rc.initdiskless revision 88496 
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 88496 2001-12-26 17:00:55Z rwatson $
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# WARNING: i thing you should not change /etc/rc or strange things could
39# happen.
40#
41# The operator is in charge of setting /conf/*/etc/* things as appropriate.
42# Typically rc.conf and fstab need to be changed, but possibly
43# also other files such as inetd.conf etc.
44
45# chkerr:
46#
47# Routine to check for error
48#
49#	checks error code and drops into shell on failure.
50#	if shell exits, terminates script as well as /etc/rc.
51#
52chkerr() {
53	case $1 in
54	0)
55		;;
56	*)
57		echo "$2 failed: dropping into /bin/sh"
58		/bin/sh
59		# RESUME
60		;;
61	esac
62}
63
64mount_md() {
65	/sbin/mdconfig -a -t malloc -s $1 -u $3
66	/sbin/disklabel -r -w md$3 auto
67	/sbin/newfs /dev/md$3c
68	/sbin/mount /dev/md$3c $2
69}
70
71# DEBUGGING
72#
73# set -v
74
75# Figure out our interface and IP.
76#
77bootp_ifc=""
78bootp_ipa=""
79bootp_ipbca=""
80iflist=`ifconfig -l`
81for i in ${iflist} ; do
82    set `ifconfig ${i}`
83    while [ $# -ge 1 ] ; do
84        if [ "${bootp_ifc}" = "" -a "$1" = "inet" ] ; then
85            bootp_ifc=${i} ; bootp_ipa=${2} ; shift
86        fi
87        if [ "${bootp_ipbca}" = "" -a "$1" = "broadcast" ] ; then
88            bootp_ipbca=$2; shift
89        fi
90        shift
91    done
92    if [ "${bootp_ifc}" != "" ] ; then
93        break
94    fi
95done
96echo "Interface ${bootp_ifc} IP-Address ${bootp_ipa} Broadcast ${bootp_ipbca}"
97
98
99mount_md 4096 /etc 0
100chkerr $? "MFS mount on /etc"
101/bin/chmod 755 /etc
102
103/bin/cp -Rp /conf/default/etc/* /etc
104chkerr $? "cp /conf/default/etc to /etc MFS"
105
106# Allow for override files to replace files in /etc.  Use /conf/*/etc
107# to find the override files.  First choice is default files that
108# always override, then files that from the directory that matches the
109# client's broadcast address, finally followed by overrides that match
110# the client's IP address.
111#
112# This way we have some flexibility to handle clusters of machines
113# on separate subnets.
114#
115
116for i in ${bootp_ipbca} ${bootp_ipa} ; do
117	if [ -d /conf/${i}/etc ]; then
118		cp -Rp /conf/${i}/etc/* /etc
119	fi
120done
121
122# Tell /etc/rc to run the specified script after
123# it does its mounts but before it does anything
124# else.
125#
126# This script is responsible for setting up the
127# diskless mount environment.  This can be
128# overriden by /conf/ME/rc.conf.local if, for
129# example, you do not want to run the standard
130# system /etc/rc.diskless2
131
132diskless_mount="/etc/rc.diskless2"
133