From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 12841 invoked by alias); 14 Aug 2019 16:59:34 -0000 Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Received: (qmail 12813 invoked by uid 89); 14 Aug 2019 16:59:34 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-2.5 required=5.0 tests=AWL,BAYES_00,RCVD_IN_DNSWL_LOW,SPF_PASS autolearn=ham version=3.3.1 spammy= X-HELO: vsmx009.vodafonemail.xion.oxcs.net Received: from vsmx009.vodafonemail.xion.oxcs.net (HELO vsmx009.vodafonemail.xion.oxcs.net) (153.92.174.87) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Wed, 14 Aug 2019 16:59:31 +0000 Received: from vsmx001.vodafonemail.xion.oxcs.net (unknown [192.168.75.191]) by mta-5-out.mta.xion.oxcs.net (Postfix) with ESMTP id 51AAAC0BC0 for ; Wed, 14 Aug 2019 16:59:28 +0000 (UTC) Received: from Rainer.invalid (unknown [91.47.53.40]) by mta-5-out.mta.xion.oxcs.net (Postfix) with ESMTPA id 258323005AC for ; Wed, 14 Aug 2019 16:59:25 +0000 (UTC) From: Achim Gratz To: cygwin@cygwin.com Subject: Re: SMBFS mount's file cannot be made executable References: Date: Wed, 14 Aug 2019 16:59:00 -0000 In-Reply-To: (Anton C. via cygwin Lavrentiev's message of "Wed, 14 Aug 2019 00:53:32 +0000") Message-ID: <8736i3ptsp.fsf@Rainer.invalid> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-SW-Source: 2019-08/txt/msg00179.txt.bz2 Lavrentiev, Anton (NIH/NLM/NCBI) [C] via cygwin writes: >> If it's related to the ACL handling then it should start working when >> you remove the ACL on the file with 'setfacl -kb ...' > > There are no special ACLs set on the file (that was just produced by > GCC from the source code, see my first email). You earlier showed this: > $ ls -l a.exe > -rw-rw-r--+ 1 lavr cppcore 157753 Aug 13 08:20 a.exe See the '+' at the end of the modes? That's telling you that there is an ACL added to the file and the modes are the result of combining thje actual mode bits with the ACL. As you said, gcc won't add any ACL by itself, so these ACL are the result of inheritable / default ACL. > But I am now convinced that the problem is _entirely_ in Cygwin's corner: Maybe, but we'd still need to know how to get to the result you're seeing. > When I open that file's the "Properties->Security" Windows tab, I can > see that my permissions are "Read" and "Write", yet "Read & Execute" > is NOT checked. When I check it, I see that the file becomes > executable (the "x" bit) from both Cygwin shell and on the Linux side, > too. And after that, I can execute the file from the Cygwin shell. I hope it's clear to you that the permissions you see on this tab have nothing to do with the POSIX mode bits you're trying to set from Cygwin. > So what happens is that when "chmod" (or "creat" with a permission > mask) is called, Cygwin does not honor the "x" bit(s) and does not > convert it to a corresponding proper ACL for the Windows mounted > filesystem (and that ACL, in turn, would have been then sent to SMBD > to get converted there back to the "x" bit in the Unix world). Once > the "x" is there, Windows(via SMBD) obviously allows execution of the > image. Here's a related "bug": Most often that is the result of an inherited ACL mask that clears that bit. Correcting either the default ACL or removing it should then make that problem go away. Default ACL are associated with the parent directory and you're unlikely to be able to change the parent directory modes if it's the root of a file system exported from a filer. Try again in a subdirectory and clear the default ACL with 'setfacl -kb' on that directory before you start doing anything there. Regards, Achim. -- +<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+ Factory and User Sound Singles for Waldorf Blofeld: http://Synth.Stromeko.net/Downloads.html#WaldorfSounds -- 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