rc.initdiskless revision 55520 
1# $FreeBSD: head/etc/rc.initdiskless 55520 2000-01-06 18:17:38Z luigi $
2#
3# /etc/rc.diskless1 - general BOOTP startup
4#
5# BOOTP has mounted / for us.  Assume a read-only mount.  We must then
6# - figure out our IP by querying the interface
7# - fill /conf/etc (writable) with files from /etc, and then update
8#   per-machine files from /conf/*/ where * is the IP of the host,
9#   the IP of the subnet, "default", or nothing.
10# - mount /conf/etc over /etc so we can see the new files.
11#
12# WARNING: i thing you should not change /etc/rc or strange things could
13# happen.
14#
15# The operator is in charge of setting /conf/*/etc/* things as appropriate.
16# Typically rc.conf and fstab need to be changed, but possibly
17# also other files such as inetd.conf etc.
18
19# chkerr:
20#
21# Routine to check for error
22#
23#	checks error code and drops into shell on failure.
24#	if shell exits, terminates script as well as /etc/rc.
25#
26chkerr() {
27	case $1 in
28	0)
29		;;
30	*)
31		echo "$2 failed: dropping into /bin/sh"
32		/bin/sh
33		# RESUME
34		;;
35	esac
36}
37
38# DEBUGGING
39#
40# set -v
41
42# Figure out our interface and IP.
43#
44bootp_ifc=""
45bootp_ipa=""
46bootp_ipbca=""
47iflist=`ifconfig -l`
48for i in ${iflist} ; do
49    set `ifconfig ${i}`
50    while [ $# -ge 1 ] ; do
51        if [ "${bootp_ifc}" = "" -a "$1" = "inet" ] ; then
52            bootp_ifc=${i} ; bootp_ipa=${2} ; shift
53        fi
54        if [ "${bootp_ipbca}" = "" -a "$1" = "broadcast" ] ; then
55            bootp_ipbca=$2; shift
56        fi
57        shift
58    done
59    if [ "${bootp_ifc}" != "" ] ; then
60        break
61    fi
62done
63echo "Interface ${bootp_ifc} IP-Address ${bootp_ipa} Broadcast ${bootp_ipbca}"
64 
65# Files in /etc are copied to /conf/etc which is writable. Then
66# per-machine configs from /conf/ip.address/etc are copied onto this
67# directory. First choice is using the client's IP, then the client's
68# broadcast address, then a default configuration.
69# This way we have some flexibility to handle clusters of machines
70# on separate subnets.
71#
72# WARNING! null mounts cannot handle mmap, and since many programs
73# use mmap (such as 'cp'), we have to copy.
74#
75mount_mfs -s 2048 -T qp120at dummy /conf/etc
76cp -Rp /etc/* /conf/etc
77chkerr $? "MFS mount on /conf/etc"
78
79if [ -d /conf/${bootp_ipa} ] ; then
80        cp -Rp /conf/${bootp_ipa}/etc/* /conf/etc
81elif [ -d /conf/${bootp_ipbca} ] ; then
82        cp -Rp /conf/${bootp_ipbca}/etc/* /conf/etc
83else
84        cp -Rp /conf/default/etc/* /conf/etc
85fi
86
87# Make the new directory available as /etc
88#
89mount_null /conf/etc /etc
90
91# Tell /etc/rc to run the specified script after
92# it does its mounts but before it does anything
93# else.
94#
95# This script is responsible for setting up the
96# diskless mount environment.  This can be
97# overriden by /conf/ME/rc.conf.local if, for
98# example, you do not want to run the standard
99# system /etc/rc.diskless2
100
101diskless_mount="/etc/rc.diskless2"
102