1#!/bin/sh 2# 3# Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org> 4# Copyright (c) 2015 Xin LI <delphij@FreeBSD.org> 5# 6# Redistribution and use in source and binary forms, with or without 7# modification, are permitted provided that the following conditions 8# are met: 9# 1. Redistributions of source code must retain the above copyright 10# notice, this list of conditions and the following disclaimer. 11# 2. Redistributions in binary form must reproduce the above copyright 12# notice, this list of conditions and the following disclaimer in the 13# documentation and/or other materials provided with the distribution. 14# 15# THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 16# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 19# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25# SUCH DAMAGE. 26# 27# $FreeBSD$ 28# 29 30# PROVIDE: hostid 31# REQUIRE: sysctl 32# KEYWORD: nojail 33 34. /etc/rc.subr 35 36name="hostid" 37desc="Generate a unique host ID" 38start_cmd="hostid_start" 39stop_cmd=":" 40reset_cmd="hostid_reset" 41extra_commands="reset" 42rcvar="hostid_enable" 43 44hostid_set() 45{ 46 uuid=$1 47 # Generate hostid based on hostuuid - take first four bytes from md5(uuid). 48 id=`echo -n $uuid | /sbin/md5` 49 id="0x${id%????????????????????????}" 50 51 # Set both kern.hostuuid and kern.hostid. 52 # 53 startmsg "Setting hostuuid: ${uuid}." 54 ${SYSCTL} kern.hostuuid="${uuid}" >/dev/null 55 startmsg "Setting hostid: ${id}." 56 ${SYSCTL} kern.hostid=${id} >/dev/null 57} 58 59valid_hostid() 60{ 61 uuid=$1 62 63 x="[0-9a-f]" 64 y=$x$x$x$x 65 66 # Check against a blacklist before 67 # accepting the UUID. 68 case "${uuid}" in 69 00000000-0000-0000-0000-000000000000) 70 ;; 71 00020003-0004-0005-0006-000700080009) 72 ;; 73 03000200-0400-0500-0006-000700080009) 74 ;; 75 07090201-0103-0301-0807-060504030201) 76 ;; 77 11111111-1111-1111-1111-111111111111) 78 ;; 79 11111111-2222-3333-4444-555555555555) 80 ;; 81 4c4c4544-0000-2010-8020-80c04f202020) 82 ;; 83 58585858-5858-5858-5858-585858585858) 84 ;; 85 890e2d14-cacd-45d1-ae66-bc80e8bfeb0f) 86 ;; 87 8e275844-178f-44a8-aceb-a7d7e5178c63) 88 ;; 89 dc698397-fa54-4cf2-82c8-b1b5307a6a7f) 90 ;; 91 fefefefe-fefe-fefe-fefe-fefefefefefe) 92 ;; 93 *-ffff-ffff-ffff-ffffffffffff) 94 ;; 95 $y$y-$y-$y-$y-$y$y$y) 96 return 0 97 ;; 98 esac 99 100 return 1 101} 102 103hostid_hardware() 104{ 105 uuid=`kenv -q smbios.system.uuid` 106 107 if valid_hostid $uuid; then 108 echo "${uuid}" 109 fi 110} 111 112hostid_generate() 113{ 114 # First look for UUID in hardware. 115 uuid=`hostid_hardware` 116 if [ -z "${uuid}" ]; then 117 warn "hostid: unable to figure out a UUID from DMI data, generating a new one" 118 sleep 2 119 # If not found, fall back to software-generated UUID. 120 uuid=`uuidgen` 121 fi 122 hostid_set $uuid 123} 124 125hostid_reset() 126{ 127 hostid_generate 128 # Store newly generated UUID in ${hostid_file}. 129 echo $uuid > ${hostid_file} 130 if [ $? -ne 0 ]; then 131 warn "could not store hostuuid in ${hostid_file}." 132 fi 133} 134 135hostid_start() 136{ 137 # If ${hostid_file} already exists, we take UUID from there. 138 if [ -r ${hostid_file} ]; then 139 read saved_hostid < ${hostid_file} 140 if valid_hostid ${saved_hostid}; then 141 hostid_set `cat ${hostid_file}` 142 exit 0 143 fi 144 fi 145 146 # No hostid file, generate UUID. 147 hostid_generate 148} 149 150load_rc_config $name 151run_rc_command "$1" 152