Shell Programming and Scripting

BackupLocation="$OPTARG"
                if [[ $LFlag -eq 1 ]]; then
                        echo "Either option l or L should be given to $Programname"
                        echo "$Usage"
                        echo "$Programname is terminated"
                        return $ERR;
                fi
                if [[ $isBackUp -eq 1 ]];
                then
                        if [[ ! -d $BackupLocation ]];
                           then
                                echo "Non-existant directory specified"
                        fi
                               #givenPath="$BackupLocation"
                                BackupLocation=$BackupLocation/backup
                                mkdir -p $BackupLocation >/dev/null 2>&1
                                if [[ $? = 0 ]];
                                then
                                        echo "$Programname creates the dirctory $BackupLocation"
                                else
                                        echo "$Programname could not able to create the directory $BackupLocation"
                                        return $ERR
                                fi


                        lFlag=1
                        Llcron=l
                else
                        echo "$Programname is executed with -l option without action mtBackup"
                        echo "$Usage"
                        echo "$Programname is terminated"
                        return $ERR
                fi
                ;;