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. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)gethostname.3 8.1 (Berkeley) 6/4/93 33.\" $Id$ 34.\" 35.Dd May 6, 1994 36.Dt GETDOMAINNAME 3 37.Os BSD 4.2 38.Sh NAME 39.Nm getdomainname , 40.Nm setdomainname 41.Nd get/set domain name of current host 42.Sh SYNOPSIS 43.Fd #include <unistd.h> 44.Ft int 45.Fn getdomainname "char *name" "int namelen" 46.Ft int 47.Fn setdomainname "const char *name" "int namelen" 48.Sh DESCRIPTION 49.Fn Getdomainname 50returns the standard domain name for the current processor, as 51previously set by 52.Fn setdomainname . 53The parameter 54.Fa namelen 55specifies the size of the 56.Fa name 57array. The returned name is null-terminated unless insufficient 58space is provided. 59.Pp 60.Fn Setdomainname 61sets the domain name of the host machine to be 62.Fa name , 63which has length 64.Fa namelen . 65This call is restricted to the super-user and 66is normally used only when the system is bootstrapped. 67.Sh RETURN VALUES 68If the call succeeds a value of 0 is returned. If the call 69fails, a value of -1 is returned and an error code is 70placed in the global location 71.Va errno . 72.Sh ERRORS 73The following errors may be returned by these calls: 74.Bl -tag -width Er 75.It Bq Er EFAULT 76The 77.Fa name 78or 79.Fa namelen 80parameter gave an 81invalid address. 82.It Bq Er EPERM 83The caller tried to set the hostname and was not the super-user. 84.El 85.Sh SEE ALSO 86.Xr gethostid 3 , 87.Xr gethostname 3 , 88.Xr sysctl 3 89.Sh BUGS 90Domain names are limited to 91.Dv MAXHOSTNAMELEN 92(from 93.Ao Pa sys/param.h Ac ) 94characters, currently 256. 95.Sh HISTORY 96The 97.Fn getdomainname 98function call appeared in 99.Bx 4.2 . 100