freebsd-dev/etc/rc.d/hostid
Doug Barton 70d4ef1ea1 In regards to the "Starting foo:" type messages at boot time, create and
employ a more generic solution, and use it in the individual rc.d scripts
that also have an $rc_quiet test:

1. Add check_startmsgs() to rc.subr.
2. In the rc.d scripts that use rc_quiet (and rc.subr) substitute
variations of [ -z "$rc_quiet" ] with check_startmsgs
3. In savecore add a trailing '.' to the end of the message to make it
more consistent with other scripts.
4. In newsyslog remove a : before the terminal '.' since we do not expect
there to be anything printed out in between to make it more consistent.
5. In the following scripts change "quotes" to 'quotes' where no variables
exist in the message: savecore pf newsyslog
6. In the following scripts substitute if/then/fi for the simpler (and
more consistent) check_startmsgs &&: faith stf
7. In the following scripts separate the "Starting foo:" from the terminal
'.' to make them more consistent: moused hostname pf
8. In nfsclient move the message to its own line to avoid a style bug
9. In pf rc_quiet does not apply to the _stop method, so remove the
test there.
10. In motd add 'quotes' around the terminal '.' for consistency
2009-10-10 22:17:03 +00:00

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