Bug#333927: marked as done (libc6: Timezone calculation for files in /usr/share/zoneinfo/Etc are inversed!)
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and subject line Bug#333927: libc6: Timezone calculation for files in /usr/share/zoneinfo/Etc are inversed!
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From: Gleydson Mazioli da Silva <gleydson@debian.org>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: libc6: Timezone calculation for files in /usr/share/zoneinfo/Etc are
inversed!
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Date: Fri, 14 Oct 2005 11:38:09 -0300
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Package: libc6
Version: 2.3.2.ds1-22
Severity: critical
Justification: breaks unrelated software
The date show by "date" command (or zdump) for localtime configured
for files in /usr/share/zoneinfo/Etc are inversed (GMT-Number act as
GMT+Number, and GMT+Number work like GMT-Number) this cause bad
date to be written to log files and causes the system to run maintanance
tasks out of sync with other systems (database shutdown, by instance),
causing availability problems for systems running in production environment,
backup problems, etc.
how to reproduce this bug:
(GMT Time is now 14:27)
zdump /usr/share/zoneinfo/Etc/GMT-3
/usr/share/zoneinfo/Etc/GMT-3 Fri Oct 14 17:27:22 2005 GMT-3
This bug was reproduced on every system that has Sarge installed.
-- System Information:
Debian Release: 3.1
Architecture: i386 (i586)
Kernel: Linux 2.4.31-ow1
Locale: LANG=pt_BR, LC_CTYPE=ISO-8859-1 (charmap=ISO-8859-1) (ignored: LC_ALL set to pt_BR)
Versions of packages libc6 depends on:
ii libdb1-compat 2.1.3-7 The Berkeley database routines [gl
-- no debconf information
---------------------------------------
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>From drow@nevyn.them.org Fri Oct 14 11:24:07 2005
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Date: Fri, 14 Oct 2005 14:24:05 -0400
From: Daniel Jacobowitz <drow@false.org>
To: Gleydson Mazioli da Silva <gleydson@debian.org>,
333927-close@bugs.debian.org
Subject: Re: Bug#333927: libc6: Timezone calculation for files in /usr/share/zoneinfo/Etc are inversed!
Message-ID: <20051014182405.GA30567@nevyn.them.org>
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On Fri, Oct 14, 2005 at 11:38:09AM -0300, Gleydson Mazioli da Silva wrote:
> Package: libc6
> Version: 2.3.2.ds1-22
> Severity: critical
> Justification: breaks unrelated software
>
>
> The date show by "date" command (or zdump) for localtime configured
> for files in /usr/share/zoneinfo/Etc are inversed (GMT-Number act as
> GMT+Number, and GMT+Number work like GMT-Number) this cause bad
> date to be written to log files and causes the system to run maintanance
> tasks out of sync with other systems (database shutdown, by instance),
> causing availability problems for systems running in production environment,
> backup problems, etc.
> how to reproduce this bug:
>
> (GMT Time is now 14:27)
> zdump /usr/share/zoneinfo/Etc/GMT-3
> /usr/share/zoneinfo/Etc/GMT-3 Fri Oct 14 17:27:22 2005 GMT-3
>
> This bug was reproduced on every system that has Sarge installed.
First of all, this is not a critical bug; it does not cause serious
data loss, it does not introduce a security hole, and it affects only
"related" software.
Secondly, it's not a bug at all. From the timezone data:
# We use POSIX-style signs in the Zone names and the output abbreviations,
# even though this is the opposite of what many people expect.
# POSIX has positive signs west of Greenwich, but many people expect
# positive signs east of Greenwich. For example, TZ='Etc/GMT+4' uses
# the abbreviation "GMT+4" and corresponds to 4 hours behind UTC
# (i.e. west of Greenwich) even though many people would expect it to
# mean 4 hours ahead of UTC (i.e. east of Greenwich).
--
Daniel Jacobowitz
CodeSourcery, LLC
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