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Top Forums UNIX for Dummies Questions & Answers Need to get 4 Hrs back time and compare with successive time Post 302214962 by Perderabo on Tuesday 15th of July 2008 08:39:55 AM
Old 07-15-2008
You have this: 'print localtime(time() - 14400+$i) . "\n"' which is a single-quoted string. It is stopping the shell from replacing $i with the value. You must move $i outside of the single quotes. So turn your single-quoted string into one single-quoted string, then $i, then another single-quoted string.



`perl -e 'print localtime(time() - 14400+'$i') . "\n"'`
 

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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 v5.16.2 2003-05-21 Epoch(3)
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