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From:	Achim Gratz <Stromeko AT nexgo DOT de>
To:	cygwin AT cygwin DOT com
Subject:	Re: Testers needed: New passwd/group handling in Cygwin
References:	<20140213143849 DOT GH2246 AT calimero DOT vinschen DOT de> <87fvn7cb68 DOT fsf AT Rainer DOT invalid> <20140225200414 DOT GA4238 AT calimero DOT vinschen DOT de> <loom DOT 20140310T181432-804 AT post DOT gmane DOT org> <20140310181339 DOT GF28681 AT calimero DOT vinschen DOT de>
Date:	Mon, 10 Mar 2014 19:28:59 +0100
In-Reply-To:	<20140310181339.GF28681@calimero.vinschen.de> (Corinna Vinschen's message of "Mon, 10 Mar 2014 19:13:39 +0100")
Message-ID:	<87mwgxsyac.fsf@Rainer.invalid>
User-Agent:	Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux)
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Corinna Vinschen writes:
>> (\??\X:\install\x86, 0x800390D0) st_size=0, st_mode=0x4000, st_ino=-197262732544
>                                               ^^^^^^^^^^^^^^
> This is the important snippet, but I don't see how this could have been
> different before my patches.  The mode is S_IFDIR and 000 permissions.

I've run the same on Cygwin64 (where I don't use the snapshot yet) and
it does indeed produce the same line.  It still correctly determines
that I do have permission to change into (and write in) the directory,
but I don't know how.

> That usually means:
>
> - The owner of the file, here S-1-5-21-2052111302-842925246-682003330-75441,
>   has no ACCESS_ALLOWED_ACE in the ACL, or the owner has no FILE_READ_DATA,
>   FILE_WRITE_DATA, and FILE_EXECUTE permissions on the file.
>
> - The group of the file, here S-1-5-21-2052111302-842925246-682003330-513
>   (Domain Users, apparently) has no ACCESS_ALLOWED_ACE in the ACL, or
>   the owner has no FILE_READ_DATA, FILE_WRITE_DATA, and FILE_EXECUTE
>   permissions on the file.
>
> - The Everyone group S-1-1-0 has no ACCESS_ALLOWED_ACE in the ACL, or
>   the owner has no FILE_READ_DATA, FILE_WRITE_DATA, and FILE_EXECUTE
>   permissions on the file.
>
> This stuff is entirely independent of the new passwd/group code, unless
> the owner and group are Samba Unix Users/Groups (S-1-22-[...]), in which
> case I made some changes in this area on 2014-02-27.

The owner is me and the primary group is indeed Domain Users.  As I
said, the whole share (a NetApp filer) is set up to not forbid access to
anyone except via extended security settings that enable access for a
certain AD group (and administrative access for another).  These
settings are forced upon all new files via inheritance, plus if I
managed to change this (there was such a loophole once, but it likely
has been closed) there'd be a script to periodically remove all extra
permissions.

The owner and groups are not Samba Unix as far as I can tell.

> The uid and gid values point to the fact that you're still using a
> passwd and group file.  How are your /etc/nsswitch.conf settings and
> does switching to db-only make a difference?

The same test without an /etc/passwd file produces a different uid (the
original one in /etc/passwd was actually 85441 and I just changed it to
see where it came from), I haven't yet checked if the nsswitch.conf
settings make a difference.


Regards,
Achim.
-- 
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http://Synth.Stromeko.net/Downloads.html#KorgSDada

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