From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6467DC2D0CE for ; Tue, 21 Jan 2020 12:26:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 36E1921734 for ; Tue, 21 Jan 2020 12:26:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728847AbgAUM0i (ORCPT ); Tue, 21 Jan 2020 07:26:38 -0500 Received: from mail.parknet.co.jp ([210.171.160.6]:60894 "EHLO mail.parknet.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726968AbgAUM0i (ORCPT ); Tue, 21 Jan 2020 07:26:38 -0500 Received: from ibmpc.myhome.or.jp (server.parknet.ne.jp [210.171.168.39]) by mail.parknet.co.jp (Postfix) with ESMTPSA id 08B13129664; Tue, 21 Jan 2020 21:26:37 +0900 (JST) Received: from devron.myhome.or.jp (foobar@devron.myhome.or.jp [192.168.0.3]) by ibmpc.myhome.or.jp (8.15.2/8.15.2/Debian-16) with ESMTPS id 00LCQZ9I061591 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Tue, 21 Jan 2020 21:26:36 +0900 Received: from devron.myhome.or.jp (foobar@localhost [127.0.0.1]) by devron.myhome.or.jp (8.15.2/8.15.2/Debian-16) with ESMTPS id 00LCQZK4079652 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Tue, 21 Jan 2020 21:26:35 +0900 Received: (from hirofumi@localhost) by devron.myhome.or.jp (8.15.2/8.15.2/Submit) id 00LCQYm5079651; Tue, 21 Jan 2020 21:26:34 +0900 From: OGAWA Hirofumi To: Pali =?iso-8859-1?Q?Roh=E1r?= Cc: "Theodore Y. Ts'o" , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, Namjae Jeon , Gabriel Krisman Bertazi Subject: Re: vfat: Broken case-insensitive support for UTF-8 References: <20200119221455.bac7dc55g56q2l4r@pali> <87sgkan57p.fsf@mail.parknet.co.jp> <20200120173215.GF15860@mit.edu> <87eevt4ga5.fsf@mail.parknet.co.jp> <20200121110049.4upreexmv5kxwp5n@pali> Date: Tue, 21 Jan 2020 21:26:34 +0900 In-Reply-To: <20200121110049.4upreexmv5kxwp5n@pali> ("Pali =?iso-8859-1?Q?Roh=E1r=22's?= message of "Tue, 21 Jan 2020 12:00:49 +0100") Message-ID: <87muahov0l.fsf@mail.parknet.co.jp> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Pali Rohár writes: > On Tuesday 21 January 2020 12:52:50 OGAWA Hirofumi wrote: >> BTW, VFAT has to store the both of shortname (codepage) and longname >> (UTF16), and using both names to open a file. So Windows should be using >> current locale codepage to make shortname even latest Windows for VFAT. > > fastfat.sys stores into shortnames only 7bit characters. Which is same > in all OEM codepages. Non-7bit are replaced by underline or shortened by > "~N" syntax. According to source code of fastfat.sys it has some > registry option to allow usage also of full 8bit OEM codepage. > > So default behavior seems to be safe. Are you sure if default is 7bit only? I'm pretty sure, at least, old Windows version stored 8bit chars by default install. Thanks. -- OGAWA Hirofumi