- tz - lists.iana.org

tzdist and tz@iana
by Alexander Belopolsky Sept. 8, 2016

Sept. 8, 2016

On Wed, Sep 7, 2016 at 4:04 AM, Jon Skeet <skeet(a)pobox.com> wrote: > (Then there's tzdist of course, but that's a whole other matter...) I have been looking at RFC 7808 (aka tzdist) and I wonder what is the relationship between the proposed distribution standard and this project. While RFC 7808 mentions "Olson" as a possible "primary-source", it does not look like the proposed JSON format is capable of carrying all information provided by Olson raw files. The distribution format looks like a text variant of the binary zoneinfo files, but it is not clear whether or not the distributed data includes timezone abbreviations. Are there any plans to support the tzdist format in tzcode? Will IANA run its own "Time Zone Data Server"?

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Rangoon to Yangon
by David Massoud Sept. 8, 2016

Sept. 8, 2016

Myanmar's former capital and most populous city is currently known as Yangon. In 1989 Burma was renamed Myanmar (which you have reflected in the Asia data file). At the same time, Rangoon was renamed Yangon, which is currently not reflected in the codebase. http://www.forbestravelguide.com/yangon-myanmar/whats-the-difference-betwee… . -- David Massoud http://lnked.in/DavidMassoud

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Turkey to keep permanent DST
by Even Scharning Sept. 8, 2016

Sept. 8, 2016

Turkey will stay on DST, canceling October's transition back to UTC +2 standard time, according to Hürriyet, Turkey's "leading news source". http://www.hurriyet.com.tr/kis-saati-uygulamasi-yururlukten-kaldirildi-4021… Time in Turkey: http://time.is/Turkey Even Scharning Time.is - exact time for any time zone http://time.is/

3 4

Google search results displaying wrong time for Egypt
by Andrew Paprocki Sept. 7, 2016

Sept. 7, 2016

If you search for "current time in Egypt" (at least for me in NYC), it will display a UTC+3 time as if DST was applied (tzdata2016f not being used). In case there are any Googlers on the list want to raise awareness internally... -Andrew

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[PROPOSED PATCH 1/5] zic now omits some mkdir and stat system calls
by Paul Eggert Sept. 6, 2016

Sept. 6, 2016

* NEWS: Document this. * zic.c (mkdirs): Do not mkdir a root directory. Avoid unnecessary stat call. --- NEWS | 2 ++ zic.c | 24 +++++++++++++----------- 2 files changed, 15 insertions(+), 11 deletions(-) diff --git a/NEWS b/NEWS index f5a0b13..192deb7 100644 --- a/NEWS +++ b/NEWS @@ -55,6 +55,8 @@ Unreleased, experimental changes stamps on the reference platform. (Thanks to Alexander Belopolsky for reporting the bug and suggesting a way forward.) + zic now avoids some unnecessary mkdir and stat system calls. + zdump has a new -i option to generate transitions in a more-compact but still human-readable format. This option is experimental, and the output format may change in future versions. diff --git a/zic.c b/zic.c index b8bd0a6..5ff78b4 100644 --- a/zic.c +++ b/zic.c @@ -3027,25 +3027,27 @@ mkdirs(char *argname) if (argname == NULL || *argname == '\0') return true; cp = name = ecpyalloc(argname); - while ((cp = strchr(cp + 1, '/')) != 0) { - *cp = '\0'; + + /* Do not mkdir a root directory, as it must exist. */ #ifdef HAVE_DOS_FILE_NAMES - /* - ** DOS drive specifier? - */ - if (is_alpha(name[0]) && name[1] == ':' && name[2] == '\0') { - *cp = '/'; - continue; - } + if (is_alpha(name[0]) && name[1] == ':') + cp += 2; #endif + while (*cp == '/') + cp++; + + for (; (cp = strchr(cp, '/')) != 0; cp++) { + *cp = '\0'; /* ** Try to create it. It's OK if creation fails because ** the directory already exists, perhaps because some - ** other process just created it. + ** other process just created it. For simplicity do + ** not check first whether it already exists, as that + ** is checked anyway if the mkdir fails. */ if (mkdir(name, MKDIR_UMASK) != 0) { int err = errno; - if (itsdir(name) <= 0) { + if (err != EEXIST && itsdir(name) <= 0) { char const *e = strerror(err); warning(_("%s: Can't create directory" " %s: %s"), -- 2.7.4

