e3e421bacf
apply an addition from Andrew Thompson <thompsa> for filtering out the special "Nil" UUID (all zeros) which would be a useless host UUID.
103 lines
2.8 KiB
Bash
103 lines
2.8 KiB
Bash
#!/bin/sh
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#
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# Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# $FreeBSD$
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#
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# PROVIDE: hostid
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# REQUIRE: root
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# BEFORE: mountcritlocal
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# KEYWORD: nojail
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. /etc/rc.subr
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name="hostid"
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start_cmd="hostid_start"
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stop_cmd=":"
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reset_cmd="hostid_reset"
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extra_commands="reset"
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rcvar="hostid_enable"
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hostid_set()
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{
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uuid=$1
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# Generate hostid based on hostuuid - take first four bytes from md5(uuid).
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id=`echo -n $uuid | md5`
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id="0x${id%????????????????????????}"
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# Set both kern.hostuuid and kern.hostid.
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echo "Setting hostuuid: ${uuid}."
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${SYSCTL_W} kern.hostuuid="${uuid}" >/dev/null
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echo "Setting hostid: ${id}."
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${SYSCTL_W} kern.hostid=${id} >/dev/null
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}
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hostid_hardware()
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{
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uuid=`kenv smbios.system.uuid 2>/dev/null`
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uuid=`csh -c 'echo -n ${*:al}' "${uuid}"`
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x="[0-9a-f]"
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y=$x$x$x$x
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z="0000"
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case "${uuid}" in
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$z$z-$z-$z-$z-$z$z$z)
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# Filter the special "Nil" UUID
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;;
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$y$y-$y-$y-$y-$y$y$y)
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echo "${uuid}"
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;;
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esac
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}
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hostid_reset()
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{
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# First look for UUID in hardware.
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uuid=`hostid_hardware`
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if [ -z ${uuid} ]; then
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# If not found, fall back to software-generated UUID.
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uuid=`uuidgen`
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fi
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# Store newly generated UUID in ${hostid_file}.
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echo $uuid > ${hostid_file}
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if [ $? -ne 0 ]; then
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warn "could not store hostuuid in ${hostid_file}."
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fi
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hostid_set $uuid
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}
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hostid_start()
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{
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# If ${hostid_file} already exists, we take UUID from there.
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if [ -r ${hostid_file} ]; then
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hostid_set `cat ${hostid_file}`
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else
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# No hostid file, generate UUID.
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hostid_reset
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fi
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}
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load_rc_config $name
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run_rc_command "$1"
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