From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Ken Brown Newsgroups: gmane.emacs.bugs Subject: bug#10257: 23.3.1 Cygwin: network drives - file is write protected (false positive) Date: Wed, 14 Dec 2011 09:19:16 -0500 Message-ID: <4EE8B064.8080803@cornell.edu> References: <87aa71mwng.fsf@picasso.cante.net> <4EE270AA.2080702@cornell.edu> <20111210095858.GA19881@cante.cante.net> <4EE742B0.1080703@cornell.edu> <20111213140042.GA22678@picasso.cante.net> <4EE76B6E.7070904@cornell.edu> <4EE7B2A9.6060308@cornell.edu> <4EE8178F.5040004@cornell.edu> <87liqf1t04.fsf@picasso.cante.net> <4EE89590.2040503@cornell.edu> <4EE89CAB.8080301@cornell.edu> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Trace: dough.gmane.org 1323872390 20589 80.91.229.12 (14 Dec 2011 14:19:50 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Wed, 14 Dec 2011 14:19:50 +0000 (UTC) Cc: 10257@debbugs.gnu.org, jari.aalto@cante.net To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Wed Dec 14 15:19:44 2011 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([140.186.70.17]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1RapgN-0007WE-Jk for geb-bug-gnu-emacs@m.gmane.org; Wed, 14 Dec 2011 15:19:43 +0100 Original-Received: from localhost ([::1]:36398 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RapgN-000291-4F for geb-bug-gnu-emacs@m.gmane.org; Wed, 14 Dec 2011 09:19:43 -0500 Original-Received: from eggs.gnu.org ([140.186.70.92]:36935) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RapgK-00028U-0f for bug-gnu-emacs@gnu.org; Wed, 14 Dec 2011 09:19:41 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1RapgI-0001Qt-O1 for bug-gnu-emacs@gnu.org; Wed, 14 Dec 2011 09:19:39 -0500 Original-Received: from debbugs.gnu.org ([140.186.70.43]:36886) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RapgI-0001Qe-MP for bug-gnu-emacs@gnu.org; Wed, 14 Dec 2011 09:19:38 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.69) (envelope-from ) id 1Raphe-0005ag-6x for bug-gnu-emacs@gnu.org; Wed, 14 Dec 2011 09:21:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Ken Brown Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 14 Dec 2011 14:21:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 10257 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 10257-submit@debbugs.gnu.org id=B10257.132387244521460 (code B ref 10257); Wed, 14 Dec 2011 14:21:02 +0000 Original-Received: (at 10257) by debbugs.gnu.org; 14 Dec 2011 14:20:45 +0000 Original-Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1RaphM-0005a3-2E for submit@debbugs.gnu.org; Wed, 14 Dec 2011 09:20:44 -0500 Original-Received: from granite1.mail.cornell.edu ([128.253.83.141] helo=authusersmtp.mail.cornell.edu) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1RaphJ-0005Zv-89 for 10257@debbugs.gnu.org; Wed, 14 Dec 2011 09:20:42 -0500 Original-Received: from [128.84.234.240] (dhcp240.math.cornell.edu [128.84.234.240]) (authenticated bits=0) by authusersmtp.mail.cornell.edu (8.14.4/8.12.10) with ESMTP id pBEEJFo9010332 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT); Wed, 14 Dec 2011 09:19:15 -0500 (EST) User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0) Gecko/20111105 Thunderbird/8.0 In-Reply-To: X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list Resent-Date: Wed, 14 Dec 2011 09:21:02 -0500 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) 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:54952 Archived-At: On 12/14/2011 8:10 AM, Eli Zaretskii wrote: >> Date: Wed, 14 Dec 2011 07:55:07 -0500 >> From: Ken Brown >> CC: 10257@debbugs.gnu.org, Jari Aalto >> >> As I understand it, this is a filesystem problem: Samba returns a >> fake SID to Windows, so Cygwin can't determine the correct uid/gid. >> Jari, you were already told on the Cygwin list how to work around >> this problem. Why not just do it? > > Either that, or make euidaccess/check_writable return success in such > cases. I don't know how to determine what "such cases" are. In the case at hand, Jari has a network filesystem that is configured in such a way that the uid/gid of a file can't be determined by standard system calls. As explained on the Cygwin list, he can set up his /etc/passwd and /etc/group to work around this. [He has to map the fake SID returned by Samba to a real one.] If he doesn't want to do that, I think it would clearly be wrong for euidaccess to return success. Maybe check_writable could be a little more lenient, but I'm not sure what the implications of that would be. Ken