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.Dd May 6, 1994 29.Dt GETDOMAINNAME 3 30.Os 31.Sh NAME 32.Nm getdomainname , 33.Nm setdomainname 34.Nd get/set the NIS domain name of current host 35.Sh LIBRARY 36.Lb libc 37.Sh SYNOPSIS 38.In unistd.h 39.Ft int 40.Fn getdomainname "char *name" "int namelen" 41.Ft int 42.Fn setdomainname "const char *name" "int namelen" 43.Sh DESCRIPTION 44The 45.Fn getdomainname 46function 47returns the standard NIS domain name for the current host, as 48previously set by 49.Fn setdomainname . 50The 51.Fa namelen 52argument 53specifies the size of the 54.Fa name 55array. 56The returned name is null-terminated unless insufficient 57space is provided. 58.Pp 59The 60.Fn setdomainname 61function 62sets the NIS domain name of the host machine to be 63.Fa name , 64which has length 65.Fa namelen . 66This call is restricted to the super-user and 67is normally used only when the system is bootstrapped. 68.Sh RETURN VALUES 69.Rv -std 70.Sh ERRORS 71The following errors may be returned by these calls: 72.Bl -tag -width Er 73.It Bq Er EFAULT 74The 75.Fa name 76or 77.Fa namelen 78argument gave an 79invalid address. 80.It Bq Er EPERM 81The caller tried to set the hostname and was not the super-user. 82.El 83.Sh SEE ALSO 84.Xr gethostid 3 , 85.Xr gethostname 3 , 86.Xr sysctl 3 87.Sh HISTORY 88The 89.Fn getdomainname 90function appeared in 91.Bx 4.2 . 92.Sh BUGS 93Domain names are limited to 94.Dv MAXHOSTNAMELEN 95(from 96.In sys/param.h ) 97characters, currently 256. 98