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Diffstat (limited to 'etc/rc.initdiskless')
-rw-r--r-- | etc/rc.initdiskless | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/etc/rc.initdiskless b/etc/rc.initdiskless new file mode 100644 index 0000000..5ce555f --- /dev/null +++ b/etc/rc.initdiskless @@ -0,0 +1,100 @@ +# +# /etc/rc.diskless - general BOOTP startup +# +# BOOTP has mounted / for us. Assume a read-only mount. We must then +# - figure out where the NFS mount is coming from +# - figure out our IP by querying the interface +# - retarget /conf/ME softlink to proper configuration script directory +# +# It is expected that /etc/fstab and /etc/rc.conf.local will be +# set by the system operator on the server to be softlinks to +# /conf/ME/fstab and /conf/ME/rc.conf.local. The system operator may +# choose to retarget other files as well. The server itself boots +# properly with its default /conf/ME softlink pointing to +# /conf/server.host.name. +# +# During a diskless boot, we retarget the /conf/ME softlink to point +# to /conf/DISKLESS.CLIENT.IP.ADDRESS. Thus, various system config +# files that are softlinks through /conf/ME also get retargeted. +# +# SEE SAMPLE FILES IN /usr/share/examples/diskless. + +# chkerr: +# +# Routine to check for error +# +# checks error code and drops into shell on failure. +# if shell exits, terminates script as well as /etc/rc. + +chkerr() { + if [ $1 != 0 ]; then + echo "$2 failed: dropping into /bin/sh" + /bin/sh + # RESUME + fi +} + +# DEBUGGING +# +set -v + +# Figure out where the root mount is coming from, synthesize a mount +# for /usr and mount it. +# +# e.g. nfs_root might wind up as "A.B.C.D:/" +# +# NOTE! the /usr mount is only temporary so we can access commands necessary +# to retarget /conf/ME. The actual /usr mount should be part of the +# retargeted /etc/fstab. See instructions in /usr/share/examples/diskless. +# +set `/bin/df /` +nfs_root=$8 +mount_nfs -o ro ${nfs_root}/usr /usr + +chkerr $? "mount of /usr" + +# Figure out our interface and IP. +# + +bootp_ifc=`route -n get default | fgrep interface | awk '{ print $2; }'` +bootp_ipa=`ifconfig $bootp_ifc | fgrep inet | head -1 | awk '{ print $2; }'` + +echo "Interface $bootp_ifc IP-Address $bootp_ipa" + +umount /usr + +# retarget /conf/ME +# +# MFS's background process takes a bit to startup. Various config files +# on server should be softlinks through /conf/ME. The server's own /conf/ME +# points to the server's version of the files. +# +# We retarget /conf/ME using a -o union mount. This allows +# us to 'mkdir' over whatever was there previously. +# +# WARNING! null mounts cannot handle mmap, and since many programs +# use mmap (such as 'cp'), we have to copy. + +mount_mfs -s 256 -T qp120at -o union dummy /conf +chkerr $? "MFS mount on /conf" + +mkdir /conf/ME +cp -Rp /conf/$bootp_ipa/* /conf/ME + +# retarget the kernel +# + +sysctl -w kern.bootfile=/conf/ME/kernel + +# Tell /etc/rc to run the specified script after +# it does its mounts but before it does anything +# else. +# +# This script is responsible for setting up the +# diskless mount environment. This can be +# overriden by /conf/ME/rc.conf.local if, for +# example, you do not want to run the standard +# system /etc/rc.diskless2 + +diskless_mount="/etc/rc.diskless2" + |