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Update tzcode from 2022g to 2023c:
Release 2023c - 2023-03-28 12:42:14 -0700
Release 2023b - 2023-03-23 19:50:38 -0700
Release 2023a - 2023-03-22 12:39:33 -0700
Changes to code
You can now tell tzselect local time, to simplify later choices.
Select the 'time' option in its first prompt.
You can now compile with -DTZNAME_MAXIMUM=N to limit time zone
abbreviations to N bytes (default 255). The reference runtime
library now rejects POSIX-style TZ strings that contain longer
abbreviations, treating them as UTC. Previously the limit was
platform dependent and abbreviations were silently truncated to
16 bytes even when the limit was greater than 16.
The code by default is now designed for C99 or later. To build in
a C89 environment, compile with -DPORT_TO_C89. To support C89
callers of the tzcode library, compile with -DSUPPORT_C89. The
two new macros are transitional aids planned to be removed in a
future version, when C99 or later will be required.
The code now builds again on pre-C99 platforms, if you compile
with -DPORT_TO_C89. This fixes a bug introduced in 2022f.
On C23-compatible platforms tzcode no longer uses syntax like
'static [[noreturn]] void usage(void);'. Instead, it uses
'[[noreturn]] static void usage(void);' as strict C23 requires.
(Problem reported by Houge Langley.)
The code's functions now constrain their arguments with the C
'restrict' keyword consistently with their documentation.
This may allow future optimizations.
zdump again builds standalone with ckdadd and without setenv,
fixing a bug introduced in 2022g. (Problem reported by panic.)
leapseconds.awk can now process a leap seconds file that never
expires; this might be useful if leap seconds are discontinued.
Changes to commentary
tz-link.html has a new section "Coordinating with governments and
distributors". (Thanks to Neil Fuller for some of the text.)
To improve tzselect diagnostics, zone1970.tab's comments column is
now limited to countries that have multiple timezones.
Note that leap seconds are planned to be discontinued by 2035.
ctime.3: fix merge mistake The paragraphs about the *_r and *_z/rz functions belong at the end of the section (or somewhere like that), not affixed to the description of difftime in the middle of the list of functions.
Merge in 2022g:
Although tzcode still works with C89, bugs found in recent routine
maintenance indicate that bitrot has set in and that in practice
C89 is no longer used to build tzcode. As it is a maintenance
burden, support for C89 is planned to be removed soon. Instead,
please use compilers compatible with C99, C11, C17, or C23.
timegm, which tzcode implemented in 1989, will finally be
standardized 34 years later as part of C23, so timegm is now
supported even if STD_INSPIRED is not defined.
Fix bug in zdump's tzalloc emulation on hosts that lack tm_zone.
(Problem reported by Đoàn Trần Công Danh.)
Fix bug in zic on hosts where malloc(0) yields NULL on success.
(Problem reported by Tim McBrayer for AIX 6.1.)
Fix zic configuration to avoid linkage failures on some platforms.
(Problems reported by Gilmore Davidson and Igor Ivanov.)
Work around MS-Windows nmake incompatibility with POSIX.
(Problem reported by Manuela Friedrich.)
Port mktime and strftime to debugging platforms where accessing
uninitialized data has undefined behavior (strftime problem
reported by Robert Elz).
Check more carefully for unlikely integer overflows, preferring
C23 <stdckdint.h> to overflow checking by hand, as the latter has
had obscure bugs.
rephrase / clarify explanation of struct tm member normalization
ctime(3): fix unbalanced paren introduced in 1.40
ctime(3): add missing leading slash in a pathname
escape mathematical minus so it doesn't get rendered as a dash
Note normalizing behavior of mktime(3) using language from FreeBSD.
Welcome to tzcode-2022c Work around a bug in onetrueawk that broke commands like 'make traditional_tarballs' on FreeBSD, macOS, etc. (Problem reported by Deborah Goldsmith.) Add code to tzselect that uses experimental structured comments in zone1970.tab to clarify whether Zones like Africa/Abidjan and Europe/Istanbul cross continent or ocean boundaries. (Inspired by a problem reported by Peter Krefting.) Fix bug with 'zic -d /a/b/c' when /a is unwritable but the directory /a/b already exists. Remove zoneinfo2tdf.pl, as it was unused and triggered false malware alarms on some email servers.
