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 1997 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
28/*	  All Rights Reserved  	*/
29
30/*
31 * University Copyright- Copyright (c) 1982, 1986, 1988
32 * The Regents of the University of California
33 * All Rights Reserved
34 *
35 * University Acknowledgment- Portions of this document are derived from
36 * software developed by the University of California, Berkeley, and its
37 * contributors.
38 */
39
40#pragma ident	"%Z%%M%	%I%	%E% SMI"
41
42/*LINTLIBRARY*/
43
44#include <sys/types.h>
45#include <sys/utsname.h>
46#include <sys/systeminfo.h>
47#include <unistd.h>
48#include <stdlib.h>
49
50#define	HOSTIDLEN	40
51
52long
53gethostid(void)
54{
55	char	name[HOSTIDLEN], *end;
56	unsigned long	hostid;
57	int	error;
58
59	error = sysinfo(SI_HW_SERIAL, name, HOSTIDLEN);
60	/*
61	 * error > 0 ==> number of bytes to hold name
62	 * and is discarded since gethostid only
63	 * cares if it succeeded or failed
64	 */
65	if (error == -1)
66		return (-1);
67	else {
68		hostid = strtoul(name, &end, 10);
69		if (hostid == 0 && end == name) {
70			return (-1);
71		}
72		return ((long) hostid);
73	}
74}
75