Re: ntsec patch 1: uid==gid, chmod, alloc_sd, is_grp_member

[Corinna Vinschen <cygwin-patches at cygwin dot com>]

On Thu, Nov 14, 2002 at 12:03:24PM -0500, Pierre A. Humblet wrote:
> If you are emulated, you already have the token in the cygheap->user.
> There is no need to open the thread, see how it's done e.g.in setegid.

Good point.

> You want to know if the file owner uid is in the group of the file gid.
> Write a new routine scanning the /etc/group file until you find the gid.
> Then scan the members of that group to see if the uid is in it.
> That's it (well, there will be mutex too, against threads rereading /etc/group).

Also a good point.  I'm going to rewrite is_grp_member().

Corinna

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Corinna Vinschen                  Please, send mails regarding Cygwin to
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