/* ====================================================================
 * Task to read the fifo and output the data for the user.
 *
 * ====================================================================
 */

#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <signal.h>

static int done;
static void terminate (int dummy) { done = 1; }

int main (void)
{
   int    done = 0;
   int    fifo;
   long   interval, error;
   struct sigaction sigval;
   sigset_t  mask;

   if ((fifo = open ("/dev/rtf0", O_RDONLY)) < 0)
   {
      printf ("Failed to open fifo /dev/rtf0\n");
      exit (0);
   }

   /*
    * Set up for termination via control-C.
    */

   sigval.sa_handler = terminate;
   sigval.sa_sigaction = NULL;
   sigemptyset (&mask);
   sigval.sa_mask = mask;
   sigval.sa_flags = 0;
   sigval.sa_restorer = NULL;

   sigaction (SIGINT, &sigval, NULL);

   /*
    * Try to read the FIFO and then print the results.  
    * read will block until data is available.
    */

   while (! done)
   {
      read (fifo, &interval, sizeof (interval));
      read (fifo, &error, sizeof (error));
      printf ("Interval = %ld and Error = %ld\n", interval, error);
   }
}