{
{    The purpose of this procedure is to notify an operator of a condition
{  requiring action, present a menu of possible actions, and obtain an
{  operator choice from the menu.
{
{       OFP$PROCESS_OPERATOR_MENU (MENU_SELECTIONS, NUMBER_OF_CHOICES,
{             OPERATOR_CLASS, CHOICE, RESPONSE_STRING, STATUS)
{
{ MENU SELECTIONS: (input) This parameter specifies the text lines comprising
{       the menu to be displayed to an operator. The menu should describe the
{       condition requiring action and the possible actions the operator may
{       choose.
{
{ NUMBER_OF_DISPLAYABLE_LINES: (input) This parameter specifies the number of
{       text lines comprising the menu to be displayed to an operator.
{
{ NUMBER_OF_CHOICES: (input) This parameter specifies the number of choices
{       available on the menu. An operator must respond to the menu with a
{       choice in the range 1 .. number_of_choices.
{
{ OPERATOR_CLASS: (input) This parameter specifies the class of operator
{       allowed to display and respond to the menu. Currently this value
{       must be either ofc$removable_media_operator or ofc$system_operator.
{
{ CHOICE: (output) This parameter specifies the choice selected by the
{       operator.
{
{ RESPONSE_STRING: (output) This parameter specifies the response string,
{       if any, entered by the operator.
{
{ STATUS: (output) This parameter specifies the status of the request.
{
{       CONDITION: ofe$invalid_operator_class
{
