff;
+	const char *	z_rule;
+	const char *	z_format;
+
+	long		z_stdoff;
+
+	struct rule *	z_rules;
+	int		z_nrules;
+
+	struct rule	z_untilrule;
+	zic_t		z_untiltime;
+};
+
+static void	addtt(zic_t starttime, int type);
+static int	addtype(long gmtoff, const char * abbr, int isdst,
+				int ttisstd, int ttisgmt);
+static void	leapadd(zic_t t, int positive, int rolling, int count);
+static void	adjleap(void);
+static void	associate(void);
+static int	ciequal(const char * ap, const char * bp);
+static void	convert(long val, char * buf);
+static void	convert64(zic_t val, char * buf);
+static void	dolink(const char * fromfield, const char * tofield);
+static void	doabbr(char * abbr, const char * format,
+			const char * letters, int isdst, int doquotes);
+static void	eat(const char * name, int num);
+static void	eats(const char * name, int num,
+			const char * rname, int rnum);
+static long	eitol(int i);
+static void	error(const char * message);
+static char **	getfields(char * buf);
+static long	gethms(const char * string, const char * errstrng,
+			int signable);
+static void	infile(const char * filename);
+static void	inleap(char ** fields, int nfields);
+static void	inlink(char ** fields, int nfields);
+static void	inrule(char ** fields, int nfields);
+static int	inzcont(char ** fields, int nfields);
+static int	inzone(char ** fields, int nfields);
+static int	inzsub(char ** fields, int nfields, int iscont);
+static int	is32(zic_t x);
+static int	itsabbr(const char * abbr, const char * word);
+static int	itsdir(const char * name);
+static int	lowerit(int c);
+static char *	memcheck(char * tocheck);
+static int	mkdirs(char * filename);
+static void	newabbr(const char * abbr);
+static long	oadd(long t1, long t2);
+static void	outzone(const struct zone * zp, int ntzones);
+static void	puttzcode(long code, FILE * fp);
+static void	puttzcode64(zic_t code, FILE * fp);
+static int	rcomp(const void * leftp, const void * rightp);
+static zic_t	rpytime(const struct rule * rp, int wantedy);
+static void	rulesub(struct rule * rp,
+			const char * loyearp, const char * hiyearp,
+			const char * typep, const char * monthp,
+			const char * dayp, const char * timep);
+static int 	stringoffset(char * result, long offset);
+static int	stringrule(char * result, const struct rule * rp,
+			long dstoff, long gmtoff);
+static void 	stringzone(char * result,
+			const struct zone * zp, int ntzones);
+static void	setboundaries(void);
+static void	setgroup(gid_t *flag, const char *name);
+static void	setuser(uid_t *flag, const char *name);
+static zic_t	tadd(zic_t t1, long t2);
+static void	usage(FILE *stream, int status);
+static void	writezone(const char * name, const char * string);
+static int	yearistype(int year, const char * type);
+
+static int		charcnt;
+static int		errors;
+static const char *	filename;
+static int		leapcnt;
+static int		leapseen;
+static int		leapminyear;
+static int		leapmaxyear;
+static int		linenum;
+static int		max_abbrvar_len;
+static int		max_format_len;
+static zic_t		max_time;
+static int		max_year;
+static zic_t		min_time;
+static int		min_year;
+static zic_t		min_time;
+static int		noise;
+static const char *	rfilename;
+static int		rlinenum;
+static int		timecnt;
+static int		typecnt;
+
+/*
+** Line codes.
+*/
+
+#define LC_RULE		0
+#define LC_ZONE		1
+#define LC_LINK		2
+#define LC_LEAP		3
+
+/*
+** Which fields are which on a Zone line.
+*/
+
+#define ZF_NAME		1
+#define ZF_GMTOFF	2
+#define ZF_RULE		3
+#define ZF_FORMAT	4
+#define ZF_TILYEAR	5
+#define ZF_TILMONTH	6
+#define ZF_TILDAY	7
+#define ZF_TILTIME	8
+#define ZONE_MINFIELDS	5
+#define ZONE_MAXFIELDS	9
+
+/*
+** Which fields are which on a Zone continuation line.
+*/
+
+#define ZFC_GMTOFF	0
+#define ZFC_RULE	1
+#define ZFC_FORMAT	2
+#define ZFC_TILYEAR	3
+#define ZFC_TILMONTH	4
+#define ZFC_TILDAY	5
+#define ZFC_TILTIME	6
+#define ZONEC_MINFIELDS	3
+#define ZONEC_MAXFIELDS	7
+
+/*
+** Which files are which on a Rule line.
+*/
+
+#define RF_NAME		1
+#define RF_LOYEAR	2
+#define RF_HIYEAR	3
+#define RF_COMMAND	4
+#define RF_MONTH	5
+#define RF_DAY		6
+#define RF_TOD		7
+#define RF_STDOFF	8
+#define RF_ABBRVAR	9
+#define RULE_FIELDS	10
+
+/*
+** Which fields are which on a Link line.
+*/
+
+#define LF_FROM		1
+#define LF_TO		2
+#define LINK_FIELDS	3
+
+/*
+** Which fields are which on a Leap line.
+*/
+
+#define LP_YEAR		1
+#define LP_MONTH	2
+#define LP_DAY		3
+#define LP_TIME		4
+#define LP_CORR		5
+#define LP_ROLL		6
+#define LEAP_FIELDS	7
+
+/*
+** Year synonyms.
+*/
+
+#define YR_MINIMUM	0
+#define YR_MAXIMUM	1
+#define YR_ONLY		2
+
+static struct rule *	rules;
+static int		nrules;	/* number of rules */
+
+static struct zone *	zones;
+static int		nzones;	/* number of zones */
+
+struct link {
+	const char *	l_filename;
+	int		l_linenum;
+	const char *	l_from;
+	const char *	l_to;
+};
+
+static struct link *	links;
+static int		nlinks;
+
+struct lookup {
+	const char *	l_word;
+	const int	l_value;
+};
+
+static struct lookup const *	byword(const char * string,
+					const struct lookup * lp);
+
+static struct lookup const	line_codes[] = {
+	{ "Rule",	LC_RULE },
+	{ "Zone",	LC_ZONE },
+	{ "Link",	LC_LINK },
+	{ "Leap",	LC_LEAP },
+	{ NULL,		0}
+};
+
+static struct lookup const	mon_names[] = {
+	{ "January",	TM_JANUARY },
+	{ "February",	TM_FEBRUARY },
+	{ "March",	TM_MARCH },
+	{ "April",	TM_APRIL },
+	{ "May",	TM_MAY },
+	{ "June",	TM_JUNE },
+	{ "July",	TM_JULY },
+	{ "August",	TM_AUGUST },
+	{ "September",	TM_SEPTEMBER },
+	{ "October",	TM_OCTOBER },
+	{ "November",	TM_NOVEMBER },
+	{ "December",	TM_DECEMBER },
+	{ NULL,		0 }
+};
+
+static struct lookup const	wday_names[] = {
+	{ "Sunday",	TM_SUNDAY },
+	{ "Monday",	TM_MONDAY },
+	{ "Tuesday",	TM_TUESDAY },
+	{ "Wednesday",	TM_WEDNESDAY },
+	{ "Thursday",	TM_THURSDAY },
+	{ "Friday",	TM_FRIDAY },
+	{ "Saturday",	TM_SATURDAY },
+	{ NULL,		0 }
+};
+
+static struct lookup const	lasts[] = {
+	{ "last-Sunday",	TM_SUNDAY },
+	{ "last-Monday",	TM_MONDAY },
+	{ "last-Tuesday",	TM_TUESDAY },
+	{ "last-Wednesday",	TM_WEDNESDAY },
+	{ "last-Thursday",	TM_THURSDAY },
+	{ "last-Friday",	TM_FRIDAY },
+	{ "last-Saturday",	TM_SATURDAY },
+	{ NULL,			0 }
+};
+
+static struct lookup const	begin_years[] = {
+	{ "minimum",	YR_MINIMUM },
+	{ "maximum",	YR_MAXIMUM },
+	{ NULL,		0 }
+};
+
+static struct lookup const	end_years[] = {
+	{ "minimum",	YR_MINIMUM },
+	{ "maximum",	YR_MAXIMUM },
+	{ "only",	YR_ONLY },
+	{ NULL,		0 }
+};
+
+static struct lookup const	leap_types[] = {
+	{ "Rolling",	TRUE },
+	{ "Stationary",	FALSE },
+	{ NULL,		0 }
+};
+
+static const int	len_months[2][MONSPERYEAR] = {
+	{ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
+	{ 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
+};
+
+static const int	len_years[2] = {
+	DAYSPERNYEAR, DAYSPERLYEAR
+};
+
+static struct attype {
+	zic_t		at;
+	unsigned char	type;
+}			attypes[TZ_MAX_TIMES];
+static long		gmtoffs[TZ_MAX_TYPES];
+static char		isdsts[TZ_MAX_TYPES];
+static unsigned char	abbrinds[TZ_MAX_TYPES];
+static char		ttisstds[TZ_MAX_TYPES];
+static char		ttisgmts[TZ_MAX_TYPES];
+static char		chars[TZ_MAX_CHARS];
+static zic_t		trans[TZ_MAX_LEAPS];
+static long		corr[TZ_MAX_LEAPS];
+static char		roll[TZ_MAX_LEAPS];
+
+/*
+** Memory allocation.
+*/
+
+static char *
+memcheck(ptr)
+char * const	ptr;
+{
+	if (ptr == NULL)
+		errx(EXIT_FAILURE, _("memory exhausted"));
+	return ptr;
+}
+
+#define emalloc(size)		memcheck(imalloc(size))
+#define erealloc(ptr, size)	memcheck(irealloc((ptr), (size)))
+#define ecpyalloc(ptr)		memcheck(icpyalloc(ptr))
+#define ecatalloc(oldp, newp)	memcheck(icatalloc((oldp), (newp)))
+
+/*
+** Error handling.
+*/
+
+static void
+eats(name, num, rname, rnum)
+const char * const	name;
+const int		num;
+const char * const	rname;
+const int		rnum;
+{
+	filename = name;
+	linenum = num;
+	rfilename = rname;
+	rlinenum = rnum;
+}
+
+static void
+eat(name, num)
+const char * const	name;
+const int		num;
+{
+	eats(name, num, (char *) NULL, -1);
+}
+
+static void
+error(string)
+const char * const	string;
+{
+	/*
+	** Match the format of "cc" to allow sh users to
+	**	zic ... 2>&1 | error -t "*" -v
+	** on BSD systems.
