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