Re: getgrouplist implementation

[Roland McGrath]

That looks fine to me, send it to libc-hacker for approval.  I agree with
you about the choice of types in the prototype, my rationale being that it
ought to match what types getgroups uses in glibc.  I also agree that it
belongs in the same header that declares initgroups, and that we should
defer to whatever decision was made about that in glibc.  Though you might
point out on libc-hacker that setgroups and initgroups are presently
declared in <grp.h> under __USE_BSD, while the BSD practice is to declare
them in unistd.h.  (But I can see the logic that might be behind the
present placement in glibc, that being grp.h contains all functions that
use `struct group' and the database.)