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[PROPOSED PATCH 1/3] Call the new tarball experimental
by Paul Eggert Sept. 6, 2016

Sept. 6, 2016

* Makefile (tzdata$(VERSION).tar.gz): Omit $(TZS). * NEWS: Call the new format experimental, and say it has to2050.tzs. Do not imply a time limit for the old format. * README, tz-link.htm: Bring back traditional two-tarball recipe. * tz-how-to.html: Defer to tz-link.htm for tarball link. * tz-link.htm: Update some URLs. --- Makefile | 2 +- NEWS | 33 ++++++++++++++++----------------- README | 11 +++++++++++ tz-how-to.html | 3 +-- tz-link.htm | 52 ++++++++++++++++++++++++++++------------------------ 5 files changed, 57 insertions(+), 44 deletions(-) diff --git a/Makefile b/Makefile index 90363e9..31a2ec5 100644 --- a/Makefile +++ b/Makefile @@ -683,7 +683,7 @@ tzcode$(VERSION).tar.gz: set-timestamps.out tzdata$(VERSION).tar.gz: set-timestamps.out LC_ALL=C && export LC_ALL && \ - tar $(TARFLAGS) -cf - $(COMMON) $(DATA) $(MISC) $(TZS) | \ + tar $(TARFLAGS) -cf - $(COMMON) $(DATA) $(MISC) | \ gzip $(GZIPFLAGS) > $@ tzdb-$(VERSION).tar.lz: set-timestamps.out diff --git a/NEWS b/NEWS index e61a992..6cbdbd7 100644 --- a/NEWS +++ b/NEWS @@ -63,20 +63,18 @@ Unreleased, experimental changes Changes to build procedure - The tz distribution has a new file to2050.tzs that contains what - should be the output of 'zdump -i -c 2050' on primary zones. - 'make check' now checks that zdump generates this output. - - A new distribution format is available in the tarball - tzdb-VERSION.tar.lz and the signature tzdb-VERSION.tar.lz.asc. - The new tarball has the contents of tzcodeVERSION.tar.gz and - tzdataVERSION.tar.gz, in a single top-level directory 'tzdb' with - all other files under this directory, as is typical for software - distributions. The new format is intended to replace the old - tarball pair. The old format will continue to be distributed for - a while. The new format uses lzip compression, which is smaller - than gzip; see <http://www.nongnu.org/lzip/lzip.html>. - (Thanks to Antonio Diaz Diaz and Oscar van Vlijmen for comments.) + An experimental distribution format is available in the tarball + tzdb-VERSION.tar.lz with signature file tzdb-VERSION.tar.lz.asc. + It unpacks to a top-level directory containing the code and data + of the traditional two-tarball format, along with extra data that + may be useful. The traditional format will continue to be + distributed. (Thanks to Antonio Diaz Diaz, Oscar van Vlijmen, and + many others for comments about the experimental format.) + + The experimental distribution contains a file to2050.tzs that + contains what should be the output of 'zdump -i -c 2050' on + primary zones. If this file is available, 'make check' now checks + that zdump generates this output. 'make check_web' now works on Fedora-like distributions. @@ -3613,14 +3611,15 @@ This file contains copies of the part of each release announcement that talks about the changes in that release. The text has been adapted and reformatted for the purposes of this file. -Typically a release R consists of a pair of tarball files, +Traditionally a release R consists of a pair of tarball files, tzcodeR.tar.gz and tzdataR.tar.gz. However, some releases (e.g., code2010a, data2012c) consist of just one or the other tarball, and a few (e.g., code2012c-data2012d) have tarballs with mixed version -numbers. +numbers. Recent releases also come in an experimental format +consisting of a single tarball tzdb-R.tar.lz with extra data. Release time stamps are taken from the release's commit (for newer, -git releases), from the newest file in the tarball (for older +Git-based releases), from the newest file in the tarball (for older releases, where this info is available) or from the email announcing the release (if all else fails; these are marked with a time zone of -0000 and an "is missing!" comment). diff --git a/README b/README index ba0b790..8a09aa2 100644 --- a/README +++ b/README @@ -13,6 +13,17 @@ and daylight-saving rules. Here is a recipe for acquiring, building, installing, and testing the tz distribution on a GNU/Linux or similar host. +To acquire the distribution, run the following shell commands: + + mkdir tz + cd tz + wget --retr-symlinks 'ftp://ftp.iana.org/tz/tz*-latest.tar.gz' + gzip -dc tzcode-latest.tar.gz | tar -xf - + gzip -dc tzdata-latest.tar.gz | tar -xf - + +Alternatively, the following shell commands acquire the same +distribution, with extra data useful for regression testing: + wget --retr-symlinks 'ftp://ftp.iana.org/tz/tzdb-latest.tar.lz' lzip -dc tzdb-latest.tar.lz | tar -xf - diff --git a/tz-how-to.html b/tz-how-to.html index 7d9d521..a94759e 100644 --- a/tz-how-to.html +++ b/tz-how-to.html @@ -12,8 +12,7 @@ Database</a> Source Files</h2> times of day from the <a href="tz-link.htm">tz database</a> source files. It might be helpful, but not absolutely necessary, for the reader to have already downloaded the -<a href="http://www.iana.org/time-zones/repository/tzdb-latest.tar.lz">latest -release of the database</a> and become familiar with the basic layout +latest release of the database and become familiar with the basic layout of the data files. The format is explained in the “man page” for the zic compiler, <code>zic.8.txt</code>, in the <code>code</code> subdirectory.</p> diff --git a/tz-link.htm b/tz-link.htm index 8b05470..52bb492 100644 --- a/tz-link.htm +++ b/tz-link.htm @@ -10,7 +10,7 @@ content="Sources for time zone and daylight saving time data"> <meta name="DC.Creator" content="Eggert, Paul"> <meta name="DC.Contributor" content="Olson, Arthur David"> -<meta name="DC.Date" content="2016-08-30"> +<meta name="DC.Date" content="2016-09-05"> <meta name="DC.Description" content="Sources of information about time zones and daylight saving time"> <meta name="DC.Identifier" @@ -42,7 +42,7 @@ This database (often called <code>zoneinfo</code> or <code><abbr>tz</abbr></code>) is used by several implementations, including -<a href="http://www.gnu.org/software/libc/">the +<a href="https://www.gnu.org/software/libc/">the <abbr title="GNU's Not Unix">GNU</abbr> C Library</a> (used in <a href="https://en.wikipedia.org/wiki/Linux"><abbr>GNU</abbr>/Linux</a>), @@ -108,33 +108,35 @@ for Eastern Standard Time in the <abbr>US</abbr>.</p> <p> The following <a href="https://en.wikipedia.org/wiki/Unix_shell">shell</a> commands download -the latest release to a <abbr>GNU</abbr>/Linux or similar host; -see the downloaded -<code>README</code> file for what to do next.</p> -<pre style="margin-left: 2em"><code><a href="http://www.gnu.org/software/wget/">wget</a> --retr-symlinks 'ftp://ftp.iana.org/tz/tzdb-latest.tar.lz' -<a href="http://www.nongnu.org/lzip/">lzip</a> -dc tzdb-latest.tar.lz | <a href="http://www.gnu.org/software/tar/">tar</a> -xf - +the latest release's two +<a href="https://en.wikipedia.org/wiki/Tar_(computing)">tarballs</a> +to a <abbr>GNU</abbr>/Linux or similar host.