#!/bin/sh
#-
# Copyright (c) 2014 The FreeBSD Foundation
# All rights reserved.
#
# This software was developed by Glen Barber under sponsorship
# from the FreeBSD Foundation.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# mk-vmimage.sh: Create virtual machine disk images in various formats.
#
# $FreeBSD$
#
PATH="/bin:/usr/bin:/sbin:/usr/sbin"
export PATH
usage() {
echo "$(basename ${0}) <command> <target> [...]"
exit 1
}
panic() {
rc="${1}"
shift 1
msg="${@}"
printf "${msg}\n"
if [ ! -z "${mddev}" ]; then
mdconfig -d -u ${mddev}
fi
# Do not allow one failure case to chain through any remaining image
# builds.
exit 0
}
vm_create_baseimage() {
# Creates the UFS root filesystem for the virtual machine disk,
# written to the formatted disk image with mkimg(1).
i=0
mkdir -p ${DESTDIR}
truncate -s ${VMSIZE} ${VMBASE}
mddev=$(mdconfig -f ${VMBASE})
newfs -j /dev/${mddev}
mount /dev/${mddev} ${DESTDIR}
cd ${WORLDDIR} && \
${IMAKE} DESTDIR=${DESTDIR} \
installworld installkernel distribution || \
panic 1 "\n\nCannot install the base system to ${DESTDIR}."
chroot ${DESTDIR} /usr/bin/newaliases
echo '# Custom /etc/fstab for FreeBSD VM images' \
> ${DESTDIR}/etc/fstab
echo '/dev/gpt/rootfs / ufs rw 2 2' \
>> ${DESTDIR}/etc/fstab
echo '/dev/gpt/swapfs none swap sw 0 0' \
>> ${DESTDIR}/etc/fstab
sync
while ! umount ${DESTDIR}; do
i=$(( $i + 1 ))
if [ $i -ge 10 ]; then
# This should never happen. But, it has happened.
msg="Cannot umount(8) ${DESTDIR}\n"
msg="${msg}Something has gone horribly wrong."
panic 1 "${msg}"
fi
sleep 1
done
return 0
}
vm_create_vmdisk() {
mkimg_version=$(mkimg --version 2>/dev/null | awk '{print $2}')
# We need mkimg(1) '--version' output, at minimum, to be able to
# tell what virtual machine disk image formats are available.
# Bail if mkimg(1) reports an empty '--version' value.
if [ -z "${mkimg_version}" ]; then
msg="Cannot determine mkimg(1) version.\n"
msg="${msg}Cannot continue without a known mkimg(1) version."
panic 0 "${msg}"
fi
if ! mkimg --formats 2>/dev/null | grep -q ${FORMAT}; then
panic 0 "'${FORMAT}' is not supported by this mkimg(1).\n"
fi
case ${FORMAT} in
vhd)
mkimg_format=vhdf
;;
*)
mkimg_format=${FORMAT}
;;
esac
mkimg -f ${mkimg_format} -s gpt \
-b /boot/pmbr -p freebsd-boot/bootfs:=/boot/gptboot \
-p freebsd-swap/swapfs::1G \
-p freebsd-ufs/rootfs:=${VMBASE} \
-o ${VMIMAGE}
return 0
}
main() {
cmd="${1}"
if [ -z "${MAKEFLAGS}" ]; then
echo "It is probably not safe to run this by hand yet..."
fi
case ${cmd} in
vm-base)
eval vm_create_baseimage "$@" || return 0
;;
vm-image)
eval vm_create_vmdisk "$@" || return 0
;;
*|\?)
usage
;;
esac
return 0
}
main "$@"
