Function p_cansee

freebsd/kern/kern_prot.c:1462–1470

- * Determine if td "can see" the subject specified by p. * Returns: 0 for permitted, an errno value otherwise * Locks: Sufficient locks to protect p->p_ucred must be held. td really * should be curthread. * References: td and p must be valid for the lifetime of the call */

 * References: td and p must be valid for the lifetime of the call
 */
int
p_cansee(struct thread *td, struct proc *p)
{

	/* Wrap cr_cansee() for all functionality. */
	KASSERT(td == curthread, ("%s: td not curthread", __func__));
	PROC_LOCK_ASSERT(p, MA_OWNED);
	return (cr_cansee(td->td_ucred, p->p_ucred));
}

/*
 * 'conservative_signals' prevents the delivery of a broad class of