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.\"     @(#)gethostname.3	8.1 (Berkeley) 6/4/93
.\" $FreeBSD: release/9.1.0/lib/libc/gen/getdomainname.3 165903 2007-01-09 00:28:16Z imp $
.\"
.Dd May 6, 1994
.Dt GETDOMAINNAME 3
.Os
.Sh NAME
.Nm getdomainname ,
.Nm setdomainname
.Nd get/set the NIS domain name of current host
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In unistd.h
.Ft int
.Fn getdomainname "char *name" "int namelen"
.Ft int
.Fn setdomainname "const char *name" "int namelen"
.Sh DESCRIPTION
The
.Fn getdomainname
function
returns the standard NIS domain name for the current host, as
previously set by
.Fn setdomainname .
The
.Fa namelen
argument
specifies the size of the
.Fa name
array.
The returned name is null-terminated unless insufficient
space is provided.
.Pp
The
.Fn setdomainname
function
sets the NIS domain name of the host machine to be
.Fa name ,
which has length
.Fa namelen .
This call is restricted to the super-user and
is normally used only when the system is bootstrapped.
.Sh RETURN VALUES
.Rv -std
.Sh ERRORS
The following errors may be returned by these calls:
.Bl -tag -width Er
.It Bq Er EFAULT
The
.Fa name
or
.Fa namelen
argument gave an
invalid address.
.It Bq Er EPERM
The caller tried to set the hostname and was not the super-user.
.El
.Sh SEE ALSO
.Xr gethostid 3 ,
.Xr gethostname 3 ,
.Xr sysctl 3
.Sh HISTORY
The
.Fn getdomainname
function appeared in
.Bx 4.2 .
.Sh BUGS
Domain names are limited to
.Dv MAXHOSTNAMELEN
(from
.In sys/param.h )
characters, currently 256.