hostid revision 220153
1#!/bin/sh 2# 3# Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org> 4# All rights reserved. 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: head/etc/rc.d/hostid 220153 2011-03-30 01:19:00Z emaste $ 28# 29 30# PROVIDE: hostid 31# REQUIRE: sysctl 32# KEYWORD: nojail 33 34. /etc/rc.subr 35 36name="hostid" 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 check_startmsgs && echo "Setting hostuuid: ${uuid}." 53 ${SYSCTL} kern.hostuuid="${uuid}" >/dev/null 54 check_startmsgs && echo "Setting hostid: ${id}." 55 ${SYSCTL} kern.hostid=${id} >/dev/null 56} 57 58hostid_hardware() 59{ 60 uuid=`kenv -q smbios.system.uuid` 61 x="[0-9a-f]" 62 y=$x$x$x$x 63 case "${uuid}" in 64 $y$y-$y-$y-$y-$y$y$y) 65 echo "${uuid}" 66 ;; 67 esac 68} 69 70hostid_generate() 71{ 72 # First look for UUID in hardware. 73 uuid=`hostid_hardware` 74 if [ -z ${uuid} ]; then 75 # If not found, fall back to software-generated UUID. 76 uuid=`uuidgen` 77 fi 78 hostid_set $uuid 79} 80 81hostid_reset() 82{ 83 hostid_generate 84 # Store newly generated UUID in ${hostid_file}. 85 echo $uuid > ${hostid_file} 86 if [ $? -ne 0 ]; then 87 warn "could not store hostuuid in ${hostid_file}." 88 fi 89} 90 91hostid_start() 92{ 93 # If ${hostid_file} already exists, we take UUID from there. 94 if [ -r ${hostid_file} ]; then 95 hostid_set `cat ${hostid_file}` 96 else 97 # No hostid file, generate UUID. 98 hostid_generate 99 fi 100} 101 102load_rc_config $name 103run_rc_command "$1" 104