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Date: | Thu, 7 Jan 2010 19:02:14 +0100 |
From: | Corinna Vinschen <corinna-cygwin AT cygwin DOT com> |
To: | cygwin AT cygwin DOT com |
Subject: | Re: 1.7.1-1 noacl on samba share has incorrect directory write bit |
Message-ID: | <20100107180214.GP23972@calimero.vinschen.de> |
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On Jan 7 00:39, Raman Gupta wrote: > Well... yes -- at least in this case. As per the documentation > (http://www.cygwin.com/cygwin-ug-net/using.html#mount-table): > > "Cygwin ignores filesystem ACLs and only fakes a subset of > permission bits based on the DOS readonly attribute" > > On the server: > > root AT smserver foo]# ls -ald bar baz > dr-xr-sr-x. 2 root agroup 4096 2007-04-21 23:23 bar > drwxrwsr-x. 2 root agroup 4096 2007-04-21 23:23 baz > > Since the default behavior of Samba is to map the DOS read-only flag > as per the write bits (http://www.samba.org/samba/docs/man/manpages-3/smb.conf.5.html#MAPREADONLY), > the write bits carry over to the DOS readonly attribute on the > share. This can be verified via the DOS attrib command on the > client: > > Raman Gupta AT client /mnt/shar/foo > $ attrib bar > R \\smserver\smshare\foo\bar > > Raman Gupta AT client /mnt/shar/foo > $ attrib baz > \\smserver\smshare\foo\baz > > and yet, Cygwin reports owner write bit set in both cases: > > Raman Gupta AT client /mnt/shar/foo > $ ls -ald bar baz > drwxr-xr-x 1 Raman Gupta None 0 2007-04-21 23:23 bar > drwxr-xr-x 1 Raman Gupta None 0 2007-04-21 23:23 baz > > Therefore, it appears that cygwin is following its own documentation > for files but not for directories. No, it's a bit more tricky. FAT filesystems, which are the role model for noacl filesystems don't know something like a R/O directory. The DOS R/O bit on a directory does NOT mean the directory is R/O. Rather, it only means that the folder is some sort of special folder. For some better description, see http://support.microsoft.com/kb/326549. Therefore the fault is not on Cygwin's side, but on Samba's side to use the DOS R/O bit for something different than Windows uses it on directories. 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
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