diff options
author | pjd <pjd@FreeBSD.org> | 2007-04-09 19:21:27 +0000 |
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committer | pjd <pjd@FreeBSD.org> | 2007-04-09 19:21:27 +0000 |
commit | 8222e16eeafd3f727c4a849150f58cdd8868e6ec (patch) | |
tree | e397600a76a7e762254b43934f28d91285dee1e0 /etc/rc.d/hostid | |
parent | d74643dd36f6687fce16dbff6031cfe3a1c0e3f6 (diff) | |
download | FreeBSD-src-8222e16eeafd3f727c4a849150f58cdd8868e6ec.zip FreeBSD-src-8222e16eeafd3f727c4a849150f58cdd8868e6ec.tar.gz |
Add rc.d/hostid script (turned on by default) which on first boot generates
UUID and stores it in /etc/hostid ($hostid_file) as well as sets kern.hostuuid
and kern.hostid sysctls on every boot.
Hostid can be reset using '/etc/rc.d/hostid reset' command.
Hostid generation and setting can be turned off by setting variable
hostid_enable to "NO" in /etc/rc.conf.
Reviewed by: mlaier, rink, brooks, rwatson
Diffstat (limited to 'etc/rc.d/hostid')
-rw-r--r-- | etc/rc.d/hostid | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/etc/rc.d/hostid b/etc/rc.d/hostid new file mode 100644 index 0000000..b380180 --- /dev/null +++ b/etc/rc.d/hostid @@ -0,0 +1,80 @@ +#!/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 +# REQUIRE: root +# BEFORE: mountcritlocal +# 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 $uuid | md5` + id="0x${id%????????????????????????}" + # Set both kern.hostuuid and kern.hostid. + echo "Setting hostuuid: ${uuid}." + ${SYSCTL_W} kern.hostuuid="${uuid}" >/dev/null + echo "Setting hostid: ${id}." + ${SYSCTL_W} kern.hostid=${id} >/dev/null +} + +hostid_reset() +{ + uuid=`uuidgen` + # 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_set $uuid +} + +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_reset + fi +} + +load_rc_config $name +run_rc_command "$1" |