readdir_duplicate_entries.c

#include <dirent.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>


static void lookup()
{
  DIR *dirp;
  struct dirent *dp;
  int fd;

  if ((fd = open(".", O_RDONLY | O_DIRECTORY)) < 0) {
    perror("open");
    return;
  }

  if ((dirp = fdopendir(fd)) == NULL) {
    perror("couldn't open '.'");
    return;
  }

  rewinddir(dirp);

  do {
    errno = 0;
    if ((dp = readdir(dirp)) != NULL) {
      printf("%s\n", dp->d_name);
    }
  } while (dp != NULL);


  if (errno != 0)
    perror("error reading directory");

  (void) closedir(dirp);
  return;
}


int main()
{
  lookup();
  return (0);
}