Minutes Since Midnight 2000

From: Post, Ethan <Ethan.Post_at_ps.net>
Date: Fri, 17 Jan 2003 10:15:33 -0800
Message-ID: <F001.005333B9.20030117101533@fatcity.com>

I have a very clunky way of calculating the # of minutes in shell since 2000. This allows me to write the value to a variable and then do the math later in a script to figure out how long a job ran, an alert has been trigger etc...For those of you working in shell you know date math is not so easy (without GNU date). This is the simplest method I have found, I would just like the function below to look a bit cleaner.

function Minutes {

   # Funky function I use to calculate the number of minutes since 2000

   MIN_YEAR=$( date +"%Y" )
   MIN_YEAR=$( expr ${MIN_YEAR} - 2000 )
   MIN_YEAR=$( expr ${MIN_YEAR} \* 525600 )
   MIN_DAYS=$( date +"%j" )
   MIN_DAYS=$( expr "${MIN_DAYS}" - 1 )
   MIN_DAYS=$( expr "${MIN_DAYS}" \* 1440 )
   MIN_HOURS=$( date +"%H" )
   MIN_HOURS=$( expr "${MIN_HOURS}" \* 60 )
   MIN_MINS=$( date +"%M" )
   MIN_TOTAL=$(( ${MIN_YEAR} + ${MIN_DAYS} + ${MIN_HOURS} + ${MIN_MINS} ))

   print ${MIN_TOTAL}
}

I am sure there is a more elegant way of doing this, anyone care to share thier ideas/improvments/solutions?

Thanks,
Ethan

Perl is not an option Jared ;)
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Author: Post, Ethan
  INET: Ethan.Post_at_ps.net

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