osx man page for key_defined

key_defined(3X) 														   key_defined(3X)

NAME
       key_defined - check if a keycode is defined

SYNOPSIS
       #include <curses.h>

       int key_defined(const char *definition);

DESCRIPTION
       This is an extension to the curses library.  It permits an application to determine if a string is currently bound to any keycode.

RETURN VALUE
       If  the	string is bound to a keycode, its value (greater than zero) is returned.  If no keycode is bound, zero is returned.  If the string
       conflicts with longer strings which are bound to keys, -1 is returned.

PORTABILITY
       These routines are specific to ncurses.	They were not supported on Version 7, BSD or System V implementations.	It is recommended that any
       code depending on them be conditioned using NCURSES_VERSION.

SEE ALSO
       define_key(3X).

AUTHOR
       Thomas Dickey.

																   key_defined(3X)