+	*/
+	(void) fprintf(stderr, _("\"%s\", line %d: %s"),
+		filename, linenum, string);
+	if (rfilename != NULL)
+		(void) fprintf(stderr, _(" (rule from \"%s\", line %d)"),
+			rfilename, rlinenum);
+	(void) fprintf(stderr, "\n");
+	++errors;
+}
+
+static void
+warning(string)
+const char * const	string;
+{
+	char *	cp;
+
+	cp = ecpyalloc(_("warning: "));
+	cp = ecatalloc(cp, string);
+	error(cp);
+	ifree(cp);
+	--errors;
+}
+
+static void
+usage(FILE *stream, int status)
+  {
+	(void) fprintf(stream, _("usage is zic \
+[ --version ] [--help] [ -v ] [ -l localtime ] [ -p posixrules ] \\\n\
+\t[ -d directory ] [ -L leapseconds ] [ -y yearistype ] [ filename ... ]\n\
+\n\
+Report bugs to tz@elsie.nci.nih.gov.\n"));
+	exit(status);
+}
+
+static const char *	psxrules;
+static const char *	lcltime;
+static const char *	directory;
+static const char *	leapsec;
+static const char *	yitcommand;
+static int		Dflag;
+static uid_t		uflag = (uid_t)-1;
+static gid_t		gflag = (gid_t)-1;
+static mode_t		mflag = (S_IRUSR | S_IRGRP | S_IROTH
+				 | S_IWUSR);
+
+int
+main(argc, argv)
+int	argc;
+char *	argv[];
+{
+	register int	i;
+	register int	j;
+	register int	c;
+
+#ifdef unix
+	(void) umask(umask(S_IWGRP | S_IWOTH) | (S_IWGRP | S_IWOTH));
+#endif /* defined unix */
+#if HAVE_GETTEXT
+	(void) setlocale(LC_ALL, "");
+#ifdef TZ_DOMAINDIR
+	(void) bindtextdomain(TZ_DOMAIN, TZ_DOMAINDIR);
+#endif /* defined TEXTDOMAINDIR */
+	(void) textdomain(TZ_DOMAIN);
+#endif /* HAVE_GETTEXT */
+	if (TYPE_BIT(zic_t) < 64) {
+		(void) fprintf(stderr, "zic: %s\n",
+			_("wild compilation-time specification of zic_t"));
+		exit(EXIT_FAILURE);
+	}
+	for (i = 1; i < argc; ++i)
+		if (strcmp(argv[i], "--version") == 0) {
+			errx(EXIT_SUCCESS, "%s", elsieid);
+ 		} else if (strcmp(argv[i], "--help") == 0) {
+ 			usage(stdout, EXIT_SUCCESS);
+		}
+	while ((c = getopt(argc, argv, "Dd:g:l:m:p:L:u:vsy:")) != -1)
+		switch (c) {
+			default:
+				usage(stderr, EXIT_FAILURE);
+			case 'D':
+				Dflag = 1;
+				break;
+			case 'd':
+				if (directory == NULL)
+					directory = optarg;
+				else
+					errx(EXIT_FAILURE,
+_("more than one -d option specified"));
+				break;
+			case 'g':
+				setgroup(&gflag, optarg);
+				break;
+			case 'l':
+				if (lcltime == NULL)
+					lcltime = optarg;
+				else
+					errx(EXIT_FAILURE,
+_("more than one -l option specified"));
+				break;
+			case 'm':
+			{
+				void *set = setmode(optarg);
+				if (set == NULL)
+					errx(EXIT_FAILURE,
+_("invalid file mode"));
+				mflag = getmode(set, mflag);
+				free(set);
+				break;
+			}
+			case 'p':
+				if (psxrules == NULL)
+					psxrules = optarg;
+				else
+					errx(EXIT_FAILURE,
+_("more than one -p option specified"));
+				break;
+			case 'u':
+				setuser(&uflag, optarg);
+				break;
+			case 'y':
+				if (yitcommand == NULL)
+					yitcommand = optarg;
+				else
+					errx(EXIT_FAILURE,
+_("more than one -y option specified"));
+				break;
+			case 'L':
+				if (leapsec == NULL)
+					leapsec = optarg;
+				else
+					errx(EXIT_FAILURE,
+_("more than one -L option specified"));
+				break;
+			case 'v':
+				noise = TRUE;
+				break;
+			case 's':
+				(void) printf("zic: -s ignored\n");
+				break;
+		}
+	if (optind == argc - 1 && strcmp(argv[optind], "=") == 0)
+		usage(stderr, EXIT_FAILURE);	/* usage message by request */
+	if (directory == NULL)
+		directory = TZDIR;
+	if (yitcommand == NULL)
+		yitcommand = "yearistype";
+
+	setboundaries();
+
+	if (optind < argc && leapsec != NULL) {
+		infile(leapsec);
+		adjleap();
+	}
+
+	for (i = optind; i < argc; ++i)
+		infile(argv[i]);
+	if (errors)
+		exit(EXIT_FAILURE);
+	associate();
+	for (i = 0; i < nzones; i = j) {
+		/*
+		** Find the next non-continuation zone entry.
+		*/
+		for (j = i + 1; j < nzones && zones[j].z_name == NULL; ++j)
+			continue;
+		outzone(&zones[i], j - i);
+	}
+	/*
+	** Make links.
+	*/
+	for (i = 0; i < nlinks; ++i) {
+		eat(links[i].l_filename, links[i].l_linenum);
+		dolink(links[i].l_from, links[i].l_to);
+		if (noise)
+			for (j = 0; j < nlinks; ++j)
+				if (strcmp(links[i].l_to,
+					links[j].l_from) == 0)
+						warning(_("link to link"));
+	}
+	if (lcltime != NULL) {
+		eat("command line", 1);
+		dolink(lcltime, TZDEFAULT);
+	}
+	if (psxrules != NULL) {
+		eat("command line", 1);
+		dolink(psxrules, TZDEFRULES);
+	}
+	return (errors == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
+}
+
+static void
+dolink(fromfield, tofield)
+const char * const	fromfield;
+const char * const	tofield;
+{
+	register char *	fromname;
+	register char *	toname;
+
+	if (fromfield[0] == '/')
+		fromname = ecpyalloc(fromfield);
+	else {
+		fromname = ecpyalloc(directory);
+		fromname = ecatalloc(fromname, "/");
+		fromname = ecatalloc(fromname, fromfield);
+	}
+	if (tofield[0] == '/')
+		toname = ecpyalloc(tofield);
+	else {
+		toname = ecpyalloc(directory);
+		toname = ecatalloc(toname, "/");
+		toname = ecatalloc(toname, tofield);
+	}
+	/*
+	** We get to be careful here since
+	** there's a fair chance of root running us.
+	*/
+	if (!itsdir(toname))
+		(void) remove(toname);
+	if (link(fromname, toname) != 0) {
+		int	result;
+
+		if (mkdirs(toname) != 0)
+			exit(EXIT_FAILURE);
+
+		result = link(fromname, toname);
+#if HAVE_SYMLINK
+		if (result != 0 &&
+			access(fromname, F_OK) == 0 &&
+			!itsdir(fromname)) {
+				const char *s = tofield;
+				register char * symlinkcontents = NULL;
+				while ((s = strchr(s+1, '/')) != NULL)
+					symlinkcontents =
+						ecatalloc(symlinkcontents,
+						"../");
+				symlinkcontents =
+					ecatalloc(symlinkcontents,
+					fromname);
+				result =
+					symlink(symlinkcontents,
+					toname);
+				if (result == 0)
+warning(_("hard link failed, symbolic link used"));
+				ifree(symlinkcontents);
+		}
+#endif /* HAVE_SYMLINK */
+		if (result != 0) {
+			err(EXIT_FAILURE, _("can't link from %s to %s"),
+			    fromname, toname);
+		}
+	}
+	ifree(fromname);
+	ifree(toname);
+}
+
+#define TIME_T_BITS_IN_FILE	64
+
+static void
+setboundaries (void)
+{
+	register int	i;
+
+	min_time = -1;
+	for (i = 0; i < TIME_T_BITS_IN_FILE - 1; ++i)
+		min_time *= 2;
+	max_time = -(min_time + 1);
+}
+
+static int
+itsdir(name)
+const char * const	name;
+{
+	register char *	myname;
+	register int	accres;
+
+	myname = ecpyalloc(name);
+	myname = ecatalloc(myname, "/.");
+	accres = access(myname, F_OK);
+	ifree(myname);
+	return accres == 0;
+}
+
+/*
+** Associate sets of rules with zones.
+*/
+
+/*
+** Sort by rule name.
+*/
+
+static int
+rcomp(cp1, cp2)
+const void *	cp1;
+const void *	cp2;
+{
+	return strcmp(((const struct rule *) cp1)->r_name,
+		((const struct rule *) cp2)->r_name);
+}
+
+static void
+associate(void)
+{
+	register struct zone *	zp;
+	register struct rule *	rp;
+	register int		base, out;
+	register int		i, j;
+
+	if (nrules != 0) {
+		(void) qsort((void *) rules, (size_t) nrules,
+			(size_t) sizeof *rules, rcomp);
+		for (i = 0; i < nrules - 1; ++i) {
+			if (strcmp(rules[i].r_name,
+				rules[i + 1].r_name) != 0)
+					continue;
+			if (strcmp(rules[i].r_filename,
+				rules[i + 1].r_filename) == 0)
+					continue;
+			eat(rules[i].r_filename, rules[i].r_linenum);
+			warning(_("same rule name in multiple files"));
+			eat(rules[i + 1].r_filename, rules[i + 1].r_linenum);
+			warning(_("same rule name in multiple files"));
+			for (j = i + 2; j < nrules; ++j) {
+				if (strcmp(rules[i].r_name,
+					rules[j].r_name) != 0)
+						break;
+				if (strcmp(rules[i].r_filename,
+					rules[j].r_filename) == 0)
+						continue;
+				if (strcmp(rules[i + 1].r_filename,
+					rules[j].r_filename) == 0)
+						continue;
+				break;
+			}
+			i = j - 1;
+		}
+	}
+	for (i = 0; i < nzones; ++i) {
+		zp = &zones[i];
+		zp->z_rules = NULL;
+		zp->z_nrules = 0;
+	}
+	for (base = 0; base < nrules; base = out) {
+		rp = &rules[base];
+		for (out = base + 1; out < nrules; ++out)
+			if (strcmp(rp->r_name, rules[out].r_name) != 0)
+				break;
+		for (i = 0; i < nzones; ++i) {
+			zp = &zones[i];
+			if (strcmp(zp->z_rule, rp->r_name) != 0)
+				continue;
+			zp->z_rules = rp;
+			zp->z_nrules = out - base;
+		}
+	}
+	for (i = 0; i < nzones; ++i) {
+		zp = &zones[i];
+		if (zp->z_nrules == 0) {
+			/*
+			** Maybe we have a local standard time offset.
+			*/
+			eat(zp->z_filename, zp->z_linenum);
+			zp->z_stdoff = gethms(zp->z_rule, _("unruly zone"),
+				TRUE);
+			/*
+			** Note, though, that if there's no rule,
+			** a '%s' in the format is a bad thing.
