Difference in date time

Question

I have 2 variables.

GMDCOMTM which stores the date time Tue Oct  1 13:32:40 2013
GMDRRSTM which stores the date time Tue Oct  2 23:35:33 2013

H

Answer 1

I'm normal using a custom made function to do the calculations. It may be long way but it will definitely work on all UNIX and Linux based systems. Following the code block.

time_diff(){
    foodate1=$1
    foodate2=$2
    foosecvall=`echo $foodate1 | awk -F: '{ print ($1 * 3600) + ($2 * 60) + $3 }'`
    foosecval2=`echo $foodate2 | awk -F: '{ print ($1 * 3600) + ($2 * 60) + $3 }'`
    foodiffsec=$((foosecvall-foosecval2));

    s=$foodiffsec
    h=$((s/3600));
    s=$((s-$((h*3600))));
    m=$((s/60));
    s=$((s-$((m*60))));
    footmstm=$h":"$m":"$s
}

Place the above code in your script and then call the function like follows.

TIME1="10:12:14"
TIME2="12:15:14"

time_diff $TIME2 $TIME1

echo $footmstm