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Top Forums Shell Programming and Scripting GMT to MST timestamp conversion Post 302928911 by derekludwig on Tuesday 16th of December 2014 06:23:25 AM
Old 12-16-2014
Kmanivan,

The call to timelocal should be to timegmt as the argument is in GMT. You then can eliminate adjusting the value of seconds by 25200 when you call localtime.

For example:
Code:
#!/usr/bin/perl
use strict;
use warnings;
use Time::Local;
use POSIX qw{ strftime }

my @T = $ARGV[0] =~ m/^(\d{4})-(\d{1,2})-(\d{1,2})T(\d{1,2}):(\d{1,2}):(\d{1,2})(?:\.\d+)$/;
print strftime("%Y-%m-%d %H:%M:%S %Z%n", localtime timegmt reverse @T);

 

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Epoch(3)						User Contributed Perl Documentation						  Epoch(3)

NAME
Time::Epoch - Convert between Perl epoch and other epochs SYNOPSIS
#!/usr/bin/perl -wl use Time::Epoch; my $perlsec = 966770660; # Sun Aug 20 07:24:21 2000 -0400 on Mac OS my $epochsec = perl2epoch($perlsec, 'macos', '-0400'); my $perlsec2 = epoch2perl($epochsec, 'macos', '-0400'); print $perlsec; print $perlsec2; print $epochsec; # correct time on Unix: print scalar localtime $perlsec; # correct time on Mac OS (-0400): print scalar localtime $epochsec; DESCRIPTION
Exports two functions, "perl2epoch" and "epoch2perl". Currently only goes between Perl (Unix) epoch and Mac OS epoch. This is in preparation for an eventual move of Perl to its own universal epoch, so we can get the system epoch of any platform that differs from Perl's. Epochs o macos Takes additional optional parameter of time zone differential. If time zone differential not supplied, we guess by getting the different between "localtime" and "gmtime" with <Time::Local::timelocal>. BUGS
o Hm. With the above test, "scalar localtime $perlsec" under my Linux box and "scalar localtime $epochsec" under my Mac OS box are off by one second from each other. Maybe a leap second thing? Odd. AUTHOR
Chris Nandor <pudge@pobox.com>, http://pudge.net/ Copyright (c) 2000-2003 Chris Nandor. All rights reserved. This program is free software; you can redistribute it and/or modify it under the terms of the Artistic License, distributed with Perl. SEE ALSO
perl(1), perlport(1), Time::Local. perl v5.18.2 2003-05-21 Epoch(3)
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