#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>

struct js_event {
    __uint32_t time;     /* event timestamp in milliseconds */
    __uint16_t value;    /* value */
    __uint8_t type;      /* event type */
    __uint8_t number;    /* axis/button number */
};

int main() {
    int fd = open("/dev/input/js0", O_RDONLY);
    if (fd == -1) {
        perror("Open Joystick");
        exit(1);
    }

    struct js_event e;
    while (1) {
        int n_read = read(fd, &e, sizeof(e));

        if (n_read == 0) {
            exit(0);
        } else if (n_read == -1) {
            perror("Read");
            exit(1);
        }

        printf("Axis %d: %d\n", e.number, e.value);

    }
}