Hello,
I think there's a small regression in coreutils 8.25 date command with
regards to timezone printing on a machine without native 'timezone_t'.
Example:
$ uname -a
SunOS unstable10x 5.10 Generic_147441-19 i86pc i386 i86pc
$ export TZ=Asia/Tokyo
$ ./coreutils-8.24/src/date +%Z
JST
$ ./coreutils-8.25/src/date +%Z
[[[empty line]]]
I suspect it has something to do with this commit:
commit 037e3b9847feb46cf6b58d99ce960d3987faaf52
date: 2015-07-24 01:49:31 (GMT)
subject: build: fprintftime/nstrftime API changes
configuration values on this machine:
$ ggrep -E 'TZ|ZONE' lib/config.h
#define GETTIMEOFDAY_TIMEZONE void
#define HAVE_DECL_TZNAME 1
#define HAVE_RUN_TZSET_TEST 1
/* #undef HAVE_STRUCT_TM_TM_ZONE */
/* #undef HAVE_TIMEZONE_T */
`HAVE_STRUCT_TM_TM_ZONE' instead. */
/* #undef HAVE_TM_ZONE */
#define HAVE_TZNAME 1
#define HAVE_TZSET 1
/* #undef TZSET_CLOBBERS_LOCALTIME */
Trying to debug, I see the following:
1. in 'date.c', show_date() calls fprintftime (in ./lib/strftime.c).
The values upon entry are:
fprintftime (s=0x8079c10 <_iob+16>, format=0x8047ccd "%Z",
tp=0xfef30200, tz=0x807b028,
ns=446195784) at lib/strftime.c:1465
(gdb) p *tz
$6 = {next = 0x0, tzname_copy = {0x0, 0x0}, tz_is_set = 1 '\001',
abbrs = 0x807b035 "Asia/Tokyo"}
2. stepping through ./lib/strftime.c:445 has this:
445 char **tzname_vec = tzname;
(gdb) p tzname
$10 = {0xfef302c4 "JST", 0xfef30304 "JDT"}
3. ./lib/strftime.c:484 has this, which sets tzname_vec to nulls (from 'tz',
originating from 'tzalloc'):
(gdb) n
484 tzname_vec = tz->tzname_copy;
(gdb) n
493 if (!(zone && *zone) && tp->tm_isdst >= 0) {
(gdb) p tzname_vec
$3 = (char **) 0x807b02c
(gdb) p *tzname_vec
$4 = 0x0
(gdb) p zone
$5 = 0x0
(gdb) n
494 zone = tzname_vec[tp->tm_isdst != 0];
(gdb) n
496 if (! zone)
(gdb) p zone
$6 = 0x0
(gdb) n
497 zone = "";
>From this point on, 'zone' is an empty string, and that's what is printed
by 'date'.
Not sure where to start at fixing it, but I hope the attached patch can be
used to test it.
Happy to test things further if needed.
regards,
- assaf
From e87ceb59821cd0daaa951e0ed9715885bdd99088 Mon Sep 17 00:00:00 2001
From: Assaf Gordon <assafgor...@gmail.com>
Date: Wed, 16 Mar 2016 23:23:19 -0400
Subject: [PATCH] tests: test date %Z behaviour
* tests/misc/date.pl: ensure %Z format prints correct values.
---
tests/misc/date.pl | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/tests/misc/date.pl b/tests/misc/date.pl
index 2d19254..f6e0e28 100755
--- a/tests/misc/date.pl
+++ b/tests/misc/date.pl
@@ -218,6 +218,10 @@ my @Tests =
# Don't recognize %:z with a field width between the ':' and the 'z'.
['tz-5wf', '+%:8z', {OUT=>"%:8z"}, {ENV=>'TZ=XXX0:01'}],
+ # Test alphabetic timezone abbrv
+ ['tz-6', '+%Z', {OUT=>"UTC"}],
+ ['tz-7', '+%Z', {OUT=>"JST"}, {ENV=>'TZ=Asia/Tokyo'}],
+
['ns-relative',
'--iso=ns',
"-d'1970-01-01 00:00:00.1234567 UTC +961062237.987654321 sec'",
--
2.0.4
