#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

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

  if ((fd = open("/dev/fb", O_RDWR)) < 0) {
    perror("/dev/fb");
    exit(1);
  }
  ioctl(fd, (('K'<<8)|10), 1);
  ioctl(fd, (('K'<<8)|10), 0);
  close(fd);
  return 0;
}