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 1.12 2004/07/02 23:52:09 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.
  57 This is normally a DARPA Internet
  58 address for the local machine.
  59 This call is allowed only to the
  60 super-user and is normally performed at boot time.
  61 .Pp
  62 The
  63 .Fn gethostid
  64 function
  65 returns the 32-bit identifier for the current processor.
  66 .Pp
  67 This function has been deprecated.
  68 The hostid should be set or retrieved by use of
  69 .Xr sysctl 3 .
  70 .Sh SEE ALSO
  71 .Xr gethostname 3 ,
  72 .Xr sysctl 3 ,
  73 .Xr sysctl 8
  74 .Sh BUGS
  75 32 bits for the identifier is too small.
  76 .Sh HISTORY
  77 The
  78 .Fn gethostid
  79 and
  80 .Fn sethostid
  81 syscalls appeared in
  82 .Bx 4.2
  83 and were dropped in
  84 .Bx 4.4 .