+			*/
+			if (strchr(zp->z_format, '%') != 0)
+				error(_("%s in ruleless zone"));
+		}
+	}
+	if (errors)
+		exit(EXIT_FAILURE);
+}
+
+static void
+infile(name)
+const char *	name;
+{
+	register FILE *			fp;
+	register char **		fields;
+	register char *			cp;
+	register const struct lookup *	lp;
+	register int			nfields;
+	register int			wantcont;
+	register int			num;
+	char				buf[BUFSIZ];
+
+	if (strcmp(name, "-") == 0) {
+		name = _("standard input");
+		fp = stdin;
+	} else if ((fp = fopen(name, "r")) == NULL)
+		err(EXIT_FAILURE, _("can't open %s"), name);
+	wantcont = FALSE;
+	for (num = 1; ; ++num) {
+		eat(name, num);
+		if (fgets(buf, (int) sizeof buf, fp) != buf)
+			break;
+		cp = strchr(buf, '\n');
+		if (cp == NULL) {
+			error(_("line too long"));
+			exit(EXIT_FAILURE);
+		}
+		*cp = '\0';
+		fields = getfields(buf);
+		nfields = 0;
+		while (fields[nfields] != NULL) {
+			static char	nada;
+
+			if (strcmp(fields[nfields], "-") == 0)
+				fields[nfields] = &nada;
+			++nfields;
+		}
+		if (nfields == 0) {
+			/* nothing to do */
+		} else if (wantcont) {
+			wantcont = inzcont(fields, nfields);
+		} else {
+			lp = byword(fields[0], line_codes);
+			if (lp == NULL)
+				error(_("input line of unknown type"));
+			else switch ((int) (lp->l_value)) {
+				case LC_RULE:
+					inrule(fields, nfields);
+					wantcont = FALSE;
+					break;
+				case LC_ZONE:
+					wantcont = inzone(fields, nfields);
+					break;
+				case LC_LINK:
+					inlink(fields, nfields);
+					wantcont = FALSE;
+					break;
+				case LC_LEAP:
+					if (name != leapsec)
+						warnx(
+_("leap line in non leap seconds file %s"), name);
+					else	inleap(fields, nfields);
+					wantcont = FALSE;
+					break;
+				default:	/* "cannot happen" */
+					errx(EXIT_FAILURE,
+_("panic: invalid l_value %d"), lp->l_value);
+			}
+		}
+		ifree((char *) fields);
+	}
+	if (ferror(fp))
+		errx(EXIT_FAILURE, _("error reading %s"), filename);
+	if (fp != stdin && fclose(fp))
+		err(EXIT_FAILURE, _("error closing %s"), filename);
+	if (wantcont)
+		error(_("expected continuation line not found"));
+}
+
+/*
+** Convert a string of one of the forms
+**	h	-h	hh:mm	-hh:mm	hh:mm:ss	-hh:mm:ss
+** into a number of seconds.
+** A null string maps to zero.
+** Call error with errstring and return zero on errors.
+*/
+
+static long
+gethms(string, errstring, signable)
+const char *		string;
+const char * const	errstring;
+const int		signable;
+{
+	long	hh;
+	int	mm, ss, sign;
+
+	if (string == NULL || *string == '\0')
+		return 0;
+	if (!signable)
+		sign = 1;
+	else if (*string == '-') {
+		sign = -1;
+		++string;
+	} else	sign = 1;
+	if (sscanf(string, scheck(string, "%ld"), &hh) == 1)
+		mm = ss = 0;
+	else if (sscanf(string, scheck(string, "%ld:%d"), &hh, &mm) == 2)
+		ss = 0;
+	else if (sscanf(string, scheck(string, "%ld:%d:%d"),
+		&hh, &mm, &ss) != 3) {
+			error(errstring);
+			return 0;
+	}
+	if (hh < 0 ||
+		mm < 0 || mm >= MINSPERHOUR ||
+		ss < 0 || ss > SECSPERMIN) {
+			error(errstring);
+			return 0;
+	}
+	if (LONG_MAX / SECSPERHOUR < hh) {
+		error(_("time overflow"));
+		return 0;
+	}
+	if (noise && hh == HOURSPERDAY && mm == 0 && ss == 0)
+		warning(_("24:00 not handled by pre-1998 versions of zic"));
+	if (noise && (hh > HOURSPERDAY ||
+		(hh == HOURSPERDAY && (mm != 0 || ss != 0))))
+warning(_("values over 24 hours not handled by pre-2007 versions of zic"));
+	return oadd(eitol(sign) * hh * eitol(SECSPERHOUR),
+		    eitol(sign) * (eitol(mm) * eitol(SECSPERMIN) + eitol(ss)));
+}
+
+static void
+inrule(fields, nfields)
+register char ** const	fields;
+const int		nfields;
+{
+	static struct rule	r;
+
+	if (nfields != RULE_FIELDS) {
+		error(_("wrong number of fields on Rule line"));
+		return;
+	}
+	if (*fields[RF_NAME] == '\0') {
+		error(_("nameless rule"));
+		return;
+	}
+	r.r_filename = filename;
+	r.r_linenum = linenum;
+	r.r_stdoff = gethms(fields[RF_STDOFF], _("invalid saved time"), TRUE);
+	rulesub(&r, fields[RF_LOYEAR], fields[RF_HIYEAR], fields[RF_COMMAND],
+		fields[RF_MONTH], fields[RF_DAY], fields[RF_TOD]);
+	r.r_name = ecpyalloc(fields[RF_NAME]);
+	r.r_abbrvar = ecpyalloc(fields[RF_ABBRVAR]);
+	if (max_abbrvar_len < strlen(r.r_abbrvar))
+		max_abbrvar_len = strlen(r.r_abbrvar);
+	rules = (struct rule *) (void *) erealloc((char *) rules,
+		(int) ((nrules + 1) * sizeof *rules));
+	rules[nrules++] = r;
+}
+
+static int
+inzone(fields, nfields)
+register char ** const	fields;
+const int		nfields;
+{
+	register int	i;
+	static char *	buf;
+
+	if (nfields < ZONE_MINFIELDS || nfields > ZONE_MAXFIELDS) {
+		error(_("wrong number of fields on Zone line"));
+		return FALSE;
+	}
+	if (strcmp(fields[ZF_NAME], TZDEFAULT) == 0 && lcltime != NULL) {
+		buf = erealloc(buf, (int) (132 + strlen(TZDEFAULT)));
+		(void) sprintf(buf,
+_("\"Zone %s\" line and -l option are mutually exclusive"),
+			TZDEFAULT);
+		error(buf);
+		return FALSE;
+	}
+	if (strcmp(fields[ZF_NAME], TZDEFRULES) == 0 && psxrules != NULL) {
+		buf = erealloc(buf, (int) (132 + strlen(TZDEFRULES)));
+		(void) sprintf(buf,
+_("\"Zone %s\" line and -p option are mutually exclusive"),
+			TZDEFRULES);
+		error(buf);
+		return FALSE;
+	}
+	for (i = 0; i < nzones; ++i)
+		if (zones[i].z_name != NULL &&
+			strcmp(zones[i].z_name, fields[ZF_NAME]) == 0) {
+				buf = erealloc(buf, (int) (132 +
+					strlen(fields[ZF_NAME]) +
+					strlen(zones[i].z_filename)));
+				(void) sprintf(buf,
+_("duplicate zone name %s (file \"%s\", line %d)"),
+					fields[ZF_NAME],
+					zones[i].z_filename,
+					zones[i].z_linenum);
+				error(buf);
+				return FALSE;
+		}
+	return inzsub(fields, nfields, FALSE);
+}
+
+static int
+inzcont(fields, nfields)
+register char ** const	fields;
+const int		nfields;
+{
+	if (nfields < ZONEC_MINFIELDS || nfields > ZONEC_MAXFIELDS) {
+		error(_("wrong number of fields on Zone continuation line"));
+		return FALSE;
+	}
+	return inzsub(fields, nfields, TRUE);
+}
+
+static int
+inzsub(fields, nfields, iscont)
+register char ** const	fields;
+const int		nfields;
+const int		iscont;
+{
+	register char *		cp;
+	static struct zone	z;
+	register int		i_gmtoff, i_rule, i_format;
+	register int		i_untilyear, i_untilmonth;
+	register int		i_untilday, i_untiltime;
+	register int		hasuntil;
+
+	if (iscont) {
+		i_gmtoff = ZFC_GMTOFF;
+		i_rule = ZFC_RULE;
+		i_format = ZFC_FORMAT;
+		i_untilyear = ZFC_TILYEAR;
+		i_untilmonth = ZFC_TILMONTH;
+		i_untilday = ZFC_TILDAY;
+		i_untiltime = ZFC_TILTIME;
+		z.z_name = NULL;
+	} else {
+		i_gmtoff = ZF_GMTOFF;
+		i_rule = ZF_RULE;
+		i_format = ZF_FORMAT;
+		i_untilyear = ZF_TILYEAR;
+		i_untilmonth = ZF_TILMONTH;
+		i_untilday = ZF_TILDAY;
+		i_untiltime = ZF_TILTIME;
+		z.z_name = ecpyalloc(fields[ZF_NAME]);
+	}
+	z.z_filename = filename;
+	z.z_linenum = linenum;
+	z.z_gmtoff = gethms(fields[i_gmtoff], _("invalid UTC offset"), TRUE);
+	if ((cp = strchr(fields[i_format], '%')) != 0) {
+		if (*++cp != 's' || strchr(cp, '%') != 0) {
+			error(_("invalid abbreviation format"));
+			return FALSE;
+		}
+	}
+	z.z_rule = ecpyalloc(fields[i_rule]);
+	z.z_format = ecpyalloc(fields[i_format]);
+	if (max_format_len < strlen(z.z_format))
+		max_format_len = strlen(z.z_format);
+	hasuntil = nfields > i_untilyear;
+	if (hasuntil) {
+		z.z_untilrule.r_filename = filename;
+		z.z_untilrule.r_linenum = linenum;
+		rulesub(&z.z_untilrule,
+			fields[i_untilyear],
+			"only",
+			"",
+			(nfields > i_untilmonth) ?
+			fields[i_untilmonth] : "Jan",
+			(nfields > i_untilday) ? fields[i_untilday] : "1",
+			(nfields > i_untiltime) ? fields[i_untiltime] : "0");
+		z.z_untiltime = rpytime(&z.z_untilrule,
+			z.z_untilrule.r_loyear);
+		if (iscont && nzones > 0 &&
+			z.z_untiltime > min_time &&
+			z.z_untiltime < max_time &&
+			zones[nzones - 1].z_untiltime > min_time &&
+			zones[nzones - 1].z_untiltime < max_time &&
+			zones[nzones - 1].z_untiltime >= z.z_untiltime) {
+				error(_(
+"Zone continuation line end time is not after end time of previous line"
+					));
+				return FALSE;
+		}
+	}
+	zones = (struct zone *) (void *) erealloc((char *) zones,
+		(int) ((nzones + 1) * sizeof *zones));
+	zones[nzones++] = z;
+	/*
+	** If there was an UNTIL field on this line,
+	** there's more information about the zone on the next line.
