August 2014 - tz - lists.iana.org

DST ended 14 hours early for one British clock in fall 1916
by Paul Eggert Aug. 27, 2014

Aug. 27, 2014

The online Wall Street Journal has a World War I Centenary series, and its Daylight-Saving Time page has a photo captioned "A notice informs the British public of a change in time as clocks go back an hour in the first year of daylight saving on Oct. 1, 1916. Topical Press Agency/Getty Images". The interesting thing about the notice is that its transition is off by 14 hours compared to our data. The notice is under a large outdoor hanging clock and says "CHANGE OF TIME. AT 1 P.M. SEPT 30th THIS CLOCK WILL BE SET BACK ONE HOUR TO GREENWICH TIME". Perhaps the clock's operator didn't want to bother changing the clock at the official transition time of 3 A.M. the next day. Fidler S. Daylight-saving time. Wall Street Journal. http://online.wsj.com/ww1/daylight-saving-time

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[PROPOSED PATCH] * backzone: Spelling and accent fixes.
by Paul Eggert Aug. 26, 2014

Aug. 26, 2014

--- backzone | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/backzone b/backzone index 66d3e27..d9183cd 100644 --- a/backzone +++ b/backzone @@ -81,7 +81,7 @@ Zone Africa/Douala 0:38:48 - LMT 1912 # The following table is from Shanks & Pottenger, but it can't be right. # Whitman gives Mar 31 - Aug 31 for 1931 on. # The International Hydrographic Bulletin, 1932-33, p 63 says that -# Sierra Leone would advance its clocks by 20 monutes on 1933-10-01. +# Sierra Leone would advance its clocks by 20 minutes on 1933-10-01. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule SL 1935 1942 - Jun 1 0:00 0:40 SLST Rule SL 1935 1942 - Oct 1 0:00 0 WAT @@ -210,7 +210,7 @@ Zone America/Grenada -4:07:00 - LMT 1911 Jul # St George's -4:00 - AST # Guadeloupe -Zone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre +Zone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe-à-Pitre -4:00 - AST # Montserrat @@ -223,7 +223,7 @@ Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Cork Hill # Argentina # This entry was intended for the following areas, but has been superseded by # more detailed zones. -# Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN), Chaco (CC), +# Santa Fe (SF), Entre Ríos (ER), Corrientes (CN), Misiones (MN), Chaco (CC), # Formosa (FM), La Pampa (LP), Chubut (CH) Zone America/Rosario -4:02:40 - LMT 1894 Nov -4:16:44 - CMT 1920 May @@ -349,9 +349,9 @@ Zone Europe/Guernsey -0:09:19 - LMT 1913 Jun 18 # <http://www.legislation.gov.im>, starting with the original Statutory # Time Act in 1883 and including additional confirmation of some of # the dates of the 'Summer Time' orders originating at -# Westminster. There is a little uncertinity as to the starting date +# Westminster. There is a little uncertainty as to the starting date # of the first summer time in 1916 which may have be announced a -# couple of days late. There is still a substatial number of +# couple of days late. There is still a substantial number of # documents to work through, but it is thought that every GB change # was also implemented on the island. # -- 1.9.1

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Typo fix
by Tim Parenti Aug. 26, 2014

Aug. 26, 2014

The attached patch fixes a typo in NEWS which I introduced a while back. -- Tim Parenti

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[PROPOSED PATCH] localtime.c: two minor 'bool' cleanups
by Paul Eggert Aug. 26, 2014

Aug. 26, 2014

These don't fix any bugs, but make the recently-introduced 'bool' code easier to follow. * localtime.c (gmtcheck): Move gmt_is_set's definition here, since it's used only here. (localtime_r): Explicitly convert integer to boolean rather than relying on C99 semantics. --- localtime.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/localtime.c b/localtime.c index d5fd508..aee343e 100644 --- a/localtime.c +++ b/localtime.c @@ -177,7 +177,6 @@ static struct state gmtmem; static char lcl_TZname[TZ_STRLEN_MAX + 1]; static int VOLATILE lcl_is_set; -static bool VOLATILE gmt_is_set; char * tzname[2] = { (char *) wildabbr, @@ -1262,6 +1261,7 @@ tzset(void) static void gmtcheck(void) { + static bool VOLATILE gmt_is_set; if (gmt_is_set) return; if (lock() != 0) @@ -1415,7 +1415,7 @@ localtime(const time_t *const timep) struct tm * localtime_r(const time_t *const timep, struct tm *tmp) { - return localtime_tzset(timep, tmp, lcl_is_set); + return localtime_tzset(timep, tmp, lcl_is_set != 0); } /* -- 1.9.1

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2014g soon
by Paul Eggert Aug. 26, 2014

