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.\"     @(#)gethostid.3	8.1 (Berkeley) 6/2/93
.\" $FreeBSD$
.\"
.Dd June 2, 1993
.Dt GETHOSTID 3
.Os
.Sh NAME
.Nm gethostid ,
.Nm sethostid
.Nd get/set unique identifier of current host
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In unistd.h
.Ft long
.Fn gethostid void
.Ft void
.Fn sethostid "long hostid"
.Sh DESCRIPTION
The
.Fn sethostid
function
establishes a 32-bit identifier for the
current processor that is intended to be unique among all
UNIX systems in existence.
This is normally a DARPA Internet
address for the local machine.
This call is allowed only to the
super-user and is normally performed at boot time.
.Pp
The
.Fn gethostid
function
returns the 32-bit identifier for the current processor.
.Pp
This function has been deprecated.
The hostid should be set or retrieved by use of
.Xr sysctl 3 .
.Sh SEE ALSO
.Xr gethostname 3 ,
.Xr sysctl 3 ,
.Xr sysctl 8
.Sh HISTORY
The
.Fn gethostid
and
.Fn sethostid
syscalls appeared in
.Bx 4.2
and were dropped in
.Bx 4.4 .
.Sh BUGS
32 bits for the identifier is too small.