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 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 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