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. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" $OpenBSD: gethostid.3,v 1.8 2000/04/18 02:31:31 aaron Exp $ 33.\" 34.Dd June 2, 1993 35.Dt GETHOSTID 3 36.Os 37.Sh NAME 38.Nm gethostid , 39.Nm sethostid 40.Nd get/set unique identifier of current host 41.Sh SYNOPSIS 42.Fd #include <unistd.h> 43.Ft long 44.Fn gethostid void 45.Ft int 46.Fn sethostid "long hostid" 47.Sh DESCRIPTION 48The 49.Fn sethostid 50function establishes a 32-bit identifier for the 51current processor that is intended to be unique among all 52UNIX systems in existence. 53This is normally a DARPA Internet address for the local machine. 54This call is allowed only to the 55superuser and is normally performed at 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 BUGS 6832 bits for the identifier is too small. 69.Sh HISTORY 70The 71.Fn gethostid 72and 73.Fn sethostid 74syscalls appeared in 75.Bx 4.2 76and were dropped in 77.Bx 4.4 . 78