Shell Programming and Scripting

example
./myscript -a apples,oranges,pears -t ham,pastrami,bologna

while getops atl OPTION
do
case $OPTION in
a) AVAR=ACTIVE ;;
t) TVAR=ACTIVE ;;
esac
done

if [ $AVAR ]
then
read in string "apples,oranges,pears"
etc...

if [$TVAR]
then
read in string "ham,pastrami,bologna"

while [ "$#" -gt 0 ]
do
        case "$1" in
        -a)   AVAR=ACTIVE
                ASTR=$2
                shift
                ;;
        -t) TVAR=ACTIVE
              TSTR=$2
              shift
        --)  shift ; break ;;
        -*)  echo "Unknown option" >&2
              exit 1
              ;;
        *) break ;;
        esac

        shift
done


echo "AVAR $AVAR ASTR $ASTR"
echo "TVAR $TVAR TSTR $TSTR"

$ ./script.sh -a abcd,efg,hij -t def,gh,jkl

# cat myscript 
#!/usr/bin/ksh

while getopts "a:t:" opt
do
   case "${opt}" in 
    a) AVAR=ACTIVE 
       string_avar="${OPTARG}" ;;
    t) TVAR=ACTIVE 
       string_tvar="${OPTARG}" ;;
   esac
done

if [ "${AVAR}." != "." ] 
then
   echo "string_avar: ${string_avar}"
fi

if [ "${TVAR}." != "." ] 
then
   echo "string_tvar: ${string_tvar}"
fi

# ./myscript -a apples,oranges,pears -t ham,pastrami,bologna
string_avar: apples,oranges,pears
string_tvar: ham,pastrami,bologna