menu_driver(3curses)                            menu_driver(3curses)


       NAME
             menu_driver - command processor for the menus subsystem

       SYNOPSIS
             cc [flag . . .] file -lmenu -lcurses [library . . .]
             #include <menu.h>
             int menu_driver(MENU *menu, int c);

       DESCRIPTION
             menu_driver is the workhorse of the menus subsystem.  It
             checks to determine whether the character c is a menu request
             or data.  If c is a request, the menu driver executes the
             request and reports the result.  If c is data (a printable
             ASCII character), it enters the data into the pattern buffer
             and tries to find a matching item.  If no match is found, the
             menu driver deletes the character from the pattern buffer and
             returns E_NO_MATCH.  If the character is not recognized, the
             menu driver assumes it is an application-defined command and
             returns E_UNKNOWN_COMMAND.

             Menu driver requests:
             REQ_LEFT_ITEM     Move left to an item.
             REQ_RIGHT_ITEM    Move right to an item.
             REQ_UP_ITEM       Move up to an item.
             REQ_DOWN_ITEM     Move down to an item.
             REQ_SCR_ULINE     Scroll up a line.
             REQ_SCR_DLINE     Scroll down a line.
             REQ_SCR_DPAGE     Scroll up a page.
             REQ_SCR_UPAGE     Scroll down a page.
             REQ_FIRST_ITEM    Move to the first item.
             REQ_LAST_ITEM     Move to the last item.
             REQ_NEXT_ITEM     Move to the next item.
             REQ_PREV_ITEM     Move to the previous item.
             REQ_TOGGLE_ITEM   Select/de-select an item.
             REQ_CLEAR_PATTERN Clear the menu pattern buffer.
             REQ_BACK_PATTERN  Delete the previous character from pattern buffer.
             REQ_NEXT_MATCH    Move the next matching item.
             REQ_PREV_MATCH    Move to the previous matching item.

       RETURN VALUE
             menu_driver returns one of the following:







                           Copyright 1994 Novell, Inc.               Page 1

      menu_driver(3curses)                            menu_driver(3curses)


            E_OK              - The routine returned successfully.
            E_SYSTEM_ERROR    - System error.
            E_BAD_ARGUMENT    - An incorrect argument was passed to the routine.
            E_BAD_STATE       - The routine was called from an initialization or
                                termination function.
            E_NOT_POSTED      - The menu has not been posted.
            E_UNKNOWN_COMMAND - An unknown request was passed to the menu
                                driver.
            E_NO_MATCH        - The character failed to match.
            E_NOT_SELECTABLE  - The item cannot be selected.
            E_REQUEST_DENIED  - The menu driver could not process the request.

      NOTICES
            Application defined commands should be defined relative to
            (greater than) MAX_COMMAND, the maximum value of a request
            listed above.

            The header file menu.h automatically includes the header files
            eti.h and curses.h.

      REFERENCES
            curses(3curses), menus(3curses)


























                          Copyright 1994 Novell, Inc.               Page 2