chgproccnt
(void)chgproccnt(p->p_ucred->cr_uidinfo, 1, 0);
chgproccnt(p->p_ucred->cr_ruidinfo, -1, 0);
ok = chgproccnt(lp1->lwp_thread->td_ucred->cr_ruidinfo, 1,
chgproccnt(cr->cr_ruidinfo, -1, 0);
chgproccnt(cr->cr_ruidinfo, 1, 0);
int chgproccnt (struct uidinfo *uip, int diff, int max);