rc.initdiskless revision 95280
1# Copyright (c) 1999 Matt Dillion 2# All rights reserved. 3# 4# Redistribution and use in source and binary forms, with or without 5# modification, are permitted provided that the following conditions 6# are met: 7# 1. Redistributions of source code must retain the above copyright 8# notice, this list of conditions and the following disclaimer. 9# 2. Redistributions in binary form must reproduce the above copyright 10# notice, this list of conditions and the following disclaimer in the 11# documentation and/or other materials provided with the distribution. 12# 13# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23# SUCH DAMAGE. 24# 25# $FreeBSD: head/etc/rc.initdiskless 95280 2002-04-22 21:42:18Z obrien $ 26# 27 28# 29# /etc/rc.diskless1 - general BOOTP startup 30# 31# BOOTP has mounted / for us. Assume a read-only mount. We must then 32# - figure out our IP by querying the interface 33# - mount /etc as an MFS 34# - populate /etc from /conf/default version 35# - override files in /etc with files from /conf/*/etc where 36# '*' is default, netmask of client, ip-address of client 37# 38# The operator is in charge of setting /conf/*/etc/* things as appropriate. 39# Typically rc.conf and fstab need to be changed, but possibly also other 40# files such as inetd.conf etc. 41 42# chkerr: 43# 44# Routine to check for error 45# 46# checks error code and drops into shell on failure. 47# if shell exits, terminates script as well as /etc/rc. 48# 49chkerr() { 50 case $1 in 51 0) 52 ;; 53 *) 54 echo "$2 failed: dropping into /bin/sh" 55 /bin/sh 56 # RESUME 57 ;; 58 esac 59} 60 61mount_md() { 62 /sbin/mdconfig -a -t malloc -s $1 -u $3 63 /sbin/disklabel -r -w md$3 auto 64 /sbin/newfs /dev/md$3c 65 /sbin/mount /dev/md$3c $2 66} 67 68# DEBUGGING 69# 70# set -v 71 72# Figure out our interface and IP. 73# 74bootp_ifc="" 75bootp_ipa="" 76bootp_ipbca="" 77iflist=`ifconfig -l` 78for i in ${iflist} ; do 79 set `ifconfig ${i}` 80 while [ $# -ge 1 ] ; do 81 if [ "${bootp_ifc}" = "" -a "$1" = "inet" ] ; then 82 bootp_ifc=${i} ; bootp_ipa=${2} ; shift 83 fi 84 if [ "${bootp_ipbca}" = "" -a "$1" = "broadcast" ] ; then 85 bootp_ipbca=$2; shift 86 fi 87 shift 88 done 89 if [ "${bootp_ifc}" != "" ] ; then 90 break 91 fi 92done 93echo "Interface ${bootp_ifc} IP-Address ${bootp_ipa} Broadcast ${bootp_ipbca}" 94 95if [ -z "`hostname -s`" ]; then 96 hostname=`kenv dhcp.host-name` 97 hostname $hostname 98 echo "Hostname is $hostname" 99fi 100 101if [ -d /conf/default/etc ]; then 102 mount_md 4096 /etc 0 103 chkerr $? "MFS mount on /etc" 104 /bin/chmod 755 /etc 105 106 /bin/cp -Rp /conf/default/etc/* /etc 107 chkerr $? "cp /conf/default/etc to /etc MFS" 108fi 109 110# Allow for override files to replace files in /etc. Use /conf/*/etc to find 111# the override files. First choice is default files that # always override, 112# then files that from the directory that matches the client's broadcast 113# address, finally followed by overrides that match the client's IP address. 114# 115# This way we have some flexibility to handle clusters of machines on 116# separate subnets. 117 118for i in ${bootp_ipbca} ${bootp_ipa} ${hostname} ; do 119 if [ -d /conf/${i}/etc ]; then 120 cp -Rp /conf/${i}/etc/* /etc 121 fi 122done 123 124# 125# if the info is available via dhcp/kenv 126# build the resolv.conf 127# 128if [ ! -e /etc/resolv.conf ]; then 129 echo domain `kenv dhcp.domain-name` > /etc/resolv.conf 130 131 set `kenv dhcp.domain-name-servers` 132 for ns in `IFS=','; echo $*`; do 133 echo nameserver $ns >> /etc/resolv.conf; 134 done 135fi 136 137# Tell /etc/rc to run the specified script after it does its mounts but 138# before it does anything else. 139# 140# This script is responsible for setting up the diskless mount environment. 141# This can be overriden by /conf/ME/rc.conf.local if, for example, you do not 142# want to run the standard system /etc/rc.diskless2 143 144diskless_mount="/etc/rc.diskless2" 145