Remove duplicate tm_isdst. Fixes PR misc/56419 for HEAD.
Mostly merge changes from HEAD upto 20200411
Pull up following revision(s) (requested by sevan in ticket #174): lib/libc/sys/chmod.2: revision 1.48 lib/libc/sys/stat.2: revision 1.59 lib/libc/sys/unlink.2: revision 1.30 lib/libc/sys/lseek.2: revision 1.25 lib/libc/sys/getuid.2: revision 1.18 lib/libc/sys/chown.2: revision 1.37 lib/libm/man/exp.3: revision 1.32 lib/libm/man/log.3: revision 1.7 lib/libc/sys/open.2: revision 1.60 lib/libc/stdio/fopen.3: revision 1.36 lib/libc/stdio/putc.3: revision 1.14 lib/libc/sys/mount.2: revision 1.51 share/man/man9/copy.9: revision 1.22 share/man/man9/uiomove.9: revision 1.20 lib/libc/sys/setuid.2: revision 1.23 lib/libc/sys/close.2: revision 1.18 sbin/init/init.8: revision 1.61 lib/libc/sys/write.2: revision 1.36 lib/libc/sys/read.2: revision 1.39 sbin/init/init.8: revision 1.62 lib/libc/sys/wait.2: revision 1.40 usr.bin/tty/tty.1: revision 1.10 lib/libc/sys/link.2: revision 1.33 usr.bin/du/du.1: revision 1.24 lib/libc/stdlib/exit.3: revision 1.17 usr.bin/su/su.1: revision 1.53 usr.bin/mail/mail.1: revision 1.66 lib/libc/sys/fork.2: revision 1.25 usr.bin/su/su.1: revision 1.54 usr.bin/mail/mail.1: revision 1.67 lib/libm/man/sin.3: revision 1.15 share/man/man9/intro.9: revision 1.26 share/man/man5/utmp.5: revision 1.17 lib/libc/compat-43/creat.3: revision 1.17 lib/libc/time/ctime.3: revision 1.61 lib/libcompat/4.1/stty.3: revision 1.10 usr.bin/dc/dc.1: revision 1.3 lib/libm/man/cos.3: revision 1.17 lib/libc/sys/chdir.2: revision 1.23 lib/libc/gen/exec.3: revision 1.30 lib/libc/gen/exec.3: revision 1.31 games/bcd/bcd.6: revision 1.18 games/bcd/bcd.6: revision 1.19 usr.bin/write/write.1: revision 1.7 usr.bin/wc/wc.1: revision 1.18 usr.bin/pr/pr.1: revision 1.24 usr.bin/who/who.1: revision 1.25 lib/libc/sys/mkdir.2: revision 1.30 lib/libc/stdio/getc.3: revision 1.13 usr.bin/sort/sort.1: revision 1.40 usr.bin/mesg/mesg.1: revision 1.11 share/man/man5/passwd.5: revision 1.34 sort was there since v1 https://www.bell-labs.com/usr/dmr/www/man61.pdf dc was in v1 https://www.bell-labs.com/usr/dmr/www/man12.pdf du was in v1 https://www.bell-labs.com/usr/dmr/www/man12.pdf mail was in v1 https://www.bell-labs.com/usr/dmr/www/man12.pdf mesg was in v1 https://www.bell-labs.com/usr/dmr/www/man12.pdf Document history https://www.bell-labs.com/usr/dmr/www/man13.pdf su was in v1 https://www.bell-labs.com/usr/dmr/www/man13.pdf Document history https://www.bell-labs.com/usr/dmr/www/man13.pdf Document history https://www.bell-labs.com/usr/dmr/www/man14.pdf Update URL write was in v1 https://www.bell-labs.com/usr/dmr/www/man14.pdf grammar passwd(5) was in v1 https://www.bell-labs.com/usr/dmr/www/man51.pdf utmp(5) was present in v1 https://www.bell-labs.com/usr/dmr/www/man51.pdf Earliest version of wtmp I could find was in v3 https://minnie.tuhs.org/cgi-bin/utree.pl?file=V3/man/man5/wtmp.5 Document history of chdir(2) https://www.bell-labs.com/usr/dmr/www/man21.pdf Document history of chmod(2) https://www.bell-labs.com/usr/dmr/www/man21.pdf Document history of chown(2) https://www.bell-labs.com/usr/dmr/www/man21.pdf Document history https://www.bell-labs.com/usr/dmr/www/man21.pdf create was present in v1 https://www.bell-labs.com/usr/dmr/www/man21.pdf Document history of exec() Move statement on execlpe() & execvpe() to HISTORY section. Document history https://www.bell-labs.com/usr/dmr/www/man21.pdf fork was present in v1 