about group membership

about group membership

[MeiJia]

Hi developers,

While i'm looking at the NFS (include v4), I didn't find any code which 
handle supplement group membership issues. so I'm curious how could NFS 
deal with following situations, or what's the plan to support:
  - normal supplement groups
  - setuid binaries
  - setgroups binaries

Thanks!

MeiJia



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Re: about group membership

[Olaf Kirch]

On Tue, May 11, 2004 at 11:12:41AM -0600, MeiJia wrote:
> While i'm looking at the NFS (include v4), I didn't find any code which 
> handle supplement group membership issues. so I'm curious how could NFS 
> deal with following situations, or what's the plan to support:
>  - normal supplement groups

Supplementary groups are transported in the AUTH_UNIX credentials.
If you you use a different authentication flavor, supplementary
groups are usually retrieved from the password database.

>  - setuid binaries

Linux nfs normally uses the effective uid in any requests
(if credentials are available; which is not a given for all
auth flavors).

There is an option to fall back to the real uid in certain cases,
but that is really more of a hack.

>  - setgroups binaries

I think we just add the effective uid to the groups vector,
if it is different from the rgid.

Olaf

-- 
Olaf Kirch     |  The Hardware Gods hate me.
okir@suse.de   |
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