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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.
This commit is contained in:
christos 2018-01-25 22:48:42 +00:00
parent c0bd564447
commit cf47161082
14 changed files with 553 additions and 233 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

181
lib/libc/time/Makefile
View File

@ -42,36 +42,63 @@ POSIXRULES= America/New_York
# Also see TZDEFRULESTRING below, which takes effect only
# if the time zone files cannot be accessed.
# Everything gets put in subdirectories of. . .
TOPDIR= /usr/local
# Installation locations.
#
# The defaults are suitable for Debian, except that if REDO is
# posix_right or right_posix then files that Debian puts under
# /usr/share/zoneinfo/posix and /usr/share/zoneinfo/right are instead
# put under /usr/share/zoneinfo-posix and /usr/share/zoneinfo-leaps,
# respectively. Problems with the Debian approach are discussed in
# the commentary for the right_posix rule (below).
# Destination directory, which can be used for staging.
# 'make DESTDIR=/stage install' installs under /stage (e.g., to
# /stage/etc/localtime instead of to /etc/localtime). Files under
# /stage are not intended to work as-is, but can be copied by hand to
# the root directory later. If DESTDIR is empty, 'make install' does
# not stage, but installs directly into production locations.
DESTDIR =
# Everything is installed into subdirectories of TOPDIR, and used there.
# TOPDIR should be empty (meaning the root directory),
# or a directory name that does not end in "/".
# TOPDIR should be empty or an absolute name unless you're just testing.
TOPDIR =
# The default local time zone is taken from the file TZDEFAULT.
TZDEFAULT = $(TOPDIR)/etc/localtime
# The subdirectory containing installed program and data files, and
# likewise for installed files that can be shared among architectures.
# These should be relative file names.
USRDIR = usr
USRSHAREDIR = $(USRDIR)/share
# "Compiled" time zone information is placed in the "TZDIR" directory
# (and subdirectories).
# Use an absolute path name for TZDIR unless you're just testing the software.
# TZDIR_BASENAME should not contain "/" and should not be ".", ".." or empty.
TZDIR_BASENAME= zoneinfo
TZDIR= $(TOPDIR)/etc/$(TZDIR_BASENAME)
TZDIR = $(TOPDIR)/$(USRSHAREDIR)/$(TZDIR_BASENAME)
# Types to try, as an alternative to time_t. int64_t should be first.
TIME_T_ALTERNATIVES= int64_t int32_t uint32_t uint64_t
# The "tzselect" and (if you do "make INSTALL") "date" commands go in:
BINDIR = $(TOPDIR)/$(USRDIR)/bin
# The "tzselect", "zic", and "zdump" commands get installed in. . .
# The "zdump" command goes in:
ZDUMPDIR = $(BINDIR)
ETCDIR= $(TOPDIR)/etc
# If you "make INSTALL", the "date" command gets installed in. . .
BINDIR= $(TOPDIR)/bin
# The "zic" command goes in:
ZICDIR = $(TOPDIR)/$(USRDIR)/sbin
# Manual pages go in subdirectories of. . .
MANDIR= $(TOPDIR)/man
MANDIR = $(TOPDIR)/$(USRSHAREDIR)/man
# Library functions are put in an archive in LIBDIR.
LIBDIR = $(TOPDIR)/$(USRDIR)/lib
LIBDIR= $(TOPDIR)/lib
# Types to try, as an alternative to time_t. int64_t should be first.
TIME_T_ALTERNATIVES = int64_t int32_t uint32_t uint64_t
# If you want only POSIX time, with time values interpreted as
# seconds since the epoch (not counting leap seconds), use
@ -105,11 +132,14 @@ REDO= posix_right
TZDATA_TEXT= leapseconds tzdata.zi
# For backward-compatibility links for old zone names, use
# BACKWARD= backward
# If you also want the link US/Pacific-New, even though it is confusing
# and is planned to be removed from the database eventually, use
# BACKWARD= backward pacificnew
# To omit these links, use
# BACKWARD=
BACKWARD= backward pacificnew
BACKWARD= backward
# If you want out-of-scope and often-wrong data from the file 'backzone', use
# PACKRATDATA= backzone
@ -313,7 +343,7 @@ ZFLAGS=
# How to use zic to install tz binary files.
ZIC_INSTALL= $(ZIC) -d $(DESTDIR)$(TZDIR) $(LEAPSECONDS)
ZIC_INSTALL= $(ZIC) -d '$(DESTDIR)$(TZDIR)' $(LEAPSECONDS)
# The name of a Posix-compliant 'awk' on your system.
AWK= awk
@ -341,8 +371,8 @@ SGML_CATALOG_FILES= \
VALIDATE = nsgmls
VALIDATE_FLAGS = -s -B -wall -wno-unused-param
VALIDATE_ENV = \
SGML_CATALOG_FILES=$(SGML_CATALOG_FILES) \
SGML_SEARCH_PATH=$(SGML_SEARCH_PATH) \
SGML_CATALOG_FILES='$(SGML_CATALOG_FILES)' \
SGML_SEARCH_PATH='$(SGML_SEARCH_PATH)' \
SP_CHARSET_FIXED=YES \
SP_ENCODING=UTF-8
@ -396,7 +426,7 @@ GZIPFLAGS= -9n
#MAKE= make
cc= cc
CC= $(cc) -DTZDIR=\"$(TZDIR)\"
CC= $(cc) -DTZDIR='"$(TZDIR)"'
AR= ar
@ -421,18 +451,19 @@ MANTXTS= newctime.3.txt newstrftime.3.txt newtzset.3.txt \
date.1.txt
COMMON= calendars CONTRIBUTING LICENSE Makefile \
NEWS README theory.html version
WEB_PAGES= tz-art.htm tz-how-to.html tz-link.htm
WEB_PAGES= tz-art.html tz-how-to.html tz-link.html
DOCS= $(MANS) date.1 $(MANTXTS) $(WEB_PAGES)
PRIMARY_YDATA= africa antarctica asia australasia \
europe northamerica southamerica
YDATA= $(PRIMARY_YDATA) etcetera $(BACKWARD)
YDATA= $(PRIMARY_YDATA) etcetera
NDATA= systemv factory
TDATA= $(YDATA) $(NDATA)
TDATA_TO_CHECK= $(YDATA) $(NDATA) backward pacificnew
TDATA= $(YDATA) $(NDATA) $(BACKWARD)
ZONETABLES= zone1970.tab zone.tab
TABDATA= iso3166.tab $(TZDATA_TEXT) $(ZONETABLES)
LEAP_DEPS= leapseconds.awk leap-seconds.list
TZDATA_ZI_DEPS= zishrink.awk $(TDATA) $(PACKRATDATA)
DATA= $(YDATA) $(NDATA) backzone iso3166.tab leap-seconds.list \
TZDATA_ZI_DEPS= zishrink.awk version $(TDATA) $(PACKRATDATA)
DATA= $(TDATA_TO_CHECK) backzone iso3166.tab leap-seconds.list \
leapseconds yearistype.sh $(ZONETABLES)
AWK_SCRIPTS= checklinks.awk checktab.awk leapseconds.awk zishrink.awk
MISC= $(AWK_SCRIPTS) zoneinfo2tdf.pl
@ -457,7 +488,7 @@ VERSION_DEPS= \
newctime.3 newstrftime.3 newtzset.3 northamerica \
pacificnew private.h \
southamerica strftime.c systemv theory.html \
time2posix.3 tz-art.htm tz-how-to.html tz-link.htm \
time2posix.3 tz-art.html tz-how-to.html tz-link.html \
tzfile.5 tzfile.h tzselect.8 tzselect.ksh \
workman.sh yearistype.sh \
zdump.8 zdump.c zic.8 zic.c \
@ -473,35 +504,41 @@ all: tzselect yearistype zic zdump libtz.a $(TABDATA)
ALL: all date $(ENCHILADA)
install: all $(DATA) $(REDO) $(MANS)
mkdir -p $(DESTDIR)$(ETCDIR) $(DESTDIR)$(TZDIR) \
$(DESTDIR)$(LIBDIR) \
$(DESTDIR)$(MANDIR)/man3 $(DESTDIR)$(MANDIR)/man5 \
$(DESTDIR)$(MANDIR)/man8
