rc.initdiskless revision 43803
143803Sdillon# 243803Sdillon# /etc/rc.diskless - general BOOTP startup 343803Sdillon# 443803Sdillon# BOOTP has mounted / for us. Assume a read-only mount. We must then 543803Sdillon# - figure out where the NFS mount is coming from 643803Sdillon# - figure out our IP by querying the interface 743803Sdillon# - retarget /conf/ME softlink to proper configuration script directory 843803Sdillon# 943803Sdillon# It is expected that /etc/fstab and /etc/rc.conf.local will be 1043803Sdillon# set by the system operator on the server to be softlinks to 1143803Sdillon# /conf/ME/fstab and /conf/ME/rc.conf.local. The system operator may 1243803Sdillon# choose to retarget other files as well. The server itself boots 1343803Sdillon# properly with its default /conf/ME softlink pointing to 1443803Sdillon# /conf/server.host.name. 1543803Sdillon# 1643803Sdillon# During a diskless boot, we retarget the /conf/ME softlink to point 1743803Sdillon# to /conf/DISKLESS.CLIENT.IP.ADDRESS. Thus, various system config 1843803Sdillon# files that are softlinks through /conf/ME also get retargeted. 1943803Sdillon# 2043803Sdillon# SEE SAMPLE FILES IN /usr/share/examples/diskless. 2143803Sdillon 2243803Sdillon# chkerr: 2343803Sdillon# 2443803Sdillon# Routine to check for error 2543803Sdillon# 2643803Sdillon# checks error code and drops into shell on failure. 2743803Sdillon# if shell exits, terminates script as well as /etc/rc. 2843803Sdillon 2943803Sdillonchkerr() { 3043803Sdillon if [ $1 != 0 ]; then 3143803Sdillon echo "$2 failed: dropping into /bin/sh" 3243803Sdillon /bin/sh 3343803Sdillon # RESUME 3443803Sdillon fi 3543803Sdillon} 3643803Sdillon 3743803Sdillon# DEBUGGING 3843803Sdillon# 3943803Sdillonset -v 4043803Sdillon 4143803Sdillon# Figure out where the root mount is coming from, synthesize a mount 4243803Sdillon# for /usr and mount it. 4343803Sdillon# 4443803Sdillon# e.g. nfs_root might wind up as "A.B.C.D:/" 4543803Sdillon# 4643803Sdillon# NOTE! the /usr mount is only temporary so we can access commands necessary 4743803Sdillon# to retarget /conf/ME. The actual /usr mount should be part of the 4843803Sdillon# retargeted /etc/fstab. See instructions in /usr/share/examples/diskless. 4943803Sdillon# 5043803Sdillonset `/bin/df /` 5143803Sdillonnfs_root=$8 5243803Sdillonmount_nfs -o ro ${nfs_root}/usr /usr 5343803Sdillon 5443803Sdillonchkerr $? "mount of /usr" 5543803Sdillon 5643803Sdillon# Figure out our interface and IP. 5743803Sdillon# 5843803Sdillon 5943803Sdillonbootp_ifc=`route -n get default | fgrep interface | awk '{ print $2; }'` 6043803Sdillonbootp_ipa=`ifconfig $bootp_ifc | fgrep inet | head -1 | awk '{ print $2; }'` 6143803Sdillon 6243803Sdillonecho "Interface $bootp_ifc IP-Address $bootp_ipa" 6343803Sdillon 6443803Sdillonumount /usr 6543803Sdillon 6643803Sdillon# retarget /conf/ME 6743803Sdillon# 6843803Sdillon# MFS's background process takes a bit to startup. Various config files 6943803Sdillon# on server should be softlinks through /conf/ME. The server's own /conf/ME 7043803Sdillon# points to the server's version of the files. 7143803Sdillon# 7243803Sdillon# We retarget /conf/ME using a -o union mount. This allows 7343803Sdillon# us to 'mkdir' over whatever was there previously. 7443803Sdillon# 7543803Sdillon# WARNING! null mounts cannot handle mmap, and since many programs 7643803Sdillon# use mmap (such as 'cp'), we have to copy. 7743803Sdillon 7843803Sdillonmount_mfs -s 256 -T qp120at -o union dummy /conf 7943803Sdillonchkerr $? "MFS mount on /conf" 8043803Sdillon 8143803Sdillonmkdir /conf/ME 8243803Sdilloncp -Rp /conf/$bootp_ipa/* /conf/ME 8343803Sdillon 8443803Sdillon# retarget the kernel 8543803Sdillon# 8643803Sdillon 8743803Sdillonsysctl -w kern.bootfile=/conf/ME/kernel 8843803Sdillon 8943803Sdillon# Tell /etc/rc to run the specified script after 9043803Sdillon# it does its mounts but before it does anything 9143803Sdillon# else. 9243803Sdillon# 9343803Sdillon# This script is responsible for setting up the 9443803Sdillon# diskless mount environment. This can be 9543803Sdillon# overriden by /conf/ME/rc.conf.local if, for 9643803Sdillon# example, you do not want to run the standard 9743803Sdillon# system /etc/rc.diskless2 9843803Sdillon 9943803Sdillondiskless_mount="/etc/rc.diskless2" 10043803Sdillon 101