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[src/trunk]: src/lib/libc/time Welcome to 2022b:
details: https://anonhg.NetBSD.org/src/rev/1de09f119b0b
branches: trunk
changeset: 369415:1de09f119b0b
user: christos <christos%NetBSD.org@localhost>
date: Tue Aug 16 10:56:21 2022 +0000
description:
Welcome to 2022b:
zic has a new option '-R @N' to output explicit transitions < N.
(Need suggested by Almaz Mingaleev.)
'zic -r @N' no longer outputs bad data when N < first transition.
(Problem introduced in 2021d and reported by Peter Krefting.)
zic now checks its input for NUL bytes and unterminated lines, and
now supports input line lengths up to 2048 (not 512) bytes.
gmtime and related code now use the abbreviation "UTC" not "GMT".
POSIX is being revised to require this.
When tzset and related functions set vestigial static variables
like tzname, they now prefer specified timestamps to unspecified ones.
(Problem reported by Almaz Mingaleev.)
zic no longer complains "can't determine time zone abbreviation to
use just after until time" when a transition to a new standard
time occurs simultanously with the first DST fallback transition.
diffstat:
lib/libc/time/Makefile | 164 ++++++++++---
lib/libc/time/NEWS | 117 ++++++++++-
lib/libc/time/asctime.c | 32 +--
lib/libc/time/calendars | 4 +-
lib/libc/time/localtime.c | 112 +++++----
lib/libc/time/private.h | 137 +++++++-----
lib/libc/time/strftime.c | 37 +--
lib/libc/time/theory.html | 14 +-
lib/libc/time/tz-how-to.html | 29 +-
lib/libc/time/tz-link.html | 7 +-
lib/libc/time/tzselect.8 | 18 +-
lib/libc/time/version | 2 +-
lib/libc/time/zdump.c | 18 +-
lib/libc/time/zic.8 | 44 ++-
lib/libc/time/zic.c | 484 ++++++++++++++++++++++++++----------------
15 files changed, 778 insertions(+), 441 deletions(-)
diffs (truncated from 2532 to 300 lines):
diff -r 617295c0b846 -r 1de09f119b0b lib/libc/time/Makefile
--- a/lib/libc/time/Makefile Tue Aug 16 10:47:10 2022 +0000
+++ b/lib/libc/time/Makefile Tue Aug 16 10:56:21 2022 +0000
@@ -33,7 +33,7 @@
# make zonenames
# to get a list of the values you can use for LOCALTIME.
-LOCALTIME= GMT
+LOCALTIME= Factory
# The POSIXRULES macro controls interpretation of nonstandard and obsolete
# POSIX-like TZ settings like TZ='EET-2EEST' that lack DST transition rules.
@@ -176,12 +176,19 @@
BACKWARD= backward
-# If you want out-of-scope and often-wrong data from the file 'backzone', use
+# If you want out-of-scope and often-wrong data from the file 'backzone',
+# but only for entries listed in the backward-compatibility file zone.tab, use
# PACKRATDATA= backzone
+# PACKRATLIST= zone.tab
+# If you want all the 'backzone' data, use
+# PACKRATDATA= backzone
+# PACKRATLIST=
# To omit this data, use
# PACKRATDATA=
+# PACKRATLIST=
PACKRATDATA=
+PACKRATLIST=
# The name of a locale using the UTF-8 encoding, used during self-tests.
# The tests are skipped if the name does not appear to work on this system.
@@ -264,7 +271,7 @@
$(GCC_INSTRUMENT) \
-Wall -Wextra \
-Walloc-size-larger-than=100000 -Warray-bounds=2 \
- -Wbad-function-cast -Wcast-align=strict -Wdate-time \
+ -Wbad-function-cast -Wbidi-chars=any,ucn -Wcast-align=strict -Wdate-time \
-Wdeclaration-after-statement -Wdouble-promotion \
-Wduplicated-branches -Wduplicated-cond \
-Wformat=2 -Wformat-overflow=2 -Wformat-signedness -Wformat-truncation \
@@ -278,7 +285,7 @@
-Wsuggest-attribute=const -Wsuggest-attribute=format \
-Wsuggest-attribute=malloc \
-Wsuggest-attribute=noreturn -Wsuggest-attribute=pure \
- -Wtrampolines -Wundef -Wuninitialized -Wunused-macros \
+ -Wtrampolines -Wundef -Wuninitialized -Wunused-macros -Wuse-after-free=3 \
-Wvariadic-macros -Wvla -Wwrite-strings \
-Wno-address -Wno-format-nonliteral -Wno-sign-compare \
-Wno-type-limits -Wno-unused-parameter
@@ -448,6 +455,9 @@
# useful in commentary.
UNUSUAL_OK_CHARSET= $(UNUSUAL_OK_LATIN_1)$(UNUSUAL_OK_IPA)
+# Put this in a bracket expression to match spaces.
