NGROUP increase - thoughts

NGROUP increase - thoughts

[Tim Hockin]

I'm sure this has been given thought, so I want to probe teh collective
resources.  We need to have users in more than 32 groups.  In fact, they
may need to be a member of MANY more groups than that.

What is the current thinking on this problem?  Would it be desirable to
replace current->groups[NGROUPS] with a poibnter to an array?  Thus
allowing (with libc changes) many more groups?

Comments, please.
Tim
-- 
Tim Hockin
Systems Software Engineer
Sun Microsystems, Cobalt Server Appliances
thockin@sun.com

Re: NGROUP increase - thoughts

[Andreas Dilger]

You write:
> I'm sure this has been given thought, so I want to probe teh collective
> resources.  We need to have users in more than 32 groups.  In fact, they
> may need to be a member of MANY more groups than that.
> 
> What is the current thinking on this problem?  Would it be desirable to
> replace current->groups[NGROUPS] with a poibnter to an array?  Thus
> allowing (with libc changes) many more groups?

The real solution is ACLs (if you are talking filesystem permissions).
See acl.bestbits.at, I think, for ext2 ACL/EA patch.

Cheers, Andreas
-- 
Andreas Dilger  \ "If a man ate a pound of pasta and a pound of antipasto,
                 \  would they cancel out, leaving him still hungry?"
http://www-mddsp.enel.ucalgary.ca/People/adilger/               -- Dogbert