From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#13298: 24.3.50; Cannot write backup file; backing up in ~\.emacs.d\%backup%~ Date: Sat, 29 Dec 2012 18:59:48 +0200 Message-ID: <83a9swlrp7.fsf@gnu.org> References: <87zk0xnc0f.fsf@yandex.ru> <83zk0xl4cv.fsf@gnu.org> <50DED342.7040901@yandex.ru> <83ip7lkqp6.fsf@gnu.org> <50DEF35F.9090107@yandex.ru> <83d2xtklu1.fsf@gnu.org> <50DEF66E.4020106@yandex.ru> <83bodclxyl.fsf@gnu.org> <50DF14C3.6040702@yandex.ru> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1356800426 3677 80.91.229.3 (29 Dec 2012 17:00:26 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 29 Dec 2012 17:00:26 +0000 (UTC) Cc: 13298@debbugs.gnu.org To: Dmitry Gutov Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sat Dec 29 18:00:42 2012 Return-path: Envelope-to: geb-bug-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 1Tozm2-0006bM-HC for geb-bug-gnu-emacs@m.gmane.org; Sat, 29 Dec 2012 18:00:38 +0100 Original-Received: from localhost ([::1]:34979 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Tozln-0007Nq-9B for geb-bug-gnu-emacs@m.gmane.org; Sat, 29 Dec 2012 12:00:23 -0500 Original-Received: from eggs.gnu.org ([208.118.235.92]:59998) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Tozlf-0007Bo-KG for bug-gnu-emacs@gnu.org; Sat, 29 Dec 2012 12:00:21 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TozlX-0000DH-DJ for bug-gnu-emacs@gnu.org; Sat, 29 Dec 2012 12:00:14 -0500 Original-Received: from debbugs.gnu.org ([140.186.70.43]:54295) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TozlX-0008W5-7z for bug-gnu-emacs@gnu.org; Sat, 29 Dec 2012 12:00:07 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.72) (envelope-from ) id 1TozmQ-0002xg-7w for bug-gnu-emacs@gnu.org; Sat, 29 Dec 2012 12:01:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 29 Dec 2012 17:01:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 13298 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 13298-submit@debbugs.gnu.org id=B13298.135680044411343 (code B ref 13298); Sat, 29 Dec 2012 17:01:02 +0000 Original-Received: (at 13298) by debbugs.gnu.org; 29 Dec 2012 17:00:44 +0000 Original-Received: from localhost ([127.0.0.1]:36313 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.72) (envelope-from ) id 1Tozm7-0002wt-Vt for submit@debbugs.gnu.org; Sat, 29 Dec 2012 12:00:44 -0500 Original-Received: from mtaout20.012.net.il ([80.179.55.166]:61309) by debbugs.gnu.org with esmtp (Exim 4.72) (envelope-from ) id 1Tozm4-0002wc-EX for 13298@debbugs.gnu.org; Sat, 29 Dec 2012 12:00:42 -0500 Original-Received: from conversion-daemon.a-mtaout20.012.net.il by a-mtaout20.012.net.il (HyperSendmail v2007.08) id <0MFS00000XQJ8U00@a-mtaout20.012.net.il> for 13298@debbugs.gnu.org; Sat, 29 Dec 2012 18:59:39 +0200 (IST) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by a-mtaout20.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0MFS000AJXVE8X10@a-mtaout20.012.net.il>; Sat, 29 Dec 2012 18:59:38 +0200 (IST) In-reply-to: <50DF14C3.6040702@yandex.ru> X-012-Sender: halo1@inter.net.il X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.13 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 140.186.70.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:69162 Archived-At: > Date: Sat, 29 Dec 2012 20:05:23 +0400 > From: Dmitry Gutov > CC: 13298@debbugs.gnu.org > > On 29.12.2012 18:44, Eli Zaretskii wrote: > >> Date: Sat, 29 Dec 2012 17:55:58 +0400 > >> From: Dmitry Gutov > >> CC: 13298@debbugs.gnu.org > >> > >> On 29.12.2012 17:51, Eli Zaretskii wrote: > >>>> Date: Sat, 29 Dec 2012 17:42:55 +0400 > >>>> From: Dmitry Gutov > >>>> CC: 13298@debbugs.gnu.org > >>>> > >>>>> Can you step with a debugger (e.g., Edebug) through > >>>>> backup-buffer-copy, and see why it errors out? My crystal ball says > >>>>> it happens because of set-file-extended-attributes, in which case > >>>>> please tell what is the value of extended-attributes argument passed > >>>>> to backup-buffer-copy. > >>>> > >>>> Indeed, it happens after a call to set-file-acl. > >>>> > >>>> ((acl . > >>>> "O:BAG:S-1-5-21-909999172-181315677-756075521-513D:(A;;FA;;;SY)(A;;FA;;;BA)(A;;FA;;;S-1-5-21-909999172-181315677-756075521-1000)") > >>>> (selinux-context nil nil nil nil)) > >>> > >>> And if, before the call to set-file-acl inside > >>> set-file-extended-attributes, you evaluate the expression > >>> > >>> (file-acl filename) > >>> > >>> what does it return? > >> > >> "O:S-1-5-21-909999172-181315677-756075521-1000G:S-1-5-21-909999172-181315677-756075521-513D:(A;;FA;;;SY)(A;;FA;;;BA)(A;;FA;;;S-1-5-21-909999172-181315677-756075521-1000)" > > > > I guess this happens because all of the following: > > > > . your user is a local Administrator > > > > . you took ownership of your ~/.emacs.d directory, instead of > > leaving it owned by the Administrators group > > The above is true. But /Users/gutov is owned by SYSTEM, FWIW. > > > . you didn't (or cannot) enable the "take ownership" privilege in > > your local security policy > > This policy's security setting says "Administrators", and my user > belongs to that group (I'm looking in Local Policies/User Rights > Assignment, is that right?). You could try explicitly allowing the privilege for your user, but I'm not sure it would help. That's the "cannot" part above: for users who are members of the Administrators group, enabling that privilege does nothing, AFAIK. Windows doesn't let such users this privilege without elevation. You can only avoid the problem by running Emacs "as Administrator" or from a shell that was run "as Administrator". > > I installed as trunk revision 111369 a set of changes that should fix > > this for you. Please test. (I could only approximate the problem on > > my machine, so I cannot be sure the changes indeed fix it.) > > It's better, but now I see these messages: > > Saving file c:/Users/gutov/.newsrc... > Error: (file-error "Setting ACL" "operation not permitted" This is what the changes intended to accomplish. In this discussion: http://lists.gnu.org/archive/html/emacs-devel/2012-12/msg00568.html I suggested to ignore these errors entirely, but others felt this was too radical, since there could be real security issues involved here. Stefan suggested using with-demoted-errors here: http://lists.gnu.org/archive/html/emacs-devel/2012-12/msg00645.html which is what Emacs does after my changes. > Like I described, I don't think my situation is exceptional, so seeing > the error messages is misleading. Why misleading? We asked Emacs to preserve the ACLs of the original file, and it couldn't. Shouldn't the user be informed about that? If you think this is bad behavior, lobby on emacs-devel to allow some kind of user options for ignoring these errors (which means you don't care about security of access to your files).