/*
 * Exemplo de arquivo mapeado em memória
 */
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>

int main() {
  int fd;
  char* map, *str = "Map\n";

  if ((fd = open("teste.txt", O_RDWR | O_CREAT, 0644)) == -1) {
    perror("open");
    exit(-1);
  }

  if ((map = mmap (NULL, 100, PROT_WRITE | PROT_READ,
		   MAP_SHARED, fd, 0)) == (void*) -1) {
    perror("mmap");
    exit(-1);
  }

  strcpy(map, str);

  munmap(map, 100);

  close(fd);
  
  return 0;

}