Shell Programming and Scripting

script.sh -a  -f  <value1> -d <value2> -h <value3>
script.sh -b  -i <value4>

while getopts :abf:d:h:i: mode
do
        case $mode in
        a)adhoc=1;;
        b)batch=1;;
        f)fn=$OPTARG;;
        d)del=$OPTARG;;
        h)hd=$OPTARG;;
        i)id=$OPTARG;;
        *)echo "Invalid arg";;
esac done

if [[ ! -z $adhoc ]]
then
    echo "Adhoc processing"
    echo "fn: " $fn
    echo "del: " $del
    echo "hd: " $hd
fi

if [[ ! -z $batch ]]
then
    echo "Batch processing"
    echo "id: " $id
fi

if [[ $adhoc -eq 1 && $batch -eq 1 ]]
then
  echo "Cannot specify both adhoc and batch."
  exit 1
fi

adhoc=0
batch=0

if [ $((adhoc + batch)) -ne 1 ]
then    echo "Exactly one of -a and -b must be specified." >&2
        exit 1
fi