+s = [:space:]
+
# OK_CHAR matches any character allowed in the distributed files.
# This is the same as SAFE_CHAR, except that UNUSUAL_OK_CHARSET and
# multibyte letters are also allowed so that commentary can contain a
@@ -521,8 +531,9 @@
ZONETABLES= zone1970.tab zone.tab
TABDATA= iso3166.tab $(TZDATA_TEXT) $(ZONETABLES)
LEAP_DEPS= leapseconds.awk leap-seconds.list
-TZDATA_ZI_DEPS= ziguard.awk zishrink.awk version $(TDATA) $(PACKRATDATA)
-DSTDATA_ZI_DEPS= ziguard.awk $(TDATA) $(PACKRATDATA)
+TZDATA_ZI_DEPS= ziguard.awk zishrink.awk version $(TDATA) \
+ $(PACKRATDATA) $(PACKRATLIST)
+DSTDATA_ZI_DEPS= ziguard.awk $(TDATA) $(PACKRATDATA) $(PACKRATLIST)
DATA= $(TDATA_TO_CHECK) backzone iso3166.tab leap-seconds.list \
leapseconds $(ZONETABLES)
AWK_SCRIPTS= checklinks.awk checktab.awk leapseconds.awk \
@@ -534,8 +545,9 @@
TZS_NEW= to$(TZS_YEAR)new.tzs
TZS_DEPS= $(YDATA) asctime.c localtime.c \
private.h tzfile.h zdump.c zic.c
+TZDATA_DIST = $(COMMON) $(DATA) $(MISC)
# EIGHT_YARDS is just a yard short of the whole ENCHILADA.
-EIGHT_YARDS = $(COMMON) $(DOCS) $(SOURCES) $(DATA) $(MISC) tzdata.zi
+EIGHT_YARDS = $(TZDATA_DIST) $(DOCS) $(SOURCES) tzdata.zi
ENCHILADA = $(EIGHT_YARDS) $(TZS)
# Consult these files when deciding whether to rebuild the 'version' file.
@@ -608,13 +620,17 @@
printf '%s\n' "$$V" >$@.out
mv $@.out $@
-# These files can be tailored by setting BACKWARD and PACKRATDATA.
+# These files can be tailored by setting BACKWARD, PACKRATDATA, PACKRATLIST.
vanguard.zi main.zi rearguard.zi: $(DSTDATA_ZI_DEPS)
- $(AWK) -v DATAFORM=`expr $@ : '\(.*\).zi'` -f ziguard.awk \
+ $(AWK) \
+ -v DATAFORM=`expr $@ : '\(.*\).zi'` \
+ -v PACKRATDATA='$(PACKRATDATA)' \
+ -v PACKRATLIST='$(PACKRATLIST)' \
+ -f ziguard.awk \
$(TDATA) $(PACKRATDATA) >$@.out
mv $@.out $@
# This file has a version comment that attempts to capture any tailoring
-# via BACKWARD, DATAFORM, PACKRATDATA, and REDO.
+# via BACKWARD, DATAFORM, PACKRATDATA, PACKRATLIST, and REDO.
tzdata.zi: $(DATAFORM).zi version zishrink.awk
version=`sed 1q version` && \
LC_ALL=C $(AWK) \
@@ -652,6 +668,7 @@
DESTDIR='$(DESTDIR)' \
LEAPSECONDS='$(LEAPSECONDS)' \
PACKRATDATA='$(PACKRATDATA)' \
+ PACKRATLIST='$(PACKRATLIST)' \
TZDEFAULT='$(TZDEFAULT)' \
TZDIR='$(TZDIR)' \
ZIC='$(ZIC)'
@@ -690,11 +707,6 @@
$(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.
