From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Paul Eggert Newsgroups: gmane.emacs.devel Subject: Improve reporting of I/O, access errors for Emacs Date: Thu, 12 Sep 2019 01:22:09 -0700 Organization: UCLA Computer Science Department Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="222904"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 To: Emacs Development Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu Sep 12 10:22:59 2019 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1i8KNX-000vrb-JN for ged-emacs-devel@m.gmane.org; Thu, 12 Sep 2019 10:22:59 +0200 Original-Received: from localhost ([::1]:59134 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i8KNW-000378-Dv for ged-emacs-devel@m.gmane.org; Thu, 12 Sep 2019 04:22:58 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:60825) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i8KMn-00034P-RW for Emacs-devel@gnu.org; Thu, 12 Sep 2019 04:22:14 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i8KMm-0003Zz-DP for Emacs-devel@gnu.org; Thu, 12 Sep 2019 04:22:13 -0400 Original-Received: from zimbra.cs.ucla.edu ([131.179.128.68]:60768) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1i8KMm-0003Z9-7u for Emacs-devel@gnu.org; Thu, 12 Sep 2019 04:22:12 -0400 Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id E38921601EE for ; Thu, 12 Sep 2019 01:22:10 -0700 (PDT) Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id t9uM3HQPZtWX for ; Thu, 12 Sep 2019 01:22:10 -0700 (PDT) Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 0BE3516022F for ; Thu, 12 Sep 2019 01:22:10 -0700 (PDT) X-Virus-Scanned: amavisd-new at zimbra.cs.ucla.edu Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id eTKLAJVE5XUW for ; Thu, 12 Sep 2019 01:22:09 -0700 (PDT) Original-Received: from [192.168.1.9] (cpe-23-242-74-103.socal.res.rr.com [23.242.74.103]) by zimbra.cs.ucla.edu (Postfix) with ESMTPSA id C54F51601EE for ; Thu, 12 Sep 2019 01:22:09 -0700 (PDT) Content-Language: en-US X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 131.179.128.68 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:239993 Archived-At: I ran into some issues where Emacs was ignoring reasonably-serious I/O errors. I went through the C source code and looked for similar issues, and fixed everything I found. The basic idea is that Emacs should signal an error for serious and unexpected I/O errors (e.g., EIO, ENAMETOOLONG) while continuing to behave as before if the problem is merely a missing file (ENOENT) or is a similarly tame error. Because the patch is a bit involved and in some places affects MS-Windows code, I've posted it here for review: https://bugs.gnu.org/37389 A half-dozen or so of the issues I found had simpler fixes, which I've already installed into master.