https://invisible-island.net/ncurses/man/

key_defined 3x 2024-06-08 ncurses 6.5 Library calls

key_defined(3x)                  Library calls                 key_defined(3x)

NAME

       key_defined - test whether a curses function key code is defined

SYNOPSIS

       #include <curses.h>

       int key_defined(const char * definition);

DESCRIPTION

       The  key_defined  ncurses  extension  permits  a  curses application to
       determine the function key code, if any, to which the string definition
       is bound.

RETURN VALUE

       key_defined  returns the first key code to which definition is bound if
       any exists.  If none does, it returns 0.  If definition is a prefix  of
       another binding, key_defined returns -1.

EXTENSIONS

       define_key is an ncurses extension.

PORTABILITY

       Applications employing ncurses extensions should condition their use on
       the visibility of the NCURSES_VERSION preprocessor macro.

AUTHORS

       Thomas Dickey