#include <sys/types.h>
#include <sys/shm.h>
#include <sys/ipc.h>
#include <time.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>

#define FLEN 7000

int main() {
  int ffd;
  void *vp1;

  ffd = open("/tmp/bla", O_RDWR);
  vp1 = mmap(0, FLEN, PROT_READ | PROT_WRITE, MAP_PRIVATE, ffd, 0);

  /* return PID for checking */
  printf("My Pid is: %d\n", getpid());
  fflush(stdout);

  sleep(30);

  munmap(vp1, FLEN);
  return(0);
}