1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 * Copyright 2011 Joyent, Inc.  All rights reserved.
26 */
27
28#include <sys/types.h>
29#include <sys/systm.h>
30#include <sys/errno.h>
31#include <sys/loadavg.h>
32#include <sys/zone.h>
33#include <sys/pool_pset.h>
34
35/*
36 * Extract elements of the raw avenrun array from the kernel for the
37 * implementation of getloadavg(3c)
38 */
39int
40getloadavg(int *buf, int nelem)
41{
42	int *loadbuf = &avenrun[0];
43	int error;
44
45	if (nelem < 0)
46		return (set_errno(EINVAL));
47	if (nelem > LOADAVG_NSTATS)
48		nelem = LOADAVG_NSTATS;
49
50	if (!INGLOBALZONE(curproc)) {
51		loadbuf = &curproc->p_zone->zone_avenrun[0];
52	}
53
54	error = copyout(loadbuf, buf, nelem * sizeof (avenrun[0]));
55	if (error)
56		return (set_errno(EFAULT));
57	return (nelem);
58}
59