Aug. 26, 2014

It's time for a new tz release: we have one change to near-future data (for the Turks & Caicos) that should go out sooner rather than later, and there've been several changes to the code as well. To help simplify reviewing I've pushed an integrated version of the proposed changes to <https://github.com/eggert/tz>, and you can read the news here: https://github.com/eggert/tz/blob/master/NEWS

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[PROPOSED PATCH] * NEWS: Coalesce discussions of zdump, localtime_rz, and localtime_r.
by Paul Eggert Aug. 26, 2014

Aug. 26, 2014

--- NEWS | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/NEWS b/NEWS index 8302547..b031a32 100644 --- a/NEWS +++ b/NEWS @@ -52,10 +52,6 @@ Unreleased, experimental changes Although not needed for tz's own applications, which are single-threaded, this supports POSIX better if the tz library is used in multithreaded apps. - zdump now uses localtime_r and tzset if available, as this is a - bit cleaner and faster than plain localtime. Compile with - -DHAVE_LOCALTIME_R=0 and/or -DHAVE_TZSET=0 if your system lacks them. - Unless NETBSD_INSPIRED is defined to 0, the tz library now supplies functions that let callers create and use objects representing time zones. This is intended for applications that need to deal with many time @@ -89,7 +85,11 @@ Unreleased, experimental changes zdump now uses localtime_rz if available, as it's significantly faster. Define HAVE_LOCALTIME_RZ to 0 to suppress this. HAVE_LOCALTIME_TZ - defaults to 1 if NETBSD_INSPIRED && USE_LTZ. + defaults to 1 if NETBSD_INSPIRED && USE_LTZ. When localtime_rz is + not available, zdump now uses localtime_r and tzset if available, + as this is a bit cleaner and faster than plain localtime. Compile + with -DHAVE_LOCALTIME_R=0 and/or -DHAVE_TZSET=0 if your system + lacks these two functions. tzselect -c now uses a hybrid distance measure that works better in Africa. (Thanks to Alan Barrett for noting the problem.) -- 1.9.1

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[PROPOSED PATCH] * Makefile, NEWS: Say that backzone's contents are not all low-quality
by Paul Eggert Aug. 26, 2014

Aug. 26, 2014

and give credit to Lester Caine for some of its high-quality entries. --- Makefile | 4 ++-- NEWS | 9 +++++---- 2 files changed, 7 insertions(+), 6 deletions(-) diff --git a/Makefile b/Makefile index 2354a3f..8ccbaf4 100644 --- a/Makefile +++ b/Makefile @@ -84,8 +84,8 @@ LIBDIR= $(TOPDIR)/lib # below. If you want both sets of data available, with leap seconds counted # normally, use # REDO= right_posix -# below. If you want just POSIX-compatible time values, but with extra -# lower-quality data from the file 'backzone', use +# below. If you want just POSIX-compatible time values, but with +# out-of-scope and often-wrong data from the file 'backzone', use # REDO= posix_packrat # POSIX mandates that leap seconds not be counted; for compatibility with it, # use "posix_only", "posix_right", or "posix_packrat". diff --git a/NEWS b/NEWS index 3c8b84b..8302547 100644 --- a/NEWS +++ b/NEWS @@ -26,10 +26,11 @@ Unreleased, experimental changes A new file 'backzone' contains data which may appeal to connoisseurs of old time stamps, although it is out of scope for - the tz database and is often poorly sourced. The new file is not - recommended for ordinary use and its entries are not installed by - default. (Thanks to Lester Caine for the Guernsey, Jersey, and - Isle of Man entries in 'backzone'.) + the tz database, is often poorly sourced, and contains some data + that is known to be incorrect. The new file is not recommended + for ordinary use and its entries are not installed by default. + (Thanks to Lester Caine for the high-quality Jersey, Guernsey, and + Isle of Man entries.) Some more zones have been turned into links, when they differed from existing zones only for older time stamps. As usual, -- 1.9.1

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[PROPOSED PATCH] Port 'bool' usage to clang 3.4.
by Paul Eggert Aug. 26, 2014

Aug. 26, 2014

* date.c (convert, reset): Fix prototype to match function, as the C standard requires. --- date.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/date.c b/date.c index 3b44c94..b77de79 100644 --- a/date.c +++ b/date.c @@ -55,14 +55,14 @@ extern char * tzname[2]; static int retval = EXIT_SUCCESS; static void checkfinal(char const *, bool, time_t, time_t); -static time_t convert(const char *, int, time_t); +static time_t convert(const char *, bool, time_t); static void display(const char *, time_t); static void dogmt(void); static void errensure(void); static void iffy(time_t, time_t, const char *, const char *); static const char * nondigit(const char *); static void oops(const char *); -static void reset(time_t, int); +static void reset(time_t, bool); static void timeout(FILE *, const char *, const struct tm *); static void usage(void); static void wildinput(const char *, const char *, -- 1.9.1

