rc.initdiskless revision 51237
1# $FreeBSD: head/etc/rc.initdiskless 51237 1999-09-13 17:09:08Z peter $ 2# 3# /etc/rc.diskless - general BOOTP startup 4# 5# BOOTP has mounted / for us. Assume a read-only mount. We must then 6# - figure out where the NFS mount is coming from 7# - figure out our IP by querying the interface 8# - retarget /conf/ME softlink to proper configuration script directory 9# 10# It is expected that /etc/fstab and /etc/rc.conf.local will be 11# set by the system operator on the server to be softlinks to 12# /conf/ME/fstab and /conf/ME/rc.conf.local. The system operator may 13# choose to retarget other files as well. The server itself boots 14# properly with its default /conf/ME softlink pointing to 15# /conf/server.host.name. 16# 17# During a diskless boot, we retarget the /conf/ME softlink to point 18# to /conf/DISKLESS.CLIENT.IP.ADDRESS. Thus, various system config 19# files that are softlinks through /conf/ME also get retargeted. 20# 21# SEE SAMPLE FILES IN /usr/share/examples/diskless. 22 23# chkerr: 24# 25# Routine to check for error 26# 27# checks error code and drops into shell on failure. 28# if shell exits, terminates script as well as /etc/rc. 29# 30chkerr() { 31 case $1 in 32 0) 33 ;; 34 *) 35 echo "$2 failed: dropping into /bin/sh" 36 /bin/sh 37 # RESUME 38 ;; 39 esac 40} 41 42# DEBUGGING 43# 44set -v 45 46# Figure out where the root mount is coming from, synthesize a mount 47# for /usr and mount it. 48# 49# e.g. nfs_root might wind up as "A.B.C.D:/" 50# 51# NOTE! the /usr mount is only temporary so we can access commands necessary 52# to retarget /conf/ME. The actual /usr mount should be part of the 53# retargeted /etc/fstab. See instructions in /usr/share/examples/diskless. 54# 55set `/bin/df /` 56nfs_root=$8 57mount_nfs -o ro ${nfs_root}/usr /usr 58 59chkerr $? "mount of /usr" 60 61# Figure out our interface and IP. 62# 63 64bootp_ifc=`route -n get default | fgrep interface | awk '{ print $2; }'` 65bootp_ipa=`ifconfig ${bootp_ifc} | fgrep inet | head -1 | awk '{ print $2; }'` 66 67echo "Interface ${bootp_ifc} IP-Address ${bootp_ipa}" 68 69umount /usr 70 71# retarget /conf/ME 72# 73# MFS's background process takes a bit to startup. Various config files 74# on server should be softlinks through /conf/ME. The server's own /conf/ME 75# points to the server's version of the files. 76# 77# We retarget /conf/ME using a -o union mount. This allows 78# us to 'mkdir' over whatever was there previously. 79# 80# WARNING! null mounts cannot handle mmap, and since many programs 81# use mmap (such as 'cp'), we have to copy. 82# 83mount_mfs -s 256 -T qp120at -o union dummy /conf 84chkerr $? "MFS mount on /conf" 85 86mkdir /conf/ME 87cp -Rp /conf/$bootp_ipa/* /conf/ME 88 89# retarget the kernel 90# 91 92sysctl -w kern.bootfile=/conf/ME/kernel 93 94# Tell /etc/rc to run the specified script after 95# it does its mounts but before it does anything 96# else. 97# 98# This script is responsible for setting up the 99# diskless mount environment. This can be 100# overriden by /conf/ME/rc.conf.local if, for 101# example, you do not want to run the standard 102# system /etc/rc.diskless2 103 104diskless_mount="/etc/rc.diskless2" 105