1.\" $NetBSD: getdomainname.3,v 1.11 2002/02/07 07:00:12 ross 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. The returned name is null-terminated unless insufficient 61space is provided. 62.Pp 63.Fn setdomainname 64sets the domain name of the host machine to be 65.Fa name , 66which has length 67.Fa namelen . 68This call is restricted to the super-user and 69is normally used only when the system is bootstrapped. 70.Sh RETURN VALUES 71If the call succeeds a value of 0 is returned. If the call 72fails, a value of -1 is returned and an error code is 73placed in the global location 74.Va errno . 75.Sh ERRORS 76The following errors may be returned by these calls: 77.Bl -tag -width Er 78.It Bq Er EFAULT 79The 80.Fa name 81or 82.Fa namelen 83parameter gave an 84invalid address. 85.It Bq Er EPERM 86The caller tried to set the domain name and was not the super-user. 87.El 88.Sh SEE ALSO 89.Xr gethostid 3 , 90.Xr gethostname 3 , 91.Xr sysctl 3 92.Sh HISTORY 93The 94.Nm 95function call appeared in 96.Bx 4.2 . 97.Sh BUGS 98Domain names are limited to 99.Dv MAXHOSTNAMELEN 100(from 101.Ao Pa sys/param.h Ac ) 102characters including null-termination, currently 256. 103