Doing away with NGROUPS_MAX in src/sys/sys/syslimits.h?

[ttw+bsd at cobbled.net]

On 22.03-22:33, Boris Kochergin wrote:
> Ahoy. I got bitten by this today--a system I administer for someone had 
> users in more than 16 groups, so I had to bump the value, recompile the 
> kernel, and reboot. It seems desirable to (at the very least) make this 
> a read-only tunable that can be set using /boot/loader.conf, so as to 
> avoid source modification and kernel recompilation. I had a look around, 
> and noticed that NGROUPS_MAX is used to construct static arrays in a 
> couple of locations ("ibcs2_gid_t iset[NGROUPS_MAX];"). It seems that 
> malloc(9)/MALLOC(9) can be used to allocate memory for the array 
> instead, and panic() (or something) can be called if the allocation 
> fails, no? Is that about the gist of it? If I'm not overlooking 
> something major, I'd like to take a stab at it.

i've sumbitted a patch for this to hackers@' list but actually
bumping the groups limit is more work.  i'm pretty far on with it
but am unsure wwhen it'll be completed.  if anyone wishes a copy of
the patches or current working patch then i'd be happy to post it.

note that bumping NGROUPS_MAX will do little in itself.