man SDL_JoystickOpened (3): Determine if a joystick has been opened

SDL_JoystickOpened(3) Determine if a joystick has been opened

SYNOPSIS

#include "SDL.h"

int SDL_JoystickOpened(int index);

Determines whether a joystick has already been opened within the application. index refers to the N'th joystick on the system.

Returns 1 if the joystick has been opened, or 0 if it has not.