Function target_directory_operand

gl/lib/targetdir.c:60–76

   On failure return -2 if AT_FDCWD is -1, -1 otherwise.  */

int
target_directory_operand (char const *file, struct stat *st)
{
  if (must_be_working_directory (file))
    return AT_FDCWD;

  int fd = open (file, O_PATHSEARCH | O_DIRECTORY);

  /* On platforms lacking O_PATH, using O_SEARCH | O_DIRECTORY to
     open an overly-protected non-directory can fail with either
     EACCES or ENOTDIR.  Prefer ENOTDIR as it makes for better
     diagnostics.  */
  if (O_PATHSEARCH == O_SEARCH && fd < 0 && errno == EACCES)
    errno = stat (file, st) < 0 || S_ISDIR (st->st_mode) ? EACCES : ENOTDIR;

  return fd - (AT_FDCWD == -1 && fd < 0);
}