/*
 * 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 argc, char** argv) {
  int fd;
  char* map;
  struct stat buf;
  int i;
  
  stat(argv[1], &buf);

  if ((fd = open(argv[1], O_RDWR, 0644)) == -1) {
    perror("open");
    return 0;
  }

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

  for (i = 0; i < buf.st_size; i++)
    printf("%c", map[i]);
  
  munmap(map, buf.st_size);

  close(fd);
  
  return 0;

}