rc.initdiskless revision 100280
1#!/bin/sh 2# 3# Copyright (c) 1999 Matt Dillion 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 AUTHOR 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 AUTHOR 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.initdiskless 100280 2002-07-18 05:00:17Z gordon $ 28# 29 30# PROVIDE: initdiskless 31# KEYWORD: FreeBSD 32 33dlv=`/sbin/sysctl -n vfs.nfs.diskless_valid 2> /dev/null` 34[ ${dlv:=0} -eq 0 ] && exit 0 35 36# 37# BOOTP has mounted / for us. Assume a read-only mount. We must then 38# - figure out our IP by querying the interface 39# - mount /etc as an MFS 40# - populate /etc from /conf/default version 41# - override files in /etc with files from /conf/*/etc where 42# '*' is default, netmask of client, ip-address of client 43# 44# The operator is in charge of setting /conf/*/etc/* things as appropriate. 45# Typically rc.conf and fstab need to be changed, but possibly also other 46# files such as inetd.conf etc. 47 48# chkerr: 49# 50# Routine to check for error 51# 52# checks error code and drops into shell on failure. 53# if shell exits, terminates script as well as /etc/rc. 54# 55chkerr() 56{ 57 case $1 in 58 0) 59 ;; 60 *) 61 echo "$2 failed: dropping into /bin/sh" 62 /bin/sh 63 # RESUME 64 ;; 65 esac 66} 67 68mount_md() 69{ 70 /sbin/mdconfig -a -t malloc -s $1 -u $3 71 /sbin/disklabel -r -w md$3 auto 72 /sbin/newfs /dev/md$3c 73 /sbin/mount /dev/md$3c $2 74} 75 76# DEBUGGING 77# 78# set -v 79 80# Figure out our interface and IP. 81# 82bootp_ifc="" 83bootp_ipa="" 84bootp_ipbca="" 85iflist=`ifconfig -l` 86for i in ${iflist} ; do 87 set `ifconfig ${i}` 88 while [ $# -ge 1 ] ; do 89 if [ "${bootp_ifc}" = "" -a "$1" = "inet" ] ; then 90 bootp_ifc=${i} ; bootp_ipa=${2} ; shift 91 fi 92 if [ "${bootp_ipbca}" = "" -a "$1" = "broadcast" ] ; then 93 bootp_ipbca=$2; shift 94 fi 95 shift 96 done 97 if [ "${bootp_ifc}" != "" ] ; then 98 break 99 fi 100done 101echo "Interface ${bootp_ifc} IP-Address ${bootp_ipa} Broadcast ${bootp_ipbca}" 102 103if [ -z "`hostname -s`" ]; then 104 hostname=`kenv dhcp.host-name` 105 hostname $hostname 106 echo "Hostname is $hostname" 107fi 108 109if [ -d /conf/default/etc ]; then 110 mount_md 4096 /etc 0 111 chkerr $? "MFS mount on /etc" 112 /bin/chmod 755 /etc 113 114 /bin/cp -Rp /conf/default/etc/* /etc 115 chkerr $? "cp /conf/default/etc to /etc MFS" 116fi 117 118# Allow for override files to replace files in /etc. Use /conf/*/etc to find 119# the override files. First choice is default files that # always override, 120# then files that from the directory that matches the client's broadcast 121# address, finally followed by overrides that match the client's IP address. 122# 123# This way we have some flexibility to handle clusters of machines on 124# separate subnets. 125 126for i in ${bootp_ipbca} ${bootp_ipa} ${hostname} ; do 127 if [ -d /conf/${i}/etc ]; then 128 cp -Rp /conf/${i}/etc/* /etc 129 fi 130done 131 132# 133# if the info is available via dhcp/kenv 134# build the resolv.conf 135# 136if [ ! -e /etc/resolv.conf ]; then 137 echo domain `kenv dhcp.domain-name` > /etc/resolv.conf 138 139 set `kenv dhcp.domain-name-servers` 140 for ns in `IFS=','; echo $*`; do 141 echo nameserver $ns >> /etc/resolv.conf; 142 done 143fi 144