$(ZIC_INSTALL) -l $(LOCALTIME) -p $(POSIXRULES)
cp -f $(TABDATA) $(DESTDIR)$(TZDIR)/.
cp tzselect zic zdump $(DESTDIR)$(ETCDIR)/.
cp libtz.a $(DESTDIR)$(LIBDIR)/.
$(RANLIB) $(DESTDIR)$(LIBDIR)/libtz.a
cp -f newctime.3 newtzset.3 $(DESTDIR)$(MANDIR)/man3/.
cp -f tzfile.5 $(DESTDIR)$(MANDIR)/man5/.
cp -f tzselect.8 zdump.8 zic.8 $(DESTDIR)$(MANDIR)/man8/.
mkdir -p '$(DESTDIR)$(BINDIR)' \
'$(DESTDIR)$(ZDUMPDIR)' '$(DESTDIR)$(ZICDIR)' \
'$(DESTDIR)$(LIBDIR)' \
'$(DESTDIR)$(MANDIR)/man3' '$(DESTDIR)$(MANDIR)/man5' \
'$(DESTDIR)$(MANDIR)/man8'
$(ZIC_INSTALL) -l $(LOCALTIME) -p $(POSIXRULES) \
-t '$(DESTDIR)$(TZDEFAULT)'
cp -f $(TABDATA) '$(DESTDIR)$(TZDIR)/.'
cp tzselect '$(DESTDIR)$(BINDIR)/.'
cp zdump '$(DESTDIR)$(ZDUMPDIR)/.'
cp zic '$(DESTDIR)$(ZICDIR)/.'
cp libtz.a '$(DESTDIR)$(LIBDIR)/.'
$(RANLIB) '$(DESTDIR)$(LIBDIR)/libtz.a'
cp -f newctime.3 newtzset.3 '$(DESTDIR)$(MANDIR)/man3/.'
cp -f tzfile.5 '$(DESTDIR)$(MANDIR)/man5/.'
cp -f tzselect.8 zdump.8 zic.8 '$(DESTDIR)$(MANDIR)/man8/.'
INSTALL: ALL install date.1
mkdir -p $(DESTDIR)$(BINDIR) $(DESTDIR)$(MANDIR)/man1
cp date $(DESTDIR)$(BINDIR)/.
cp -f date.1 $(DESTDIR)$(MANDIR)/man1/.
mkdir -p '$(DESTDIR)$(BINDIR)' '$(DESTDIR)$(MANDIR)/man1'
cp date '$(DESTDIR)$(BINDIR)/.'
cp -f date.1 '$(DESTDIR)$(MANDIR)/man1/.'
version: $(VERSION_DEPS)
{ (type git) >/dev/null 2>&1 && \
V=`git describe --match '[0-9][0-9][0-9][0-9][a-z]*' \
--abbrev=7 --dirty` || \
V=$(VERSION); } && \
V='$(VERSION)'; } && \
printf '%s\n' "$$V" >$@.out
mv $@.out $@
# This file can be tailored by setting BACKWARD, PACKRATDATA, etc.
tzdata.zi: $(TZDATA_ZI_DEPS)
LC_ALL=C $(AWK) -f zishrink.awk $(TDATA) $(PACKRATDATA) >$@.out
version=`sed 1q version` && \
LC_ALL=C $(AWK) -v version="$$version" -f zishrink.awk \
$(TDATA) $(PACKRATDATA) >$@.out
mv $@.out $@
version.h: version
@ -529,12 +566,13 @@ leapseconds: $(LEAP_DEPS)
# Arguments to pass to submakes of install_data.
# They can be overridden by later submake arguments.
INSTALLARGS = \
BACKWARD=$(BACKWARD) \
DESTDIR=$(DESTDIR) \
BACKWARD='$(BACKWARD)' \
DESTDIR='$(DESTDIR)' \
LEAPSECONDS='$(LEAPSECONDS)' \
PACKRATDATA='$(PACKRATDATA)' \
TZDIR=$(TZDIR) \
YEARISTYPE=$(YEARISTYPE) \
TZDEFAULT='$(TZDEFAULT)' \
TZDIR='$(TZDIR)' \
YEARISTYPE='$(YEARISTYPE)' \
ZIC='$(ZIC)'
# 'make install_data' installs one set of tz binary files.
@ -558,16 +596,16 @@ right_only:
# You must replace all of $(TZDIR) to switch from not using leap seconds
# to using them, or vice versa.
right_posix: right_only
rm -fr $(DESTDIR)$(TZDIR)-leaps
ln -s $(TZDIR_BASENAME) $(DESTDIR)$(TZDIR)-leaps || \
$(MAKE) $(INSTALLARGS) TZDIR=$(TZDIR)-leaps right_only
$(MAKE) $(INSTALLARGS) TZDIR=$(TZDIR)-posix posix_only
rm -fr '$(DESTDIR)$(TZDIR)-leaps'
ln -s '$(TZDIR_BASENAME)' '$(DESTDIR)$(TZDIR)-leaps' || \
$(MAKE) $(INSTALLARGS) TZDIR='$(TZDIR)-leaps' right_only
$(MAKE) $(INSTALLARGS) TZDIR='$(TZDIR)-posix' posix_only
posix_right: posix_only
rm -fr $(DESTDIR)$(TZDIR)-posix
ln -s $(TZDIR_BASENAME) $(DESTDIR)$(TZDIR)-posix || \
$(MAKE) $(INSTALLARGS) TZDIR=$(TZDIR)-posix posix_only
$(MAKE) $(INSTALLARGS) TZDIR=$(TZDIR)-leaps right_only
rm -fr '$(DESTDIR)$(TZDIR)-posix'
ln -s '$(TZDIR_BASENAME)' '$(DESTDIR)$(TZDIR)-posix' || \
$(MAKE) $(INSTALLARGS) TZDIR='$(TZDIR)-posix' posix_only
$(MAKE) $(INSTALLARGS) TZDIR='$(TZDIR)-leaps' right_only
# This obsolescent rule is present for backwards compatibility with
# tz releases 2014g through 2015g. It should go away eventually.
@ -633,7 +671,7 @@ check_character_set: $(ENCHILADA)
$(MISC) $(SOURCES) $(WEB_PAGES) \
CONTRIBUTING LICENSE Makefile README \
version tzdata.zi && \
! grep -Env $(SAFE_SHARP_LINE) $(TDATA) backzone \
! grep -Env $(SAFE_SHARP_LINE) $(TDATA_TO_CHECK) backzone \
leapseconds yearistype.sh zone.tab && \
! grep -Env $(OK_LINE) $(ENCHILADA); \
}
@ -641,14 +679,16 @@ check_character_set: $(ENCHILADA)
check_white_space: $(ENCHILADA)
patfmt=' \t|[\f\r\v]' && pat=`printf "$$patfmt\\n"` && \
! grep -En "$$pat" $(ENCHILADA)
! grep -n '[[:space:]]$$' $(ENCHILADA)
! grep -n '[[:space:]]$$' \
$$(ls $(ENCHILADA) | grep -Fvx leap-seconds.list)
PRECEDES_FILE_NAME = ^(Zone|Link[[:space:]]+[^[:space:]]+)[[:space:]]+
FILE_NAME_COMPONENT_TOO_LONG = \
$(PRECEDES_FILE_NAME)[^[:space:]]*[^/[:space:]]{15}
check_name_lengths: $(TDATA) backzone
! grep -En '$(FILE_NAME_COMPONENT_TOO_LONG)' $(TDATA) backzone
check_name_lengths: $(TDATA_TO_CHECK) backzone
! grep -En '$(FILE_NAME_COMPONENT_TOO_LONG)' \
$(TDATA_TO_CHECK) backzone
CHECK_CC_LIST = { n = split($$1,a,/,/); for (i=2; i<=n; i++) print a[1], a[i]; }
@ -662,8 +702,8 @@ check_sorted: backward backzone iso3166.tab zone.tab zone1970.tab
$(AWK) '/^[^#]/ $(CHECK_CC_LIST)' zone1970.tab | \
LC_ALL=C sort -cu
check_links: checklinks.awk $(TDATA)
$(AWK) -f checklinks.awk $(TDATA)
check_links: checklinks.awk $(TDATA_TO_CHECK)
$(AWK) -f checklinks.awk $(TDATA_TO_CHECK)
$(AWK) -f checklinks.awk tzdata.zi
check_tables: checktab.awk $(PRIMARY_YDATA) $(ZONETABLES)
@ -764,12 +804,12 @@ set-timestamps.out: $(ENCHILADA)
check_public:
$(MAKE) maintainer-clean
$(MAKE) "CFLAGS=$(GCC_DEBUG_FLAGS)" ALL
$(MAKE) CFLAGS='$(GCC_DEBUG_FLAGS)' ALL
mkdir -p public.dir
for i in $(TDATA) tzdata.zi; do \
for i in $(TDATA_TO_CHECK) tzdata.zi; do \
$(zic) -v -d public.dir $$i 2>&1 || exit; \
done
$(zic) -v -d public.dir $(TDATA)
$(zic) -v -d public.dir $(TDATA_TO_CHECK)
rm -fr public.dir
# Check that the code works under various alternative
@ -790,8 +830,11 @@ check_time_t_alternatives:
REDO='$(REDO)' \
install && \
diff $$quiet_option -r \
time_t.dir/int64_t/etc/zoneinfo \
time_t.dir/$$type/etc/zoneinfo && \
time_t.dir/int64_t/etc \
time_t.dir/$$type/etc && \
diff $$quiet_option -r \
time_t.dir/int64_t/usr/share \
time_t.dir/$$type/usr/share && \
case $$type in \
int32_t) range=-2147483648,2147483647;; \
uint32_t) range=0,4294967296;; \
@ -800,9 +843,9 @@ check_time_t_alternatives:
*) range=-10000000000,10000000000;; \
esac && \
echo checking $$type zones ... && \
time_t.dir/int64_t/etc/zdump -V -t $$range $$zones \
time_t.dir/int64_t/usr/bin/zdump -V -t $$range $$zones \
>time_t.dir/int64_t.out && \
time_t.dir/$$type/etc/zdump -V -t $$range $$zones \
time_t.dir/$$type/usr/bin/zdump -V -t $$range $$zones \
>time_t.dir/$$type.out && \
diff -u time_t.dir/int64_t.out time_t.dir/$$type.out \
|| exit; \

