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 <errno.h>
49 
50 int
gethostname(char * name,int namelen)51 gethostname(char *name, int namelen)
52 {
53 	int	error;
54 
55 	error = sysinfo(SI_HOSTNAME, name, namelen);
56 	/*
57 	 * error > 0 ==> number of bytes to hold name
58 	 * and is discarded since gethostname only
59 	 * cares if it succeeded or failed
60 	 */
61 	return (error == -1 ? -1 : 0);
62 }
63 
64 int
sethostname(char * name,int namelen)65 sethostname(char *name, int namelen)
66 {
67 	int	error;
68 
69 	/*
70 	 * Check if superuser
71 	 */
72 	if (getuid()) {
73 		errno = EPERM;
74 		return (-1);
75 	}
76 	error = sysinfo(SI_SET_HOSTNAME, name, namelen);
77 	return (error == -1 ? -1 : 0);
78 }
79