+	*/
+	return hasuntil;
+}
+
+static void
+inleap(fields, nfields)
+register char ** const	fields;
+const int		nfields;
+{
+	register const char *		cp;
+	register const struct lookup *	lp;
+	register int			i, j;
+	int				year, month, day;
+	long				dayoff, tod;
+	zic_t				t;
+
+	if (nfields != LEAP_FIELDS) {
+		error(_("wrong number of fields on Leap line"));
+		return;
+	}
+	dayoff = 0;
+	cp = fields[LP_YEAR];
+	if (sscanf(cp, scheck(cp, "%d"), &year) != 1) {
+		/*
+		** Leapin' Lizards!
+		*/
+		error(_("invalid leaping year"));
+		return;
+	}
+	if (!leapseen || leapmaxyear < year)
+		leapmaxyear = year;
+	if (!leapseen || leapminyear > year)
+		leapminyear = year;
+	leapseen = TRUE;
+	j = EPOCH_YEAR;
+	while (j != year) {
+		if (year > j) {
+			i = len_years[isleap(j)];
+			++j;
+		} else {
+			--j;
+			i = -len_years[isleap(j)];
+		}
+		dayoff = oadd(dayoff, eitol(i));
+	}
+	if ((lp = byword(fields[LP_MONTH], mon_names)) == NULL) {
+		error(_("invalid month name"));
+		return;
+	}
+	month = lp->l_value;
+	j = TM_JANUARY;
+	while (j != month) {
+		i = len_months[isleap(year)][j];
+		dayoff = oadd(dayoff, eitol(i));
+		++j;
+	}
+	cp = fields[LP_DAY];
+	if (sscanf(cp, scheck(cp, "%d"), &day) != 1 ||
+		day <= 0 || day > len_months[isleap(year)][month]) {
+			error(_("invalid day of month"));
+			return;
+	}
+	dayoff = oadd(dayoff, eitol(day - 1));
+	if (dayoff < 0 && !TYPE_SIGNED(zic_t)) {
+		error(_("time before zero"));
+		return;
+	}
+	if (dayoff < min_time / SECSPERDAY) {
+		error(_("time too small"));
+		return;
+	}
+	if (dayoff > max_time / SECSPERDAY) {
+		error(_("time too large"));
+		return;
+	}
+	t = (zic_t) dayoff * SECSPERDAY;
+	tod = gethms(fields[LP_TIME], _("invalid time of day"), FALSE);
+	cp = fields[LP_CORR];
+	{
+		register int	positive;
+		int		count;
+
+		if (strcmp(cp, "") == 0) { /* infile() turns "-" into "" */
+			positive = FALSE;
+			count = 1;
+		} else if (strcmp(cp, "--") == 0) {
+			positive = FALSE;
+			count = 2;
+		} else if (strcmp(cp, "+") == 0) {
+			positive = TRUE;
+			count = 1;
+		} else if (strcmp(cp, "++") == 0) {
+			positive = TRUE;
+			count = 2;
+		} else {
+			error(_("illegal CORRECTION field on Leap line"));
+			return;
+		}
+		if ((lp = byword(fields[LP_ROLL], leap_types)) == NULL) {
+			error(_(
+				"illegal Rolling/Stationary field on Leap line"
+				));
+			return;
+		}
+		leapadd(tadd(t, tod), positive, lp->l_value, count);
+	}
+}
+
+static void
+inlink(fields, nfields)
+register char ** const	fields;
+const int		nfields;
+{
+	struct link	l;
+
+	if (nfields != LINK_FIELDS) {
+		error(_("wrong number of fields on Link line"));
+		return;
+	}
+	if (*fields[LF_FROM] == '\0') {
+		error(_("blank FROM field on Link line"));
+		return;
+	}
+	if (*fields[LF_TO] == '\0') {
+		error(_("blank TO field on Link line"));
+		return;
+	}
+	l.l_filename = filename;
+	l.l_linenum = linenum;
+	l.l_from = ecpyalloc(fields[LF_FROM]);
+	l.l_to = ecpyalloc(fields[LF_TO]);
+	links = (struct link *) (void *) erealloc((char *) links,
+		(int) ((nlinks + 1) * sizeof *links));
+	links[nlinks++] = l;
+}
+
+static void
+rulesub(rp, loyearp, hiyearp, typep, monthp, dayp, timep)
+register struct rule * const	rp;
+const char * const		loyearp;
+const char * const		hiyearp;
+const char * const		typep;
+const char * const		monthp;
+const char * const		dayp;
+const char * const		timep;
+{
+	register const struct lookup *	lp;
+	register const char *		cp;
+	register char *			dp;
+	register char *			ep;
+
+	if ((lp = byword(monthp, mon_names)) == NULL) {
+		error(_("invalid month name"));
+		return;
+	}
+	rp->r_month = lp->l_value;
+	rp->r_todisstd = FALSE;
+	rp->r_todisgmt = FALSE;
+	dp = ecpyalloc(timep);
+	if (*dp != '\0') {
+		ep = dp + strlen(dp) - 1;
+		switch (lowerit(*ep)) {
+			case 's':	/* Standard */
+				rp->r_todisstd = TRUE;
+				rp->r_todisgmt = FALSE;
+				*ep = '\0';
+				break;
+			case 'w':	/* Wall */
+				rp->r_todisstd = FALSE;
+				rp->r_todisgmt = FALSE;
+				*ep = '\0';
+				break;
+			case 'g':	/* Greenwich */
+			case 'u':	/* Universal */
+			case 'z':	/* Zulu */
+				rp->r_todisstd = TRUE;
+				rp->r_todisgmt = TRUE;
+				*ep = '\0';
+				break;
+		}
+	}
+	rp->r_tod = gethms(dp, _("invalid time of day"), FALSE);
+	ifree(dp);
+	/*
+	** Year work.
+	*/
+	cp = loyearp;
+	lp = byword(cp, begin_years);
+	rp->r_lowasnum = lp == NULL;
+	if (!rp->r_lowasnum) switch ((int) lp->l_value) {
+		case YR_MINIMUM:
+			rp->r_loyear = INT_MIN;
+			break;
+		case YR_MAXIMUM:
+			rp->r_loyear = INT_MAX;
+			break;
+		default:	/* "cannot happen" */
+			errx(EXIT_FAILURE,
+				_("panic: invalid l_value %d"), lp->l_value);
+	} else if (sscanf(cp, scheck(cp, "%d"), &rp->r_loyear) != 1) {
+		error(_("invalid starting year"));
+		return;
+	}
+	cp = hiyearp;
+	lp = byword(cp, end_years);
+	rp->r_hiwasnum = lp == NULL;
+	if (!rp->r_hiwasnum) switch ((int) lp->l_value) {
+		case YR_MINIMUM:
+			rp->r_hiyear = INT_MIN;
+			break;
+		case YR_MAXIMUM:
+			rp->r_hiyear = INT_MAX;
+			break;
+		case YR_ONLY:
+			rp->r_hiyear = rp->r_loyear;
+			break;
+		default:	/* "cannot happen" */
+			errx(EXIT_FAILURE,
+				_("panic: invalid l_value %d"), lp->l_value);
+	} else if (sscanf(cp, scheck(cp, "%d"), &rp->r_hiyear) != 1) {
+		error(_("invalid ending year"));
+		return;
+	}
+	if (rp->r_loyear > rp->r_hiyear) {
+		error(_("starting year greater than ending year"));
+		return;
+	}
+	if (*typep == '\0')
+		rp->r_yrtype = NULL;
+	else {
+		if (rp->r_loyear == rp->r_hiyear) {
+			error(_("typed single year"));
+			return;
+		}
+		rp->r_yrtype = ecpyalloc(typep);
+	}
+	/*
+	** Day work.
+	** Accept things such as:
+	**	1
+	**	last-Sunday
+	**	Sun<=20
+	**	Sun>=7
+	*/
+	dp = ecpyalloc(dayp);
+	if ((lp = byword(dp, lasts)) != NULL) {
+		rp->r_dycode = DC_DOWLEQ;
+		rp->r_wday = lp->l_value;
+		rp->r_dayofmonth = len_months[1][rp->r_month];
+	} else {
+		if ((ep = strchr(dp, '<')) != 0)
+			rp->r_dycode = DC_DOWLEQ;
+		else if ((ep = strchr(dp, '>')) != 0)
+			rp->r_dycode = DC_DOWGEQ;
+		else {
+			ep = dp;
+			rp->r_dycode = DC_DOM;
+		}
+		if (rp->r_dycode != DC_DOM) {
+			*ep++ = 0;
+			if (*ep++ != '=') {
+				error(_("invalid day of month"));
+				ifree(dp);
+				return;
+			}
+			if ((lp = byword(dp, wday_names)) == NULL) {
+				error(_("invalid weekday name"));
+				ifree(dp);
+				return;
+			}
+			rp->r_wday = lp->l_value;
+		}
+		if (sscanf(ep, scheck(ep, "%d"), &rp->r_dayofmonth) != 1 ||
+			rp->r_dayofmonth <= 0 ||
+			(rp->r_dayofmonth > len_months[1][rp->r_month])) {
+				error(_("invalid day of month"));
+				ifree(dp);
+				return;
+		}
+	}
+	ifree(dp);
+}
+
+static void
+convert(val, buf)
+const long	val;
+char * const	buf;
+{
+	register int	i;
+	register int	shift;
+
+	for (i = 0, shift = 24; i < 4; ++i, shift -= 8)
+		buf[i] = val >> shift;
+}
+
+static void
+convert64(val, buf)
+const zic_t	val;
+char * const	buf;
+{
+	register int	i;
+	register int	shift;
+
+	for (i = 0, shift = 56; i < 8; ++i, shift -= 8)
+		buf[i] = val >> shift;
+}
+
+static void
+puttzcode(val, fp)
+const long	val;
+FILE * const	fp;
+{
+	char	buf[4];
+
+	convert(val, buf);
+	(void) fwrite((void *) buf, (size_t) sizeof buf, (size_t) 1, fp);
+}
+
+static void
+puttzcode64(val, fp)
+const zic_t	val;
+FILE * const	fp;
+{
+	char	buf[8];
+
+	convert64(val, buf);
+	(void) fwrite((void *) buf, (size_t) sizeof buf, (size_t) 1, fp);
+}
+
+static int
+atcomp(avp, bvp)
+const void *	avp;
+const void *	bvp;
+{
+	const zic_t	a = ((const struct attype *) avp)->at;
+	const zic_t	b = ((const struct attype *) bvp)->at;
+
+	return (a < b) ? -1 : (a > b);
+}
+
+static int
+is32(x)
+const zic_t	x;
+{
+	return INT32_MIN <= x && x <= INT32_MAX;
+}
+
+static void
+writezone(name, string)
+const char * const	name;
+const char * const	string;
+{
+	register FILE *			fp;
+	register int			i, j;
+	register int			leapcnt32, leapi32;
+	register int			timecnt32, timei32;
+	register int			pass;
+	static char *			fullname;
+	static const struct tzhead	tzh0;
+	static struct tzhead		tzh;
+	zic_t				ats[TZ_MAX_TIMES];
+	unsigned char			types[TZ_MAX_TIMES];
+
+	/*
+	** Sort.