166
lib/libc/time/NEWS
View File

@ -1,5 +1,147 @@
News for the tz database
Release 2018c - 2018-01-22 23:00:44 -0800
Briefly:
Revert Irish changes that relied on negative DST offsets.
Changes to tm_isdst
Revert the 2018a change to Europe/Dublin. As before, this change
does not affect UT offsets or abbreviations; it affects only
whether timestamps are considered to be standard time or
daylight-saving time, as expressed in the tm_isdst flag of C's
struct tm type. This reversion is intended to be a temporary
workaround for problems discovered with downstream uses of
releases 2018a and 2018b, which implemented Irish time by using
negative DST offsets in the Eire rules of the 'europe' file.
Although negative DST offsets have been part of tzcode for many
years and are supported by many platforms, they were not
documented before 2018a and ICU and OpenJDK do not currently
support them. A mechanism to export data to platforms lacking
support for negative DST is planned to be developed before the
change is reapplied. (Problems reported by Deborah Goldsmith and
Stephen Colebourne.)
Changes to past time stamps
Japanese DST transitions (1948-1951) were Sundays at 00:00, not
Saturdays or Sundays at 02:00. (Thanks to Takayuki Nikai.)
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
Briefly:
Fix a packaging problem in tz2018a, which was missing 'pacificnew'.
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
Briefly:
São Tomé and Príncipe switched from +00 to +01.
Brazil's DST will now start on November's first Sunday.
Ireland's standard time is now in the summer, not the winter.
Use Debian-style installation locations, instead of 4.3BSD-style.
New zic option -t.
Changes to past and future time stamps
São Tomé and Príncipe switched from +00 to +01 on 2018-01-01 at
01:00. (Thanks to Steffen Thorsen and Michael Deckers.)
Changes to future time stamps
Starting in 2018 southern Brazil will begin DST on November's
first Sunday instead of October's third Sunday. (Thanks to
Steffen Thorsen.)
Changes to past time stamps
A discrepancy of 4 s in timestamps before 1931 in South Sudan has
been corrected. The 'backzone' and 'zone.tab' files did not agree
with the 'africa' and 'zone1970.tab' files. (Problem reported by
Michael Deckers.)
The abbreviation invented for Bolivia Summer Time (1931-2) is now
BST instead of BOST, to be more consistent with the convention
used for Latvian Summer Time (1918-9) and for British Summer Time.
Changes to tm_isdst
Change Europe/Dublin so that it observes Irish Standard Time (UT
+01) in summer and GMT (as negative daylight-saving) in winter,
instead of observing standard time (GMT) in winter and Irish
Summer Time (UT +01) in summer. This change does not affect UT
offsets or abbreviations; it affects only whether timestamps are
considered to be standard time or daylight-saving time, as
expressed in the tm_isdst flag of C's struct tm type.
(Discrepancy noted by Derick Rethans.)
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.
Release 2017c - 2017-10-20 14:49:34 -0700
Briefly:
@ -895,8 +1037,8 @@ Release 2015f - 2015-08-10 18:06:56 -0700
(Thanks to Jon Skeet and Arthur David Olson.) Constraints on
simultaneity are now documented.
The two characters '%z' in a zone format now stand for the UTC
offset, e.g., '-07' for seven hours behind UTC and '+0530' for
The two characters '%z' in a zone format now stand for the UT
offset, e.g., '-07' for seven hours behind UT and '+0530' for
five hours and thirty minutes ahead. This better supports time
zone abbreviations conforming to POSIX.1-2001 and later.
@ -1019,13 +1161,13 @@ Release 2015c - 2015-04-11 08:55:55 -0700
The spring 1988 transition was 1988-10-09, not 1988-10-02.
The fall 1990 transition was 1990-03-11, not 1990-03-18.
Assume no UTC offset change for Pacific/Easter on 1890-01-01,
Assume no UT offset change for Pacific/Easter on 1890-01-01,
and omit all transitions on Pacific/Easter from 1942 through 1946
since we have no data suggesting that they existed.
One more zone has been turned into a link, as it differed
from an existing zone only for older time stamps. As usual,
this change affects UTC offsets in pre-1970 time stamps only.
this change affects UT offsets in pre-1970 time stamps only.
The zone's old contents have been moved to the 'backzone' file.
The affected zone is America/Montreal.
@ -1055,7 +1197,7 @@ Release 2015b - 2015-03-19 23:28:11 -0700
Some more zones have been turned into links, when they differed
from existing zones only for older time stamps. As usual,
these changes affect UTC offsets in pre-1970 time stamps only.
these changes affect UT offsets in pre-1970 time stamps only.
Their old contents have been moved to the 'backzone' file.
The affected zones are: America/Antigua, America/Cayman,
Pacific/Midway, and Pacific/Saipan.
@ -1107,7 +1249,7 @@ Release 2015a - 2015-01-29 22:35:20 -0800
Some more zones have been turned into links, when they differed
from existing zones only for older time stamps. As usual,
these changes affect UTC offsets in pre-1970 time stamps only.
these changes affect UT offsets in pre-1970 time stamps only.
Their old contents have been moved to the 'backzone' file.
The affected zones are: Asia/Aden, Asia/Bahrain, Asia/Kuwait,
and Asia/Muscat.
@ -1154,7 +1296,7 @@ Release 2014j - 2014-11-10 17:37:11 -0800
Some more zones have been turned into links, when they differed
from existing zones only for older time stamps. As usual,
these changes affect UTC offsets in pre-1970 time stamps only.
these changes affect UT offsets in pre-1970 time stamps only.
Their old contents have been moved to the 'backzone' file.
The affected zones are: Africa/Addis_Ababa, Africa/Asmara,
Africa/Dar_es_Salaam, Africa/Djibouti, Africa/Kampala,
@ -1244,7 +1386,7 @@ Release 2014h - 2014-09-25 18:59:03 -0700
Some more zones have been turned into links, when they differed
from existing zones only for older timestamps. As usual,
these changes affect UTC offsets in pre-1970 timestamps only.
these changes affect UT offsets in pre-1970 timestamps only.
Their old contents have been moved to the 'backzone' file.
The affected zones are: Africa/Blantyre, Africa/Bujumbura,
Africa/Gaborone, Africa/Harare, Africa/Kigali, Africa/Lubumbashi,
@ -1329,7 +1471,7 @@ Release 2014g - 2014-08-28 12:31:23 -0700
Some more zones have been turned into links, when they differed
from existing zones only for older timestamps. As usual,
these changes affect UTC offsets in pre-1970 timestamps only.
these changes affect UT offsets in pre-1970 timestamps only.
Their old contents have been moved to the 'backzone' file.
The affected zones are: Africa/Bangui, Africa/Brazzaville,
Africa/Douala, Africa/Kinshasa, Africa/Libreville, Africa/Luanda,
@ -1479,7 +1621,7 @@ Release 2014f - 2014-08-05 17:42:36 -0700
standard and daylight saving time the abbreviations are AEST and AEDT
instead of the former EST for both; similarly, ACST/ACDT, ACWST/ACWDT,
and AWST/AWDT are now used instead of the former CST, CWST, and WST.
This change does not affect UTC offsets, only time zone abbreviations.
This change does not affect UT offsets, only time zone abbreviations.
(Thanks to Rich Tibbett and many others.)
Asia/Novokuznetsk shifts from NOVT to KRAT (remaining on UT +07)
@ -1516,8 +1658,8 @@ Release 2014f - 2014-08-05 17:42:36 -0700
Treindl sent helpful translations of two papers by Guo Qingsheng.)
Some zones have been turned into links, when they differed from existing
zones only for older UTC offsets where data entries were likely invented.
These changes affect UTC offsets in pre-1970 timestamps only. This is
zones only for older UT offsets where data entries were likely invented.
These changes affect UT offsets in pre-1970 timestamps only. This is
similar to the change in release 2013e, except this time for western
Africa. The affected zones are: Africa/Bamako, Africa/Banjul,
Africa/Conakry, Africa/Dakar, Africa/Freetown, Africa/Lome,

