Function crcopysafe

freebsd/kern/kern_prot.c:2218–2237

}

struct ucred *
crcopysafe(struct proc *p, struct ucred *cr)
{
	struct ucred *oldcred;
	int groups;

	PROC_LOCK_ASSERT(p, MA_OWNED);

	oldcred = p->p_ucred;
	while (cr->cr_agroups < oldcred->cr_agroups) {
		groups = oldcred->cr_agroups;
		PROC_UNLOCK(p);
		crextend(cr, groups);
		PROC_LOCK(p);
		oldcred = p->p_ucred;
	}
	crcopy(cr, oldcred);

	return (oldcred);
}

/*
 * Extend the passed in credential to hold n items.