</p> +<pre style="margin-left: 2em"><code>mkdir tzdb +cd tzdb +<a href="https://www.gnu.org/software/wget/">wget</a> --retr-symlinks 'ftp://ftp.iana.org/tz/tz*-latest.tar.gz' +<a href="https://www.gnu.org/software/gzip/">gzip</a> -dc tzcode-latest.tar.gz | <a href="https://www.gnu.org/software/tar/">tar</a> -xf - +gzip -dc tzdata-latest.tar.gz | tar -xf - </code></pre> -<p>This uses a convenience link to the -<a href="ftp://ftp.iana.org/tz/tzdb-latest.tar.lz">latest version</a> -archived in the +<p>Alternatively, the following shell commands download the same +release in a single-tarball format containing extra data +useful for regression testing:</p> +<pre style="margin-left: 2em"><code>wget --retr-symlinks 'ftp://ftp.iana.org/tz/tzdb-latest.tar.lz' +<a href="http://www.nongnu.org/lzip/">lzip</a> -dc tzdb-latest.tar.lz | tar -xf - +</code></pre> +<p>These commands use convenience links to the latest of the <a href="ftp://ftp.iana.org/tz/releases/"><abbr title="File Transfer Protocol">FTP</abbr> releases</a> of the <code><abbr>tz</abbr></code> database. -Archived versions are in files named <code>tzdb-<var>V</var>.tar.lz</code>, +Older releases are in files named +<code>tzcode<var>V</var>.tar.gz</code>, +<code>tzdata<var>V</var>.tar.gz</code>, and +<code>tzdb-<var>V</var>.tar.lz</code>, where <code><var>V</var></code> is the version. -For compatibility with releases before 2016g, a -<a href="https://www.gnu.org/software/gzip/">gzip</a>-compressed two-tarball -distribution is also available, where the code is in the -file <code>tzcode<var>C</var>.tar.gz</code>, -where <code><var>C</var></code> is the code's version; -similarly, the data entries are in <code>tzdata<var>D</var>.tar.gz</code>, -where <code><var>D</var></code> is the data's version. Since 1996, each version has been a four-digit year followed by lower-case letter (<samp>a</samp> through <samp>z</samp>, then <samp>za</samp> through <samp>zz</samp>, then <samp>zza</samp> -through <samp>zzz</samp>, and so on).</p> -<p> -The code and data files can also be obtained from the +through <samp>zzz</samp>, and so on). +The releases can also be obtained from the <a href="http://www.iana.org/time-zones">Time Zone Database website</a> of the <a href="http://www.iana.org">Internet Assigned Numbers Authority (IANA)</a>. @@ -144,6 +146,8 @@ in <a href="http://git-scm.com">Git</a> form from <a href="https://github.com">GitHub</a>; be careful, as this repository is less well tested and probably contains more errors. <p> +After extracting a distribution's files, see its +<code>README</code> file for what to do next. The code lets you compile the <code><abbr>tz</abbr></code> source files into machine-readable binary files, one for each location. It also lets you read a <code><abbr>tz</abbr></code> binary file and interpret time stamps for that @@ -295,7 +299,7 @@ program that compiles <code><abbr>tz</abbr></code> source into iCalendar-compatible VTIMEZONE files. Vzic is freely available under the <a -href="http://www.gnu.org/copyleft/gpl.html"><abbr>GNU</abbr> +href="https://www.gnu.org/copyleft/gpl.html"><abbr>GNU</abbr> General Public License (<abbr title="General Public License">GPL</abbr>)</a>.</li> <li><a href="https://sourceforge.net/projects/tzical/">tziCal – tz @@ -357,7 +361,7 @@ Advanced date, time and interval library for Java</a> contains a class <code>net.time4j.tool.TimezoneRepositoryCompiler</code> that compiles <code><abbr>tz</abbr></code> source into a binary format. Time4J is available under the <a -href="http://www.gnu.org/copyleft/lesser.html"><abbr>GNU</abbr> Lesser +href="https://www.gnu.org/copyleft/lesser.html"><abbr>GNU</abbr> Lesser General Public License (<abbr title="Lesser General Public License">LGPL</abbr>)</a>.</li> <li><abbr>ICU</abbr> (mentioned above) contains compilers and @@ -413,7 +417,7 @@ license.</li> <h2>Other <code><abbr>tz</abbr></code> binary file readers</h2> <ul> <li>The <a -href="http://www.gnu.org/software/libc/"><abbr>GNU</abbr> C +href="https://www.gnu.org/software/libc/"><abbr>GNU</abbr> C Library</a> has an independent, thread-safe implementation of a <code><abbr>tz</abbr></code> binary file reader. -- 2.7.4

