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 (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2009 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 * Portions of this source code were derived from Berkeley 4.3 BSD
32 * under license from the Regents of the University of California.
33 */
34
35 #include "lint.h"
36 #include <sys/types.h>
37 #include <sys/systeminfo.h>
38 #include <stdlib.h>
39
40 long
gethostid(void)41 gethostid(void)
42 {
43 char name[HW_HOSTID_LEN], *end;
44 unsigned long hostid;
45
46 /*
47 * HW_INVALID_HOSTID must be cast to an int to ensure that it's sign
48 * extended to 64 bits in 64-bit builds.
49 */
50 if (sysinfo(SI_HW_SERIAL, name, sizeof (name)) == -1)
51 return ((int)HW_INVALID_HOSTID);
52 hostid = strtoul(name, &end, 10);
53 if (end == name)
54 return ((int)HW_INVALID_HOSTID);
55 return ((long)hostid);
56 }
57