#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <sys/ioctl.h>

#include "linux/fb.h"

int main(int argc, char *argv[]) {

  int fd = open("/dev/fb0", O_RDWR);
  if (fd < 0) {
    perror("");
    exit(EXIT_FAILURE);
  }
  
  struct fb_fix_screeninfo sif;
  if (ioctl(fd, FBIOGET_VSCREENINFO, &sif) < 0) {
    perror("");
    exit(EXIT_FAILURE);
  }

  printf("id %s\n", sif.id);
  printf("type %d, aux %d\n", sif.type, sif.type_aux);
  printf("visual %d\n", sif.visual);
  printf("accel %d\n", sif.accel);
  printf("line length %d\n", sif.line_length);

  struct fb_var_screeninfo siv;
  if (ioctl(fd, FBIOGET_VSCREENINFO, &siv) < 0) {
    perror("");
    exit(EXIT_FAILURE);
  }

  printf("res x %d y %d\n", siv.xres, siv.yres);
  printf("bpp %d\n", siv.bits_per_pixel);

  exit(EXIT_SUCCESS);
}