1.\" Copyright (c) 1983, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" @(#)gethostname.3 8.1 (Berkeley) 6/4/93 29.\" $FreeBSD: src/lib/libc/gen/getdomainname.3,v 1.9.2.5 2001/12/14 18:33:51 ru Exp $ 30.\" $DragonFly: src/lib/libc/gen/getdomainname.3,v 1.4 2006/05/26 19:39:36 swildner Exp $ 31.\" 32.Dd May 6, 1994 33.Dt GETDOMAINNAME 3 34.Os 35.Sh NAME 36.Nm getdomainname , 37.Nm setdomainname 38.Nd get/set domain name of current host 39.Sh LIBRARY 40.Lb libc 41.Sh SYNOPSIS 42.In unistd.h 43.Ft int 44.Fn getdomainname "char *name" "int namelen" 45.Ft int 46.Fn setdomainname "const char *name" "int namelen" 47.Sh DESCRIPTION 48.Fn Getdomainname 49returns the standard domain name for the current processor, as 50previously set by 51.Fn setdomainname . 52The parameter 53.Fa namelen 54specifies the size of the 55.Fa name 56array. The returned name is null-terminated unless insufficient 57space is provided. 58.Pp 59.Fn Setdomainname 60sets the domain name of the host machine to be 61.Fa name , 62which has length 63.Fa namelen . 64This call is restricted to the super-user and 65is normally used only when the system is bootstrapped. 66.Sh RETURN VALUES 67.Rv -std 68.Sh ERRORS 69The following errors may be returned by these calls: 70.Bl -tag -width Er 71.It Bq Er EFAULT 72The 73.Fa name 74or 75.Fa namelen 76parameter gave an 77invalid address. 78.It Bq Er EPERM 79The caller tried to set the hostname and was not the super-user. 80.El 81.Sh SEE ALSO 82.Xr gethostid 3 , 83.Xr gethostname 3 , 84.Xr sysctl 3 85.Sh HISTORY 86The 87.Fn getdomainname 88function call appeared in 89.Bx 4.2 . 90.Sh BUGS 91Domain names are limited to 92.Dv MAXHOSTNAMELEN 93(from 94.In sys/param.h ) 95characters, currently 256. 96