143 lines
3.7 KiB
Plaintext
143 lines
3.7 KiB
Plaintext
#
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# /etc/rc.diskless - general BOOTP startup
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#
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# BOOTP has mounted / for us. Assume a read-only mount. We must then
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# - figure out where the NFS mount is coming from
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# - mount /usr via nfs
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# - figure out our IP by querying the interface
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# - setup the configuration script directory
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# - setup the configuration function
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#
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# SEE SAMPLE FILES IN /usr/share/examples/diskless. If you have nothing
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# better to do, try:
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#
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# ln -s /usr/share/examples/diskless /conf
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#
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# but at least read the README.
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# chkerr:
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#
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# Routine to check for error
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#
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# checks error code and drops into shell on failure.
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# if shell exits, terminates script as well as /etc/rc.
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chkerr() {
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if [ $1 != 0 ]; then
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echo "$2 failed: dropping into /bin/sh"
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/bin/sh
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# RESUME
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fi
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}
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# DEBUGGING
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#
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set -v
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# Figure out where the root mount is coming from, synthesize a mount
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# for /usr and mount it. Also mount /var
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#
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# e.g. nfs_root might wind up as "A.B.C.D:/"
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#
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set `/bin/df /`
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nfs_root=$8
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mount_nfs -o ro ${nfs_root}/usr /usr
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chkerr $? "mount of /usr"
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# Figure out our interface and IP.
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#
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bootp_ifc=`route -n get default | fgrep interface | awk '{ print $2; }'`
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bootp_ipa=`ifconfig $bootp_ifc | fgrep inet | head -1 | awk '{ print $2; }'`
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echo "Interface $bootp_ifc IP-Address $bootp_ipa"
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# retarget the configuration directory, where rc.conf.local and rc.local
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# are found. We set the directory to /conf/$bootp_ipa. 'conf_dir' will
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# be used by rc.conf and later in /etc/rc.
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#
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# retarget the kernel ( put a softlink in your conf directory to point to
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# the correct kernel ).
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conf_dir=/conf/$bootp_ipa
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sysctl -w kern.bootfile=$conf_dir/kernel
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if [ ! -f $conf_dir/rc.conf.local ]; then
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chkerr 1 "access to $conf_dir"
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fi
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# Tell /etc/rc to skip normal disk configuration and replace
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# it with our own.
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#
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skip_diskconf=YES
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diskless_mount_func=diskless_mount_system
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# Set defaults for MFS filesystem sizes. These can get overriden by
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# rc.conf when diskless_mount_system is called back. NOTE! These
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# defaults are generous, but may be too large for your memory/swap
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# configuration. Large is ok as long as you have sufficient NFS swap.
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#
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var_run_sectors=2048
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var_db_sectors=16384
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var_tmp_sectors=65536
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var_spool_sectors=65536
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# Default mounting pass procedure
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#
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# We have to create the filesystems that are expected
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# to be writeable.
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diskless_mount_system() {
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sysctl -w net.inet.ip.portrange.first=4000
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# This is kinda a hack at the moment. Typically, we do not want to
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# export /var from the server root due to security considerations,
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# even read-only. XXX fixme. See the tail end of the
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# /usr/share/examples/diskless/README.TEMPLATING file for the
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# reasoning and other security considerations.
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#
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if [ "X$nfs_var_mount" != "XNO" ]; then
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mount_nfs -o ro ${nfs_root}/var /var
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fi
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mount_mfs -s $var_run_sectors -T qp120at dummy /var/run
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mount_mfs -s $var_db_sectors -T qp120at dummy /var/db
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mount_mfs -s $var_tmp_sectors -T qp120at dummy /var/tmp
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mount_mfs -s $var_spool_sectors -T qp120at dummy /var/spool
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chmod 755 /var/run
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chmod 755 /var/db
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chmod 755 /var/spool
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chmod 1777 /var/tmp
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# /tmp should be a softlink to /var/tmp on most systems. If it isn't,
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# use nullfs
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#
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if [ ! -h /tmp -a ! -h /var/tmp ]; then
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mount_null /var/tmp /tmp
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fi
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# Create a skeleton spool
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#
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mkdir /var/spool/mqueue
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mkdir /var/spool/lpd
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mkdir /var/spool/output
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mkdir /var/spool/output/lpd
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chown -R root.daemon /var/spool/output
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chgrp daemon /var/spool/lpd
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# /proc may be necessary
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#
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mount_procfs proc /proc
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# We need a R+W /dev ! Use cpio to copy /dev from the
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# server to an MFS mount.
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mkdir /tmp/root
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mount ${nfs_root} /tmp/root
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mount_mfs -s 4096 -i 512 -T qp120at dummy /dev
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( cd /tmp/root ; find -x dev | cpio -o -H newc ) | \
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( cd / ; cpio -i -H newc -d )
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umount /tmp/root
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}
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