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

int main(int argc, char *argv[])
{

  char *path = argv[1];
  int fd;
  char *buf;
  int i;
  int zero = 0;

  if((fd = open(path, O_RDWR)) < 0){
    perror("open");
    exit(1);
  }
  
  if((buf = mmap(NULL, PAGE_SIZE, PROT_WRITE | PROT_READ,
                  MAP_SHARED, fd, 0)) == MAP_FAILED) {
    perror("mmap");
    exit(1);
  }
  printf("The str is \"%s\" (%p)\n",buf, buf);
}