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#! /bin/bash
# pbuilder user-mode-linux hack.
#
# pbuilder -- personal Debian package builder
# Copyright (C) 2001-2007 Junichi Uekawa
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
set -e
function cleanup_function () {
rm -f ${INSIDE_PBUILDER}
${EXTRACLEANUP}
}
. /usr/lib/pbuilder/pbuilder-loadconfig
OPERATION="$1"
shift;
. /usr/lib/pbuilder/pbuilder-uml-checkparams
function usecow () {
PBUILDER_COWFILENAME="${BUILDPLACE}/$$.cow"
PBUILDER_COW="${PBUILDER_COWFILENAME},"
if ! touch "${PBUILDER_COWFILENAME}"; then
echo "E: Cannot write-access to the COW file, check buildplace" >&2
exit 1;
fi
rm -f "${PBUILDER_COWFILENAME}"
}
function cleancow () {
# clean the cow file
rm -f "${PBUILDER_COWFILENAME}"
}
function operate_uml () {
# opeartes on UML, and runs pbuilder $1
# use this script file to bootstrap the pbuilder inside the UML
INSIDE_PBUILDER=$(tempfile)
trap cleanup_function exit
UML_CHROOT_MOUNTPOINT=/var/cache/pbuilder/pbuilder-mnt
UML_CHROOT_BUILDRESULTMOUNTDIR=/var/cache/pbuilder/pbuilder-umlresult
#The following script is ran inside UML as soon as it is started.
cat <<EOF > ${INSIDE_PBUILDER}
#! /bin/bash
${UML_DEBUGMODE}
mount -t proc /proc /proc
mount -t tmpfs /tmp /tmp
# create devices
mount -t tmpfs tmpfs /dev
mknod /dev/ubdb b 98 16
#if ! fsck -p /dev/ubdb; then
# echo "W: Failed to fsck /dev/ubdb"
#fi
if ! mount -t ext2 /dev/ubdb ${UML_CHROOT_MOUNTPOINT}; then
echo "E: Cannot mount /dev/ubdb, is UML root image accessible as current user?" >&2
exit 1
fi
mount --bind ${UML_CHROOT_MOUNTPOINT}/dev /dev
# mount /lib/modules on the hostfs
kernel_modules=\$(sed -ne 's\$.*/lib/modules.*hostfs.*defaults,ro,\([^[:space:]]*\).*\$\1\$p' ${UML_CHROOT_MOUNTPOINT}/etc/fstab)
if [ -n "\${kernel_modules}" ] ; then
echo " -> Mount /lib/modules on the host \${kernel_modules}"
mount -t hostfs -o ro,\${kernel_modules} hostfs /lib/modules
fi
export LOGNAME="${LOGNAME}"
export HOME="${HOME}"
hostname "${UML_HOSTNAME}"
if [ "${UML_MOUNT_TMPFS}" = "yes" ]; then
mount -t tmpfs ${UML_CHROOT_MOUNTPOINT}/tmp ${UML_CHROOT_MOUNTPOINT}/tmp
else
# clean up tmp before playing with it.
rm -rf ${UML_CHROOT_MOUNTPOINT}/tmp
mkdir ${UML_CHROOT_MOUNTPOINT}/tmp
chmod 1777 ${UML_CHROOT_MOUNTPOINT}/tmp
fi
cat <<IP > ${UML_CHROOT_MOUNTPOINT}/etc/network/interfaces
auto lo
iface lo inet loopback
# The first network card - this entry was created during the Debian installation
auto eth0
iface eth0 inet static
address $UML_IP
netmask $UML_NETMASK
network $UML_NETWORK
broadcast $UML_BROADCAST
gateway $UML_GATEWAY
IP
cat <<SHELL > ${UML_CHROOT_MOUNTPOINT}/tmp/chrootshell
#! /bin/bash
${UML_DEBUGMODE}
# the shell executed inside chroot inside UML
echo Starting network inside the chroot
/etc/init.d/networking stop
/etc/init.d/networking start
SHELL
chmod a+x ${UML_CHROOT_MOUNTPOINT}/tmp/chrootshell
chroot ${UML_CHROOT_MOUNTPOINT} /tmp/chrootshell
#some variables need to be set from outside values, possibly
export PATH="$PATH"
export TMPDIR=/tmp