https://www.bell-labs.com/usr/dmr/www/man21.pdf stat() was present in v1 https://www.bell-labs.com/usr/dmr/www/man22.pdf document history of fstat() https://www.bell-labs.com/usr/dmr/www/man21.pdf getuid was present in v1 https://www.bell-labs.com/usr/dmr/www/man21.pdf Document history https://www.bell-labs.com/usr/dmr/www/man21.pdf Document history https://www.bell-labs.com/usr/dmr/www/man21.pdf stty & gtty were around since v1 https://www.bell-labs.com/usr/dmr/www/man21.pdf https://www.bell-labs.com/usr/dmr/www/man22.pdf mount & umount were present in v1 https://www.bell-labs.com/usr/dmr/www/man22.pdf Open was present in v1 https://www.bell-labs.com/usr/dmr/www/man22.pdf read was present in v1 https://www.bell-labs.com/usr/dmr/www/man22.pdf seek was present in v1 https://www.bell-labs.com/usr/dmr/www/man22.pdf setuid was in v1 https://www.bell-labs.com/usr/dmr/www/man22.pdf unlink was presen in v1 https://www.bell-labs.com/usr/dmr/www/man22.pdf wait was present in v1 https://www.bell-labs.com/usr/dmr/www/man22.pdf write was present in v1 https://www.bell-labs.com/usr/dmr/www/man22.pdf start documenting history exp was present in v1 https://www.bell-labs.com/usr/dmr/www/man31.pdf Start documenting history https://www.bell-labs.com/usr/dmr/www/man31.pdf Start documenting history https://www.bell-labs.com/usr/dmr/www/man31.pdf log appeared in v1 https://www.bell-labs.com/usr/dmr/www/man31.pdf putc & putw were in v1 https://www.bell-labs.com/usr/dmr/www/man31.pdf putchar was in v4 https://minie.tuhs.org/cgi-bin/utree.pl?file=V4/man/man3/putchr.3 Start documenting history https://www.bell-labs.com/usr/dmr/www/man31.pdf Document history. https://www.bell-labs.com/usr/dmr/www/man11.pdf Between v1 & v6 UNIX, bcd was rewritten in C, but I don't know if which version, hence I've skipped mentioning it. End sentence with a dot. Remove superfluous Pp. Remove superfluous Pp. Remove superfluous Ns. Remove superfluous Pp. fetch(9) -> ufetch(9) fetch(9) -> ufetch(9). Remove superfluous Pp. fetch(9) -> ufetch(9). Remove reference to unimplemented ppi(9).
start documenting history
Sync with HEAD
Sync with head
Update to 2018f:
Changes to code
zic now always generates TZif files where time type 0 is used for
timestamps before the first transition. This simplifies the
reading of TZif files and should not affect behavior of existing
TZif readers because the same set of time types is used; only
their internal indexes may have changed. This affects only the
legacy zones EST5EDT, CST6CDT, MST7MDT, PST8PDT, CET, MET, and
EET, which previously used nonzero types for these timestamps.
Because of the type 0 change, zic no longer outputs a dummy
transition at time -2**59 (before the Big Bang), as clients should
no longer need this to handle historical timestamps correctly.
This reverts a change introduced in 2013d and shrinks most TZif
files by a few bytes.
zic now supports negative time-of-day in Rule and Leap lines, e.g.,
"Rule X min max - Apr lastSun -6:00 1:00 -" means the transition
occurs at 18:00 on the Saturday before the last Sunday in April.
This behavior was documented in 2018a but the code did not
entirely match the documentation.
localtime.c no longer requires at least one time type in TZif
files that lack transitions or have a POSIX-style TZ string. This
future-proofs the code against possible future extensions to the
format that would allow TZif files with POSIX-style TZ strings and
without transitions or time types.
