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.\" $FreeBSD$ 30.\" 31.Dd May 6, 1994 32.Dt GETDOMAINNAME 3 33.Os 34.Sh NAME 35.Nm getdomainname , 36.Nm setdomainname 37.Nd get/set the NIS domain name of current host 38.Sh LIBRARY 39.Lb libc 40.Sh SYNOPSIS 41.In unistd.h 42.Ft int 43.Fn getdomainname "char *name" "int namelen" 44.Ft int 45.Fn setdomainname "const char *name" "int namelen" 46.Sh DESCRIPTION 47The 48.Fn getdomainname 49function 50returns the standard NIS domain name for the current host, as 51previously set by 52.Fn setdomainname . 53The 54.Fa namelen 55argument 56specifies the size of the 57.Fa name 58array. 59The returned name is null-terminated unless insufficient 60space is provided. 61.Pp 62The 63.Fn setdomainname 64function 65sets the NIS domain name of the host machine to be 66.Fa name , 67which has length 68.Fa namelen . 69This call is restricted to the super-user and 70is normally used only when the system is bootstrapped. 71.Sh RETURN VALUES 72.Rv -std 73.Sh ERRORS 74The following errors may be returned by these calls: 75.Bl -tag -width Er 76.It Bq Er EFAULT 77The 78.Fa name 79or 80.Fa namelen 81argument gave an 82invalid address. 83.It Bq Er EPERM 84The caller tried to set the hostname and was not the super-user. 85.El 86.Sh SEE ALSO 87.Xr gethostid 3 , 88.Xr gethostname 3 , 89.Xr sysctl 3 90.Sh HISTORY 91The 92.Fn getdomainname 93function appeared in 94.Bx 4.2 . 95.Sh BUGS 96Domain names are limited to 97.Dv MAXHOSTNAMELEN 98(from 99.In sys/param.h ) 100characters, currently 256. 101