3cc4938297
the null mount, we currently create a temporary mfs on /tmp, copy
/etc to /tmp, then mount /etc as mfs and copy everything back from
/tmp, then delete the /tmp mfs.
The patch eliminates the temporary /tmp mfs and the subsequent
copying and simply populates the /etc mfs by copying from
/conf/default/etc. This requires that /conf/default/etc contain a
complete copy of all the /etc stuff instead of just overrides. I
don't think that is too much of an extra step in setting up a
diskless environment.
* Provide the ability to make /tmp a memory filesystem independent
of /var. This removes the requirement that /tmp be a symlink to
/var/tmp and this makes the diskless code work with the default
filesystem layout. If a seperate /tmp memory filesystem is
created, the 'tmpsize' environment variable is used to determine
its size (default to 10 Meg).
* Reduce diffs between the -current and -stable versions of these
files to a bare minimum. Only the definition of the shell
function 'mount_md' is different.
Not Objected to by: -arch@, -small@
MFC after: 2 days
137 lines
4.1 KiB
Plaintext
137 lines
4.1 KiB
Plaintext
# Copyright (c) 1999 Matt Dillion
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# $FreeBSD$
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#
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#
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# /etc/rc.diskless1 - 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 our IP by querying the interface
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# - copy /etc temporarily out of the way to /tmp/etc
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# - mount /etc as an MFS
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# - repopulate /etc with the saved off copy
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# - override files in /etc with files from /conf/*/etc where
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# '*' is default, netmask of client, ip-address of client
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#
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# WARNING: i thing you should not change /etc/rc or strange things could
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# happen.
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#
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# The operator is in charge of setting /conf/*/etc/* things as appropriate.
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# Typically rc.conf and fstab need to be changed, but possibly
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# also other files such as inetd.conf etc.
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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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#
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chkerr() {
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case $1 in
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0)
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;;
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*)
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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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;;
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esac
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}
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mount_md() {
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/sbin/mdconfig -a -t malloc -s $1 -u $3
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/sbin/disklabel -r -w md$3 auto
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/sbin/newfs /dev/md$3c
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/sbin/mount /dev/md$3c $2
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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 our interface and IP.
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#
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bootp_ifc=""
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bootp_ipa=""
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bootp_ipbca=""
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iflist=`ifconfig -l`
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for i in ${iflist} ; do
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set `ifconfig ${i}`
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while [ $# -ge 1 ] ; do
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if [ "${bootp_ifc}" = "" -a "$1" = "inet" ] ; then
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bootp_ifc=${i} ; bootp_ipa=${2} ; shift
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fi
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if [ "${bootp_ipbca}" = "" -a "$1" = "broadcast" ] ; then
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bootp_ipbca=$2; shift
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fi
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shift
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done
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if [ "${bootp_ifc}" != "" ] ; then
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break
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fi
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done
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echo "Interface ${bootp_ifc} IP-Address ${bootp_ipa} Broadcast ${bootp_ipbca}"
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# Create an MFS /tmp to temporarily hold files from /etc until we
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# can bootstrap /etc as an MFS.
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mount_md 4096 /etc 0
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chkerr $? "MFS mount on /etc"
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/bin/chmod 755 /etc
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/bin/cp -Rp /conf/default/etc/* /etc
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chkerr $? "cp /conf/default/etc to /etc MFS"
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# Allow for override files to replace files in /etc. Use /conf/*/etc
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# to find the override files. First choice is default files that
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# always override, then files that from the directory that matches the
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# client's broadcast address, finally followed by overrides that match
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# the client's IP address.
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#
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# This way we have some flexibility to handle clusters of machines
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# on separate subnets.
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#
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for i in ${bootp_ipbca} ${bootp_ipa} ; do
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if [ -d /conf/${i}/etc ]; then
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cp -Rp /conf/${i}/etc/* /etc
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fi
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done
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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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