-posix_packrat: $(INSTALL_DATA_DEPS)
- $(MAKE) $(INSTALLARGS) PACKRATDATA=backzone posix_only
-
zones: $(REDO)
# dummy.zd is not a real file; it is mentioned here only so that the
@@ -755,8 +767,8 @@
mv $@.out $@
check: check_character_set check_white_space check_links \
- check_name_lengths check_sorted \
- check_tables check_web check_zishrink check_tzs
+ check_name_lengths check_slashed_abbrs check_sorted \
+ check_tables check_web check_ziguard check_zishrink check_tzs
check_character_set: $(ENCHILADA)
test ! '$(UTF8_LOCALE)' || \
@@ -780,19 +792,28 @@
patfmt=' \t|[\f\r\v]' && pat=`printf "$$patfmt\\n"` && \
! grep -En "$$pat" \
$$(ls $(ENCHILADA) | grep -Fvx leap-seconds.list)
- ! grep -n '[[:space:]]$$' \
+ ! grep -n '[$s]$$' \
$$(ls $(ENCHILADA) | grep -Fvx leap-seconds.list)
touch $@
-PRECEDES_FILE_NAME = ^(Zone|Link[[:space:]]+[^[:space:]]+)[[:space:]]+
-FILE_NAME_COMPONENT_TOO_LONG = \
- $(PRECEDES_FILE_NAME)[^[:space:]]*[^/[:space:]]{15}
+PRECEDES_FILE_NAME = ^(Zone|Link[$s]+[^$s]+)[$s]+
+FILE_NAME_COMPONENT_TOO_LONG = $(PRECEDES_FILE_NAME)[^$s]*[^/$s]{15}
check_name_lengths: $(TDATA_TO_CHECK) backzone
! grep -En '$(FILE_NAME_COMPONENT_TOO_LONG)' \
$(TDATA_TO_CHECK) backzone
touch $@
+PRECEDES_STDOFF = ^(Zone[$s]+[^$s]+)?[$s]+
+STDOFF = [-+]?[0-9:.]+
+RULELESS_SAVE = (-|$(STDOFF)[sd]?)
+RULELESS_SLASHED_ABBRS = \
+ $(PRECEDES_STDOFF)$(STDOFF)[$s]+$(RULELESS_SAVE)[$s]+[^$s]*/
+
+check_slashed_abbrs: $(TDATA_TO_CHECK)
+ ! grep -En '$(RULELESS_SLASHED_ABBRS)' $(TDATA_TO_CHECK)
+ touch $@
+
CHECK_CC_LIST = { n = split($$1,a,/,/); for (i=2; i<=n; i++) print a[1], a[i]; }
check_sorted: backward backzone iso3166.tab zone.tab zone1970.tab
@@ -832,11 +853,19 @@
test ! -s $@.out || { cat $@.out; exit 1; }
mv $@.out $@
+check_ziguard: rearguard.zi vanguard.zi ziguard.awk
+ $(AWK) -v DATAFORM=rearguard -f ziguard.awk vanguard.zi | \
+ diff -u rearguard.zi -
+ $(AWK) -v DATAFORM=vanguard -f ziguard.awk rearguard.zi | \
+ diff -u vanguard.zi -
+ touch $@
+
# Check that zishrink.awk does not alter the data, and that ziguard.awk
# preserves main-format data.
check_zishrink: check_zishrink_posix check_zishrink_right
check_zishrink_posix check_zishrink_right: \
- zic leapseconds $(PACKRATDATA) $(TDATA) $(DATAFORM).zi tzdata.zi
+ zic leapseconds $(PACKRATDATA) $(PACKRATLIST) \
+ $(TDATA) $(DATAFORM).zi tzdata.zi
rm -fr $@.dir $@-t.dir $@-shrunk.dir
mkdir $@.dir $@-t.dir $@-shrunk.dir
case $@ in \
@@ -845,8 +874,8 @@
esac && \
$(ZIC) $$leap -d $@.dir $(DATAFORM).zi && \
$(ZIC) $$leap -d $@-shrunk.dir tzdata.zi && \
- case $(DATAFORM) in \
- main) \
+ case $(DATAFORM),$(PACKRATLIST) in \
+ main,) \
$(ZIC) $$leap -d $@-t.dir $(TDATA) && \
$(AWK) '/^Rule/' $(TDATA) | \
$(ZIC) $$leap -d $@-t.dir - $(PACKRATDATA) && \
@@ -967,6 +996,10 @@
rm public.dir/main.zi
cd public.dir && $(MAKE) PACKRATDATA=backzone main.zi
public.dir/zic -d public.dir/zoneinfo main.zi
+ rm public.dir/main.zi
+ cd public.dir && \
+ $(MAKE) PACKRATDATA=backzone PACKRATLIST=zone.tab main.zi
+ public.dir/zic -d public.dir/zoneinfo main.zi
:
rm -fr public.dir
touch $@
@@ -1027,9 +1060,9 @@
ALL_ASC = $(TRADITIONAL_ASC) $(REARGUARD_ASC) \
tzdb-$(VERSION).tar.lz.asc
-tarballs rearguard_tarballs traditional_tarballs \
+tarballs rearguard_tarballs tailored_tarballs traditional_tarballs \
signatures rearguard_signatures traditional_signatures: \
- version set-timestamps.out rearguard.zi
+ version set-timestamps.out rearguard.zi vanguard.zi
VERSION=`cat version` && \
$(MAKE) AWK='$(AWK)' VERSION="$$VERSION" $@_version
@@ -1042,6 +1075,8 @@
tzdata$(VERSION)-rearguard.tar.gz
traditional_tarballs_version: \
tzcode$(VERSION).tar.gz tzdata$(VERSION).tar.gz
+tailored_tarballs_version: \
+ tzdata$(VERSION)-tailored.tar.gz
signatures_version: $(ALL_ASC)
rearguard_signatures_version: $(REARGUARD_ASC)
traditional_signatures_version: $(TRADITIONAL_ASC)
@@ -1055,32 +1090,74 @@
tzdata$(VERSION).tar.gz: set-timestamps.out
LC_ALL=C && export LC_ALL && \
- tar $(TARFLAGS) -cf - $(COMMON) $(DATA) $(MISC) | \
+ tar $(TARFLAGS) -cf - $(TZDATA_DIST) | \
gzip $(GZIPFLAGS) >$@.out
mv $@.out $@
+# Create empty files with a reproducible timestamp.
