#include <dirent.h>
#include <errno.h>
#include <string.h>
#include "__dirent.h"
#include "libc.h"

int readdir_r(DIR* restrict dir,
              struct dirent* restrict buf,
              struct dirent** restrict result) {
  struct dirent* de;
  int errno_save = errno;
  int ret;

  LOCK(dir->lock);
  errno = 0;
  de = readdir(dir);
  if ((ret = errno)) {
    UNLOCK(dir->lock);
    return ret;
  }
  errno = errno_save;
  if (de)
    memcpy(buf, de, de->d_reclen);
  else
    buf = NULL;

  UNLOCK(dir->lock);
  *result = buf;
  return 0;
}