+	*/
+	if (timecnt > 1)
+		(void) qsort((void *) attypes, (size_t) timecnt,
+			(size_t) sizeof *attypes, atcomp);
+	/*
+	** Optimize.
+	*/
+	{
+		int	fromi;
+		int	toi;
+
+		toi = 0;
+		fromi = 0;
+		while (fromi < timecnt && attypes[fromi].at < min_time)
+			++fromi;
+		if (isdsts[0] == 0)
+			while (fromi < timecnt && attypes[fromi].type == 0)
+				++fromi;	/* handled by default rule */
+		for ( ; fromi < timecnt; ++fromi) {
+			if (toi != 0 && ((attypes[fromi].at +
+				gmtoffs[attypes[toi - 1].type]) <=
+				(attypes[toi - 1].at + gmtoffs[toi == 1 ? 0
+				: attypes[toi - 2].type]))) {
+					attypes[toi - 1].type =
+						attypes[fromi].type;
+					continue;
+			}
+			if (toi == 0 ||
+				attypes[toi - 1].type != attypes[fromi].type)
+					attypes[toi++] = attypes[fromi];
+		}
+		timecnt = toi;
+	}
+	/*
+	** Transfer.
+	*/
+	for (i = 0; i < timecnt; ++i) {
+		ats[i] = attypes[i].at;
+		types[i] = attypes[i].type;
+	}
+	/*
+	** Correct for leap seconds.
+	*/
+	for (i = 0; i < timecnt; ++i) {
+		j = leapcnt;
+		while (--j >= 0)
+			if (ats[i] > trans[j] - corr[j]) {
+				ats[i] = tadd(ats[i], corr[j]);
+				break;
+			}
+	}
+	/*
+	** Figure out 32-bit-limited starts and counts.
+	*/
+	timecnt32 = timecnt;
+	timei32 = 0;
+	leapcnt32 = leapcnt;
+	leapi32 = 0;
+	while (timecnt32 > 0 && !is32(ats[timecnt32 - 1]))
+		--timecnt32;
+	while (timecnt32 > 0 && !is32(ats[timei32])) {
+		--timecnt32;
+		++timei32;
+	}
+	while (leapcnt32 > 0 && !is32(trans[leapcnt32 - 1]))
+		--leapcnt32;
+	while (leapcnt32 > 0 && !is32(trans[leapi32])) {
+		--leapcnt32;
+		++leapi32;
+	}
+	fullname = erealloc(fullname,
+		(int) (strlen(directory) + 1 + strlen(name) + 1));
+	(void) sprintf(fullname, "%s/%s", directory, name);
+
+	/*
+	 * Remove old file, if any, to snap links.
+	 */
+	if (!itsdir(fullname) && remove(fullname) != 0 && errno != ENOENT)
+		err(EXIT_FAILURE, _("can't remove %s"), fullname);
+
+	if ((fp = fopen(fullname, "wb")) == NULL) {
+		if (mkdirs(fullname) != 0)
+			exit(EXIT_FAILURE);
+		if ((fp = fopen(fullname, "wb")) == NULL)
+			err(EXIT_FAILURE, _("can't create %s"), fullname);
+	}
+	for (pass = 1; pass <= 2; ++pass) {
+		register int	thistimei, thistimecnt;
+		register int	thisleapi, thisleapcnt;
+		register int	thistimelim, thisleaplim;
+		int		writetype[TZ_MAX_TIMES];
+		int		typemap[TZ_MAX_TYPES];
+		register int	thistypecnt;
+		char		thischars[TZ_MAX_CHARS];
+		char		thischarcnt;
+		int 		indmap[TZ_MAX_CHARS];
+
+		if (pass == 1) {
+			thistimei = timei32;
+			thistimecnt = timecnt32;
+			thisleapi = leapi32;
+			thisleapcnt = leapcnt32;
+		} else {
+			thistimei = 0;
+			thistimecnt = timecnt;
+			thisleapi = 0;
+			thisleapcnt = leapcnt;
+		}
+		thistimelim = thistimei + thistimecnt;
+		thisleaplim = thisleapi + thisleapcnt;
+		for (i = 0; i < typecnt; ++i)
+			writetype[i] = thistimecnt == timecnt;
+		if (thistimecnt == 0) {
+			/*
+			** No transition times fall in the current
+			** (32- or 64-bit) window.
+			*/
+			if (typecnt != 0)
+				writetype[typecnt - 1] = TRUE;
+		} else {
+			for (i = thistimei - 1; i < thistimelim; ++i)
+				if (i >= 0)
+					writetype[types[i]] = TRUE;
+			/*
+			** For America/Godthab and Antarctica/Palmer
+			*/
+			if (thistimei == 0)
+				writetype[0] = TRUE;
+		}
+		thistypecnt = 0;
+		for (i = 0; i < typecnt; ++i)
+			typemap[i] = writetype[i] ?  thistypecnt++ : -1;
+		for (i = 0; i < sizeof indmap / sizeof indmap[0]; ++i)
+			indmap[i] = -1;
+		thischarcnt = 0;
+		for (i = 0; i < typecnt; ++i) {
+			register char *	thisabbr;
+
+			if (!writetype[i])
+				continue;
+			if (indmap[abbrinds[i]] >= 0)
+				continue;
+			thisabbr = &chars[abbrinds[i]];
+			for (j = 0; j < thischarcnt; ++j)
+				if (strcmp(&thischars[j], thisabbr) == 0)
+					break;
+			if (j == thischarcnt) {
+				(void) strcpy(&thischars[(int) thischarcnt],
+					thisabbr);
+				thischarcnt += strlen(thisabbr) + 1;
+			}
+			indmap[abbrinds[i]] = j;
+		}
+#define DO(field)	(void) fwrite((void *) tzh.field, \
+				(size_t) sizeof tzh.field, (size_t) 1, fp)
+		tzh = tzh0;
+		(void) strncpy(tzh.tzh_magic, TZ_MAGIC, sizeof tzh.tzh_magic);
+		tzh.tzh_version[0] = ZIC_VERSION;
+		convert(eitol(thistypecnt), tzh.tzh_ttisgmtcnt);
+		convert(eitol(thistypecnt), tzh.tzh_ttisstdcnt);
+		convert(eitol(thisleapcnt), tzh.tzh_leapcnt);
+		convert(eitol(thistimecnt), tzh.tzh_timecnt);
+		convert(eitol(thistypecnt), tzh.tzh_typecnt);
+		convert(eitol(thischarcnt), tzh.tzh_charcnt);
+		DO(tzh_magic);
+		DO(tzh_version);
+		DO(tzh_reserved);
+		DO(tzh_ttisgmtcnt);
+		DO(tzh_ttisstdcnt);
+		DO(tzh_leapcnt);
+		DO(tzh_timecnt);
+		DO(tzh_typecnt);
+		DO(tzh_charcnt);
+#undef DO
+		for (i = thistimei; i < thistimelim; ++i)
+			if (pass == 1)
+				puttzcode((long) ats[i], fp);
+			else	puttzcode64(ats[i], fp);
+		for (i = thistimei; i < thistimelim; ++i) {
+			unsigned char	uc;
+
+			uc = typemap[types[i]];
+			(void) fwrite((void *) &uc,
+				(size_t) sizeof uc,
+				(size_t) 1,
+				fp);
+		}
+		for (i = 0; i < typecnt; ++i)
+			if (writetype[i]) {
+				puttzcode(gmtoffs[i], fp);
+				(void) putc(isdsts[i], fp);
+				(void) putc((unsigned char) indmap[abbrinds[i]], fp);
+			}
+		if (thischarcnt != 0)
+			(void) fwrite((void *) thischars,
+				(size_t) sizeof thischars[0],
+				(size_t) thischarcnt, fp);
+		for (i = thisleapi; i < thisleaplim; ++i) {
+			register zic_t	todo;
+
+			if (roll[i]) {
+				if (timecnt == 0 || trans[i] < ats[0]) {
+					j = 0;
+					while (isdsts[j])
+						if (++j >= typecnt) {
+							j = 0;
+							break;
+						}
+				} else {
+					j = 1;
+					while (j < timecnt &&
+						trans[i] >= ats[j])
+							++j;
+					j = types[j - 1];
+				}
+				todo = tadd(trans[i], -gmtoffs[j]);
+			} else	todo = trans[i];
+			if (pass == 1)
+				puttzcode((long) todo, fp);
+			else	puttzcode64(todo, fp);
+			puttzcode(corr[i], fp);
+		}
+		for (i = 0; i < typecnt; ++i)
+			if (writetype[i])
+				(void) putc(ttisstds[i], fp);
+		for (i = 0; i < typecnt; ++i)
+			if (writetype[i])
+				(void) putc(ttisgmts[i], fp);
+	}
+	(void) fprintf(fp, "\n%s\n", string);
+	if (ferror(fp) || fclose(fp))
+		errx(EXIT_FAILURE, _("error writing %s"), fullname);
+	if (chmod(fullname, mflag) < 0)
+		err(EXIT_FAILURE, _("cannot change mode of %s to %03o"),
+		    fullname, (unsigned)mflag);
+	if ((uflag != (uid_t)-1 || gflag != (gid_t)-1)
+	    && chown(fullname, uflag, gflag) < 0)
+		err(EXIT_FAILURE, _("cannot change ownership of %s"), 
+		    fullname);
+}
+
+static void
+doabbr(abbr, format, letters, isdst, doquotes)
+char * const		abbr;
+const char * const	format;
+const char * const	letters;
+const int		isdst;
+const int		doquotes;
+{
+	register char *	cp;
+	register char *	slashp;
+	register int	len;
+
+	slashp = strchr(format, '/');
+	if (slashp == NULL) {
+		if (letters == NULL)
+			(void) strcpy(abbr, format);
+		else	(void) sprintf(abbr, format, letters);
+	} else if (isdst) {
+		(void) strcpy(abbr, slashp + 1);
+	} else {
+		if (slashp > format)
+			(void) strncpy(abbr, format,
+				(unsigned) (slashp - format));
+		abbr[slashp - format] = '\0';
+	}
+	if (!doquotes)
+		return;
+	for (cp = abbr; *cp != '\0'; ++cp)
+		if (strchr("ABCDEFGHIJKLMNOPQRSTUVWXYZ", *cp) == NULL &&
+			strchr("abcdefghijklmnopqrstuvwxyz", *cp) == NULL)
+				break;
+	len = strlen(abbr);
+	if (len > 0 && *cp == '\0')
+		return;
+	abbr[len + 2] = '\0';
+	abbr[len + 1] = '>';
+	for ( ; len > 0; --len)
+		abbr[len] = abbr[len - 1];
+	abbr[0] = '<';
+}
+
+static void
+updateminmax(x)
+const int	x;
+{
+	if (min_year > x)
+		min_year = x;
+	if (max_year < x)
+		max_year = x;
+}
+
+static int
