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Date: Thu, 31 Mar 2016 18:50:14 +0300
From: Hannu Nyman <hannu.nyman@....fi>
To: musl@...ts.openwall.com
Subject: Bug in timezone handling (new zonename format like '<+04>-4' )
The IANA timezone zoneinfo maintainers have decided to introduce new
timezones in a simplified format with 2016b zoneinfo.
No more invented name strings, but just the time offset inside <...>
This seems to break musl.
http://mm.icann.org/pipermail/tz-announce/2016-March/000036.html
New zones Europe/Astrakhan and Europe/Ulyanovsk ... Asia/Barnaul ...
As a trial of a new system that needs less information to be made up,
the new zones use numeric time zone abbreviations like "+04" instead of
invented abbreviations like "ASTT".
I have tested with Openwrt trunk using musl (with Linux kernel 4.1) and older
uClibc-based Openwrt CC15.05.1.
The uClibc-based system uses the new zones ok, but the musl-based build
behaves badly, as it defaults to GMT and shows the zonename as '+04>-4'.
(This is when full zoneinfo files are not installed and just the TZ variable
is used.)
Examples at https://github.com/openwrt/luci/issues/675
(note: Openwrt patches musl to store TZ in /etc/TZ instead of an env
variable, but that should have no impact in the displayed timezone.)
Example with musl:
old zone is ok:
Europe/Helsinki
root@...nWrt:~# cat /etc/TZ
EET-2EEST,M3.5.0/3,M10.5.0/4
root@...nWrt:~# uptime
11:00:52 up 18:17, load average: 0.43, 0.13, 0.11
root@...nWrt:~# date
Wed Mar 30 11:00:55 EEST 2016
"new zone" is handle wrongly:
Europe/Astrakhan
root@...nWrt:~# cat /etc/TZ
<+04>-4
root@...nWrt:~# uptime
08:02:52 up 18:19, load average: 0.17, 0.18, 0.13
root@...nWrt:~# date
Wed Mar 30 08:02:59 +04>-4 2016
(That should be Helsinki+1 (= +2 -DST) = 12:02:59)
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