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      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
     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