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Full Discussion: Setting a TZ variable in a script
Top Forums Shell Programming and Scripting Setting a TZ variable in a script Post 302569485 by maverick72 on Monday 31st of October 2011 12:41:42 PM
Old 10-31-2011
Setting a TZ variable in a script
Hello all,

I know this must be simple .... but i can't grasp what could be the issue.

I'm trying to setup the timezone variable (to the unix command date) according to what i find in a value that i got from parsing the config file.

The end result would be setting the log file with this new value.

RHEL 6

Those are not the REAL values of course. Its only for testing.

Code:
bash$ cat time_zone.tmp
NPK TZ=/usr/share/zoneinfo/Asia/Hong_Kong
ATHEX TZ=/usr/share/zoneinfo/Canada/Eastern
HSBC TZ=/usr/share/zoneinfo/Asia/Hong_Kong

Code:
#!/bin/sh

LIST="HSBC ATHEX NPK CLSA ETC"

for ITEM in ${LIST} ; do
        TZ=`grep ${ITEM} time_zone.tmp | cut -d " " -f2`
        if [ X"${TZ}" != X ] ; then
                DATE=`${TZ}; date`
        else
                DATE=`date`
        fi
        echo ${ITEM} ": " ${DATE}
done

 

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LEARN ABOUT MOJAVE

datetime::timezone::local::unix5.18

DateTime::TimeZone::Local::Unix(3)			User Contributed Perl Documentation			DateTime::TimeZone::Local::Unix(3)

NAME

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

VERSION

       version 1.63

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) 2013 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 v5.18.2							    2013-10-28					DateTime::TimeZone::Local::Unix(3)
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