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tzdata for 2016 leap seconds
by Jimmy Wang (jcwang) Sept. 5, 2016

Sept. 5, 2016

Hi Paul et al, We heard that the tzdata for 2016 leap seconds would be published around Oct. Is there anyway that this can be published sooner? Many of our upstream vendors won't release their tzdata update until the official tzdata is published. Thanks, Jimmy

7 11

[PROPOSED PATCH] port 'environ' decl to Solaris 10
by Paul Eggert Sept. 5, 2016

Sept. 5, 2016

POSIX says apps must declare 'environ' themselves. Although this is not necessary on GNU/Linux with _GNU_SOURCE defined, it is needed with stricter environments like Solaris 10. * date.c, zdump.c (environ): Declare even if HAVE_POSIX_DECLS. --- date.c | 3 ++- zdump.c | 3 ++- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/date.c b/date.c index 4c11f61..512d1ef 100644 --- a/date.c +++ b/date.c @@ -42,8 +42,9 @@ #define SECSPERMIN 60 #endif /* !defined SECSPERMIN */ -#if !HAVE_POSIX_DECLS extern char ** environ; + +#if !HAVE_POSIX_DECLS extern char * optarg; extern int optind; extern char * tzname[]; diff --git a/zdump.c b/zdump.c index 694b04f..f68ba3d 100644 --- a/zdump.c +++ b/zdump.c @@ -258,8 +258,9 @@ enum { SECSPER400YEARS_FITS = SECSPERLYEAR <= INTMAX_MAX / 400 }; # define timezone_t char ** #endif -#if !HAVE_POSIX_DECLS extern char ** environ; + +#if !HAVE_POSIX_DECLS extern int getopt(int argc, char * const argv[], const char * options); extern char * optarg; -- 2.7.4

2 2

[PROPOSED PATCH] * zic.c (dolink): Fix typo (missing newline) in diagnostic.
by Paul Eggert Sept. 4, 2016

Sept. 4, 2016

--- zic.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/zic.c b/zic.c index 9c696c6..b8bd0a6 100644 --- a/zic.c +++ b/zic.c @@ -772,7 +772,7 @@ dolink(char const *fromfield, char const *tofield) fromisdir = itsdir(fromname); if (fromisdir) { char const *e = strerror(fromisdir < 0 ? errno : EPERM); - fprintf(stderr, _("%s: link from %s failed: %s"), + fprintf(stderr, _("%s: link from %s failed: %s\n"), progname, fromname, e); exit(EXIT_FAILURE); } -- 2.7.4

1 0

[PROPOSED PATCH] zic fix storage-allocation bug with realloc
by Paul Eggert Sept. 4, 2016

Sept. 4, 2016

This bug was introduced in last month's Casablanca-in-2037 fix. Problem found by valgrind. * zic.c (outzone): Don't access freed storage. --- zic.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/zic.c b/zic.c index 1c91d5a..9c696c6 100644 --- a/zic.c +++ b/zic.c @@ -2290,7 +2290,7 @@ outzone(const struct zone *zpfirst, int zonecount) register int compat; register bool do_extend; register char version; - struct attype *lastatmax = NULL; + int lastatmax = -1; max_abbr_len = 2 + max_format_len + max_abbrvar_len; max_envvar_len = 2 * max_abbr_len + 5 * 9; @@ -2524,8 +2524,9 @@ outzone(const struct zone *zpfirst, int zonecount) type = addtype(offset, ab, rp->r_stdoff != 0, rp->r_todisstd, rp->r_todisgmt); if (rp->r_hiyear == ZIC_MAX - && ! (lastatmax && ktime < lastatmax->at)) - lastatmax = &attypes[timecnt]; + && ! (0 <= lastatmax + && ktime < attypes[lastatmax].at)) + lastatmax = timecnt; addtt(ktime, type); } } @@ -2557,8 +2558,8 @@ error(_("can't determine time zone abbreviation to use just after until time")); starttime = tadd(starttime, -gmtoff); } } - if (lastatmax) - lastatmax->dontmerge = true; + if (0 <= lastatmax) + attypes[lastatmax].dontmerge = true; if (do_extend) { /* ** If we're extending the explicitly listed observations -- 2.7.4

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