From: "Chris J. Breisch" <chris.ml@breisch.org>
To: cygwin@cygwin.com
Subject: Re: Microsoft Accounts (was Re: Problem with "None" Group on Non-Domain Members)
Date: Tue, 06 May 2014 18:22:00 -0000 [thread overview]
Message-ID: <53692867.4060305@breisch.org> (raw)
In-Reply-To: <20140506171626.GZ30918@calimero.vinschen.de>
Corinna Vinschen wrote:
> On May 6 13:01, Chris J. Breisch wrote:
>> Corinna Vinschen wrote:
>>> Other than that, I'm open to discuss the necessity(?) to override
>>> the primary group by default. But, in fact, I'm not sure this really
>>> makes sense. Linux systems default to creating a user-specific group
>>> account and using that as the user's primary group for years. The
>>> Windows Account technique isn't quite as nice, but admittedly, it
>>> does its job just as well.
>> Yes, I've experienced that on Linux, but I don't recall having these
>> file permission issues there. Perhaps I just never noticed though.
>
> No, it *is* different, On Linux you get a user account called "Chris"
> and a group account called "Chris", and they are different because users
> and groups are totally different beasts on POSIX systems. You can have
> a user with uid 42 and a group with gid 42 and they are still different.
>
> On Windows, users and groups are identified not by uid/gid, but by
> their SID. The SID is a unique value, but other than that, a SID can
> be a user or a group and in lots of cases Windows doesn't care.
> A group can be owner of a file and a user can be the group of the file,
> it just doesn't matter to Windows.
>
> The permission "problem" you're seeing is a result of that. Your user
> *and* your primary group are both your user's SID. Therefore the same
> account is user and primary group at the same time. Therefore, if
> the file is created, it gets created with an ACL with user and group
> being the same account. Therefore the POSIX translation of the user
> and group permissions on the file are always the same.
>
> Does this clear it up?
Yes, that makes complete sense. Thank you again.
--
Chris J. Breisch
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next prev parent reply other threads:[~2014-05-06 18:22 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-05 13:49 Problem with "None" Group on Non-Domain Members Chris J. Breisch
2014-05-05 13:59 ` Corinna Vinschen
2014-05-05 14:17 ` Chris J. Breisch
2014-05-05 14:47 ` Corinna Vinschen
2014-05-05 15:23 ` Chris J. Breisch
2014-05-05 15:42 ` Corinna Vinschen
2014-05-05 16:17 ` Chris J. Breisch
2014-05-05 16:57 ` Corinna Vinschen
2014-05-05 18:52 ` Robert Pendell
2014-05-06 13:02 ` Corinna Vinschen
2014-05-05 18:56 ` Chris J. Breisch
2014-05-05 19:44 ` Larry Hall (Cygwin)
2014-05-05 21:57 ` Chris J. Breisch
2014-05-05 22:07 ` Chris J. Breisch
2014-05-05 22:29 ` Larry Hall (Cygwin)
2014-05-05 22:39 ` Chris J. Breisch
2014-05-06 0:43 ` Larry Hall (Cygwin)
2014-05-06 12:23 ` Chris J. Breisch
2014-05-05 22:09 ` Larry Hall (Cygwin)
2014-05-06 12:52 ` Microsoft Accounts (was Re: Problem with "None" Group on Non-Domain Members) Corinna Vinschen
2014-05-06 12:55 ` Corinna Vinschen
2014-05-06 13:01 ` Corinna Vinschen
2014-05-07 12:26 ` vlado99
2014-05-07 12:43 ` Corinna Vinschen
2014-05-06 17:01 ` Chris J. Breisch
2014-05-06 17:16 ` Corinna Vinschen
2014-05-06 18:22 ` Chris J. Breisch [this message]
2014-05-07 11:57 ` Corinna Vinschen
2014-05-07 12:40 ` Corinna Vinschen
2014-05-07 14:09 ` Chris J. Breisch
2014-05-07 14:46 ` Corinna Vinschen
2014-05-08 20:09 ` Corinna Vinschen
2014-05-08 23:18 ` Robert Pendell
2014-05-09 0:12 ` Ken Brown
2014-05-09 1:34 ` Robert Pendell
2014-05-09 6:11 ` Achim Gratz
2014-05-09 7:42 ` Corinna Vinschen
2014-05-07 14:05 ` Andrey Repin
2014-05-07 14:20 ` Corinna Vinschen
2014-05-07 14:43 ` Corinna Vinschen
2014-05-07 14:05 ` Chris J. Breisch
2014-05-07 14:35 ` Corinna Vinschen
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