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[PROPOSED PATCH 1/3] Port 'make check_time_t_alternatives' to Solaris 10.
by Paul Eggert Aug. 26, 2014

Aug. 26, 2014

* Makefile (check_time_t_alternatives): Don't assume 'diff' has the -q option, since POSIX does not require -q. * NEWS: Document this. --- Makefile | 9 ++++++++- NEWS | 2 ++ 2 files changed, 10 insertions(+), 1 deletion(-) diff --git a/Makefile b/Makefile index 0fc8e2c..92fad4d 100644 --- a/Makefile +++ b/Makefile @@ -569,6 +569,11 @@ check_public: $(ENCHILADA) # Check that the code works under various alternative # implementations of time_t. check_time_t_alternatives: + if diff -q Makefile Makefile 2>/dev/null; then \ + quiet_option='-q'; \ + else \ + quiet_option=''; \ + fi && \ zones=`$(AWK) '/^[^#]/ { print $$3 }' <zone1970.tab` && \ for type in $(TIME_T_ALTERNATIVES); do \ mkdir -p tzpublic/$$type && \ @@ -577,7 +582,9 @@ check_time_t_alternatives: CFLAGS='$(CFLAGS) -Dtime_tz='"'$$type'" \ REDO='$(REDO)' \ install && \ - diff -qr tzpublic/int64_t/etc/zoneinfo tzpublic/$$type/etc/zoneinfo && \ + diff $$quiet_option -r \ + tzpublic/int64_t/etc/zoneinfo \ + tzpublic/$$type/etc/zoneinfo && \ case $$type in \ int32_t) range=-2147483648,2147483647;; \ uint32_t) range=0,4294967296;; \ diff --git a/NEWS b/NEWS index fb2f31b..a453ef6 100644 --- a/NEWS +++ b/NEWS @@ -112,6 +112,8 @@ Unreleased, experimental changes 'zdump' no longer links in ialloc.o, as it's not needed. + 'make check_time_t_alternatives' no longer assumes GNU diff. + Changes affecting distribution tarballs The files checktab.awk and zoneinfo2tdf.pl are now distributed in -- 1.9.1

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[PROPOSED PATCH 1/3] date: port to Ubuntu 14.04 with -DHAVE_UTMPX_H=1
by Paul Eggert Aug. 25, 2014

Aug. 25, 2014

* date.c (WTMPX_FILE): Define to _PATH_WTMPX if not already defined and if _PATH_WTMPX is defined. (reset): Do not use WTMPX_FILE if it is not defined. * NEWS: Document this. --- NEWS | 5 +++++ date.c | 7 +++++-- 2 files changed, 10 insertions(+), 2 deletions(-) diff --git a/NEWS b/NEWS index 2c8b474..a8218f1 100644 --- a/NEWS +++ b/NEWS @@ -39,6 +39,11 @@ Unreleased, experimental changes tzselect -c now uses a hybrid distance measure that works better in Africa. (Thanks to Alan Barrett for noting the problem.) + When HAVE_UTMPX_H is set the 'date' command now builds on systems + whose <utmpx.h> file does not define WTMPX_FILE, and when setting + the date it updates the wtmpx file if _PATH_WTMPX is defined. + This affects GNU/Linux and similar systems. + Changes affecting distribution tarballs The files checktab.awk and zoneinfo2tdf.pl are now distributed in diff --git a/date.c b/date.c index 9a0b84c..3d78914 100644 --- a/date.c +++ b/date.c @@ -31,6 +31,9 @@ #ifndef NTIME_MSG #define NTIME_MSG "new time" #endif +#if !defined WTMPX_FILE && defined _PATH_WTMPX +# define WTMPX_FILE _PATH_WTMPX +#endif /* ** The two things date knows about time are. . . @@ -378,7 +381,7 @@ reset(const time_t newt, const int nflag) sx.after.ut_type = NEW_TIME; sx.after.ut_tv.tv_sec = newt; (void) strcpy(sx.after.ut_line, NTIME_MSG); -#if !SUPPRESS_WTMPX_FILE_UPDATE +#if defined WTMPX_FILE && !SUPPRESS_WTMPX_FILE_UPDATE /* In Solaris 2.5 (and presumably other systems), 'date' does not update /var/adm/wtmpx. This must be a bug. If you'd like to reproduce the bug, @@ -390,7 +393,7 @@ reset(const time_t newt, const int nflag) oops(_("log file write")); if (close(fid) != 0) oops(_("log file close")); -#endif /* !SUPPRESS_WTMPX_FILE_UPDATE */ +# endif pututxline(&sx.before); pututxline(&sx.after); #endif /* HAVE_UTMPX_H */ -- 1.9.1

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