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 /*LINTLIBRARY*/
41
42 #include <sys/types.h>
43 #include <sys/utsname.h>
44 #include <sys/systeminfo.h>
45 #include <unistd.h>
46 #include <errno.h>
47
48 int
gethostname(char * name,int namelen)49 gethostname(char *name, int namelen)
50 {
51 int error;
52
53 error = sysinfo(SI_HOSTNAME, name, namelen);
54 /*
55 * error > 0 ==> number of bytes to hold name
56 * and is discarded since gethostname only
57 * cares if it succeeded or failed
58 */
59 return (error == -1 ? -1 : 0);
60 }
61
62 int
sethostname(char * name,int namelen)63 sethostname(char *name, int namelen)
64 {
65 int error;
66
67 /*
68 * Check if superuser
69 */
70 if (getuid()) {
71 errno = EPERM;
72 return (-1);
73 }
74 error = sysinfo(SI_SET_HOSTNAME, name, namelen);
75 return (error == -1 ? -1 : 0);
76 }
77