#include <sys/types.h>
#include <dirent.h>
#include <errno.h>
#include <stdio.h>

main() {
  int return_code;
  DIR *dir;
  struct dirent entry;
  struct dirent *result;

  if ((dir = opendir(".")) == NULL)
    perror("opendir() error");
  else {
 //   puts("contents of .:");
    for (return_code = readdir_r(dir, &entry, &result);
         result != NULL && return_code == 0;
         return_code = readdir_r(dir, &entry, &result))
      printf("%s\n", entry.d_name);
    if (return_code != 0)
      perror("readdir_r() error");
    closedir(dir);
  }
}