usings options in a bash script for BoD and EoD processes

gistfile1.txt

#!/bin/bash
usage() { echo "$0 usage:" && grep " .)\ #" $0; exit 0; }
[ $# -eq 0 ] && usage
while getopts ":hs:b:e:" arg; do
  case $arg in
    b) # Specify b value.
      echo "runningBoD is ${OPTARG}"
        ./BoD.sh 
      ;;
    e) # Specify e value.
      echo "runningEoD is ${OPTARG}"
        ./EoD.sh
      ;;
    s) # Specify strength, either 45 or 90.
      strength=${OPTARG}
      [ $strength -eq 45 -o $strength -eq 90 ] \
        && echo "Strength is $strength." \
        || echo "Strength needs to be either 45 or 90, $strength found instead."
      ;;
    h | *) # Display help.
      usage
      exit 0
      ;;
  esac
done

remember line 4 is different for hs and for b, e