1.\" $NetBSD: gethostid.3,v 1.12 2003/08/07 16:42:39 agc 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. Neither the name of the University nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.\" @(#)gethostid.3 8.1 (Berkeley) 6/2/93 31.\" 32.Dd June 2, 1993 33.Dt GETHOSTID 3 34.Os 35.Sh NAME 36.Nm gethostid , 37.Nm sethostid 38.Nd get/set unique identifier of current host 39.Sh LIBRARY 40.Lb libc 41.Sh SYNOPSIS 42.In unistd.h 43.Ft long 44.Fn gethostid void 45.Ft int 46.Fn sethostid "long hostid" 47.Sh DESCRIPTION 48.Fn sethostid 49establishes a 32-bit identifier for the current processor that is 50intended to be unique among all 51.Ux 52systems in existence. 53This is normally a DARPA Internet address for the local machine. 54This call is allowed only to the super-user and is normally performed 55at boot time. 56.Pp 57.Fn gethostid 58returns the 32-bit identifier for the current processor. 59.Pp 60This function has been deprecated. 61The hostid should be set or retrieved by use of 62.Xr sysctl 3 . 63.Sh SEE ALSO 64.Xr gethostname 3 , 65.Xr sysctl 3 , 66.Xr sysctl 8 67.Sh HISTORY 68The 69.Fn gethostid 70and 71.Fn sethostid 72syscalls appeared in 73.Bx 4.2 74and were dropped in 75.Bx 4.4 . 76.Sh BUGS 7732 bits for the identifier is too small. 78