+stringoffset(result, offset)
+char *	result;
+long	offset;
+{
+	register int	hours;
+	register int	minutes;
+	register int	seconds;
+
+	result[0] = '\0';
+	if (offset < 0) {
+		(void) strcpy(result, "-");
+		offset = -offset;
+	}
+	seconds = offset % SECSPERMIN;
+	offset /= SECSPERMIN;
+	minutes = offset % MINSPERHOUR;
+	offset /= MINSPERHOUR;
+	hours = offset;
+	if (hours >= HOURSPERDAY) {
+		result[0] = '\0';
+		return -1;
+	}
+	(void) sprintf(end(result), "%d", hours);
+	if (minutes != 0 || seconds != 0) {
+		(void) sprintf(end(result), ":%02d", minutes);
+		if (seconds != 0)
+			(void) sprintf(end(result), ":%02d", seconds);
+	}
+	return 0;
+}
+
+static int
+stringrule(result, rp, dstoff, gmtoff)
+char *				result;
+const struct rule * const	rp;
+const long			dstoff;
+const long			gmtoff;
+{
+	register long	tod;
+
+	result = end(result);
+	if (rp->r_dycode == DC_DOM) {
+		register int	month, total;
+
+		if (rp->r_dayofmonth == 29 && rp->r_month == TM_FEBRUARY)
+			return -1;
+		total = 0;
+		for (month = 0; month < rp->r_month; ++month)
+			total += len_months[0][month];
+		(void) sprintf(result, "J%d", total + rp->r_dayofmonth);
+	} else {
+		register int	week;
+
+		if (rp->r_dycode == DC_DOWGEQ) {
+			week = 1 + rp->r_dayofmonth / DAYSPERWEEK;
+			if ((week - 1) * DAYSPERWEEK + 1 != rp->r_dayofmonth)
+				return -1;
+		} else if (rp->r_dycode == DC_DOWLEQ) {
+			if (rp->r_dayofmonth == len_months[1][rp->r_month])
+				week = 5;
+			else {
+				week = 1 + rp->r_dayofmonth / DAYSPERWEEK;
+				if (week * DAYSPERWEEK - 1 != rp->r_dayofmonth)
+					return -1;
+			}
+		} else	return -1;	/* "cannot happen" */
+		(void) sprintf(result, "M%d.%d.%d",
+			rp->r_month + 1, week, rp->r_wday);
+	}
+	tod = rp->r_tod;
+	if (rp->r_todisgmt)
+		tod += gmtoff;
+	if (rp->r_todisstd && rp->r_stdoff == 0)
+		tod += dstoff;
+	if (tod < 0) {
+		result[0] = '\0';
+		return -1;
+	}
+	if (tod != 2 * SECSPERMIN * MINSPERHOUR) {
+		(void) strcat(result, "/");
+		if (stringoffset(end(result), tod) != 0)
+			return -1;
+	}
+	return 0;
+}
+
+static void
+stringzone(result, zpfirst, zonecount)
+char *				result;
+const struct zone * const	zpfirst;
+const int			zonecount;
+{
+	register const struct zone *	zp;
+	register struct rule *		rp;
+	register struct rule *		stdrp;
+	register struct rule *		dstrp;
+	register int			i;
+	register const char *		abbrvar;
+
+	result[0] = '\0';
+	zp = zpfirst + zonecount - 1;
+	stdrp = dstrp = NULL;
+	for (i = 0; i < zp->z_nrules; ++i) {
+		rp = &zp->z_rules[i];
+		if (rp->r_hiwasnum || rp->r_hiyear != INT_MAX)
+			continue;
+		if (rp->r_yrtype != NULL)
+			continue;
+		if (rp->r_stdoff == 0) {
+			if (stdrp == NULL)
+				stdrp = rp;
+			else	return;
+		} else {
+			if (dstrp == NULL)
+				dstrp = rp;
+			else	return;
+		}
+	}
+	if (stdrp == NULL && dstrp == NULL) {
+		/*
+		** There are no rules running through "max".
+		** Let's find the latest rule.
+		*/
+		for (i = 0; i < zp->z_nrules; ++i) {
+			rp = &zp->z_rules[i];
+			if (stdrp == NULL || rp->r_hiyear > stdrp->r_hiyear ||
+				(rp->r_hiyear == stdrp->r_hiyear &&
+				rp->r_month > stdrp->r_month))
+					stdrp = rp;
+		}
+		if (stdrp != NULL && stdrp->r_stdoff != 0)
+			return;	/* We end up in DST (a POSIX no-no). */
+		/*
+		** Horrid special case: if year is 2037,
+		** presume this is a zone handled on a year-by-year basis;
+		** do not try to apply a rule to the zone.
+		*/
+		if (stdrp != NULL && stdrp->r_hiyear == 2037)
+			return;
+	}
+	if (stdrp == NULL && (zp->z_nrules != 0 || zp->z_stdoff != 0))
+		return;
+	abbrvar = (stdrp == NULL) ? "" : stdrp->r_abbrvar;
+	doabbr(result, zp->z_format, abbrvar, FALSE, TRUE);
+	if (stringoffset(end(result), -zp->z_gmtoff) != 0) {
+		result[0] = '\0';
+		return;
+	}
+	if (dstrp == NULL)
+		return;
+	doabbr(end(result), zp->z_format, dstrp->r_abbrvar, TRUE, TRUE);
+	if (dstrp->r_stdoff != SECSPERMIN * MINSPERHOUR)
+		if (stringoffset(end(result),
+			-(zp->z_gmtoff + dstrp->r_stdoff)) != 0) {
+				result[0] = '\0';
+				return;
+		}
+	(void) strcat(result, ",");
+	if (stringrule(result, dstrp, dstrp->r_stdoff, zp->z_gmtoff) != 0) {
+		result[0] = '\0';
+		return;
+	}
+	(void) strcat(result, ",");
+	if (stringrule(result, stdrp, dstrp->r_stdoff, zp->z_gmtoff) != 0) {
+		result[0] = '\0';
+		return;
+	}
+}
+
+static void
+outzone(zpfirst, zonecount)
+const struct zone * const	zpfirst;
+const int			zonecount;
+{
+	register const struct zone *	zp;
+	register struct rule *		rp;
+	register int			i, j;
+	register int			usestart, useuntil;
+	register zic_t			starttime, untiltime;
+	register long			gmtoff;
+	register long			stdoff;
+	register int			year;
+	register long			startoff;
+	register int			startttisstd;
+	register int			startttisgmt;
+	register int			type;
+	register char *			startbuf;
+	register char *			ab;
+	register char *			envvar;
+	register int			max_abbr_len;
+	register int			max_envvar_len;
+
+	max_abbr_len = 2 + max_format_len + max_abbrvar_len;
+	max_envvar_len = 2 * max_abbr_len + 5 * 9;
+	startbuf = emalloc(max_abbr_len + 1);
+	ab = emalloc(max_abbr_len + 1);
+	envvar = emalloc(max_envvar_len + 1);
+	INITIALIZE(untiltime);
+	INITIALIZE(starttime);
+	/*
+	** Now. . .finally. . .generate some useful data!
+	*/
+	timecnt = 0;
+	typecnt = 0;
+	charcnt = 0;
+	/*
+	** Thanks to Earl Chew
+	** for noting the need to unconditionally initialize startttisstd.
+	*/
+	startttisstd = FALSE;
+	startttisgmt = FALSE;
+	min_year = max_year = EPOCH_YEAR;
+	if (leapseen) {
+		updateminmax(leapminyear);
+		updateminmax(leapmaxyear + (leapmaxyear < INT_MAX));
+	}
+	for (i = 0; i < zonecount; ++i) {
+		zp = &zpfirst[i];
+		if (i < zonecount - 1)
+			updateminmax(zp->z_untilrule.r_loyear);
+		for (j = 0; j < zp->z_nrules; ++j) {
+			rp = &zp->z_rules[j];
+			if (rp->r_lowasnum)
+				updateminmax(rp->r_loyear);
+			if (rp->r_hiwasnum)
+				updateminmax(rp->r_hiyear);
+		}
+	}
+	/*
+	** Generate lots of data if a rule can't cover all future times.
+	*/
+	stringzone(envvar, zpfirst, zonecount);
+	if (noise && envvar[0] == '\0') {
+		register char *	wp;
+
+wp = ecpyalloc(_("no POSIX environment variable for zone"));
+		wp = ecatalloc(wp, " ");
+		wp = ecatalloc(wp, zpfirst->z_name);
+		warning(wp);
+		ifree(wp);
+	}
+	if (envvar[0] == '\0') {
+		if (min_year >= INT_MIN + YEARSPERREPEAT)
+			min_year -= YEARSPERREPEAT;
+		else	min_year = INT_MIN;
+		if (max_year <= INT_MAX - YEARSPERREPEAT)
+			max_year += YEARSPERREPEAT;
+		else	max_year = INT_MAX;
+	}
+	/*
+	** For the benefit of older systems,
+	** generate data from 1900 through 2037.
+	*/
+	if (min_year > 1900)
+		min_year = 1900;
+	if (max_year < 2037)
+		max_year = 2037;
+	for (i = 0; i < zonecount; ++i) {
+		/*
+		** A guess that may well be corrected later.
+		*/
+		stdoff = 0;
+		zp = &zpfirst[i];
+		usestart = i > 0 && (zp - 1)->z_untiltime > min_time;
+		useuntil = i < (zonecount - 1);
+		if (useuntil && zp->z_untiltime <= min_time)
+			continue;
+		gmtoff = zp->z_gmtoff;
+		eat(zp->z_filename, zp->z_linenum);
+		*startbuf = '\0';
+		startoff = zp->z_gmtoff;
+		if (zp->z_nrules == 0) {
+			stdoff = zp->z_stdoff;
+			doabbr(startbuf, zp->z_format,
+				(char *) NULL, stdoff != 0, FALSE);
+			type = addtype(oadd(zp->z_gmtoff, stdoff),
+				startbuf, stdoff != 0, startttisstd,
+				startttisgmt);
+			if (usestart) {
+				addtt(starttime, type);
+				usestart = FALSE;
+			} else if (stdoff != 0)
+				addtt(min_time, type);
+		} else for (year = min_year; year <= max_year; ++year) {
+			if (useuntil && year > zp->z_untilrule.r_hiyear)
+				break;
+			/*
+			** Mark which rules to do in the current year.
