[OpenAFS] retaining AFS-specific nameless group IDs (PAG) in `id' and `groups'

[Jim Meyering]

Jim Meyering <jim@meyering.net> wrote:
> Didi <ribalba@gmail.com> wrote:
>>>  If by "unknown" you mean nameless, that's not what the patch does.
>>>  Such a patch would not even have been considered.
>>
>> I agree that hiding this information in some cases might not be
>> optimal, but the main problem is that through this the 'groups'
>> command becomes utterly useless and confused quite a lot of users.
>> $ groups
>> users id: cannot find name for group ID 1091323188
>> 1091323188
>>
>> further
>>
>> $ id -Gn
>> users id: cannot find name for group ID 1091323188
>> 1091323188
>
> If someone can provide code to determine efficiently
> whether a nameless GID is a PAG then we can probably
> make everyone happy.  If that happens, I'll need to
> know if there's a standard or accepted mapping from
> GID to PAG group name.  Pointers to unencumbered code
> would be welcome.

Since you guys are interested in AFS, I'm hoping one of you will
respond to the above.  I'll wait a few days, after which, if I don't
hear anything, I'll just revert to the old behavior.

Ideally, someone would write a patch (just outlining it is better
if you haven't already sent in FSF copyright paperwork for coreutils)
to fake a group name for a nameless group ID that is a PAG.

A hint for the ambitious: Davor Ocelic suggested that
libnss-afs already does at least some of this...