freebsd-dev/lib/libc/compat-43/gethostid.3

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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
.Fn Sethostid
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
.Fn Gethostid
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 BUGS
32 bits for the identifier is too small.
.Sh HISTORY
The
.Fn gethostid
and
.Fn sethostid
syscalls appeared in
.Bx 4.2
and were dropped in
.Bx 4.4 .