A read-access subscript error in localtime.c has been fixed.
It could occur only in TZif files with timecnt == 0, something that
does not happen in practice now but could happen in future versions.
localtime.c no longer ignores TZif POSIX-style TZ strings that
specify only standard time. Instead, these TZ strings now
override the default time type for timestamps after the last
transition (or for all time stamps if there are no transitions),
just as DST strings specifying DST have always done.
leapseconds.awk now outputs "#updated" and "#expires" comments,
and supports leap seconds at the ends of months other than June
and December. (Inspired by suggestions from Chris Woodbury.)
Changes to documentation
New restrictions: A Rule name must start with a character that
is neither an ASCII digit nor "-" nor "+", and an unquoted name
should not use characters in the set "!$%&'()*,/:;<=>?@[\]^`{|}~".
The latter restriction makes room for future extensions (a
possibility noted by Tom Lane).
tzfile.5 now documents what time types apply before the first and
after the last transition, if any.
Documentation now uses the spelling "timezone" for a TZ setting
that determines timestamp history, and "time zone" for a
geographic region currently sharing the same standard time.
The name "TZif" is now used for the tz binary data format.
tz-link.htm now mentions the A0 TimeZone Migration utilities.
(Thanks to Aldrin Martoq for the link.)
Sync with HEAD
Merge 2018e
Changes to code
zic now accepts subsecond precision in expressions like
00:19:32.13, which is approximately the legal time of the
Netherlands from 1835 to 1937. However, because it is
questionable whether the few recorded uses of non-integer offsets
had subsecond precision in practice, there are no plans for tzdata
to use this feature. (Thanks to Steve Allen for pointing out
the limitations of historical data in this area.)
The code is a bit more portable to MS-Windows. Installers can
compile with -DRESERVE_STD_EXT_IDS on MS-Windows platforms that
reserve identifiers like 'localtime'. (Thanks to Manuela
Friedrich).
Changes to documentation and commentary
theory.html now outlines tzdb's extensions to POSIX's model for
civil time, and has a section "POSIX features no longer needed"
that lists POSIX API components that are now vestigial.
(From suggestions by Steve Summit.) It also better distinguishes
time zones from tz regions. (From a suggestion by Guy Harris.)
Commentary is now more consistent about using the phrase "daylight
saving time", to match the C name tm_isdst. Daylight saving time
need not occur in summer, and need not have a positive offset from
standard time.
Commentary about historical transitions in Uruguay has been expanded
with links to many relevant legal documents.
(Thanks to Tim Parenti.)
Commentary now uses some non-ASCII characters with Unicode value
less than U+0100, as they can be useful and should work even with
older editors such as XEmacs.
Remove Tn. Remove trailing whitespace. Remove useless Pp.
Fix typos, as reported by Eitan Adler. Update dates.
Merge tzcode2018c [ changelog with changes to tzdata sections removed ]
Release 2018c - 2018-01-22 23:00:44 -0800
Changes to build procedure
The build procedure now works around mawk 1.3.3's lack of support
for character class expressions. (Problem reported by Ohyama.)
Release 2018b - 2018-01-17 23:24:48 -0800
Changes to build procedure
The distribution now contains the file 'pacificnew' again.
This file was inadvertantly omitted in the 2018a distribution.
(Problem reported by Matias Fonzo.)
Release 2018a - 2018-01-12 22:29:21 -0800
Changes to build procedure
The default installation locations have been changed to mostly
match Debian circa 2017, instead of being designed as an add-on to
4.3BSD circa 1986. This affects the Makefile macros TOPDIR,
TZDIR, MANDIR, and LIBDIR. New Makefile macros TZDEFAULT, USRDIR,
USRSHAREDIR, BINDIR, ZDUMPDIR, and ZICDIR let installers tailor
locations more precisely. (This responds to suggestions from
Brian Inglis and from Steve Summit.)
The default installation procedure no longer creates the
backward-compatibility link US/Pacific-New, which causes
confusion during user setup (e.g., see Debian bug 815200).
Use 'make BACKWARD="backward pacificnew"' to create the link
anyway, for now. Eventually we plan to remove the link entirely.
tzdata.zi now contains a version-number comment.
(Suggested by Tom Lane.)
The Makefile now quotes values like BACKWARD more carefully when
passing them to the shell. (Problem reported by Zefram.)
