DateTime::TimeZone::Local::Unix(3)
NAME
DateTime::TimeZone::Local::Unix - Determine the local system's time
zone on Unix
VERSION
version 1.86
SYNOPSIS
my $tz = DateTime::TimeZone->new( name => 'local' );
my $tz = DateTime::TimeZone::Local->TimeZone();
DESCRIPTION
This module provides methods for determining the local time zone on a
Unix platform.
HOW THE TIME ZONE IS DETERMINED
This class tries the following methods of determining the local time
zone:
o $ENV{TZ}
It checks $ENV{TZ} for a valid time zone name.
o /etc/localtime
If this file is a symlink to an Olson database time zone file
(usually in /usr/share/zoneinfo) then it uses the target file's
path name to determine the time zone name. For example, if the path
is /usr/share/zoneinfo/America/Chicago, the time zone is
"America/Chicago".
Some systems just copy the relevant file to /etc/localtime instead
of making a symlink. In this case, we look in /usr/share/zoneinfo
for a file that has the same size and content as /etc/localtime to
determine the local time zone.
o /etc/timezone
If this file exists, it is read and its contents are used as a time
zone name.
o /etc/TIMEZONE
If this file exists, it is opened and we look for a line starting
like "TZ = ...". If this is found, it should indicate a time zone
name.
o /etc/sysconfig/clock
If this file exists, it is opened and we look for a line starting
like "TIMEZONE = ..." or "ZONE = ...". If this is found, it should
indicate a time zone name.
o /etc/default/init
If this file exists, it is opened and we look for a line starting
like "TZ=...". If this is found, it should indicate a time zone
name.
AUTHOR
Dave Rolsky <autarch@urth.org>
COPYRIGHT AND LICENSE
This software is copyright (c) 2015 by Dave Rolsky.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
perl v5.16.3 2015-03-20DateTime::TimeZone::Local::Unix(3)
datetime-timezone 1.860 - Generated Tue Mar 24 05:09:32 CDT 2015