compat-43/FreeBSD/gethostid.3

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  32 .\"     @(#)gethostid.3 8.1 (Berkeley) 6/2/93
  33 .\" $FreeBSD: src/lib/libc/compat-43/gethostid.3,v 1.11 2002/12/18 12:45:08 ru Exp $
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  35 .Dd June 2, 1993
  36 .Dt GETHOSTID 3
  37 .Os
  38 .Sh NAME
  39 .Nm gethostid ,
  40 .Nm sethostid
  41 .Nd get/set unique identifier of current host
  42 .Sh LIBRARY
  43 .Lb libc
  44 .Sh SYNOPSIS
  45 .In unistd.h
  46 .Ft long
  47 .Fn gethostid void
  48 .Ft void
  49 .Fn sethostid "long hostid"
  50 .Sh DESCRIPTION
  51 The
  52 .Fn sethostid
  53 function
  54 establishes a 32-bit identifier for the
  55 current processor that is intended to be unique among all
  56 UNIX systems in existence.  This is normally a DARPA Internet
  57 address for the local machine.  This call is allowed only to the
  58 super-user and is normally performed at boot time.
  59 .Pp
  60 The
  61 .Fn gethostid
  62 function
  63 returns the 32-bit identifier for the current processor.
  64 .Pp
  65 This function has been deprecated.
  66 The hostid should be set or retrieved by use of
  67 .Xr sysctl 3 .
  68 .Sh SEE ALSO
  69 .Xr gethostname 3 ,
  70 .Xr sysctl 3 ,
  71 .Xr sysctl 8
  72 .Sh BUGS
  73 32 bits for the identifier is too small.
  74 .Sh HISTORY
  75 The
  76 .Fn gethostid
  77 and
  78 .Fn sethostid
  79 syscalls appeared in
  80 .Bx 4.2
  81 and were dropped in
  82 .Bx 4.4 .