From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.help Subject: Re: How to reject visiting a file Date: Fri, 12 Dec 2014 10:56:53 -0500 Message-ID: References: <87oar9abdc.fsf@wanadoo.es> <83k31xs3dg.fsf@gnu.org> <87k31waoah.fsf@wanadoo.es> <87fvckan07.fsf@wanadoo.es> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1418399862 7347 80.91.229.3 (12 Dec 2014 15:57:42 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 12 Dec 2014 15:57:42 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Fri Dec 12 16:57:35 2014 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1XzSb0-00071O-Tz for geh-help-gnu-emacs@m.gmane.org; Fri, 12 Dec 2014 16:57:35 +0100 Original-Received: from localhost ([::1]:57972 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XzSb0-0006o8-JQ for geh-help-gnu-emacs@m.gmane.org; Fri, 12 Dec 2014 10:57:34 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:57875) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XzSah-0006l7-SH for help-gnu-emacs@gnu.org; Fri, 12 Dec 2014 10:57:23 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XzSaZ-0002Xh-Pj for help-gnu-emacs@gnu.org; Fri, 12 Dec 2014 10:57:15 -0500 Original-Received: from plane.gmane.org ([80.91.229.3]:45339) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XzSaZ-0002XW-IE for help-gnu-emacs@gnu.org; Fri, 12 Dec 2014 10:57:07 -0500 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1XzSaY-0006G1-0z for help-gnu-emacs@gnu.org; Fri, 12 Dec 2014 16:57:06 +0100 Original-Received: from 206-248-130-192.dsl.teksavvy.com ([206.248.130.192]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 12 Dec 2014 16:57:06 +0100 Original-Received: from monnier by 206-248-130-192.dsl.teksavvy.com with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 12 Dec 2014 16:57:06 +0100 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 23 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: 206-248-130-192.dsl.teksavvy.com User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux) Cancel-Lock: sha1:dbzehcCKUDT1yBeSQHLRDcAchfg= X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 80.91.229.3 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:101547 Archived-At: >> (defun sm-prevent-visiting-files (filename &rest _) >> (if (string-match "nasty-file-name" filename) >> (error "Bad! Bad file name! Bad!"))) >> (advice-add 'find-file-noselect :before #'sm-prevent-visiting-files) > That was my first idea, but it was discarded because I'm not sure about > its coverage. I don't know the method a given package can use to > visit/load/read a file. find-file-noselect is the "single entry" used normally to visit a file in a normal file buffer, no matter how this is triggered (find-file, find-file-other-window, clinking on an error in a *compile* buffer, ...) so it should have excellent coverage. This advice doesn't prevent Emacs from accessing the file (e.g. you can still use insert-file-contents to read the file and put it in some buffer and you can still use M-x insert-file as well), but it would be *very* weird for a package to use such an approach over just calling find-file-noselect. I'll let you judge if it's good enough for your use case. Stefan