unset EXTRAOPT || true
declare -a EXTRAOPT
if [ -n "${UML_DISTRIBUTION}" ]; then
EXTRAOPT[0]="--distribution"
EXTRAOPT[1]="${UML_DISTRIBUTION}"
fi
if [ -z "${UML_BUILDRESULT}" ]; then
BUILDRESULT=
else
echo " -> Mount build result dir outside UML [${UML_BUILDRESULT}] as [${UML_CHROOT_BUILDRESULTMOUNTDIR}]"
BUILDRESULT=${UML_CHROOT_BUILDRESULTMOUNTDIR}
mkdir -p ${UML_CHROOT_BUILDRESULTMOUNTDIR} || true
mount -t hostfs none "${UML_CHROOT_BUILDRESULTMOUNTDIR}" -o "${UML_BUILDRESULT}"
fi
pbuilder "$1" ${UML_EXTRAOPT} \${EXTRAOPT[@]} --buildresult "\${BUILDRESULT}" --buildplace "${UML_CHROOT_MOUNTPOINT}" --internal-build-uml ${UML_DEBUGMODE:+--debug} ${BUILDING_DSC_FILE} ${UML_EXECUTE_EXTRAOPT}
echo \$? > /proc/exitcode
if [ -n "\${kernel_modules}" ] ; then
umount /lib/modules
fi
umount /dev
umount ${UML_CHROOT_MOUNTPOINT}
/sbin/halt -d -f
EOF
chmod a+x ${INSIDE_PBUILDER}
if [ $( id -u ) = 0 ]; then
echo "W: You are uid=0. Don't run UML as uid=0, it's not supported." >&2
fi
echo Invoking: "linux mem=${UML_MEM} eth0=${MY_ETH0} con0=fd:0,fd:1 con=pty root=/dev/root rootflags=/ rootfstype=hostfs ubd1=${PBUILDER_COW}${PBUILDER_UML_IMAGE} init=${INSIDE_PBUILDER} rw"
if linux mem=${UML_MEM} eth0=${MY_ETH0} con0=fd:0,fd:1 con=pty root=/dev/root rootflags=/ rootfstype=hostfs ubd1="${PBUILDER_COW}${PBUILDER_UML_IMAGE}" devfs=mount init=${INSIDE_PBUILDER} rw ; then
UML_EXITCODE=$?
echo " -> Successful exit from user-mode linux"
else
UML_EXITCODE=$?
echo " -> Exit code ${UML_EXITCODE}"
fi
}
BUILDING_DSC_FILE=$(readlink -f "$1") || true # ignore failure here
EXTRACLEANUP=
UML_EXITCODE=1
case "${OPERATION}" in
build)
usecow
EXTRACLEANUP=cleancow
operate_uml build
;;
update)
operate_uml update
;;
login)
if [ "${UML_LOGIN_NOCOW}" = "yes" ]; then
echo " -> Not using COW filesystem for login session, modifications to this session will persist"
else
usecow
EXTRACLEANUP=cleancow
fi
operate_uml login
;;
execute)
if [ "${UML_LOGIN_NOCOW}" = "yes" ]; then
echo " -> Not using COW filesystem for login session, modifications to this session will persist"
else
usecow
EXTRACLEANUP=cleancow
fi
shift;
UML_EXECUTE_EXTRAOPT="${UML_EXECUTE_EXTRAOPT} $@"
operate_uml execute
;;
dumpconfig)
echo " -> start dump outside of UML"
echo " -> set"
set;
echo " -> env"
env;
echo " -> end dump outside of UML"
usecow
EXTRACLEANUP=cleancow
operate_uml dumpconfig
;;
create)
if [ -n "${UML_DISTRIBUTION}" ]; then
if [ ! -d ~/.pbuilder-user-mode-linux ]; then
mkdir ~/.pbuilder-user-mode-linux
fi
sed "s/dist=.*/dist=${UML_DISTRIBUTION}/" /etc/rootstrap/rootstrap.conf > ~/.pbuilder-user-mode-linux/rootstrap.conf
if [ -f rootstrap.conf ]; then
sed "s/dist=.*/dist=${UML_DISTRIBUTION}/" rootstrap.conf > ~/.pbuilder-user-mode-linux/rootstrap.conf
fi
cd ~/.pbuilder-user-mode-linux
fi
rootstrap -s ${ROOTSTRAP_IMAGESIZE:=1000} ${PBUILDER_UML_IMAGE}
operate_uml update
;;
*)
echo "Error: Unknown option [${OPERATION}] was specified " >&2
;;
esac
exit ${UML_EXITCODE}
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