#!/bin/sh
# copyright (C) 2013-2014 FUJITSU LIMITED All Rights Reserved

# 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; version 2
# of the License.
#
# 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 Street, Fifth Floor, Boston, MA
# 02110-1301, USA.

# check root
if [ ${EUID:-${UID}} != 0 ]; then
    echo "error: Because you are not root, you cannot execute this command. "
    exit 1
fi

# check args
if [ $# -lt 2 ]; then
	echo "usage lxcf-update1 LXCNAME COMMAND"
	exit 1
fi

# args and environment variables
LXCNAME=$1
shift 1
UPDATECMD=$*
PREFIX=/opt/lxcf/${LXCNAME}
WORKUSR=/opt/lxcf/.work/usr

if [ ! -e  /etc/lxcf/rsc/$LXCNAME/container_name ] ; then
  exit 1
fi

# get the lxcf container model
LXCMODEL=`/usr/lib64/lxcf/lxcf-list | /usr/bin/awk '($1 == "'${LXCNAME}'"){print $2}'`

# check container state
LXCSTATE=`LANG=C /usr/bin/virsh -c lxc:/// list | /usr/bin/awk '($2 == "'${LXCNAME}'"){print $3}'`

# check model
LXCMODEL=`awk '{ if (NF==2) print $2 }' /etc/lxcf/rsc/$LXCNAME/container_name `

# stop container
#if [ -n "${LXCSTATE}" ] && [ ${LXCSTATE} = "running" ] ; then
#	/usr/lib64/lxcf/lxcf-stop ${LXCNAME};
#fi

if [ x${LXCMODEL} = x"joint" ] ; then
  # mount dummy /usr
  if [ ${LXCMODEL} = "joint" ] ; then
	rsync -a --inplace /usr/ $WORKUSR >& /dev/null
	/bin/mount --bind ${WORKUSR} ${PREFIX}/usr
	trap '/bin/umount -f ${PREFIX}/usr >& /dev/null' 0
  fi
fi

# chroot new root filesystem & exec lxcf-update2
chroot ${PREFIX} /usr/lib64/lxcf/lxcf-update2 ${LXCNAME} ${PWD} ${UPDATECMD}

exit $?