+			** For those to do, calculate rpytime(rp, year);
+			*/
+			for (j = 0; j < zp->z_nrules; ++j) {
+				rp = &zp->z_rules[j];
+				eats(zp->z_filename, zp->z_linenum,
+					rp->r_filename, rp->r_linenum);
+				rp->r_todo = year >= rp->r_loyear &&
+						year <= rp->r_hiyear &&
+						yearistype(year, rp->r_yrtype);
+				if (rp->r_todo)
+					rp->r_temp = rpytime(rp, year);
+			}
+			for ( ; ; ) {
+				register int	k;
+				register zic_t	jtime, ktime;
+				register long	offset;
+
+				INITIALIZE(ktime);
+				if (useuntil) {
+					/*
+					** Turn untiltime into UTC
+					** assuming the current gmtoff and
+					** stdoff values.
+					*/
+					untiltime = zp->z_untiltime;
+					if (!zp->z_untilrule.r_todisgmt)
+						untiltime = tadd(untiltime,
+							-gmtoff);
+					if (!zp->z_untilrule.r_todisstd)
+						untiltime = tadd(untiltime,
+							-stdoff);
+				}
+				/*
+				** Find the rule (of those to do, if any)
+				** that takes effect earliest in the year.
+				*/
+				k = -1;
+				for (j = 0; j < zp->z_nrules; ++j) {
+					rp = &zp->z_rules[j];
+					if (!rp->r_todo)
+						continue;
+					eats(zp->z_filename, zp->z_linenum,
+						rp->r_filename, rp->r_linenum);
+					offset = rp->r_todisgmt ? 0 : gmtoff;
+					if (!rp->r_todisstd)
+						offset = oadd(offset, stdoff);
+					jtime = rp->r_temp;
+					if (jtime == min_time ||
+						jtime == max_time)
+							continue;
+					jtime = tadd(jtime, -offset);
+					if (k < 0 || jtime < ktime) {
+						k = j;
+						ktime = jtime;
+					}
+				}
+				if (k < 0)
+					break;	/* go on to next year */
+				rp = &zp->z_rules[k];
+				rp->r_todo = FALSE;
+				if (useuntil && ktime >= untiltime)
+					break;
+				stdoff = rp->r_stdoff;
+				if (usestart && ktime == starttime)
+					usestart = FALSE;
+				if (usestart) {
+					if (ktime < starttime) {
+						startoff = oadd(zp->z_gmtoff,
+							stdoff);
+						doabbr(startbuf, zp->z_format,
+							rp->r_abbrvar,
+							rp->r_stdoff != 0,
+							FALSE);
+						continue;
+					}
+					if (*startbuf == '\0' &&
+						startoff == oadd(zp->z_gmtoff,
+						stdoff)) {
+							doabbr(startbuf,
+								zp->z_format,
+								rp->r_abbrvar,
+								rp->r_stdoff !=
+								0,
+								FALSE);
+					}
+				}
+				eats(zp->z_filename, zp->z_linenum,
+					rp->r_filename, rp->r_linenum);
+				doabbr(ab, zp->z_format, rp->r_abbrvar,
+					rp->r_stdoff != 0, FALSE);
+				offset = oadd(zp->z_gmtoff, rp->r_stdoff);
+				type = addtype(offset, ab, rp->r_stdoff != 0,
+					rp->r_todisstd, rp->r_todisgmt);
+				addtt(ktime, type);
+			}
+		}
+		if (usestart) {
+			if (*startbuf == '\0' &&
+				zp->z_format != NULL &&
+				strchr(zp->z_format, '%') == NULL &&
+				strchr(zp->z_format, '/') == NULL)
+					(void) strcpy(startbuf, zp->z_format);
+			eat(zp->z_filename, zp->z_linenum);
+			if (*startbuf == '\0')
+error(_("can't determine time zone abbreviation to use just after until time"));
+			else	addtt(starttime,
+					addtype(startoff, startbuf,
+						startoff != zp->z_gmtoff,
+						startttisstd,
+						startttisgmt));
+		}
+		/*
+		** Now we may get to set starttime for the next zone line.
+		*/
+		if (useuntil) {
+			startttisstd = zp->z_untilrule.r_todisstd;
+			startttisgmt = zp->z_untilrule.r_todisgmt;
+			starttime = zp->z_untiltime;
+			if (!startttisstd)
+				starttime = tadd(starttime, -stdoff);
+			if (!startttisgmt)
+				starttime = tadd(starttime, -gmtoff);
+		}
+	}
+	writezone(zpfirst->z_name, envvar);
+	ifree(startbuf);
+	ifree(ab);
+	ifree(envvar);
+}
+
+static void
+addtt(starttime, type)
+const zic_t	starttime;
+int		type;
+{
+	if (starttime <= min_time ||
+		(timecnt == 1 && attypes[0].at < min_time)) {
+		gmtoffs[0] = gmtoffs[type];
+		isdsts[0] = isdsts[type];
+		ttisstds[0] = ttisstds[type];
+		ttisgmts[0] = ttisgmts[type];
+		if (abbrinds[type] != 0)
+			(void) strcpy(chars, &chars[abbrinds[type]]);
+		abbrinds[0] = 0;
+		charcnt = strlen(chars) + 1;
+		typecnt = 1;
+		timecnt = 0;
+		type = 0;
+	}
+	if (timecnt >= TZ_MAX_TIMES) {
+		error(_("too many transitions?!"));
+		exit(EXIT_FAILURE);
+	}
+	attypes[timecnt].at = starttime;
+	attypes[timecnt].type = type;
+	++timecnt;
+}
+
+static int
+addtype(gmtoff, abbr, isdst, ttisstd, ttisgmt)
+const long		gmtoff;
+const char * const	abbr;
+const int		isdst;
+const int		ttisstd;
+const int		ttisgmt;
+{
+	register int	i, j;
+
+	if (isdst != TRUE && isdst != FALSE) {
+		error(_("internal error - addtype called with bad isdst"));
+		exit(EXIT_FAILURE);
+	}
+	if (ttisstd != TRUE && ttisstd != FALSE) {
+		error(_("internal error - addtype called with bad ttisstd"));
+		exit(EXIT_FAILURE);
+	}
+	if (ttisgmt != TRUE && ttisgmt != FALSE) {
+		error(_("internal error - addtype called with bad ttisgmt"));
+		exit(EXIT_FAILURE);
+	}
+	/*
+	** See if there's already an entry for this zone type.
+	** If so, just return its index.
+	*/
+	for (i = 0; i < typecnt; ++i) {
+		if (gmtoff == gmtoffs[i] && isdst == isdsts[i] &&
+			strcmp(abbr, &chars[abbrinds[i]]) == 0 &&
+			ttisstd == ttisstds[i] &&
+			ttisgmt == ttisgmts[i])
+				return i;
+	}
+	/*
+	** There isn't one; add a new one, unless there are already too
+	** many.
+	*/
+	if (typecnt >= TZ_MAX_TYPES) {
+		error(_("too many local time types"));
+		exit(EXIT_FAILURE);
+	}
+	if (! (-1L - 2147483647L <= gmtoff && gmtoff <= 2147483647L)) {
+		error(_("UTC offset out of range"));
+		exit(EXIT_FAILURE);
+	}
+	gmtoffs[i] = gmtoff;
+	isdsts[i] = isdst;
+	ttisstds[i] = ttisstd;
+	ttisgmts[i] = ttisgmt;
+
+	for (j = 0; j < charcnt; ++j)
+		if (strcmp(&chars[j], abbr) == 0)
+			break;
+	if (j == charcnt)
+		newabbr(abbr);
+	abbrinds[i] = j;
+	++typecnt;
+	return i;
+}
+
+static void
+leapadd(t, positive, rolling, count)
+const zic_t	t;
+const int	positive;
+const int	rolling;
+int		count;
+{
+	register int	i, j;
+
+	if (leapcnt + (positive ? count : 1) > TZ_MAX_LEAPS) {
+		error(_("too many leap seconds"));
+		exit(EXIT_FAILURE);
+	}
+	for (i = 0; i < leapcnt; ++i)
+		if (t <= trans[i]) {
+			if (t == trans[i]) {
+				error(_("repeated leap second moment"));
+				exit(EXIT_FAILURE);
+			}
+			break;
+		}
+	do {
+		for (j = leapcnt; j > i; --j) {
+			trans[j] = trans[j - 1];
+			corr[j] = corr[j - 1];
+			roll[j] = roll[j - 1];
+		}
+		trans[i] = t;
+		corr[i] = positive ? 1L : eitol(-count);
+		roll[i] = rolling;
+		++leapcnt;
+	} while (positive && --count != 0);
+}
+
+static void
+adjleap(void)
+{
+	register int	i;
+	register long	last = 0;
+
+	/*
+	** propagate leap seconds forward
+	*/
+	for (i = 0; i < leapcnt; ++i) {
+		trans[i] = tadd(trans[i], last);
+		last = corr[i] += last;
+	}
+}
+
+static int
+yearistype(year, type)
+const int		year;
+const char * const	type;
+{
+	static char *	buf;
+	int		result;
+
+	if (type == NULL || *type == '\0')
+		return TRUE;
+	buf = erealloc(buf, (int) (132 + strlen(yitcommand) + strlen(type)));
+	(void) sprintf(buf, "%s %d %s", yitcommand, year, type);
+	result = system(buf);
+	if (WIFEXITED(result)) switch (WEXITSTATUS(result)) {
+		case 0:
+			return TRUE;
+		case 1:
+			return FALSE;
+	}
+	error(_("wild result from command execution"));
+	warnx(_("command was '%s', result was %d"), buf, result);
+	for ( ; ; )
+		exit(EXIT_FAILURE);
+}
+
+static int
+lowerit(a)
+int	a;
+{
+	a = (unsigned char) a;
+	return (isascii(a) && isupper(a)) ? tolower(a) : a;
+}
+
+static int
+ciequal(ap, bp)		/* case-insensitive equality */
+register const char *	ap;
+register const char *	bp;
+{
+	while (lowerit(*ap) == lowerit(*bp++))
+		if (*ap++ == '\0')
+			return TRUE;
+	return FALSE;
+}
+
+static int
+itsabbr(abbr, word)
+register const char *	abbr;
+register const char *	word;
+{
+	if (lowerit(*abbr) != lowerit(*word))
+		return FALSE;
+	++word;
+	while (*++abbr != '\0')
+		do {
+			if (*word == '\0')
+				return FALSE;
+		} while (lowerit(*word++) != lowerit(*abbr));
+	return TRUE;
+}
+
+static const struct lookup *
+byword(word, table)
+register const char * const		word;
+register const struct lookup * const	table;
+{
+	register const struct lookup *	foundlp;
+	register const struct lookup *	lp;
+
+	if (word == NULL || table == NULL)
+		return NULL;
+	/*
+	** Look for exact match.
+	*/
+	for (lp = table; lp->l_word != NULL; ++lp)
+		if (ciequal(word, lp->l_word))
+			return lp;
+	/*
+	** Look for inexact match.
