HOMEDIR=$HOME/scripts
REPLACE=$HOMEDIR/cronjob.crj
RESTORE=$HOMEDIR/cronjob.crj.bkp

usage () {

  echo " "
  echo " Script Usage "
  echo "    sh disen_cronjobs.sh (disable|enable) "
  echo " "
  exit 1

}

disablejobs () {
#Backup existing crontab entry and disable all cronjobs
echo "Making current cronjob backup and disabling all entries"
crontab -l |tee $REPLACE $RESTORE
sed -i 's/^/#/g' $REPLACE
crontab $REPLACE
echo ""
echo "New CRON Entry"
echo "=============="
crontab -l
}

enablejobs () {
#Check original cron backup file exist

  if [ -f $RESTORE ]; then
      #Restore Cronjob from backup file
      crontab $RESTORE
      crontab -l
  else
      echo "No $RESTORE File Exist"
      echo "Run script with disable option first"
  fi
}

if [ $# -ne 1 ]; then
    usage
    exit 1;
else
    case $1 in
        [Dd][Ii][Ss][Aa][Bb][Ll][Ee])
            echo -e "Disabling Cronjobs @`tput rev``date +"%d/%b/%Y %H:%M:%S %Z"``tput rmso`"
            disablejobs
            ;;
        [Ee][Nn][Aa][Bb][Ll][Ee])
            echo -e "Enabling Cronjobs from backup @`tput rev``date +"%d/%b/%Y %H:%M:%S %Z"``tput rmso`"
            enablejobs
            ;;
        *) echo "******************************************************************"
           echo "${0}: Invalid option found on command line: ${OPTARG}"
           echo "******************************************************************"
           usage
           break
           ;;
    esac
fi