[oracle@server1 scripts]$ ./test_db.ksh -d abc 11 dev
-d is Default option
ORACLE_SID=abc
ORACLE_VERSION=11
ENV_TYPE=dev

[oracle@server1 scripts]$ ./test_db.ksh -d abc 11 dev -b 8192 -c AL32UTF8
arguments allowed: 3

[oracle@server1 scripts]$ ./test_db.ksh -b 4096
-b is for Non-default Block Size
BLOCK_SIZE=4096

[oracle@server1 scripts]$ ./test_db.ksh -c AL32UTF8
-c is for non-default character set
CHARACTER_SET=AL32UTF8

#!/bin/ksh

bflg=0
cflg=0
dflg=0
while getopts "b(blk):c(char):d(default):h(help)" opt
do      case $opt in
        (b)     bflg=1;;

        (c)     cflg=1;;

        (d)     dflg=1;;

        (h)     echo "Sample Script"
                exit 0;;

        (?)     echo "Not valid option"
                exit 1;;
        esac
done
shift $((OPTIND - 1))

# Verify that at least one option was given and that two operands are present...
if [ $((bflg + cflg + dflg)) -eq 0 ]
then
        echo "Atleast One option required"
        exit 3
fi

# Perform the requested actions...


if [ $bflg -eq 1 ]
then
        if [ $# -ne 1 ]
        then
                echo "arguments allowed: 1"
                exit 2
        else
                BLK_SIZE=$1
                echo "-b is for Non-default Block Size"
                echo "BLOCK_SIZE=$BLK_SIZE"
        fi
fi

if [ $cflg -eq 1 ]
then
        if [ $# -ne 1 ]
        then
                echo "arguments allowed: 1"
                exit 2
        else

                CHAR_SET=$1
                echo "-c is for non-default character set"
                echo "CHARACTER_SET=$CHAR_SET"
        fi
fi

if [ $dflg -eq 1 ]
then
        if [ $# -ne 3 ]
        then
                echo "arguments allowed: 3"
                exit 2
        else
                ORACLE_SID=$1
                ORACLE_VER=$2
                ENV_TYPE=$3
                echo "-d is Default option"
                echo "ORACLE_SID=$ORACLE_SID"
                echo "ORACLE_VERSION=$ORACLE_VER"
                echo "ENV_TYPE=$ENV_TYPE"
        fi
fi