Builders no longer need to specify -DHAVE_SNPRINTF on platforms
that have snprintf and use pre-C99 compilers. (Problem reported
by Jon Skeet.)
Changes to code
zic has a new option -t FILE that specifies the location of the
file that determines local time when TZ is unset. The default for
this location can be configured via the new TZDEFAULT makefile
macro, which defaults to /etc/localtime.
Diagnostics and commentary now distinguish UT from UTC more
carefully; see theory.html for more information about UT vs UTC.
zic has been ported to GCC 8's -Wstringop-truncation option.
(Problem reported by Martin Sebor.)
Changes to documentation and commentary
The zic man page now documents the longstanding behavior that
times and years can be out of the usual range, with negative times
counting backwards from midnight and with year 0 preceding year 1.
(Problem reported by Michael Deckers.)
The theory.html file now mentions the POSIX limit of six chars
per abbreviation, and lists alphabetic abbreviations used.
The files tz-art.htm and tz-link.htm have been renamed to
tz-art.html and tz-link.html, respectively, for consistency with
other file names and to simplify web server configuration.
Welcome to 2017c:
zic and the reference runtime now reject multiple leap seconds
within 28 days of each other, or leap seconds before the Epoch.
As a result, support for double leap seconds, which was
obsolescent and undocumented, has been removed. Double leap
seconds were an error in the C89 standard; they have never existed
in civil timekeeping. (Thanks to Robert Elz and Bradley White for
noticing glitches in the code that uncovered this problem.)
zic now warns about use of the obsolescent and undocumented -y
option, and about use of the obsolescent TYPE field of Rule lines.
zic now allows unambiguous abbreviations like "Sa" and "Su" for
weekdays; formerly it rejected them due to a bug. Conversely, zic
no longer considers non-prefixes to be abbreviations; for example,
it no longer accepts "lF" as an abbreviation for "lastFriday".
Also, zic warns about the undocumented usage with a "last-"
prefix, e.g., "last-Fri".
Similarly, zic now accepts the unambiguous abbreviation "L" for
"Link" in ordinary context and for "Leap" in leap-second context.
Conversely, zic no longer accepts non-prefixes such as "La" as
abbreviations for words like "Leap".
zic no longer accepts leap second lines in ordinary input, or
ordinary lines in leap second input. Formerly, zic sometimes
warned about this undocumented usage and handled it incorrectly.
The new macro HAVE_TZNAME governs whether the tzname external
variable is exported, instead of USG_COMPAT. USG_COMPAT now
governs only the external variables "timezone" and "daylight".
This change is needed because the three variables are not in the
same category: although POSIX requires tzname, it specifies the
other two variables as optional. Also, USG_COMPAT is now 1 or 0:
if not defined, the code attempts to guess it from other macros.
localtime.c and difftime.c no longer require stdio.h, and .c files
other than zic.c no longer require sys/wait.h.
zdump.c no longer assumes snprintf. (Reported by Jonathan Leffler.)
Calculation of time_t extrema works around a bug in GCC 4.8.4
(Reported by Stan Shebs and Joseph Myers.)
zic.c no longer mistranslates formats of line numbers in non-English
locales. (Problem reported by Benno Schulenberg.)
Several minor changes have been made to the code to make it a
bit easier to port to MS-Windows and Solaris. (Thanks to Kees
Dekker for reporting the problems.)
Changes to documentation and commentary
The two new files 'theory.html' and 'calendars' contain the
contents of the removed file 'Theory'. The goal is to document
tzdb theory more accessibly.
The zic man page now documents abbreviation rules.
tz-link.htm now covers how to apply tzdata changes to clients.
(Thanks to Jorge Fábregas for the AIX link.) It also mentions MySQL.
The leap-seconds.list URL has been updated to something that is
more reliable for tzdb. (Thanks to Tim Parenti and Brian Inglis.)
Sync with HEAD. (Note that most of these changes are simply $NetBSD$ tag issues.)
Fix asctime_r prototype.
