1.\" $NetBSD: getdomainname.3,v 1.13 2002/10/01 16:59:47 wiz Exp $ 2.\" 3.\" Copyright (c) 1983, 1991, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgement: 16.\" This product includes software developed by the University of 17.\" California, Berkeley and its contributors. 18.\" 4. Neither the name of the University nor the names of its contributors 19.\" may be used to endorse or promote products derived from this software 20.\" without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32.\" SUCH DAMAGE. 33.\" 34.\" @(#)gethostname.3 8.1 (Berkeley) 6/4/93 35.\" 36.Dd May 6, 1994 37.Dt GETDOMAINNAME 3 38.Os 39.Sh NAME 40.Nm getdomainname , 41.Nm setdomainname 42.Nd get/set domain name of current host 43.Sh LIBRARY 44.Lb libc 45.Sh SYNOPSIS 46.Fd #include \*[Lt]unistd.h\*[Gt] 47.Ft int 48.Fn getdomainname "char *name" "size_t namelen" 49.Ft int 50.Fn setdomainname "const char *name" "size_t namelen" 51.Sh DESCRIPTION 52.Fn getdomainname 53returns the standard domain name for the current processor, as 54previously set by 55.Fn setdomainname . 56The parameter 57.Fa namelen 58specifies the size of the 59.Fa name 60array. 61The returned name is null-terminated unless insufficient 62space is provided. 63.Pp 64.Fn setdomainname 65sets the 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 72If the call succeeds a value of 0 is returned. 73If the call fails, a value of \-1 is returned and an error code is 74placed in the global location 75.Va errno . 76.Sh ERRORS 77The following errors may be returned by these calls: 78.Bl -tag -width Er 79.It Bq Er EFAULT 80The 81.Fa name 82or 83.Fa namelen 84parameter gave an 85invalid address. 86.It Bq Er EPERM 87The caller tried to set the domain name and was not the super-user. 88.El 89.Sh SEE ALSO 90.Xr gethostid 3 , 91.Xr gethostname 3 , 92.Xr sysctl 3 93.Sh HISTORY 94The 95.Nm 96function call appeared in 97.Bx 4.2 . 98.Sh BUGS 99Domain names are limited to 100.Dv MAXHOSTNAMELEN 101(from 102.Ao Pa sys/param.h Ac ) 103characters including null-termination, currently 256. 104