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Full Discussion: Time Calculations
Top Forums UNIX for Dummies Questions & Answers Time Calculations Post 302135921 by jim mcnamara on Thursday 13th of September 2007 02:08:48 PM
Old 09-13-2007
In general, when working with time like this, you convert current time(s) to the epoch time in seconds - ie. number of seconds since Jan 1 1970.
On linux (or if you have gnu date)
Code:
epoch_seconds=$(date +%s)

otherwise try perl
Code:
epoch_seconds=$(perl -e 'print time;')

epoch_seconds is now a number like 1189706758 that you can add seconds to.
 

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Time::Duration::Parse(3pm)				User Contributed Perl Documentation				Time::Duration::Parse(3pm)

NAME
Time::Duration::Parse - Parse string that represents time duration SYNOPSIS
use Time::Duration::Parse; my $seconds = parse_duration("2 minutes and 3 seconds"); # 123 DESCRIPTION
Time::Duration::Parse is a module to parse human readable duration strings like 2 minutes and 3 seconds to seconds. It does the opposite of duration_exact function in Time::Duration and is roundtrip safe. So, the following is always true. use Time::Duration::Parse; use Time::Duration; my $seconds = int rand 100000; is( parse_duration(duration_exact($seconds)), $seconds ); FUNCTIONS
parse_duration $seconds = parse_duration($string); Parses duration string and returns seconds. When it encounters an error in a given string, it dies an exception saying "Unknown timespec: blah blah blah". This function is exported by default. AUTHOR
Tatsuhiko Miyagawa <miyagawa@bulknews.net> COPYRIGHT
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. Some internal code is taken from Cache and Cache::Cache modules on CPAN. SEE ALSO
Date::Manip, DateTime::Format::Duration, <http://use.perl.org/~miyagawa/journal/30310> perl v5.10.0 2008-06-02 Time::Duration::Parse(3pm)
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