Remove trailing comma at the end of the last .Nm entry in the NAME section
Grammar fixes at few places Also, don't use .D1 inside .Bd (mandoc -Tlint was complaining) Remove whitespace at the end of a sentence
Pull up the following revisions via patch, requested by apb in ticket #453: doc/3RDPARTY up to 1.1195 usr.sbin/zdump/Makefile up to 1.9 usr.sbin/zic/Makefile up to 1.15 lib/libc/time/Makefile up to 1.25 lib/libc/time/Makefile.inc up to 1.21 lib/libc/time/NEWS up to 1.8 lib/libc/time/README up to 1.9 lib/libc/time/Theory up to 1.16 lib/libc/time/asctime.c up to 1.20 lib/libc/time/checktab.awk up to 1.8 lib/libc/time/ctime.3 up to 1.51 lib/libc/time/getdate.c up to 1.3 lib/libc/time/localtime.c up to 1.92 lib/libc/time/private.h up to 1.38 lib/libc/time/strftime.c up to 1.33 lib/libc/time/time2posix.3 up to 1.19 lib/libc/time/tz-art.htm up to 1.8 lib/libc/time/tz-link.htm up to 1.20 lib/libc/time/tzfile.5 up to 1.22 lib/libc/time/tzfile.h up to 1.16 lib/libc/time/tzselect.8 up to 1.6 lib/libc/time/tzselect.ksh up to 1.12 lib/libc/time/tzset.3 up to 1.31 lib/libc/time/zdump.8 up to 1.14 lib/libc/time/zdump.c up to 1.40 lib/libc/time/zic.8 up to 1.24 lib/libc/time/zic.c up to 1.52 Update tzcode from 2014e to 2014j.
Sync with tzcode2014h
Rebase to HEAD as of a few days ago.
merge tzcode2014f via patch
sync with head.
for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.
this commit was splitted into small chunks to avoid
a limitation of cvs. ("Protocol error: too many arguments")
update from tzcode 2013e to tzcode2013i
i:
The compile-time flag NOSOLAR has been removed, as nowadays the
benefit of slightly shrinking runtime table size is outweighed by the
cost of disallowing potential future updates that exceed old limits.
h:
Fix localtime overflow bugs with 32-bit unsigned time_t.
zdump no longer assumes sscanf returns maximal values on overflow.
g:
'zic' now runs on platforms that lack both hard links and symlinks.
(Thanks to Theo Veenker for reporting the problem, for MinGW.)
Also, fix some bugs on platforms that lack hard links but have symlinks.
'zic -v' again warns that Asia/Tehran has no POSIX environment variable
to predict the far future, fixing a bug introduced in 2013e.
f:
The types of the global variables 'timezone' and 'altzone' (if present)
have been changed back to 'long'. This is required for 'timezone'
by POSIX, and for 'altzone' by common practice, e.g., Solaris 11.
These variables were originally 'long' in the tz code, but were
mistakenly changed to 'time_t' in 1987; nobody reported the
incompatibility until now. The difference matters on x32, where
'long' is 32 bits and 'time_t' is 64. (Thanks to Elliott Hughes.)
Welcome to tzcode 2013e:
Changes affecting API
The 'zic' command now outputs a dummy transition when far-future
data can't be summarized using a TZ string, and uses a 402-year
window rather than a 400-year window. For the current data, this
affects only the Asia/Tehran file. It does not affect any of the
time stamps that this file represents, so zdump outputs the same
information as before. (Thanks to Andrew Main (Zefram).)
The 'date' command has a new '-r' option, which lets you specify
the integer time to display, a la FreeBSD.
The 'tzselect' command has two new options '-c' and '-n', which lets you
select a zone based on latitude and longitude.
The 'zic' command's '-v' option now warns about constructs that
require the new version-3 binary file format. (Thanks to Arthur
David Olson for the suggestion.)
Support for floating-point time_t has been removed.
It was always dicey, and POSIX no longer requires it.
(Thanks to Eric Blake for suggesting to the POSIX committee to
remove it, and thanks to Alan Barrett, Clive D.W. Feather, Andy
Heninger, Arthur David Olson, and Alois Treindl, for reporting
bugs and elucidating some of the corners of the old floating-point
implementation.)
The signatures of 'offtime', 'timeoff', and 'gtime' have been
changed back to the old practice of using 'long' to represent UT
offsets. This had been inadvertently and mistakenly changed to
'int_fast32_t'. (Thanks to Christos Zoulos.)
The code avoids undefined behavior on integer overflow in some
more places, including gmtime, localtime, mktime and zdump.
