Shell Programming and Scripting

STARTTIME=whenever this script starts
./path/to/command.sh >>logfile.log
TOTALTIME=<time at this stage of the script after above command finished> - $STARTTIME
ECHO This command took $TOTALTIME to complete. >>logfile.log

echo "Seconds since start of script:  $SECONDS"
sleep 10
echo "Seconds since start of script:  $SECONDS"

printf "%02dH %02dM %02dS\n" $(( SECONDS/(60*60) )) $(( SECONDS/60 ))  $(( SECONDS%60 ))

#!/bin/bash

sleep 10

SCRIPTTIME= printf "%02dH %02dM %02dS\n" $(( SECONDS/(60*60) )) $(( SECONDS/60 ))  $(( SECONDS%60 ))

echo "This script took $SCRIPTTIME to run."

00H 00M 10S
This script took  to run.

printf "This script took %02dH %02dM %02dS to run\n" \
        $(( SECONDS/(60*60) )) $(( SECONDS/60 ))  $(( SECONDS%60 ))

STARTTIME=`date +"%s"`
./path/to/command.sh >>logfile.log
TOTALTIME=$(expr `date +"%s"`  - $STARTTIME)
ECHO This command took $TOTALTIME to complete. >>logfile.log