X-Recipient: archive-cygwin AT delorie DOT com X-Spam-Check-By: sourceware.org Date: Tue, 13 Dec 2011 16:11:16 +0100 From: Corinna Vinschen To: cygwin AT cygwin DOT com Subject: Re: Cygwin dll: UID and GID information not shown from remote drive Message-ID: <20111213151116.GF23590@calimero.vinschen.de> Reply-To: cygwin AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com References: <87d3bs4kix DOT fsf AT picasso DOT cante DOT net> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <87d3bs4kix.fsf@picasso.cante.net> User-Agent: Mutt/1.5.21 (2010-09-15) Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: 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 Dec 13 16:24, Jari Aalto wrote: > > ** To CC Emacs BTS, use 10257(at)debbugs.gnu.org > > My full original bug report was sent initially to Emacs, because the editor > started considering remotes file as read-only and requiring confirmation > after every save. See: > > http://debbugs.gnu.org/cgi/bugreport.cgi?bug=10257 > > It appears that Cygwin doesn't show UID and GID on Network drives (Win 7 > x64), that are connected with windows "Map Network Drive" to a > Debian/Samba(2.3.5.11): > > $ ls -la /cygdrive/z/tmp/test-epackage.el > -rwxr--r-- 1 ???????? ???????? 437 Dec 9 20:02 /cygdrive/z/tmp/test-epackage.el It's not a bug. If you use winbind and the user accounts are correctly mapped to Windows accounts, then you would see the Cygwin UIDs/GIDs correspoding to the SID of the AD user account. If you don't do that, there's only an invisible mapping from the Windows SID to the Unix uid/gid. The actual UNIX account has not the same mapping back to the Windows SID. Instead, the SID returned from Samba to Windows is a fake SID S-1-22-1-UnixUID or S-1-22-2-UnixGID. The easiest way to workaround this issue is to mount the share with the noacl mount option: //sambaserver/share /myserver somefs binary,noacl 0 0 Alternatively you must coax Cygwin into thinking that both SIDs are the same account. What you can do is to map these SIDs to the desired Cygwin UID/GID using matching entries in /etc/passwd and /etc/group, like this: /etc/passwd: corinna:unused:11001:11125:corinna,U-VINSCHEN\corinna,S-1-5-21-2913048732-1697188782-3448811101-1001:/home/corinna:/bin/tcsh corinna:unused:11001:99999:,S-1-22-1-500:: /etc/group vinschen:S-1-5-21-2913048732-1697188782-3448811101-1125:11125: vinschen:S-1-22-2-11125:11125: To generate the Unix SID entries for /etc/passwd and /etc/group, see the mkpasswd/mkgroup -U options: $ mkpasswd -l sambaserver -U corinna corinna:unused:10500:99999:,S-1-22-1-500:: $ mkgroup -l sambaserver -U vinschen vinschen:S-1-22-2-11125:21125: Just tweak the UID/GID fields and make sure that the Samba fake entries are later in the file than the entries with the correct Windows SID mapping. Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Project Co-Leader cygwin AT cygwin DOT com Red Hat -- 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