Test to get Joystick Ioctl

joystic_ioctl_test.c

#include <stdio.h>
#include <linux/joystick.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <linux/input.h>

#define KEY_MAX_LARGE 0x2FF
#define KEY_MAX_SMALL 0x1FF

#define JSIOCSBTNMAP_LARGE _IOW('j', 0x33, __u16[KEY_MAX_LARGE - BTN_MISC + 1])
// #define JSIOCSBTNMAP_SMALL _IOW('j', 0x33, __u16[KEY_MAX_SMALL - BTN_MISC + 1])
#define JSIOCGBTNMAP_LARGE _IOR('j', 0x34, __u16[KEY_MAX_LARGE - BTN_MISC + 1])
// #define JSIOCGBTNMAP_SMALL _IOR('j', 0x34, __u16[KEY_MAX_SMALL - BTN_MISC + 1])

int main() {
    // Printing the values of various joystick ioctls in hexadecimal
    // printf("JSIOCGVERSION: 0x%x\n", JSIOCGVERSION);
    printf("const JSIOCGAXES = 0x%x;\n", JSIOCGAXES);
    printf("const JSIOCGBUTTONS = 0x%x;\n", JSIOCGBUTTONS);
    printf("const JSIOCGNAME256 = 0x%x;\n", JSIOCGNAME(256));  // Typically, this macro needs a buffer size.
    printf("const JSIOCSCORR = 0x%x;\n", JSIOCSCORR);
    printf("const JSIOCGCORR = 0x%x;\n", JSIOCGCORR);
    printf("const JSIOCSAXMAP = 0x%x;\n", JSIOCSAXMAP);
    printf("const JSIOCGAXMAP = 0x%x;\n", JSIOCGAXMAP);
    printf("const JSIOCSBTNMAP = 0x%x;\n", JSIOCSBTNMAP);
    printf("const JSIOCGBTNMAP_LARGE = 0x%x;\n", JSIOCGBTNMAP_LARGE);


    printf("const ABS_MAX = %d;\n", ABS_MAX);
    printf("const BTNMAP_SIZE = %d;\n", 0x2FF - BTN_MISC + 1);
    // BTN_MISC
    printf("const BTN_MISC = %d;\n", BTN_MISC);

    int fd = open("/dev/input/js0", O_RDONLY);

    int version = 0x000800;
    ioctl(fd, JSIOCGVERSION, &version);

    // printf("Joystick driver version: %d\n", version);
    printf("Driver version is %d.%d.%d.\n",
		version >> 16, (version >> 8) & 0xff, version & 0xff);

 printf("Size of int: %zu bytes\n", sizeof(int));
    printf("Size of unsigned char: %zu bytes\n", sizeof(unsigned char));
    return 0;
}