From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Juri Linkov Newsgroups: gmane.emacs.devel Subject: Magic MIME Date: Mon, 11 Feb 2008 01:18:41 +0200 Organization: JURTA Message-ID: <87prv4h032.fsf@jurta.org> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1202686397 11304 80.91.229.12 (10 Feb 2008 23:33:17 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 10 Feb 2008 23:33:17 +0000 (UTC) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Mon Feb 11 00:33:39 2008 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1JOLg0-0001bg-Jp for ged-emacs-devel@m.gmane.org; Mon, 11 Feb 2008 00:33:36 +0100 Original-Received: from localhost ([127.0.0.1] helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1JOLfX-0005u1-7V for ged-emacs-devel@m.gmane.org; Sun, 10 Feb 2008 18:33:07 -0500 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1JOLfT-0005sg-99 for emacs-devel@gnu.org; Sun, 10 Feb 2008 18:33:03 -0500 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1JOLfR-0005oI-El for emacs-devel@gnu.org; Sun, 10 Feb 2008 18:33:02 -0500 Original-Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1JOLfR-0005o5-C0 for emacs-devel@gnu.org; Sun, 10 Feb 2008 18:33:01 -0500 Original-Received: from relay01.kiev.sovam.com ([62.64.120.200]) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1JOLfQ-0000Vo-TW for emacs-devel@gnu.org; Sun, 10 Feb 2008 18:33:01 -0500 Original-Received: from [83.170.232.243] (helo=smtp.svitonline.com) by relay01.kiev.sovam.com with esmtp (Exim 4.67) (envelope-from ) id 1JOLfL-000Gzp-0V for emacs-devel@gnu.org; Mon, 11 Feb 2008 01:32:58 +0200 User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.60 (gnu/linux) X-Scanner-Signature: 7b6940144bc5d56bdacd12344196c2df X-DrWeb-checked: yes X-SpamTest-Envelope-From: juri@jurta.org X-SpamTest-Group-ID: 00000000 X-SpamTest-Header: Not Detected X-SpamTest-Info: Profiles 2212 [Feb 10 2008] X-SpamTest-Info: helo_type=3 X-SpamTest-Info: {HEADERS: header Content-Type found without required header Content-Transfer-Encoding} X-SpamTest-Method: none X-SpamTest-Rate: 11 X-SpamTest-Status: Not detected X-SpamTest-Status-Extended: not_detected X-SpamTest-Version: SMTP-Filter Version 3.0.0 [0278], KAS30/Release X-detected-kernel: by monty-python.gnu.org: FreeBSD 4.8-5.1 (or MacOS X 10.2-10.3) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:88685 Archived-At: Visiting an Arc Lisp file in Emacs fails with the error "Buffer format not recognized". Even though Emacs doesn't have an auto-mode-alist entry associated with Arc, it should visit it in fundamental-mode, not to fail trying to open it as an archive. Archive files have a well-known signature, and using content-based file type recognition rather than filename-based is more reliable. This will also improve the recognition of image file formats. Are there any obstacles to using magic-mime to determine the file type in Emacs? If linking libmagic is not possible, then maybe we could parse the magic.mime file, and even run the `file' command directly on a visited file? -- Juri Linkov http://www.jurta.org/emacs/