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# 28 29# PROVIDE: hostid 30# REQUIRE: sysctl 31# KEYWORD: nojail 32 33. /etc/rc.subr 34 35name="hostid" 36desc="Generate a unique host ID" 37start_cmd="hostid_start" 38stop_cmd=":" 39reset_cmd="hostid_reset" 40extra_commands="reset" 41rcvar="hostid_enable" 42 43hostid_set() 44{ 45 uuid=$1 46 # Generate hostid based on hostuuid - take first four bytes from md5(uuid). 47 id=`echo -n $uuid | /sbin/md5` 48 id="0x${id%????????????????????????}" 49 50 # Set both kern.hostuuid and kern.hostid. 51 # 52 startmsg "Setting hostuuid: ${uuid}." 53 ${SYSCTL} kern.hostuuid="${uuid}" >/dev/null 54 startmsg "Setting hostid: ${id}." 55 ${SYSCTL} kern.hostid=${id} >/dev/null 56} 57 58valid_hostid() 59{ 60 uuid=$1 61 62 x="[0-9a-f]" 63 y=$x$x$x$x 64 65 # Check against a blacklist before 66 # accepting the UUID. 67 case "${uuid}" in 68 00000000-0000-0000-0000-000000000000) 69 ;; 70 00020003-0004-0005-0006-000700080009) 71 ;; 72 03000200-0400-0500-0006-000700080009) 73 ;; 74 07090201-0103-0301-0807-060504030201) 75 ;; 76 11111111-1111-1111-1111-111111111111) 77 ;; 78 11111111-2222-3333-4444-555555555555) 79 ;; 80 4c4c4544-0000-2010-8020-80c04f202020) 81 ;; 82 58585858-5858-5858-5858-585858585858) 83 ;; 84 890e2d14-cacd-45d1-ae66-bc80e8bfeb0f) 85 ;; 86 8e275844-178f-44a8-aceb-a7d7e5178c63) 87 ;; 88 dc698397-fa54-4cf2-82c8-b1b5307a6a7f) 89 ;; 90 fefefefe-fefe-fefe-fefe-fefefefefefe) 91 ;; 92 *-ffff-ffff-ffff-ffffffffffff) 93 ;; 94 $y$y-$y-$y-$y-$y$y$y) 95 return 0 96 ;; 97 esac 98 99 return 1 100} 101 102hostid_hardware() 103{ 104 uuid=`kenv -q smbios.system.uuid` 105 106 if valid_hostid $uuid; then 107 echo "${uuid}" 108 elif [ "$uuid" ]; then 109 echo "INVALID" 110 fi 111} 112 113hostid_generate() 114{ 115 # First look for UUID in hardware. 116 uuid=`hostid_hardware` 117 118 # Warn about invalid UUIDs 119 if [ "${uuid}" = "INVALID" ]; then 120 warn "hostid: unable to figure out a UUID from DMI data, generating a new one" 121 sleep 2 122 uuid="" 123 fi 124 125 # Generate a random UUID if invalid or not found 126 if [ -z "${uuid}" ]; then 127 # If not found, fall back to software-generated UUID. 128 uuid=`uuidgen ${hostid_uuidgen_flags}` 129 fi 130 hostid_set $uuid 131} 132 133hostid_reset() 134{ 135 hostid_generate 136 # Store newly generated UUID in ${hostid_file}. 137 echo $uuid > ${hostid_file} 138 if [ $? -ne 0 ]; then 139 warn "could not store hostuuid in ${hostid_file}." 140 fi 141} 142 143hostid_start() 144{ 145 # If ${hostid_file} already exists, we take UUID from there. 146 if [ -r ${hostid_file} ]; then 147 read saved_hostid < ${hostid_file} 148 if valid_hostid ${saved_hostid}; then 149 hostid_set ${saved_hostid} 150 exit 0 151 fi 152 fi 153 154 # No hostid file, generate UUID. 155 hostid_generate 156} 157 158load_rc_config $name 159run_rc_command "$1" 160