#include <stdio.h>
#include<stdlib.h>
#include <unistd.h>
#include <linux/ioctl.h>
#include <linux/parport.h>
#include <linux/ppdev.h>
#include <fcntl.h>
#include <sys/time.h>

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

  fd = open("/dev/parport0",O_RDWR);
  if (fd == -1)
  {
    perror("open");
    exit(1);
  }
  if (ioctl(fd,PPCLAIM))
  {
    perror("PPCLAIM");
    close(fd);
    exit(1);
  }
  if (ioctl(fd, PPGETTIME, &tv))
  {
    perror ("PPNEGOT");
    close (fd);
    return 1;
  }
  printf("sec %u usec %u\n",tv.tv_sec, tv.tv_usec);
  tv.tv_sec = 50;
  tv.tv_usec = 1000;
  if (ioctl(fd, PPSETTIME, &tv))
  {
    perror ("PPNEGOT");
    close (fd);
    return 1;
  }
  if (ioctl(fd, PPGETTIME, &tv))
  {
    perror ("PPNEGOT");
    close (fd);
    return 1;
  }
  printf("sec %u usec %u\n",tv.tv_sec, tv.tv_usec);
  ioctl (fd, PPRELEASE);
  close(fd);
}