menu_pattern, set_menu_pattern
  —
get or set menu pattern
Curses Menu Library (libmenu, -lmenu)
#include <menu.h>
char *
  
  menu_pattern(MENU
    *menu);
The menu_pattern() function returns a pointer to the
  string that is currently in the menu pattern buffer. The menu pattern buffer
  can be set by calling set_menu_pattern() which will
  set the pattern buffer to the string passed and then attempt to match that
  string against the names of the items in the attached items.
The functions return one of the following error values:
  - E_OK
- The function was successful.
- E_SYSTEM_ERROR
- There was a system error during the call.
- E_BAD_ARGUMENT
- One or more of the arguments passed to the function was incorrect.
- E_NO_MATCH
- The character search failed to find a match.
The header <menu.h> automatically includes both
  <curses.h> and
  <eti.h>.