4
lib/libc/time/README
View File

@ -11,14 +11,14 @@ changes made by political bodies to time zone boundaries, UTC offsets,
and daylight-saving rules.
See <https://www.iana.org/time-zones/repository/tz-link.html> or the
file tz-link.htm for how to acquire the code and data. Once acquired,
file tz-link.html for how to acquire the code and data. Once acquired,
read the comments in the file '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
$HOME/tzdir/usr/bin/zdump -v America/Los_Angeles
Historical local time information has been included here to:

8
lib/libc/time/ctime.3
View File

@ -1,8 +1,8 @@
.\" $NetBSD: ctime.3,v 1.55 2017/10/24 17:38:17 christos Exp $
.\" $NetBSD: ctime.3,v 1.56 2018/01/25 22:48:42 christos Exp $
.\"
.\" XXX: License missing?
.\"
.Dd October 24, 2017
.Dd January 25, 2018
.Dt CTIME 3
.Os
.Sh NAME
@ -163,7 +163,7 @@ If
.Fa zone
is
.Dv NULL ,
UTC is used; otherwise,
UT is used; otherwise,
.Fa zone
should have been allocated by
.Fn tzalloc
@ -444,6 +444,8 @@ function returns string containing the name of the timezone given in
local time zone file
.It Pa /usr/share/zoneinfo
time zone information directory
.\" .It Pa usr/share/zoneinfo/localtime
.\" local time zone file
.It Pa /usr/share/zoneinfo/posixrules
used with POSIX-style TZ's
.It Pa /usr/share/zoneinfo/GMT

6
lib/libc/time/localtime.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: localtime.c,v 1.110 2017/10/27 08:43:11 kre Exp $ */
/* $NetBSD: localtime.c,v 1.111 2018/01/25 22:48:42 christos Exp $ */
/*
** This file is in the public domain, so clarified as of
@ -10,7 +10,7 @@
#if 0
static char elsieid[] = "@(#)localtime.c 8.17";
#else
__RCSID("$NetBSD: localtime.c,v 1.110 2017/10/27 08:43:11 kre Exp $");
__RCSID("$NetBSD: localtime.c,v 1.111 2018/01/25 22:48:42 christos Exp $");
#endif
#endif /* LIBC_SCCS and not lint */
@ -2116,7 +2116,7 @@ again:
&& ((/*CONSTCOND*/BIGGEST (INT_FAST32_MIN, LONG_MIN)
+ yourtm.TM_GMTOFF)
<= mytm.TM_GMTOFF)))) {
/* MYTM matches YOURTM except with the wrong UTC offset.
/* MYTM matches YOURTM except with the wrong UT offset.
YOURTM.TM_GMTOFF is plausible, so try it instead.
It's OK if YOURTM.TM_GMTOFF contains uninitialized data,
since the guess gets checked. */

146
lib/libc/time/theory.html
View File

@ -52,6 +52,10 @@ However, the database is not designed for and does not suffice for
applications requiring accurate handling of all past times everywhere,
as it would take far too much effort and guesswork to record all
details of pre-1970 civil timekeeping.
Athough some information outside the scope of the database is
collected in a file <code>backzone</code> that is distributed along
with the database proper, this file is less reliable and does not
necessarily follow database guidelines.
</p>
<p>
@ -240,7 +244,7 @@ to name time
zone rules. It is intended to be an exhaustive list of names for
geographic regions as described above; this is a subset of the names
in the data. Although a '<code>zone1970.tab</code>' location's longitude
corresponds to its LMT offset with one hour for every 15 degrees east
corresponds to its LMT offset with one hour for every 15&deg; east
longitude, this relationship is not exact.
</p>
@ -279,7 +283,7 @@ Here are the general rules used for choosing time zone abbreviations,
in decreasing order of importance:
<ul>
<li>
Use three or more characters that are ASCII alphanumerics or
Use three to six characters that are ASCII alphanumerics or
'<code>+</code>' or '<code>-</code>'.
Previous editions of this database also used characters like
'<code> </code>' and '<code>?</code>', but these
@ -297,7 +301,7 @@ in decreasing order of importance:
'<code>+</code>' and '<code>-</code>' are safe in all locales.
In other words, in the C locale the POSIX extended regular
expression <code>[-+[:alnum:]]{3,}</code> should match
expression <code>[-+[:alnum:]]{3,6}</code> should match
the abbreviation.
This guarantees that all abbreviations could have been
specified by a POSIX TZ string.
@ -308,12 +312,96 @@ in decreasing order of importance:
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'.
<p><small>These abbreviations (for standard/daylight/etc. time) are:
ACST/ACDT Australian Central,
AST/ADT/APT/AWT/ADDT Atlantic,
AEST/AEDT Australian Eastern,
AHST/AHDT Alaska-Hawaii,
AKST/AKDT Alaska,
AWST/AWDT Australian Western,
BST/BDT Bering,
CAT/CAST Central Africa,
CET/CEST/CEMT Central European,
ChST Chamorro,
CST/CDT/CWT/CPT/CDDT Central [North America],
CST/CDT China,
GMT/BST/IST/BDST Greenwich,
EAT East Africa,
EST/EDT/EWT/EPT/EDDT Eastern [North America],
EET/EEST Eastern European,
GST Guam,
HST/HDT Hawaii,
HKT/HKST Hong Kong,
IST India,
IST/GMT Irish,
IST/IDT/IDDT Israel,
JST/JDT Japan,
KST/KDT Korea,
MET/MEST Middle European (a backward-compatibility alias for Central European),
MSK/MSD Moscow,
MST/MDT/MWT/MPT/MDDT Mountain,
NST/NDT/NWT/NPT/NDDT Newfoundland,
NST/NDT/NWT/NPT Nome,
NZMT/NZST New Zealand through 1945,
NZST/NZDT New Zealand 1946&ndash;present,
PKT/PKST Pakistan,
PST/PDT/PWT/PPT/PDDT Pacific,
SAST South Africa,
SST Samoa,
WAT/WAST West Africa,
WET/WEST/WEMT Western European,
WIB Waktu Indonesia Barat,
WIT Waktu Indonesia Timur,
WITA Waktu Indonesia Tengah,
YST/YDT/YWT/YPT/YDDT Yukon</small>.</p>
</li>
<li>
For zones whose times are taken from a city's longitude, use the
traditional <var>x</var>MT notation, e.g. 'PMT' for
Paris Mean Time.
The only name like this in current use is 'GMT'.
traditional <var>x</var>MT notation. The only abbreviation like this
in current use is 'GMT'. The others are for timestamps before 1960,
except that Monrovia Mean Time persisted until 1972. Typically,
numeric abbreviations (e.g., '<code>-</code>004430' for MMT) would
cause trouble here, as the numeric strings would exceed the POSIX length limit.
<p><small>These abbreviations are:
AMT Amsterdam, Asunción, Athens;
BMT Baghdad, Bangkok, Batavia, Bern, Bogotá, Bridgetown, Brussels, Bucharest;
CMT Calamarca, Caracas, Chisinau, Colón, Copenhagen, Córdoba;
DMT Dublin/Dunsink;
EMT Easter;
FFMT Fort-de-France;
FMT Funchal;
GMT Greenwich;
HMT Havana, Helsinki, Horta, Howrah;
IMT Irkutsk, Istanbul;
JMT Jerusalem;
KMT Kaunas, Kiev, Kingston;
LMT Lima, Lisbon, local, Luanda;
MMT Macassar, Madras, Malé, Managua, Minsk, Monrovia, Montevideo, Moratuwa,
Moscow;
PLMT Phù Liễn;
PMT Paramaribo, Paris, Perm, Pontianak, Prague;
PMMT Port Moresby;
QMT Quito;
RMT Rangoon, Riga, Rome;
SDMT Santo Domingo;
SJMT San José;
SMT Santiago, Simferopol, Singapore, Stanley;
TBMT Tbilisi;
TMT Tallinn, Tehran;
WMT Warsaw</small>.</p>
<p><small>A few abbreviations also follow the pattern that
GMT/BST established for time in the UK. They are:
CMT/BST for Calamarca Mean Time and Bolivian Summer Time
1890&ndash;1932, DMT/IST for Dublin/Dunsink Mean Time and Irish Summer Time
1880&ndash;1916, MMT/MST/MDST for Moscow 1880&ndash;1919, and RMT/LST
for Riga Mean Time and Latvian Summer time 1880&ndash;1926.
An extra-special case is SET for Swedish Time (<em>svensk
normaltid</em>) 1879&ndash;1899, 3&deg; west of the Stockholm
Observatory.</small></p>
</li>
<li>
Use 'LMT' for local mean time of locations before the introduction
@ -340,32 +428,6 @@ in decreasing order of importance:
history tends to use numeric abbreviations and a particular
entry could go either way, use a numeric abbreviation.
</li>
</ul>
[The remaining guidelines predate the introduction of <code>%z</code>.
They are problematic as they mean tz data entries invent
notation rather than record it. These guidelines are now
deprecated and the plan is to gradually move to <code>%z</code> for
inhabited locations and to "<code>-</code>00" for uninhabited locations.]
<ul>
<li>
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:
<ul>
<li>
When a country is identified with a single or principal zone,
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.
</li>
<li>
Otherwise, take the first three letters of an English place
name identifying each zone and append 'T', 'ST', etc.
as before; e.g. 'CHAST' for CHAtham Summer Time.
</li>
</ul>
</li>
<li>
Use UT (with time zone abbreviation '<code>-</code>00') for
locations while uninhabited. The leading
@ -376,10 +438,10 @@ in decreasing order of importance:
</ul>
<p>
Application writers should note that these abbreviations are ambiguous
in practice: e.g. 'CST' has a different meaning in China than
it does in the United States. In new applications, it's often better
to use numeric UT offsets like '<code>-</code>0600' instead of time zone
abbreviations like 'CST'; this avoids the ambiguity.
in practice: e.g., 'CST' means one thing in China and something else
in North America, and 'IST' can refer to time in India, Ireland or
Israel. To avoid ambiguity, use numeric UT offsets like
'<code>-</code>0600' instead of time zone abbreviations like 'CST'.
</p>
</section>
@ -388,7 +450,7 @@ abbreviations like 'CST'; this avoids the ambiguity.
<h2 id="accuracy">Accuracy of the tz database</h2>
<p>
The tz database is not authoritative, and it surely has errors.
Corrections are welcome and encouraged; see the file CONTRIBUTING.
Corrections are welcome and encouraged; see the file <code>CONTRIBUTING</code>.
Users requiring authoritative data should consult national standards
bodies and the references cited in the database's comments.
</p>
@ -598,7 +660,7 @@ POSIX has the following properties and limitations.
and daylight saving time (DST) zone names.
Starting with POSIX.1-2001, <var>std</var>
and <var>dst</var> may also be
in a quoted form like '<code>&lt;UTC+10&gt;</code>'; this allows
in a quoted form like '<code>&lt;+09&gt;</code>'; this allows
"<code>+</code>" and "<code>-</code>" in the names.
</dd>
<dt><var>offset</var></dt><dd>
@ -646,7 +708,7 @@ POSIX has the following properties and limitations.
</dd>
</dl>
Here is an example POSIX TZ string for New Zealand after 2007.
It says that standard time (NZST) is 12 hours ahead of UTC,
It says that standard time (NZST) is 12 hours ahead of UT,
and that daylight saving time (NZDT) is observed from September's
last Sunday at 02:00 until April's first Sunday at 03:00:
@ -678,7 +740,7 @@ POSIX has the following properties and limitations.
applications that an administrator wants used only at certain
times &ndash;
without regard to whether the user has fiddled the TZ environment
variable. While an administrator can "do everything in UTC" to get
variable. While an administrator can "do everything in UT" 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.)
@ -902,7 +964,7 @@ Interface changes in a release attempt to preserve compatibility with
recent releases. For example, tz data files typically do not rely on
recently-added <code>zic</code> features, so that users can run
older <code>zic</code> versions to process newer data
files. <a href="tz-link.htm">Sources for time zone and daylight
files. <a href="tz-link.html">Sources for time zone and daylight
saving time data</a> describes how
releases are tagged and distributed.
</p>
@ -1003,7 +1065,7 @@ Sources:
Michael Allison and Robert Schmunk,
"<a href="https://www.giss.nasa.gov/tools/mars24/help/notes.html">Technical
Notes on Mars Solar Time as Adopted by the Mars24 Sunclock</a>"
(2012-08-08).
(2015-06-30).
</li>
<li>
Jia-Rui Chong,

