compat-43/gethostid.3

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  28 .\"     @(#)gethostid.3 8.1 (Berkeley) 6/2/93
  29 .\" $FreeBSD: src/lib/libc/compat-43/gethostid.3,v 1.14 2007/01/09 00:27:49 imp Exp $
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  31 .Dd June 2, 1993
  32 .Dt GETHOSTID 3
  33 .Os
  34 .Sh NAME
  35 .Nm gethostid ,
  36 .Nm sethostid
  37 .Nd get/set unique identifier of current host
  38 .Sh LIBRARY
  39 .Lb libc
  40 .Sh SYNOPSIS
  41 .In unistd.h
  42 .Ft long
  43 .Fn gethostid void
  44 .Ft void
  45 .Fn sethostid "long hostid"
  46 .Sh DESCRIPTION
  47 The
  48 .Fn sethostid
  49 function
  50 establishes a 32-bit identifier for the current processor.
  51 The id, intended to be unique among all UNIX systems in existence,
  52 is normally a DARPA Internet address for the local machine.
  53 This call is allowed only to the
  54 super-user and is normally performed at boot time.
  55 .Pp
  56 The
  57 .Fn gethostid
  58 function
  59 returns the 32-bit identifier for the current processor.
  60 .Pp
  61 This function has been deprecated.
  62 The hostid should be set or retrieved by use of
  63 .Xr sysctl 3 .
  64 .Sh SEE ALSO
  65 .Xr gethostname 3 ,
  66 .Xr sysctl 3 ,
  67 .Xr sysctl 8
  68 .Sh HISTORY
  69 The
  70 .Fn gethostid
  71 and
  72 .Fn sethostid
  73 syscalls appeared in
  74 .Bx 4.2
  75 and were dropped in
  76 .Bx 4.4 .
  77 .Sh BUGS
  78 32 bits for the identifier is too small.