Provided by: libsdl3-doc_3.2.8+ds-1_all 

NAME
SDL_GetJoystickSerial - Get the serial number of an opened joystick, if available.
HEADER FILE
Defined in SDL3/SDL_joystick.h
SYNOPSIS
#include "SDL3/SDL.h" const char * SDL_GetJoystickSerial(SDL_Joystick *joystick);
DESCRIPTION
Returns the serial number of the joystick, or NULL if it is not available.
FUNCTION PARAMETERS
joystick the SDL_Joystick obtained from SDL_OpenJoystick ().
RETURN VALUE
Returns the serial number of the selected joystick, or NULL if unavailable.
AVAILABILITY
This function is available since SDL 3.2.0. Simple Directmedia Layer SDL 3.2.8 SDL_GetJoystickSerial(3)