2
lib/libc/time/tz-how-to.html
View File

@ -12,7 +12,7 @@ Database</a> Source Files</h2>
<h3>by Bill Seymour</h3>
<p>This page uses the <code>America/Chicago</code> and
<code>Pacific/Honolulu</code> zones as examples of how to infer
times of day from the <a href="tz-link.htm">tz database</a>
times of day from the <a href="tz-link.html">tz database</a>
source files. It might be helpful, but not absolutely necessary,
for the reader to have already downloaded the
latest release of the database and become familiar with the basic layout

4
lib/libc/time/tzselect.8
View File

@ -1,4 +1,4 @@
.\" $NetBSD: tzselect.8,v 1.6 2014/08/15 11:04:07 christos Exp $
.\" $NetBSD: tzselect.8,v 1.7 2018/01/25 22:48:42 christos Exp $
.\"
.TH TZSELECT 8
.SH NAME
@ -90,7 +90,7 @@ program (default:
.TP
\f3TZDIR\fP
Name of the directory containing time zone data files (default:
.BR /usr/local/etc/zoneinfo ).
.BR /usr/share/zoneinfo ).
.SH FILES
.TP
\f2TZDIR\fP\f3/iso3166.tab\fP

8
lib/libc/time/tzselect.ksh
View File

@ -1,6 +1,6 @@
#! /bin/bash
#
# $NetBSD: tzselect.ksh,v 1.16 2017/10/24 17:38:17 christos Exp $
# $NetBSD: tzselect.ksh,v 1.17 2018/01/25 22:48:42 christos Exp $
#
PKGVERSION='(tzcode) '
TZVERSION=see_Makefile
@ -344,8 +344,10 @@ while
while
echo >&2 'Please enter the desired value' \
'of the TZ environment variable.'
echo >&2 'For example, GST-10 is a zone named GST' \
'that is 10 hours ahead (east) of UTC.'
echo >&2 'For example, AEST-10 is a zone named AEST' \
'that is 10 hours'
echo >&2 'ahead (east) of Greenwich,' \
'with no daylight saving time.'
read TZ
$AWK -v TZ="$TZ" 'BEGIN {
tzname = "(<[[:alnum:]+-]{3,}>|[[:alpha:]]{3,})"

