From mboxrd@z Thu Jan  1 00:00:00 1970
Path: main.gmane.org!not-for-mail
From: "Jan D." <jan.h.d@swipnet.se>
Newsgroups: gmane.emacs.devel
Subject: Re: Strange behaviour with dired and UTF8
Date: Sat, 3 May 2003 20:11:44 +0200
Sender: emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org
Message-ID: <B2949A7D-7D92-11D7-BBF7-00039363E640@swipnet.se>
References: <E19ByYD-0000t0-00@fencepost.gnu.org>
NNTP-Posting-Host: main.gmane.org
Mime-Version: 1.0 (Apple Message framework v552)
Content-Type: text/plain; charset=US-ASCII; format=flowed
Content-Transfer-Encoding: 7bit
X-Trace: main.gmane.org 1051985601 4538 80.91.224.249 (3 May 2003 18:13:21 GMT)
X-Complaints-To: usenet@main.gmane.org
NNTP-Posting-Date: Sat, 3 May 2003 18:13:21 +0000 (UTC)
Cc: Kenichi Handa <handa@m17n.org>
Original-X-From: emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org Sat May 03 20:13:19 2003
Return-path: <emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org>
Original-Received: from quimby.gnus.org ([80.91.224.244])
	by main.gmane.org with esmtp (Exim 3.35 #1 (Debian))
	id 19C1VC-00019e-00
	for <emacs-devel@main.gmane.org>; Sat, 03 May 2003 20:12:50 +0200
Original-Received: from monty-python.gnu.org ([199.232.76.173])
	by quimby.gnus.org with esmtp (Exim 3.12 #1 (Debian))
	id 19C1XG-000377-00
	for <emacs-devel@quimby.gnus.org>; Sat, 03 May 2003 20:15:03 +0200
Original-Received: from localhost ([127.0.0.1] helo=monty-python.gnu.org)
	by monty-python.gnu.org with esmtp (Exim 4.10.13)
	id 19C1Vj-0004bz-02
	for emacs-devel@quimby.gnus.org; Sat, 03 May 2003 14:13:23 -0400
Original-Received: from list by monty-python.gnu.org with tmda-scanned (Exim 4.10.13)
	id 19C1V4-00049r-00
	for emacs-devel@gnu.org; Sat, 03 May 2003 14:12:42 -0400
Original-Received: from mail by monty-python.gnu.org with spam-scanned (Exim 4.10.13)
	id 19C1V2-00048O-00
	for emacs-devel@gnu.org; Sat, 03 May 2003 14:12:41 -0400
Original-Received: from stubby.bodenonline.com ([193.201.16.94])
	by monty-python.gnu.org with esmtp (Exim 4.10.13)
	id 19C1Uw-00044A-00; Sat, 03 May 2003 14:12:35 -0400
Original-Received: from accessno42.bodenonline.com
	(IDENT:root@accessno42.bodenonline.com [193.201.16.44])
	h43J3AbL015610;	Sat, 3 May 2003 21:03:11 +0200
Original-To: rms@gnu.org
In-Reply-To: <E19ByYD-0000t0-00@fencepost.gnu.org>
X-Mailer: Apple Mail (2.552)
Original-cc: emacs-devel@gnu.org
X-BeenThere: emacs-devel@gnu.org
X-Mailman-Version: 2.1b5
Precedence: list
List-Id: Emacs development discussions. <emacs-devel.gnu.org>
List-Help: <mailto:emacs-devel-request@gnu.org?subject=help>
List-Post: <mailto:emacs-devel@gnu.org>
List-Subscribe: <http://mail.gnu.org/mailman/listinfo/emacs-devel>,
	<mailto:emacs-devel-request@gnu.org?subject=subscribe>
List-Archive: <http://mail.gnu.org/pipermail/emacs-devel>
List-Unsubscribe: <http://mail.gnu.org/mailman/listinfo/emacs-devel>,
	<mailto:emacs-devel-request@gnu.org?subject=unsubscribe>
Errors-To: emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org
Xref: main.gmane.org gmane.emacs.devel:13660
X-Report-Spam: http://spam.gmane.org/gmane.emacs.devel:13660

> It would be fundamentally clean to make sure that decoding of file
> names is never many-one.  Is that possible?  Some of your messages
> suggest it is already the case.

I don't think it is possible as long as Emacs only has one file
system encoding (file-name-coding-system).

The original problem is this:

file-name-coding-system is latin-1
Open dired on a directory with UTF-8 file names.
Do C-x RET r utf-8.
Try to operate on a file with non-ascii characters gives
   "File no longer exists; type `g' to update Dired buffer"

This is because when decoding the file name Emacs uses latin-1 and thus
doesn't get the original file name back.

As long as there can be file names with different encodings this problem
can occur.

	Jan D.