X-Recipient: archive-cygwin AT delorie DOT com X-SWARE-Spam-Status: No, hits=3.3 required=5.0 tests=AWL,BAYES_00,BOTNET,RCVD_IN_DNSWL_NONE X-Spam-Check-By: sourceware.org Message-id: <4E2895E8.6020802@cygwin.com> Date: Thu, 21 Jul 2011 17:11:04 -0400 From: "Larry Hall (Cygwin)" Reply-to: cygwin AT cygwin DOT com User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:5.0) Gecko/20110624 Thunderbird/5.0 MIME-version: 1.0 To: cygwin AT cygwin DOT com Subject: Re: [ -w filename ] returns true when permissions are -r--r--r-- References: <4E271C9E DOT 3060408 AT redhat DOT com> <2BF01EB27B56CC478AD6E5A0A28931F202EC7114 AT A1DAL1SWPES19MB DOT ams DOT acs-inc DOT net> <20110721133148 DOT GL15150 AT calimero DOT vinschen DOT de> <4E28753C DOT 2060101 AT cygwin DOT com> <20110721190120 DOT GS15150 AT calimero DOT vinschen DOT de> In-reply-to: <20110721190120.GS15150@calimero.vinschen.de> Content-type: text/plain; charset=ISO-8859-1; format=flowed Content-transfer-encoding: 7bit Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com On 7/21/2011 3:01 PM, Corinna Vinschen wrote: > On Jul 21 14:51, Larry Hall (Cygwin) wrote: >> On 7/21/2011 9:31 AM, Corinna Vinschen wrote: >>> On Jul 21 07:43, Nellis, Kenneth wrote: >>>>> From: Eric Blake >>>>> On 07/20/2011 12:05 PM, Reid Thompson wrote: >>>>>> Is this broken? Or a known windows/cygwin discrepancy? Or am I >>>>> missing >>>>>> something with my posix/windows file permissions settings >>>>> >>>>> If you are running as an administrator, that might explain it. Admins >>>>> can alter any file regardless of permissions, in which case [ -w is >>>>> telling you the truth that under your current uid, you can indeed write >>>>> to the file. >>>>> >>>>> This is a feature of access(file,W_OK), and not a bug. >>>> >>>> FWIW, I'm not running as administrator and I'm running 1.7.9, and I'm >>>> seeing the same thing: >>>> >>>> $ touch afile >>>> $ chmod 444 afile >>>> $ ls -l >>>> total 0 >>>> -r--r--r-- 1 knellis knellis 0 Jul 21 08:36 afile >>>> $ [ -w afile ]&& echo writable || echo not writable >>>> writable >>>> $ echo abc>> afile >>>> $ cat afile >>>> abc >>>> $ ls -l >>>> total 1 >>>> -r--r--r-- 1 knellis knellis 4 Jul 21 08:37 afile >>>> $ >>> >>> What system? XP, Vista? 7? >>> What's the output of `id'? >> >> Or even. ;-) > > In this case I don't think so. I can't reproduce this with 1.7.9 > either, unless the SE_BACKUP_NAME privilege is in the user token and > can be enabled by Cygwin. This is usually only the case if the user > is member of the Administrators group and the shell is not running > with a restricted token (UAC). Yikes! I didn't even notice that I pasted the wrong link. I meant . Sorry for the noise. :-( -- Larry _____________________________________________________________________ A: Yes. > Q: Are you sure? >> A: Because it reverses the logical flow of conversation. >>> Q: Why is top posting annoying in email? -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple