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e4715b9359
more opportunities for overriding. Clean up /etc/rc ( remove conf_dir,
remove startup mount special cases, remove other special cases )
101 lines
2.8 KiB
Plaintext
101 lines
2.8 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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# - figure out our IP by querying the interface
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# - retarget /conf/ME softlink to proper configuration script directory
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#
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# It is expected that /etc/fstab and /etc/rc.conf.local will be
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# set by the system operator on the server to be softlinks to
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# /conf/ME/fstab and /conf/ME/rc.conf.local. The system operator may
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# choose to retarget other files as well. The server itself boots
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# properly with its default /conf/ME softlink pointing to
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# /conf/server.host.name.
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#
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# During a diskless boot, we retarget the /conf/ME softlink to point
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# to /conf/DISKLESS.CLIENT.IP.ADDRESS. Thus, various system config
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# files that are softlinks through /conf/ME also get retargeted.
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#
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# SEE SAMPLE FILES IN /usr/share/examples/diskless.
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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.
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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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# NOTE! the /usr mount is only temporary so we can access commands necessary
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# to retarget /conf/ME. The actual /usr mount should be part of the
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# retargeted /etc/fstab. See instructions in /usr/share/examples/diskless.
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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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umount /usr
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# retarget /conf/ME
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#
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# MFS's background process takes a bit to startup. Various config files
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# on server should be softlinks through /conf/ME. The server's own /conf/ME
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# points to the server's version of the files.
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#
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# We retarget /conf/ME using a -o union mount. This allows
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# us to 'mkdir' over whatever was there previously.
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#
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# WARNING! null mounts cannot handle mmap, and since many programs
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# use mmap (such as 'cp'), we have to copy.
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mount_mfs -s 256 -T qp120at -o union dummy /conf
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chkerr $? "MFS mount on /conf"
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mkdir /conf/ME
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cp -Rp /conf/$bootp_ipa/* /conf/ME
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# retarget the kernel
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#
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sysctl -w kern.bootfile=/conf/ME/kernel
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# Tell /etc/rc to run the specified script after
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# it does its mounts but before it does anything
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# else.
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#
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# This script is responsible for setting up the
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# diskless mount environment. This can be
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# overriden by /conf/ME/rc.conf.local if, for
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# example, you do not want to run the standard
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# system /etc/rc.diskless2
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diskless_mount="/etc/rc.diskless2"
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