11.13Sabs/* $NetBSD: getdomainname.c,v 1.13 2012/06/25 22:32:43 abs Exp $ */ 21.2Scgd 31.1Scgd/* 41.1Scgd * Copyright (c) 1989, 1993 51.1Scgd * The Regents of the University of California. All rights reserved. 61.1Scgd * 71.1Scgd * Redistribution and use in source and binary forms, with or without 81.1Scgd * modification, are permitted provided that the following conditions 91.1Scgd * are met: 101.1Scgd * 1. Redistributions of source code must retain the above copyright 111.1Scgd * notice, this list of conditions and the following disclaimer. 121.1Scgd * 2. Redistributions in binary form must reproduce the above copyright 131.1Scgd * notice, this list of conditions and the following disclaimer in the 141.1Scgd * documentation and/or other materials provided with the distribution. 151.12Sagc * 3. Neither the name of the University nor the names of its contributors 161.1Scgd * may be used to endorse or promote products derived from this software 171.1Scgd * without specific prior written permission. 181.1Scgd * 191.1Scgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 201.1Scgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 211.1Scgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 221.1Scgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 231.1Scgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 241.1Scgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 251.1Scgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 261.1Scgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 271.1Scgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 281.1Scgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 291.1Scgd * SUCH DAMAGE. 301.1Scgd */ 311.1Scgd 321.4Schristos#include <sys/cdefs.h> 331.1Scgd#if defined(LIBC_SCCS) && !defined(lint) 341.2Scgd#if 0 351.2Scgdstatic char sccsid[] = "@(#)gethostname.c 8.1 (Berkeley) 6/4/93"; 361.2Scgd#else 371.13Sabs__RCSID("$NetBSD: getdomainname.c,v 1.13 2012/06/25 22:32:43 abs Exp $"); 381.2Scgd#endif 391.1Scgd#endif /* LIBC_SCCS and not lint */ 401.1Scgd 411.5Sjtc#include "namespace.h" 421.1Scgd#include <sys/param.h> 431.1Scgd#include <sys/sysctl.h> 441.8Slukem 451.8Slukem#include <assert.h> 461.8Slukem#include <errno.h> 471.4Schristos#include <unistd.h> 481.7Skleink 491.7Skleink#ifdef __weak_alias 501.11Smycroft__weak_alias(getdomainname,_getdomainname) 511.7Skleink#endif 521.1Scgd 531.3Sjtcint 541.13Sabsgetdomainname(char *name, size_t namelen) 551.1Scgd{ 561.1Scgd int mib[2]; 571.1Scgd size_t size; 581.10Sis int olderrno; 591.8Slukem 601.8Slukem _DIAGASSERT(name != NULL); 611.1Scgd 621.1Scgd mib[0] = CTL_KERN; 631.1Scgd mib[1] = KERN_DOMAINNAME; 641.1Scgd size = namelen; 651.10Sis olderrno = errno; 661.10Sis if (sysctl(mib, 2, name, &size, NULL, 0) == -1) { 671.10Sis if (errno == ENOMEM) { 681.10Sis errno = olderrno; 691.10Sis return (0); 701.10Sis } 711.1Scgd return (-1); 721.10Sis } 731.10Sis 741.1Scgd return (0); 751.1Scgd} 76