#include <sys/select.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <linux/fb.h>
#include <unistd.h>
#include <stdio.h>
#include <signal.h>
 
#define FRAMEBUFFER_DEVICE "/dev/fb0"
 
void alarm_handler(int);
 
int main(int argc, char **argv)
{
  int kbdFD = -1;
  kbdFD = open("/dev/keypad0", O_RDONLY | O_NDELAY, 0);
  if (kbdFD < 0)
    exit(1);
  char buf[64];
  int pressed = 0;
  int done = 0;
  char *answer = "WTF?!";
  alarm(1);
  signal(SIGALRM, alarm_handler);
  while (!done)
  {
    int fbh = open(FRAMEBUFFER_DEVICE, O_RDWR);
    ioctl(fbh, FBIOSETBKLIGHT, BKLIGHT_ON);
    ioctl(fbh, FBIOSETBRIGHTNESS, 30);
    close(fbh);
 
    fd_set fds;
    struct timeval tv;
    int retval;
    tv.tv_sec = 1;
    tv.tv_usec = 0;
    FD_ZERO(&fds);
    FD_SET(kbdFD, &fds);
    retval = select(kbdFD+1, &fds, NULL, NULL, &tv);
 
    int i;
    if (FD_ISSET(kbdFD, &fds))
    {
      int n = read(kbdFD, buf, 64);
      for (i=0; i<n && !done; i++)
      {
//        printf("key 0x%X\n", buf[i]);
        switch(buf[i])
        {
          case 0x80:
            if (pressed)
              done = 1;
            break;
          case 0x25:
            pressed = 1;
            answer = "left_up";
            break;
          case 0x19:
            pressed = 1;
            answer = "right_up";
            break;
 
        }
      }
    }
  }
  lseek(kbdFD, 0, SEEK_END);
  close(kbdFD);
  printf("%s\n", answer);
  return 0;
}
 
void alarm_handler(int sig) {
  exit(0);
}