81 lines
2.6 KiB
Groff
81 lines
2.6 KiB
Groff
.\" Copyright (c) 1983, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)gethostid.3 8.1 (Berkeley) 6/2/93
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.\" $FreeBSD$
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.\"
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.Dd June 2, 1993
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.Dt GETHOSTID 3
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.Os
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.Sh NAME
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.Nm gethostid ,
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.Nm sethostid
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.Nd get/set unique identifier of current host
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In unistd.h
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.Ft long
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.Fn gethostid void
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.Ft void
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.Fn sethostid "long hostid"
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.Sh DESCRIPTION
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The
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.Fn sethostid
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function
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establishes a 32-bit identifier for the
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current processor that is intended to be unique among all
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UNIX systems in existence.
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This is normally a DARPA Internet
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address for the local machine.
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This call is allowed only to the
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super-user and is normally performed at boot time.
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.Pp
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The
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.Fn gethostid
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function
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returns the 32-bit identifier for the current processor.
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.Pp
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This function has been deprecated.
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The hostid should be set or retrieved by use of
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.Xr sysctl 3 .
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.Sh SEE ALSO
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.Xr gethostname 3 ,
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.Xr sysctl 3 ,
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.Xr sysctl 8
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.Sh HISTORY
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The
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.Fn gethostid
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and
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.Fn sethostid
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syscalls appeared in
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.Bx 4.2
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and were dropped in
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.Bx 4.4 .
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.Sh BUGS
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32 bits for the identifier is too small.
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