Re: errno from open(<directory>) ?

[Gisle Vanem]

Tim Rühsen wrote:

> Built on MinGW / Win32 the same open sets errno to EACCES.
>
>
> We currently use a work-around like
> +       int rc = open(pathname, flags, mode);
> +#ifdef _WIN32
> +       if (rc < 0 && errno == EACCES) {
> +               DWORD attrs = GetFileAttributes(pathname);
> +               if (attrs & FILE_ATTRIBUTE_DIRECTORY)
> +                       errno = EISDIR;
> +       }
> +#endif

MSDN says:
  If the function fails, the return value is INVALID_FILE_ATTRIBUTES.

which is ((DWORD)-1). So the test should better be:

  if (attr != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
    errno = EISDIR;

--
--gv