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Date:	Sat, 9 May 2009 05:02:49 +0900
Message-ID:	<3f0ad08d0905081302p12091827r44e99f04c067df9f@mail.gmail.com>
Subject:	Re: [1.7][python] File operation API to multibyte filenames fails.
From:	IWAMURO Motonori <deenheart AT gmail DOT com>
To:	cygwin AT cygwin DOT com
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2009/5/9 Corinna Vinschen <corinna-cygwin AT cygwin DOT com>:
> Cool.  Thanks for the patch.  This actually solves the problem.
> I applied the patch with just a little tweak.

Thanks.

The following patch might be better.

--- a/winsup/cygwin/strfuncs.cc Thu May 07 12:29:17 2009 +0900
+++ b/winsup/cygwin/strfuncs.cc Sat May 09 04:39:49 2009 +0900
@@ -427,7 +427,9 @@
         path names) is transform_chars in path.cc. */
       if ((pw & 0xff00) =3D=3D 0xf000)
        pw &=3D 0xff;
+      int eno =3D errno;
       int bytes =3D f_wctomb (_REENT, buf, pw, charset, &ps);
+      errno =3D eno;
       /* Convert chars invalid in the current codepage to a sequence
          ASCII SO; UTF-8 representation of invalid char. */
       if (bytes =3D=3D -1 && *charset !=3D 'U'/*TF-8*/)

> Nevertheless, it looks like python has a problem as well. =A0Why does it
> check an errno if the functions returned successfully? =A0That doesn't
> sound right to me.

When the last readdir returns NULL, python detects the error because
readdir keeps previous errno.

1) ep =3D readdir(dirp); // ep->d_name =3D=3D ".", errno =3D=3D 0
   Python check only ep !=3D NULL. -> OK
2) ep =3D readdir(dirp); // ep->d_name =3D=3D "..", errno =3D=3D 0
   Python check only ep !=3D NULL. -> OK
3) ep =3D readdir(dirp); // ep->d_name =3D=3D "\xe3\x82...", errno =3D=3D 1=
38
   Python check only ep !=3D NULL. -> OK
4) ep =3D readdir(dirp); // ep->d_name =3D=3D "\xe3\x83...", errno =3D=3D 1=
38
   Python check only ep !=3D NULL. -> OK
5) ep =3D readdir(dirp); // ep =3D=3D NULL, errno =3D=3D 138
   Python check ep =3D=3D NULL and errno !=3D 0. -> Fail!
--=20
IWAMURO Motnori <http://vmi.jp/>

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