Shell Programming and Scripting

Hi,

What i am looking for and i am new to this too, is a bash script that will add time in the format hh:mm:ss and produce the answer in minutes or seconds. It needs to be a loop since there are hundreds of times in my file. This is data is from a CDR that calculates duration of time used. THANKS in ADVANCE.

example of data

01:10:10
02:05:10

answer in seconds :

answer in minutes rounded up :

This awk statement takes time as stated and converts it to seconds.

Code:

# t.shl
echo "$1" | awk -F':'  '{ print $1*3600 + $2*60 + $3 }'

usage : ./t.shl 01:10:01

You get to do the addition and subtraction

And don't forget to allow for start time before midnight and end time after.
if start_time > end_time
elapsed_ time =(86400- start_seconds)+end_seconds