+	*/
+	foundlp = NULL;
+	for (lp = table; lp->l_word != NULL; ++lp)
+		if (itsabbr(word, lp->l_word)) {
+			if (foundlp == NULL)
+				foundlp = lp;
+			else	return NULL;	/* multiple inexact matches */
+		}
+	return foundlp;
+}
+
+static char **
+getfields(cp)
+register char *	cp;
+{
+	register char *		dp;
+	register char **	array;
+	register int		nsubs;
+
+	if (cp == NULL)
+		return NULL;
+	array = (char **) (void *)
+		emalloc((int) ((strlen(cp) + 1) * sizeof *array));
+	nsubs = 0;
+	for ( ; ; ) {
+		while (isascii((unsigned char) *cp) &&
+			isspace((unsigned char) *cp))
+				++cp;
+		if (*cp == '\0' || *cp == '#')
+			break;
+		array[nsubs++] = dp = cp;
+		do {
+			if ((*dp = *cp++) != '"')
+				++dp;
+			else while ((*dp = *cp++) != '"')
+				if (*dp != '\0')
+					++dp;
+				else {
+					error(_("odd number of quotation marks"));
+					exit(EXIT_FAILURE);
+				}
+		} while (*cp != '\0' && *cp != '#' &&
+			(!isascii(*cp) || !isspace((unsigned char) *cp)));
+		if (isascii(*cp) && isspace((unsigned char) *cp))
+			++cp;
+		*dp = '\0';
+	}
+	array[nsubs] = NULL;
+	return array;
+}
+
+static long
+oadd(t1, t2)
+const long	t1;
+const long	t2;
+{
+	register long	t;
+
+	t = t1 + t2;
+	if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
+		error(_("time overflow"));
+		exit(EXIT_FAILURE);
+	}
+	return t;
+}
+
+static zic_t
+tadd(t1, t2)
+const zic_t	t1;
+const long	t2;
+{
+	register zic_t	t;
+
+	if (t1 == max_time && t2 > 0)
+		return max_time;
+	if (t1 == min_time && t2 < 0)
+		return min_time;
+	t = t1 + t2;
+	if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
+		error(_("time overflow"));
+		exit(EXIT_FAILURE);
+	}
+	return t;
+}
+
+/*
+** Given a rule, and a year, compute the date - in seconds since January 1,
+** 1970, 00:00 LOCAL time - in that year that the rule refers to.
+*/
+
+static zic_t
+rpytime(rp, wantedy)
+register const struct rule * const	rp;
+register const int			wantedy;
+{
+	register int	y, m, i;
+	register long	dayoff;			/* with a nod to Margaret O. */
+	register zic_t	t;
+
+	if (wantedy == INT_MIN)
+		return min_time;
+	if (wantedy == INT_MAX)
+		return max_time;
+	dayoff = 0;
+	m = TM_JANUARY;
+	y = EPOCH_YEAR;
+	while (wantedy != y) {
+		if (wantedy > y) {
+			i = len_years[isleap(y)];
+			++y;
+		} else {
+			--y;
+			i = -len_years[isleap(y)];
+		}
+		dayoff = oadd(dayoff, eitol(i));
+	}
+	while (m != rp->r_month) {
+		i = len_months[isleap(y)][m];
+		dayoff = oadd(dayoff, eitol(i));
+		++m;
+	}
+	i = rp->r_dayofmonth;
+	if (m == TM_FEBRUARY && i == 29 && !isleap(y)) {
+		if (rp->r_dycode == DC_DOWLEQ)
+			--i;
+		else {
+			error(_("use of 2/29 in non leap-year"));
+			exit(EXIT_FAILURE);
+		}
+	}
+	--i;
+	dayoff = oadd(dayoff, eitol(i));
+	if (rp->r_dycode == DC_DOWGEQ || rp->r_dycode == DC_DOWLEQ) {
+		register long	wday;
+
+#define LDAYSPERWEEK	((long) DAYSPERWEEK)
+		wday = eitol(EPOCH_WDAY);
+		/*
+		** Don't trust mod of negative numbers.
+		*/
+		if (dayoff >= 0)
+			wday = (wday + dayoff) % LDAYSPERWEEK;
+		else {
+			wday -= ((-dayoff) % LDAYSPERWEEK);
+			if (wday < 0)
+				wday += LDAYSPERWEEK;
+		}
+		while (wday != eitol(rp->r_wday))
+			if (rp->r_dycode == DC_DOWGEQ) {
+				dayoff = oadd(dayoff, (long) 1);
+				if (++wday >= LDAYSPERWEEK)
+					wday = 0;
+				++i;
+			} else {
+				dayoff = oadd(dayoff, (long) -1);
+				if (--wday < 0)
+					wday = LDAYSPERWEEK - 1;
+				--i;
+			}
+		if (i < 0 || i >= len_months[isleap(y)][m]) {
+			if (noise)
+				warning(_("rule goes past start/end of month--\
+will not work with pre-2004 versions of zic"));
+		}
+	}
+	if (dayoff < min_time / SECSPERDAY)
+		return min_time;
+	if (dayoff > max_time / SECSPERDAY)
+		return max_time;
+	t = (zic_t) dayoff * SECSPERDAY;
+	return tadd(t, rp->r_tod);
+}
+
+static void
+newabbr(string)
+const char * const	string;
+{
+	register int	i;
+
+	if (strcmp(string, GRANDPARENTED) != 0) {
+		register const char *	cp;
+		register char *		wp;
+
+		/*
+		** Want one to ZIC_MAX_ABBR_LEN_WO_WARN alphabetics
+		** optionally followed by a + or - and a number from 1 to 14.
+		*/
+		cp = string;
+		wp = NULL;
+		while (isascii((unsigned char) *cp) &&
+			isalpha((unsigned char) *cp))
+				++cp;
+		if (cp - string == 0)
+wp = _("time zone abbreviation lacks alphabetic at start");
+		if (noise && cp - string > 3)
+wp = _("time zone abbreviation has more than 3 alphabetics");
+		if (cp - string > ZIC_MAX_ABBR_LEN_WO_WARN)
+wp = _("time zone abbreviation has too many alphabetics");
+		if (wp == NULL && (*cp == '+' || *cp == '-')) {
+			++cp;
+			if (isascii((unsigned char) *cp) &&
+				isdigit((unsigned char) *cp))
+					if (*cp++ == '1' &&
+						*cp >= '0' && *cp <= '4')
+							++cp;
+		}
+		if (*cp != '\0')
+wp = _("time zone abbreviation differs from POSIX standard");
+		if (wp != NULL) {
+			wp = ecpyalloc(wp);
+			wp = ecatalloc(wp, " (");
+			wp = ecatalloc(wp, string);
+			wp = ecatalloc(wp, ")");
+			warning(wp);
+			ifree(wp);
+		}
+	}
+	i = strlen(string) + 1;
+	if (charcnt + i > TZ_MAX_CHARS) {
+		error(_("too many, or too long, time zone abbreviations"));
+		exit(EXIT_FAILURE);
+	}
+	(void) strcpy(&chars[charcnt], string);
+	charcnt += eitol(i);
+}
+
+static int
+mkdirs(argname)
+char *		argname;
+{
+	register char *	name;
+	register char *	cp;
+
+	if (argname == NULL || *argname == '\0' || Dflag)
+		return 0;
+	cp = name = ecpyalloc(argname);
+	while ((cp = strchr(cp + 1, '/')) != 0) {
+		*cp = '\0';
+#ifndef unix
+		/*
+		** DOS drive specifier?
+		*/
+		if (isalpha((unsigned char) name[0]) &&
+			name[1] == ':' && name[2] == '\0') {
+				*cp = '/';
+				continue;
+		}
+#endif /* !defined unix */
+		if (!itsdir(name)) {
+			/*
+			** It doesn't seem to exist, so we try to create it.
+			** Creation may fail because of the directory being
+			** created by some other multiprocessor, so we get
+			** to do extra checking.
+			*/
+			if (mkdir(name, MKDIR_UMASK) != 0
+				&& (errno != EEXIST || !itsdir(name))) {
+				warn(_("can't create directory %s"), name);
+				ifree(name);
+				return -1;
+			}
+		}
+		*cp = '/';
+	}
+	ifree(name);
+	return 0;
+}
+
+static long
+eitol(i)
+const int	i;
+{
+	long	l;
+
+	l = i;
+	if ((i < 0 && l >= 0) || (i == 0 && l != 0) || (i > 0 && l <= 0))
+		errx(EXIT_FAILURE, _("%d did not sign extend correctly"), i);
+	return l;
+}
+
+#include <grp.h>
+#include <pwd.h>
+
+static void
+setgroup(flag, name)
+	gid_t *flag;
+	const char *name;
+{
+	struct group *gr;
+
+	if (*flag != (gid_t)-1)
+		errx(EXIT_FAILURE, _("multiple -g flags specified"));
+
+	gr = getgrnam(name);
+	if (gr == 0) {
+		char *ep;
+		unsigned long ul;
+
+		ul = strtoul(name, &ep, 10);
+		if (ul == (unsigned long)(gid_t)ul && *ep == '\0') {
+			*flag = ul;
+			return;
+		}
+		errx(EXIT_FAILURE, _("group `%s' not found"), name);
+	}
+	*flag = gr->gr_gid;
+}
+
+static void
+setuser(flag, name)
+	uid_t *flag;
+	const char *name;
+{
+	struct passwd *pw;
+
+	if (*flag != (gid_t)-1)
+		errx(EXIT_FAILURE, _("multiple -u flags specified"));
+
+	pw = getpwnam(name);
+	if (pw == 0) {
+		char *ep;
+		unsigned long ul;
+
+		ul = strtoul(name, &ep, 10);
+		if (ul == (unsigned long)(gid_t)ul && *ep == '\0') {
+			*flag = ul;
+			return;
+		}
+		errx(EXIT_FAILURE, _("user `%s' not found"), name);
+	}
+	*flag = pw->pw_uid;
+}
+
+/*
+** UNIX was a registered trademark of The Open Group in 2003.
+*/
diff --git a/contrib/tzcode/zic/zic/Makefile b/contrib/tzcode/zic/zic/Makefile
new file mode 100644
index 000000000000..02dc6e2d710e
--- /dev/null
+++ b/contrib/tzcode/zic/zic/Makefile
@@ -0,0 +1,16 @@
+# $FreeBSD$
+
+.PATH: ${.CURDIR}/..
+
+PROG=	zic
+MAN=	zic.8
+SRCS=	zic.c ialloc.c scheck.c
+
+CFLAGS+= -DTM_GMTOFF=tm_gmtoff -DTM_ZONE=tm_zone -DSTD_INSPIRED -DPCTS
+CFLAGS+= -DHAVE_LONG_DOUBLE -DTZDIR=\"/usr/share/zoneinfo\" -Demkdir=mkdir
+CFLAGS+= -DHAVE_STRERROR -DHAVE_UNISTD_H
+CFLAGS+= -I${.CURDIR}/.. -I${.CURDIR}/../../../lib/libc/stdtime
+
+WARNS?=	2
+
+.include <bsd.prog.mk>