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From:	Chris Faylor <cgf AT cygnus DOT com>
Date:	Mon, 13 Sep 1999 17:26:23 -0400
To:	Corinna Vinschen <corinna AT vinschen DOT de>
Cc:	DJ Delorie <dj AT delorie DOT com>, cygwin-developers AT sourceware DOT cygnus DOT com
Subject:	Re: POSIX and uid_t resp. gid_t
Message-ID:	<19990913172623.A12699@cygnus.com>
Mail-Followup-To:	Corinna Vinschen <corinna AT vinschen DOT de>,
	DJ Delorie <dj AT delorie DOT com>,
	cygwin-developers AT sourceware DOT cygnus DOT com
References:	<37DD6791 DOT 44D0748A AT vinschen DOT de> <199909132105 DOT RAA22093 AT envy DOT delorie DOT com> <37DD6BB8 DOT 499E06A4 AT vinschen DOT de>
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In-Reply-To:	<37DD6BB8.499E06A4@vinschen.de>; from Corinna Vinschen on Mon, Sep 13, 1999 at 11:25:12PM +0200

On Mon, Sep 13, 1999 at 11:25:12PM +0200, Corinna Vinschen wrote:
>DJ Delorie wrote:
>> 
>> > How are the datatypes of uid_t and gid_t defined in POSIX?
>> 
>> "All of the types listed in Table 2-1 shall be arithmetic types;"
>
>Thanks for the fast reply.
>
>This isn't the answer, I hoped to get. The problem is, that in
>a WinNT environment an arithmetic type isn't enough to get
>the information of the user and the group of an object.
>The loose translation via /etc/passwd and /etc/group will
>never be able, to reflect the ownership of objects.
>
>My idea was, to change uid_t and gid_t to the SID datatype.
>The [fl]stat-calls would return complete ownership info.
>This would be transparent to applications which never do
>"id arithmetic" as e.g. ls(1).
>
>It's too bad...

I know that some Unixes have implemented access control lists.
If you want a model to follow that might be the way to go.
I know that Digital UNIX implements this, for instance.

-chris

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