26
lib/libc/time/tzset.3
View File

@ -1,5 +1,5 @@
.\" $NetBSD: tzset.3,v 1.36 2017/07/03 21:32:50 wiz Exp $
.Dd October 6, 2016
.\" $NetBSD: tzset.3,v 1.37 2018/01/25 22:48:42 christos Exp $
.Dd January 25, 2018
.Dt TZSET 3
.Os
.Sh NAME
@ -116,7 +116,7 @@ If the implied call to
.Fn tzalloc
fails,
.Fn tzset
falls back on UTC.
falls back on Universal Time (UT).
If
.Ev TZ
is
@ -131,7 +131,7 @@ is used by
If
.Ev TZ
appears in the environment but its value is the empty string,
Universal Time (UT) is used, with the abbreviation
UT is used, with the abbreviation
.Dq UTC
and without leap second correction; please see
.Xr ctime 3 .
@ -335,19 +335,19 @@ extensions to POSIX.
.Bl -tag
.It EST5
stands for US Eastern Standard
Time (EST), 5 hours behind UTC, without daylight saving.
Time (EST), 5 hours behind UT, without daylight saving.
.It FJT\-12FJST,M11.1.0,M1.3.4/75
stands for Fiji Time (FJT) and Fiji Summer Time (FJST), 12 hours ahead
of UTC, springing forward on November's first Sunday at 02:00, and
of UT, springing forward on November's first Sunday at 02:00, and
falling back on January's third Thursday at 75:00 (i.e., 03:00 on the
first Sunday on or after January 18).
.It IST\-2IDT,M3.4.4/26,M10.5.0
stands for Israel Standard Time (IST) and Israel Daylight Time (IDT),
2 hours ahead of UTC, springing forward on March's fourth
2 hours ahead of UT, springing forward on March's fourth
Thursday at 26:00 (i.e., 02:00 on the first Friday on or after March
23), and falling back on October's last Sunday at 02:00.
.It WART4WARST,J1/0,J365/25
stands for Western Argentina Summer Time (WARST), 3 hours behind UTC.
stands for Western Argentina Summer Time (WARST), 3 hours behind UT.
There is a dummy fall-back transition on December 31 at 25:00 daylight
saving time (i.e., 24:00 standard time, equivalent to January 1 at
00:00 standard time), and a simultaneous spring-forward transition on
@ -357,9 +357,9 @@ all year and the initial
is a placeholder.
.It WGT3WGST,M3.5.0/\-2,M10.5.0/\-1
stands for Western Greenland Time (WGT) and Western Greenland Summer
Time (WGST), 3 hours behind UTC, where clocks follow the EU rules of
springing forward on March's last Sunday at 01:00 UTC (\-02:00 local
time) and falling back on October's last Sunday at 01:00 UTC
Time (WGST), 3 hours behind UT, where clocks follow the EU rules of
springing forward on March's last Sunday at 01:00 UT (\-02:00 local
time) and falling back on October's last Sunday at 01:00 UT
(\-01:00 local time).
.El
.Pp
@ -373,7 +373,7 @@ format file
.Pa posixrules
in
.Pa /usr/share/zoneinfo
are used, with the standard and summer time offsets from UTC replaced
are used, with the standard and summer time offsets from UT replaced
by those specified by the
.Cm offset
values in
@ -389,6 +389,8 @@ from the rest of the specification.
local time zone file
.It Pa /usr/share/zoneinfo
time zone information directory
\" .It Pa /usr/share/zoneinfo/localtime
\" local time zone file
.It Pa /usr/share/zoneinfo/posixrules
used with POSIX-style TZ's
.It Pa /usr/share/zoneinfo/GMT

2
lib/libc/time/version
View File

@ -1 +1 @@
2017c
2018c

57
lib/libc/time/zdump.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: zdump.c,v 1.47 2017/10/24 17:38:17 christos Exp $ */
/* $NetBSD: zdump.c,v 1.48 2018/01/25 22:48:42 christos Exp $ */
/*
** This file is in the public domain, so clarified as of
** 2009-05-17 by Arthur David Olson.
@ -6,7 +6,7 @@
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: zdump.c,v 1.47 2017/10/24 17:38:17 christos Exp $");
__RCSID("$NetBSD: zdump.c,v 1.48 2018/01/25 22:48:42 christos Exp $");
#endif /* !defined lint */
/*
@ -268,7 +268,7 @@ tzfree(timezone_t env)
}
#endif /* ! USE_LOCALTIME_RZ */
/* A UTC time zone, and its initializer. */
/* A UT time zone, and its initializer. */
static timezone_t gmtz;
static void
gmtzinit(void)
@ -282,7 +282,7 @@ gmtzinit(void)
}
}
/* Convert *TP to UTC, storing the broken-down time into *TMP.
/* Convert *TP to UT, storing the broken-down time into *TMP.
Return TMP if successful, NULL otherwise. This is like gmtime_r(TP, TMP),
except typically faster if USE_LOCALTIME_RZ. */
static struct tm *
@ -552,6 +552,7 @@ main(int argc, char *argv[])
}
if (t < cutlotime)
t = cutlotime;
INITIALIZE (ab);
tm_ok = my_localtime_rz(tz, &t, &tm) != NULL;
if (tm_ok) {
ab = saveabbr(&abbrev, &abbrevsize, &tm);
@ -567,11 +568,10 @@ main(int argc, char *argv[])
? t + SECSPERDAY / 2 : cuthitime);
struct tm *newtmp = localtime_rz(tz, &newt, &newtm);
bool newtm_ok = newtmp != NULL;
if (! (tm_ok & newtm_ok
? (delta(&newtm, &tm) == newt - t
&& newtm.tm_isdst == tm.tm_isdst
&& strcmp(abbr(&newtm), ab) == 0)
: tm_ok == newtm_ok)) {
if (tm_ok != newtm_ok
|| (tm_ok && (delta(&newtm, &tm) != newt - t
|| newtm.tm_isdst != tm.tm_isdst
|| strcmp(abbr(&newtm), ab) != 0))) {
newt = hunt(tz, argv[i], t, newt);
newtmp = localtime_rz(tz, &newt, &newtm);
newtm_ok = newtmp != NULL;
@ -733,8 +733,8 @@ adjusted_yday(struct tm const *a, struct tm const *b)
}
#endif
/* If A is the broken-down local time and B the broken-down UTC for
the same instant, return A's UTC offset in seconds, where positive
/* If A is the broken-down local time and B the broken-down UT for
the same instant, return A's UT offset in seconds, where positive
offsets are east of Greenwich. On failure, return LONG_MIN.
If T is nonnull, *T is the timestamp that corresponds to A; call
@ -798,12 +798,14 @@ show(timezone_t tz, char *zone, time_t t, bool v)
abbrok(abbr(tmp), zone);
}
#if !HAVE_SNPRINTF
#if HAVE_SNPRINTF
# define my_snprintf snprintf
#else
# include <stdarg.h>
/* A substitute for snprintf that is good enough for zdump. */
static int
snprintf(char *s, size_t size, char const *format, ...)
static int ATTRIBUTE_FORMAT((printf, 3, 4))
my_snprintf(char *s, size_t size, char const *format, ...)
{
int n;
va_list args;
@ -842,16 +844,16 @@ format_local_time(char *buf, size_t size, struct tm const *tm)
{
int ss = tm->tm_sec, mm = tm->tm_min, hh = tm->tm_hour;
return (ss
? snprintf(buf, size, "%02d:%02d:%02d", hh, mm, ss)
? my_snprintf(buf, size, "%02d:%02d:%02d", hh, mm, ss)
: mm
? snprintf(buf, size, "%02d:%02d", hh, mm)
: snprintf(buf, size, "%02d", hh));
? my_snprintf(buf, size, "%02d:%02d", hh, mm)
: my_snprintf(buf, size, "%02d", hh));
}
/* Store into BUF, of size SIZE, a formatted UTC offset for the
/* Store into BUF, of size SIZE, a formatted UT offset for the
localtime *TM corresponding to time T. Use ISO 8601 format
+HHMMSS, or -HHMMSS for timestamps west of Greenwich; use the
format -00 for unknown UTC offsets. If the hour needs more than
format -00 for unknown UT offsets. If the hour needs more than
two digits to represent, extend the length of HH as needed.
Otherwise, omit SS if SS is zero, and omit MM too if MM is also
zero.
@ -880,10 +882,10 @@ format_utc_offset(char *buf, size_t size, struct tm const *tm, time_t t)
mm = off / 60 % 60;
hh = off / 60 / 60;
return (ss || 100 <= hh
? snprintf(buf, size, "%c%02ld%02d%02d", sign, hh, mm, ss)
? my_snprintf(buf, size, "%c%02ld%02d%02d", sign, hh, mm, ss)
: mm
? snprintf(buf, size, "%c%02ld%02d", sign, hh, mm)
: snprintf(buf, size, "%c%02ld", sign, hh));
? my_snprintf(buf, size, "%c%02ld%02d", sign, hh, mm)
: my_snprintf(buf, size, "%c%02ld", sign, hh));
}
/* Store into BUF (of size SIZE) a quoted string representation of P.
@ -926,7 +928,7 @@ format_quoted_string(char *buf, size_t size, char const *p)
%f zone name
%L local time as per format_local_time
%Q like "U\t%Z\tD" where U is the UTC offset as for format_utc_offset
%Q like "U\t%Z\tD" where U is the UT offset as for format_utc_offset
and D is the isdst flag; except omit D if it is zero, omit %Z if
it equals U, quote and escape %Z if it contains nonalphabetics,
and omit any trailing tabs. */
@ -986,15 +988,16 @@ istrftime(char *buf, size_t size, char const *time_fmt,
for (abp = ab; is_alpha(*abp); abp++)
continue;
len = (!*abp && *ab
? (size_t)snprintf(b, s, "%s", ab)
? (size_t)my_snprintf(b, s, "%s", ab)
: format_quoted_string(b, s, ab));
if (s <= len)
return false;
b += len, s -= len;
}
formatted_len = (tm->tm_isdst
? snprintf(b, s, &"\t\t%d"[show_abbr], tm->tm_isdst)
: 0);
formatted_len
= (tm->tm_isdst
? my_snprintf(b, s, &"\t\t%d"[show_abbr], tm->tm_isdst)
: 0);
}
break;
}

