nscd_getnetgrent in inet/getnetgrent_r.c

[Roland McGrath]

> Roland McGrath <roland@hack.frob.com> writes:
> 
> > Can someone explain the function nscd_getnetgrent and its use to me?
> 
> I think it's for parsing the data received from nscd.

Yes, I think so too.  But I don't understand exactly how it fits in.
So it's not very clear to me how it could be disabled without affecting
non-nscd cases at all.  That's why I was asking.

nss_files, nss_nis, and nss_nisplus also set the data/data_size fields of
struct __netgroup to nonzero values.  I can't quite tell if that is just
their own internal use of the same data structure, or if it's meant to be
used generically for state between multiple getnetgrent_r calls, not just
for nscd.  The real question is when __netgroup.nip is ever set to
(service_user *) -1l, as that's the condition when nscd_getnetgrent is
used.  Looking closer, __nscd_setnetgrent seems to be the only place that
sets that value, so in fact this is only for nscd.

Please verify my analysis.


Thanks,
Roland