#! /bin/bash
#
# restart-anaconda: Debugging tool to restart stage2 Anaconda.
#
# Copyright (C) 2010
# Red Hat, Inc.  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; 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, see <http://www.gnu.org/licenses/>.
#

RESTART_FILE=/tmp/restart_anaconda
ANACONDA_PID=`cat /var/run/anaconda.pid`

descendants() {
    PID=$1
    DIRECT=`ps --ppid $PID -o pid=`
    INDIRECT=''
    for child in $DIRECT; do
	INDIRECT+=' '`descendants $child`
    done
    # prepend grandchildren, we are goingt to kill them first  
    DESCENDANTS=$INDIRECT' '$DIRECT
    echo $DESCENDANTS
}

anaconda_descendants() {
    descendants $ANACONDA_PID
}

# this is how loader knows it should restart stuff. 
# it will also delete the file once the restart is in progress.
touch $RESTART_FILE

# kill all anaconda descendants and anaconda itself
RESTART_VICTIMS=`anaconda_descendants`
RESTART_VICTIMS+=' '$ANACONDA_PID
if [[ -f /var/run/iscsid.pid ]]; then
    # iscsid must die else it will cause us troubles on the next run
    RESTART_VICTIMS+=' '`cat /var/run/iscsid.pid`
    # log out of all nodes
    /sbin/iscsiadm -m node --logoutall=all
fi
echo "killing processes: " $RESTART_VICTIMS
for child in $RESTART_VICTIMS; do
    kill -s KILL $child &>/dev/null
done