145
lib/libc/time/zic.8
View File

@ -1,5 +1,5 @@
.\" $NetBSD: zic.8,v 1.27 2017/10/24 17:38:17 christos Exp $
.Dd October 24, 2017
.\" $NetBSD: zic.8,v 1.28 2018/01/25 22:48:42 christos Exp $
.Dd January 25, 2018
.Dt ZIC 8
.Os
.Sh NAME
@ -13,6 +13,7 @@
.Op Fl l Ar localtime
.Op Fl p Ar posixrules
.Op Fl s
.Op Fl t Ar file
.Op Fl v
.Op Fl y Ar command
.Op Ar Filename ...
@ -52,35 +53,49 @@ will act as if the input contained a link line of the form
Limit time values stored in output files to values that are the same
whether they're taken to be signed or unsigned.
You can use this option to generate SVVS-compatible files.
.It Fl t Ar file
When creating local time information, put the configuration link in
the named file rather than in the standard location.
.It Fl v
Be more verbose, and complain about the following situations:
.Bl -dash
.It The input specifies a link to a link.
.It A year that appears in a data file is outside the range
.It A time of 24:00 or more appears in the input.
.It
The input specifies a link to a link.
.It
A year that appears in a data file is outside the range
of years representable by
.Xr time 2
values.
.It
A time of 24:00 or more appears in the input.
Pre-1998 versions of
.Xr zic 8
prohibit 24:00, and pre-2007 versions prohibit times greater than 24:00.
.It A rule goes past the start or end of the month.
.It
A rule goes past the start or end of the month.
Pre-2004 versions of
.Xr zic 8
prohibit this.
.It The output file does not contain all the information about the
.It
The output file does not contain all the information about the
long-term future of a zone, because the future cannot be summarized as
an extended POSIX TZ string.
For example, as of 2013 this problem
occurs for Iran's daylight-saving rules for the predicted future, as
these rules are based on the Iranian calendar, which cannot be
represented.
.It The output contains data that may not be handled properly by client
.It
The output contains data that may not be handled properly by client
code designed for older
.Xr zic 8
output formats.
These compatibility issues affect only time stamps
before 1970 or after the start of 2038.
.It A time zone abbreviation has fewer than 3 characters.
.It
A time zone abbreviation has fewer than 3 characters.
POSIX requires at least 3.
.It An output file name contains a byte that is not an ASCII letter,
.It
An output file name contains a byte that is not an ASCII letter,
.Dq - ,
.Dq / ,
or
@ -90,6 +105,7 @@ or it contains a file name component that contains more than 14 bytes
or that starts with
.Dq - .
.El
.El
.Pp
Input files should be text files, that is, they should be a series of
zero or more lines, each ending in a newline byte and containing at
@ -99,7 +115,9 @@ bytes.
The input text's encoding
is typically UTF-8 or ASCII; it should have a unibyte representation
for the POSIX Portable Character Set (PPCS)
.Rs
.%U http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap06.html
.Re
and the encoding's non-unibyte characters should consist entirely of
non-PPCS bytes.
Non-PPCS characters typically occur only in comments:
@ -137,22 +155,27 @@ A name can be abbreviated by omitting all but an initial prefix; any
abbreviation must be unambiguous in context.
.Pp
A rule line has the form
.Dl Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
.Pp
.Dl Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
.Pp
For example:
.Pp
.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" -compact
.Bl -tag -width "LETTER/S"
.It NAME
Gives the (arbitrary) name of the set of rules this rule is part of.
.It FROM
Gives the first year in which the rule applies.
Any integer year can be supplied; the proleptic Gregorian calendar is assumed.
Any signed integer year can be supplied; the proleptic Gregorian calendar
is assumed, with year 0 preceding year 1.
The word
.Em minimum
(or an abbreviation) means the minimum year representable as an integer.
(or an abbreviation) means the indefinite past.
The word
.Em maximum
(or an abbreviation) means the maximum year representable as an integer.
(or an abbreviation) means the indefinite future.
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.
@ -181,6 +204,7 @@ Month names may be abbreviated.
.It ON
Gives 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
@ -193,6 +217,7 @@ first Sunday on or after the eighth
.It Sun\*[Le]25
last Sunday on or before the 25th
.El
.Pp
Names of days of the week may be abbreviated or spelled out in full.
A weekday name (e.g.,
.Dq Sunday )
@ -207,18 +232,24 @@ field.
.It AT
Gives the time of day at which the rule takes effect.
Recognized forms include:
.Bl -tag -width "1X28X14" -compact -offset indent
.Pp
.Bl -tag -width "01X28X14" -compact -offset indent
.It 2
time in hours
.It 2:00
time in hours and minutes
.It 01:28:14
time in hours, minutes, and seconds
.It 15:00
24-hour format time (for times after noon)
.It 1:28:14
time in hours, minutes, and seconds
.It 260:00
260 hours after 00:00
.It \-2:30
2.5 hours before 00:00
.It \-
equivalent to 0
.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
@ -249,10 +280,10 @@ This field has the same format as the
.Em AT
field
(although, of course, the
.Em w
and
.Em s
suffixes are not used).
Negative offsets are allowed; in Ireland, for example, daylight saving
time is observed in winter and has a negative offset relative to
Irish Standard Time.
Only the sum of standard time and this amount matters; for example,
.Nm
does not distinguish a 10:30 standard time plus an 0:30
@ -277,12 +308,15 @@ the variable part is null.
.El
.Pp
A zone line has the form
.sp
.Dl Zone NAME GMTOFF RULES/SAVE FORMAT [UNTILYEAR [MONTH [DAY [TIME]]]]
.Pp
.Dl Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL]
.Pp
For example:
.Dl Zone Australia/Adelaide 9:30 Aus AC%sT 1971 Oct 31 2:00
.Pp
.Dl Zone Asia/Amman 2:00 Jordan EE%sT 2017 Oct 27 1:00
.Pp
The fields that make up a zone line are:
.Bl -tag -width "RULES/SAVE" -compact
.Bl -tag -width "RULES/SAVE"
.It NAME
The name of the time zone.
This is the name used in creating the time conversion information file for the
@ -301,8 +335,8 @@ and
.Em SAVE
fields of rule lines;
begin the field with a minus sign if time must be subtracted from UT.
.It RULES/SAVE
The name of the rule(s) that apply in the time zone or,
.It RULES
The name of the rules that apply in the time zone or,
alternatively, an amount of time to add to local standard time.
If this field is
.Em \&-
@ -318,7 +352,7 @@ is used to show where the
of the time zone abbreviation goes.
Alternately, a format can use the pair of characters
.Em %z
+to stand for the UTC offset in the form
+to stand for the UT offset in the form
.Em \(+- hh ,
.Em \(+- hhmm ,
or
@ -328,16 +362,16 @@ using the shortest form that does not lose information, where
.Em mm ,
and
.Em ss
are the hours, minutes, and seconds east (+) or west (\(mi) of UTC.
are the hours, minutes, and seconds east (+) or west (\(mi) of UT.
Alternatively,
a slash
.Pq \&/
separates standard and daylight abbreviations.
To conform to POSIX, a time zone abbreviation should contain only
alphanumeric ASCII characters, "+" and "\*-".
.It UNTILYEAR [MONTH [DAY [TIME]]]
.It UNTIL
The time at which the UT offset or the rule(s) change for a location.
It is specified as a year, a month, a day, and a time of day.
It takes the form of YEAR [MONTH [DAY [TIME]]].
If this is specified,
the time zone information is generated from the given UT offset
and rule change until the time specified, which is interpreted using
@ -345,7 +379,7 @@ the rules in effect just before the transition.
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.
.El
.Pp
The next line must be a
.Dq continuation
line; this has the same form as a zone line except that the
@ -359,6 +393,7 @@ Continuation lines may contain
.Em until
information, just as zone lines do, indicating that the next line is a further
continuation.
.El
.Pp
If a zone changes at the same instant that a rule would otherwise take
effect in the earlier zone or continuation line, the rule is ignored.
@ -366,9 +401,13 @@ In a single zone it is an error if two rules take effect at the same
instant, or if two zone changes take effect at the same instant.
.Pp
A link line has the form
.Dl Link TARGET LINK-NAME
.Pp
.Dl Link TARGET LINK-NAME
.Pp
For example:
.Pp
.Dl Link Europe/Istanbul Asia/Istanbul
.Pp
The
.Em TARGET
field should appear as the
@ -388,9 +427,13 @@ define the same name, or if the source of one link line is the target
of another.
.Pp
Lines in the file that describes leap seconds have the following form:
.Pp
.Dl Leap YEAR MONTH DAY HH:MM:SS CORR R/S
.Pp
For example:
.Dl Leap 1974 Dec 31 23:59:60 + S
.Pp
.Dl Leap 2016 Dec 31 23:59:60 + S
.Pp
The
.Em YEAR ,
.Em MONTH ,
@ -418,12 +461,14 @@ or
.Dq Rolling
if the leap second time given by the other fields should be interpreted as
local wall clock time.
.El
.Sh EXTENDED EXAMPLE
Here is an extended example of
.Ic zic
input, intended to illustrate many of its features.
.Bl -column -compact "# Rule" "Swiss" "FROM" "1995" "TYPE" "Oct" "lastSun" "1:00u" "SAVE" "LETTER/S"
In this example, the EU rules are for the European Union
and for its predecessor organization, the European Communities.
.Pp
.Bl -column -compact -offset indent "# Rule" "Swiss" "FROM" "1995" "TYPE" "Oct" "lastSun" "1:00u" "SAVE" "LETTER/S"
.It # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
.It Rule Swiss 1941 1942 - May Mon>=1 1:00 1:00 S
.It Rule Swiss 1941 1942 - Oct Mon>=1 2:00 0 -
@ -436,27 +481,29 @@ input, intended to illustrate many of its features.
.It Rule EU 1996 max - Oct lastSun 1:00u 0 -
.El
.Pp
.Bl -column -compact "# Zone" "Europe/Zurich" "0:34:08" "RULES/SAVE" "FORMAT" "UNTIL"
.It # Zone NAME GMTOFF RULES/SAVE FORMAT UNTIL
.Bl -column -compact -offset indent "# Zone" "Europe/Zurich" "0:34:08" "RULES/SAVE" "FORMAT" "UNTIL"
.It # Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL]
.It Zone Europe/Zurich 0:34:08 - LMT 1853 Jul 16
.It 0:29:44 - BMT 1894 Jun
.It 1:00 Swiss CE%sT 1981
.It 1:00 EU CE%sT
.It Link Europe/Zurich Switzerland
.Pp
.El
.Bl -column -compact -offset indent "# Zone" "Europe/Zurich" "0:34:08" "RULES/SAVE" "FORMAT" "UNTIL"
.It Link Europe/Zurich Europe/Vaduz
.El
.Pp
In this example, the zone is named Europe/Zurich but it has an alias
as Switzerland.
as Europe/Vaduz.
This example says that Zurich was 34 minutes and 8
seconds west of UT until 1853-07-16 at 00:00, when the legal offset
seconds east of UT until 1853-07-16 at 00:00, when the legal offset
was changed to 7\(de\|26\(fm\|22.50\(sd; although this works out to
0:29:45.50, the input format cannot represent fractional seconds so it
is rounded here.
After 1894-06-01 at 00:00 Swiss daylight saving rules
(defined with lines beginning with "Rule Swiss") apply, and the UT offset
became one hour.
After 1894-06-01 at 00:00 the UT offset became one hour
and Swiss daylight saving rules (defined with lines beginning with "Rule
Swiss") apply.
From 1981 to the present, EU daylight saving rules have
applied, and the UTC offset has remained at one hour.
.Pp
In 1941 and 1942, daylight saving time applied from the first Monday
in May at 01:00 to the first Monday in October at 02:00.
@ -497,8 +544,12 @@ This works around bugs in software that mishandles large negative time stamps.
Call it sour grapes, but pre-Big-Bang time stamps are physically suspect anyway.
The pre-Big-Bang cutoff time is approximate and may change in future versions.
.Sh FILES
.Pa /usr/share/zoneinfo
- standard directory used for created files
.Bl -tag -width /usr/share/zoneinfo -compact
.It Pa /etc/localtime
default local time zone file
.It Pa /usr/share/zoneinfo
standard directory used for created files
.El
.Sh SEE ALSO
.Xr ctime 3 ,
.Xr tzfile 5 ,