Changes affecting the zdump utility
zdump now outputs "UT" when referring to Universal Time, not "UTC".
"UTC" does not make sense for time stamps that predate the introduction
of UTC, whereas "UT", a more-generic term, does. (Thanks to Steve Allen
for clarifying UT vs UTC.)
Data changes affecting behavior of tzselect and similar programs
Country code BQ is now called the more-common name "Caribbean Netherlands"
rather than the more-official "Bonaire, St Eustatius & Saba".
Remove from zone.tab the names America/Montreal, America/Shiprock,
and Antarctica/South_Pole, as they are equivalent to existing
same-country-code zones for post-1970 time stamps. The data for
these names are unchanged, so the names continue to work as before.
Changes affecting code internals
zic -c now runs way faster on 64-bit hosts when given large numbers.
zic now uses vfprintf to avoid allocating and freeing some memory.
tzselect now computes the list of continents from the data,
rather than have it hard-coded.
Minor changes pacify GCC 4.7.3 and GCC 4.8.1.
Changes affecting the build procedure
The 'leapseconds' file is now generated automatically from a
new file 'leap-seconds.list', which is a copy of
<ftp://time.nist.gov/pub/leap-seconds.list>.
A new source file 'leapseconds.awk' implements this.
The goal is simplification of the future maintenance of 'leapseconds'.
When building the 'posix' or 'right' subdirectories, if the
subdirectory would be a copy of the default subdirectory, it is
now made a symbolic link if that is supported. This saves about
2 MB of file system space.
The links America/Shiprock and Antarctica/South_Pole have been
moved to the 'backward' file. This affects only nondefault builds
that omit 'backward'.
Changes affecting documentation and commentary
Changes to the 'tzfile' man page
It now mentions that the binary file format may be extended in
future versions by appending data.
It now refers to the 'zdump' and 'zic' man pages.
Changes to the 'zic' man page
It lists conditions that elicit a warning with '-v'.
It says that the behavior is unspecified when duplicate names
are given, or if the source of one link is the target of another.
Its examples are updated to match the latest data.
The definition of white space has been clarified slightly.
(Thanks to Michael Deckers.)
Changes to the 'Theory' file
There is a new section about the accuracy of the tz database,
describing the many ways that errors can creep in, and
explaining why so many of the pre-1970 time stamps are wrong or
misleading (thanks to Steve Allen, Lester Caine, and Garrett
Wollman for discussions that contributed to this).
The 'Theory' file describes LMT better (this follows a
suggestion by Guy Harris).
It refers to the 2013 edition of POSIX rather than the 2004 edition.
It's mentioned that excluding 'backward' should not affect the
other data, and it suggests at least one zone.tab name per
inhabited country (thanks to Stephen Colebourne).
Some longstanding restrictions on names are documented, e.g.,
'America/New_York' precludes 'America/New_York/Bronx'.
It gives more reasons for the 1970 cutoff.
It now mentions which time_t variants are supported, such as
signed integer time_t. (Thanks to Paul Goyette for reporting
typos in an experimental version of this change.)
(Thanks to Philip Newton for correcting typos in these changes.)
Documentation and commentary is more careful to distinguish UT in
general from UTC in particular. (Thanks to Steve Allen.)
Add a better source for the Zurich 1894 transition.
(Thanks to Pierre-Yves Berger.)
Update shapefile citations in tz-link.htm. (Thanks to Guy Harris.)
resync with head
sync with head
Document the fact that ctime_rz, localtime_rz, and mktime_z, accept a NULL timezone_t pointer as a reference to UTC, and the fact that tzalloc accepts a NULL zone name.
sync with head
document where tm_zone comes from in the _z calls.
Use double quotes to prevent multiple adjacent spaces from being squashed to a single space on output.
Change mktime*(3) so that it does not always return EOVERFLOW when it cannot perform the conversion, but returns EINVAL when the time requested would fall in the DST gap, or is not representable in the timezone requested, and document this.
Add code (not enabled) that allows mktime() to return a value for times in the DST gap when tm_isdst == -1, like glibc does. Document both behaviors.
don't indent this bullet list either, it is not required (the text is indented anyway)
Catchup with rmind-uvmplock merge.
