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

int main (int argc, char **argv)
{
  int f;
  int rv;
  char buf[8192];

  f = open ("/tmp/xxxyyyzzz.dat", O_RDWR | O_CREAT | O_TRUNC, 0600);
  write (f, "Hello, world!", 13);
  close (f);
  f = open ("/tmp/xxxyyyzzz.dat", O_RDONLY | O_APPEND);
  rv = read (f, buf, 8192);
  close (f);
  printf ("Red %d bytes!\n", rv);
  return 0;
}