31
lib/libc/time/zic.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: zic.c,v 1.69 2017/10/24 17:38:17 christos Exp $ */
/* $NetBSD: zic.c,v 1.70 2018/01/25 22:48:42 christos Exp $ */
/*
** This file is in the public domain, so clarified as of
** 2006-07-17 by Arthur David Olson.
@ -10,7 +10,7 @@
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: zic.c,v 1.69 2017/10/24 17:38:17 christos Exp $");
__RCSID("$NetBSD: zic.c,v 1.70 2018/01/25 22:48:42 christos Exp $");
#endif /* !defined lint */
#include "private.h"
@ -561,7 +561,7 @@ usage(FILE *stream, int status)
fprintf(stream,
_("%s: usage is %s [ --version ] [ --help ] [ -v ] \\\n"
"\t[ -l localtime ] [ -p posixrules ] [ -d directory ] \\\n"
"\t[ -L leapseconds ] [ filename ... ]\n\n"
"\t[ -t localtime-link ] [ -L leapseconds ] [ filename ... ]\n\n"
"Report bugs to %s.\n"),
progname, progname, REPORT_BUGS_TO);
if (status == EXIT_SUCCESS)
@ -593,6 +593,7 @@ static const char * psxrules;
static const char * lcltime;
static const char * directory;
static const char * leapsec;
static const char * tzdefault;
static const char * yitcommand;
int
@ -625,7 +626,7 @@ main(int argc, char **argv)
} else if (strcmp(argv[k], "--help") == 0) {
usage(stdout, EXIT_SUCCESS);
}
while ((c = getopt(argc, argv, "d:l:p:L:vsy:")) != EOF && c != -1)
while ((c = getopt(argc, argv, "d:l:L:p:st:vy:")) != EOF && c != -1)
switch (c) {
default:
usage(stderr, EXIT_FAILURE);
@ -659,6 +660,16 @@ _("%s: More than one -p option specified\n"),
return EXIT_FAILURE;
}
break;
case 't':
if (tzdefault != NULL) {
fprintf(stderr,
_("%s: More than one -t option"
" specified\n"),
progname);
return EXIT_FAILURE;
}
tzdefault = optarg;
break;
case 'y':
if (yitcommand == NULL) {
warning(_("-y is obsolescent"));
@ -691,6 +702,8 @@ _("%s: More than one -L option specified\n"),
usage(stderr, EXIT_FAILURE); /* usage message by request */
if (directory == NULL)
directory = TZDIR;
if (tzdefault == NULL)
tzdefault = TZDEFAULT;
if (yitcommand == NULL)
yitcommand = "yearistype";
@ -727,7 +740,7 @@ _("%s: More than one -L option specified\n"),
}
if (lcltime != NULL) {
eat(_("command line"), 1);
dolink(lcltime, TZDEFAULT, true);
dolink(lcltime, tzdefault, true);
}
if (psxrules != NULL) {
eat(_("command line"), 1);
@ -1262,10 +1275,10 @@ inzone(char **fields, int nfields)
error(_("wrong number of fields on Zone line"));
return false;
}
if (strcmp(fields[ZF_NAME], TZDEFAULT) == 0 && lcltime != NULL) {
if (lcltime != NULL && strcmp(fields[ZF_NAME], tzdefault) == 0) {
error(
_("\"Zone %s\" line and -l option are mutually exclusive"),
TZDEFAULT);
tzdefault);
return false;
}
if (strcmp(fields[ZF_NAME], TZDEFRULES) == 0 && psxrules != NULL) {
@ -1976,7 +1989,7 @@ writezone(const char *const name, const char *const string, char version)
}
#define DO(field) fwrite(tzh.field, sizeof tzh.field, (size_t) 1, fp)
tzh = tzh0;
strncpy(tzh.tzh_magic, TZ_MAGIC, sizeof tzh.tzh_magic);
memcpy(tzh.tzh_magic, TZ_MAGIC, sizeof tzh.tzh_magic);
tzh.tzh_version[0] = version;
convert(thistypecnt, tzh.tzh_ttisgmtcnt);
convert(thistypecnt, tzh.tzh_ttisstdcnt);
@ -2071,7 +2084,7 @@ abbroffset(char *buf, zic_t offset)
minutes = offset % MINSPERHOUR;
offset /= MINSPERHOUR;
if (100 <= offset) {
error(_("%%z UTC offset magnitude exceeds 99:59:59"));
error(_("%%z UT offset magnitude exceeds 99:59:59"));
return "%z";
} else {
char *p = buf;