Do not indent RETURN VALUES section (which was ignored because of missing dash).
Split out FUNCTIONS to make this tolerable to read. Also improve readability with lists. Describe the functions in the order of appearance in SYNOPSIS. Use CAVEATS instead of NOTES. Remove "man page spam". Etc.
Move some of the discussion from the messy ctime(3) to tm(3).
Sync with HEAD
Redo Vt macro fixes (from r1.35) which were lost.
Sort ERRORS. Fix a typo. Readd macro usage lost in previous. Remove trailing whitespace.
Provide a re-entrant and thread-safe set of timezone API's that don't require locking and can operate on user-specified timezones as opposed to having to alter the environment to change a timezone. This work was presented to the tzcode folks and it was generally accepted, but there seems to be a lot of inertia.
Convert a few macros to Vt (variable type).
Fix a typo and remove trailing whitespace.
markup improvements, document ctype_r, time_t is not a "long integer"
Remove repeated text "After filling..." XXX Someone else can decide whether we should refer to "U.S.A." or to XXX "the United States" in the parenthetical.
Remove trailing whitespace. Use Fn when referencing functions. Sort sections. New sentence, new line.
According to TOG:
- asctime{,_r}, ctime{,_r} may return NULL; document that, and avoid coredumps.
- gmtime{,_r}, localtime{,_r} may return NULL and set EOVERFLOW, document and
set errno.
- when mktime returns (time_t)-1, make it set EOVERFLOW and document it.
XXX: Should be pulled up to 5.x
Try to fixup the mess of mdoc(7)/man(7) mixture as created by the merge.
Import tzcode2009k. - now understands 64bit time_t and 64bit data in timezone files. - localtime(), gmtime(), asctime() and ctime() may now fail with a NULL result if time_t cannot be represented by struct tm.
import tzcode2009k
Use .In header.h instead of .Fd #include \*[Lt]header.h\*[Gt] Much easier to read and write, and supported by groff for ages. Okayed by ross.
Catch up to -current.
New sentence, new line. From Robert Elz.
Catch up to -current.
Catch up to -current.
Generate <>& symbolically.
Catch up to -current.
Sort SEE ALSO.
mdoc'ify. With a tip of the hat to kleink.
Sprinkle some restrict.
add forgotten argument name to actime_r() prototype
Pull up rev. 1.18 into 1.5 branch, OK'd by thorpej: > Improve description for tm_year and some other fields. > May prevent PRs like 10521 in the future.
* Use standard interval notation for struct tm members. * Document tm_isdst as DST flag, not summer time.
Pull up rev. 1.19 (approved by thorpej): Note that localtime_r() does not imply tzset().
Note that localtime_r() does not imply tzset(); inspired by a conversation with Hal Murray in the trail of PR lib/10282.
Improve description for tm_year and some other fields. May prevent PRs like 10521 in the future.
Sync w/ netbsd-1-5-base.
Pasto in previous.
Move orphaned information to tzset(3).
Add documentation for asctime_r(), ctime_r(), gmtime_r() and localtime_r().
Correct doc for tm.tm_sec to document range 0..61, not 0..60 (strptime(3) legally assigns 61 here if specified by the user)
Add standards conformance statement.
Sync with tzcode1997e
import tzcode1997e
The protoypes for ctime() and tzset() are in <time.h>. Move #include <time.h> to the start of the SYNOPSIS so that people won't need to search them.
Changed manpages to reflect fact that localtime file is in /etc
sync with tzcode96c
import tzcode96c
sync with tzcode96a
import tzcode96a
merge in changes from 1.1 release branch
Fix xrefs: time(2) -> time(3), newtzset(3) -> tzset(3)
/usr/local/etc/zoneinfo -> /usr/share/zoneinfo; PR #1398
Update to tzcode95c.
Removed "new" from references to newctime(3). Removed -lz from SYNOPSIS.
file ctime.3 was added on branch ivory_soap on 1995-03-10 18:21:25 +0000
Removed "new" from references to newctime(3). Removed -lz from SYNOPSIS.
Change long to time_t as appropriate. Add const qualifier to function argument descriptions as appropriate.
Get rid of NEW (as in NEWCTIME and NEWTZSET).
Add NetBSD ID's
ctime.3 from TZCODE95B, renamed from newctime.3.
Initial revision