diff options
Diffstat (limited to 'etc/rc.initdiskless')
| -rw-r--r-- | etc/rc.initdiskless | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/etc/rc.initdiskless b/etc/rc.initdiskless new file mode 100644 index 0000000..6722365 --- /dev/null +++ b/etc/rc.initdiskless @@ -0,0 +1,142 @@ +#!/bin/sh +# +# Copyright (c) 1999 Matt Dillion +# 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 AUTHOR 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 AUTHOR 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: initdiskless +# KEYWORD: FreeBSD + +dlv=`/sbin/sysctl -n vfs.nfs.diskless_valid 2> /dev/null` +[ ${dlv:=0} -eq 0 ] && exit 0 + +# +# BOOTP has mounted / for us. Assume a read-only mount. We must then +# - figure out our IP by querying the interface +# - mount /etc as an MFS +# - populate /etc from /conf/default version +# - override files in /etc with files from /conf/*/etc where +# '*' is default, netmask of client, ip-address of client +# +# The operator is in charge of setting /conf/*/etc/* things as appropriate. +# Typically rc.conf and fstab need to be changed, but possibly also other +# files such as inetd.conf etc. + +# chkerr: +# +# Routine to check for error +# +# checks error code and drops into shell on failure. +# if shell exits, terminates script as well as /etc/rc. +# +chkerr() +{ + case $1 in + 0) + ;; + *) + echo "$2 failed: dropping into /bin/sh" + /bin/sh + # RESUME + ;; + esac +} + +mount_md() +{ + /sbin/mdmfs -i 4096 -s $1 -M md$3 $2 +} + +# DEBUGGING +# +# set -v + +# Figure out our interface and IP. +# +bootp_ifc="" +bootp_ipa="" +bootp_ipbca="" +iflist=`ifconfig -l` +for i in ${iflist} ; do + set `ifconfig ${i}` + while [ $# -ge 1 ] ; do + if [ "${bootp_ifc}" = "" -a "$1" = "inet" ] ; then + bootp_ifc=${i} ; bootp_ipa=${2} ; shift + fi + if [ "${bootp_ipbca}" = "" -a "$1" = "broadcast" ] ; then + bootp_ipbca=$2; shift + fi + shift + done + if [ "${bootp_ifc}" != "" ] ; then + break + fi +done +echo "Interface ${bootp_ifc} IP-Address ${bootp_ipa} Broadcast ${bootp_ipbca}" + +if [ -z "`hostname -s`" ]; then + hostname=`kenv dhcp.host-name` + hostname $hostname + echo "Hostname is $hostname" +fi + +if [ -d /conf/default/etc ]; then + mount_md 4096 /etc 0 + chkerr $? "MFS mount on /etc" + /bin/chmod 755 /etc + + /bin/cp -Rp /conf/default/etc/* /etc + chkerr $? "cp /conf/default/etc to /etc MFS" +fi + +# Allow for override files to replace files in /etc. Use /conf/*/etc to find +# the override files. First choice is default files that # always override, +# then files that from the directory that matches the client's broadcast +# address, finally followed by overrides that match the client's IP address. +# +# This way we have some flexibility to handle clusters of machines on +# separate subnets. + +for i in ${bootp_ipbca} ${bootp_ipa} ${hostname} ; do + if [ -d /conf/${i}/etc ]; then + cp -Rp /conf/${i}/etc/* /etc + fi +done + +# +# if the info is available via dhcp/kenv +# build the resolv.conf +# +if [ ! -e /etc/resolv.conf ]; then + echo domain `kenv dhcp.domain-name` > /etc/resolv.conf + + set `kenv dhcp.domain-name-servers` + for ns in `IFS=','; echo $*`; do + echo nameserver $ns >> /etc/resolv.conf; + done +fi + +exit 2 # Tell /etc/rc to re-source rc.conf |
