DateTime::TimeZone::Local::Unix (3)

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NAME

DateTime::TimeZone::Local::Unix - Determine the local system's time zone on Unix

VERSION

version 1.95

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:

*

$ENV{

TZ

}

It checks $ENV{TZ} for a valid time zone name.

*

/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.

*

/etc/timezone

If this file exists, it is read and its contents are used as a time zone name.

*

/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.

*

/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.

*

/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) 2016 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.