Changes in README

559c967b97ccdff8e3c18e586c07468b3d4afdbb - Import tzcode 2023d:

Sat, 23 Dec 2023 20:48:38 +0000

Import tzcode 2023d: localtime.c no longer mishandles TZif files that contain a single transition into a DST regime. Previously, it incorrectly assumed DST was in effect before the transition too. (Thanks to Alois Treindl for debugging help.) localtime.c's timeoff no longer collides with OpenBSD 7.4. The C code now uses _Generic only if __STDC_VERSION__ says the compiler is C11 or later. tzselect now optionally reads zonenow.tab, to simplify when configuring only for timestamps dated from now on. tzselect no longer creates temporary files. tzselect no longer mishandles the following: Spaces and most other special characters in BUGEMAIL, PACKAGE, TZDIR, and VERSION. TZ strings when using mawk 1.4.3, which mishandles regular expressions of the form /X{2,}/. ISO 6709 coordinates when using an awk that lacks the GNU extension of newlines in -v option-arguments. Non UTF-8 locales when using an iconv command that lacks the GNU //TRANSLIT extension. zic no longer mishandles data for Palestine after the year 2075. Previously, it incorrectly omitted post-2075 transitions that are predicted for just before and just after Ramadan. (Thanks to Ken Murchison for debugging help.) zic now works again on Linux 2.6.16 and 2.6.17 (2006). List of files: /netbsd-src/lib/libc/time/README

7328cbb47c0d0fbf85fd573bcce87399c44edc92 - Merge tzcode2020b (except we keep tzsetwall(3) for now for compatibility,

Fri, 09 Oct 2020 18:38:48 +0000

Merge tzcode2020b (except we keep tzsetwall(3) for now for compatibility,and we were "slim" already)Support for zic's long-obsolete '-y YEARISTYPE' option has beenremoved and, with it, so has support for the TYPE field in Rulelines, which is now reserved for compatibility with earlier zic.These features were previously deprecated in release 2015f.(Thanks to Tim Parenti.)zic now defaults to '-b slim' instead of to '-b fat'.zic's new '-l -' and '-p -' options uninstall any existinglocaltime and posixrules files, respectively.The undocumented and ineffective tzsetwall function has beenremoved. List of files: /netbsd-src/lib/libc/time/README

91e14238d8732f2262d9ac1f251a18ffd78fe2b1 - merge 2019a

Thu, 04 Apr 2019 18:18:31 +0000

merge 2019a Changes to code zic now has an -r option to limit the time range of output data. For example, 'zic -r @1000000000' limits the output data to timestamps starting 1000000000 seconds after the Epoch. This helps shrink output size and can be useful for applications not needing the full timestamp history, such as TZDIST truncation; see Internet RFC 8536 section 5.1. (Inspired by a feature request from Christopher Wong, helped along by bug reports from Wong and from Tim Parenti.) Changes to documentation Mention Internet RFC 8536 (February 2019), which documents TZif. tz-link.html now cites tzdata-meta . List of files: /netbsd-src/lib/libc/time/README

b2b04f7e8a131319b7059641dfddecd3e0e9ab40 - Update to 2018f:

Fri, 19 Oct 2018 23:05:35 +0000

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.) List of files: /netbsd-src/lib/libc/time/README

cf47161082bf03ed0113f86cd1f110b4b2866aa9 - Merge tzcode2018c [ changelog with changes to tzdata sections removed ]

Thu, 25 Jan 2018 22:48:42 +0000

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. List of files: /netbsd-src/lib/libc/time/README

20e5bd1924b7eda89cc68214bea437e4243827b0 - merge 2017a

Sat, 11 Mar 2017 18:23:14 +0000

merge 2017a List of files: /netbsd-src/lib/libc/time/README

9551d334d2110f76261163121b4d658c9a6fe0c8 - merge tzcode2016g

Fri, 07 Oct 2016 15:29:42 +0000

merge tzcode2016g List of files: /netbsd-src/lib/libc/time/README

e4c8546a4ca727bdaf7244fd2d831646b3e696dd - Sync with 2016b

Tue, 15 Mar 2016 15:16:01 +0000

Sync with 2016b List of files: /netbsd-src/lib/libc/time/README

1f6103b1793c8849f3a9ed017512de8b0a77e070 - Sync with tzcode2014h

Tue, 07 Oct 2014 21:51:03 +0000

Sync with tzcode2014h List of files: /netbsd-src/lib/libc/time/README

002951760fa56806f8bab1f6c196444966b695d9 - update from tzcode 2013e to tzcode2013i

Thu, 26 Dec 2013 18:34:28 +0000

update from tzcode 2013e to tzcode2013ii: 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.) List of files: /netbsd-src/lib/libc/time/README

b6be6961a75120d375bac8b29ede1d3ee3c8ae7b - merge 2012e

Thu, 09 Aug 2012 12:38:25 +0000

merge 2012e List of files: /netbsd-src/lib/libc/time/README

86162a51cc90f4129d10b7466592fefe8d2bc1ff - Import tzcode2009k.

Thu, 31 Dec 2009 22:49:15 +0000

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. List of files: /netbsd-src/lib/libc/time/README

4521dc7de475753ef28c798aebe956d0ff73f975 - Merge tzcode2002b.

Tue, 29 Jan 2002 12:40:33 +0000

Merge tzcode2002b. List of files: /netbsd-src/lib/libc/time/README

c9f85190405ff865c002c4a8b39bb48eb90c829b - sync with tzcode1998b

Thu, 22 Jan 1998 07:17:18 +0000

sync with tzcode1998b List of files: /netbsd-src/lib/libc/time/README

1c631d03ad4ffdd2add5155f92aa8506d4fdebee - sync with tzcode1998a

Thu, 22 Jan 1998 07:06:56 +0000

sync with tzcode1998a List of files: /netbsd-src/lib/libc/time/README

b51ed80fd587a49787f7f3850a23e090b555ad90 - RCS Id Police.

Fri, 09 Jan 1998 04:11:49 +0000

RCS Id Police. List of files: /netbsd-src/lib/libc/time/README

5bd15d6468dac28a2ee1d6c6a8caea7766fab5a4 - import tzcode1997g

Fri, 05 Sep 1997 02:07:13 +0000

import tzcode1997g List of files: /netbsd-src/lib/libc/time/README

ef16fd639e7758063f2bb30828701c7065246ab9 - import tzcode1997e

Wed, 18 Jun 1997 00:41:05 +0000

import tzcode1997e List of files: /netbsd-src/lib/libc/time/README

3a34b570e92e1090056fb9d3c4cf47fa16275354 - Strictly speaking, these files probably don't belong in the libc sources.

Fri, 10 Mar 1995 07:08:14 +0000

Strictly speaking, these files probably don't belong in the libc sources.On the other hand, it makes it easier to track the master tzcode sourcesif we try to keep the distribution together as much as possible.The zic and zdump commands will access the files the need with make's.PATH facility. List of files: /netbsd-src/lib/libc/time/README