+CREATE_EMPTY = TZ=UTC0 touch -mt 202010122253.00
+
+# The obsolescent *rearguard* targets and related macros are present
+# for backwards compatibility with tz releases 2018e through 2022a.
+# They should go away eventually. To build rearguard tarballs you
+# can instead use 'make DATAFORM=rearguard tailored_tarballs'.
tzdata$(VERSION)-rearguard.tar.gz: rearguard.zi set-timestamps.out
- rm -fr tzdata$(VERSION)-rearguard.dir
- mkdir tzdata$(VERSION)-rearguard.dir
- ln $(COMMON) $(DATA) $(MISC) tzdata$(VERSION)-rearguard.dir
- cd tzdata$(VERSION)-rearguard.dir && \
- rm -f $(TDATA) $(PACKRATDATA) version
+ rm -fr $@.dir
+ mkdir $@.dir
+ ln $(TZDATA_DIST) $@.dir
+ cd $@.dir && rm -f $(TDATA) $(PACKRATDATA) version
for f in $(TDATA) $(PACKRATDATA); do \
- rearf=tzdata$(VERSION)-rearguard.dir/$$f; \
+ rearf=$@.dir/$$f; \
$(AWK) -v DATAFORM=rearguard -f ziguard.awk $$f >$$rearf && \
$(SET_TIMESTAMP_DEP) $$rearf ziguard.awk $$f || exit; \
done
- sed '1s/$$/-rearguard/' \
- <version >tzdata$(VERSION)-rearguard.dir/version
+ sed '1s/$$/-rearguard/' <version >$@.dir/version
+ : The dummy pacificnew pacifies TZUpdater 2.3.1 and earlier.
+ $(CREATE_EMPTY) $@.dir/pacificnew
+ touch -cmr version $@.dir/version
+ LC_ALL=C && export LC_ALL && \
+ (cd $@.dir && \
+ tar $(TARFLAGS) -cf - \
+ $(TZDATA_DIST) pacificnew | \
+ gzip $(GZIPFLAGS)) >$@.out
+ mv $@.out $@
+
+# Create a tailored tarball suitable for TZUpdater and compatible tools.
+# For example, 'make DATAFORM=vanguard tailored_tarballs' makes a tarball
+# useful for testing whether TZUpdater supports vanguard form.
+# The generated tarball is not byte-for-byte equivalent to a hand-tailored
+# traditional tarball, as data entries are put into 'etcetera' even if they
+# came from some other source file. However, the effect should be the same
+# for ordinary use, which reads all the source files.
+tzdata$(VERSION)-tailored.tar.gz: set-timestamps.out
+ rm -fr $@.dir
+ mkdir $@.dir
: The dummy pacificnew pacifies TZUpdater 2.3.1 and earlier.
- TZ=UTC0 touch -mt 202010122253.00 \
- tzdata$(VERSION)-rearguard.dir/pacificnew
- touch -cmr version tzdata$(VERSION)-rearguard.dir/version
+ cd $@.dir && \
+ $(CREATE_EMPTY) $(PRIMARY_YDATA) $(NDATA) backward \
+ `test $(DATAFORM) = vanguard || echo pacificnew`
+ (grep '^#' tzdata.zi && echo && cat $(DATAFORM).zi) \
+ >$@.dir/etcetera
+ touch -cmr tzdata.zi $@.dir/etcetera
+ sed -n \
+ -e '/^# *version *\(.*\)/h' \
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