#!/bin/bash
#**************************************************************************
# Copyright 2017 Hewlett Packard Enterprise Development LP.
# 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 Street, Fifth Floor, Boston, MA 02110-1301, USA.
#***************************************************************************

CMU_HOST=`echo $SSH_CLIENT|awk '{print $1}'`
CMU_CLIENT=`echo $SSH_CONNECTION|awk '{print $3}'`

# if its a PDSH to the same CMU Host, then simply return
# as there as there is nothing to install
if [ $CMU_HOST == $CMU_CLIENT ]; then
        exit 0;
fi

date > /tmp/linuxki.last.run
echo $0 >> /tmp/linuxki.last.run
mount >> /tmp/linuxki.last.run

echo --- Linux KI Toolset node uninstall starting...

# Check for stale NFS mount point and remount if stale
grep -q -e " /opt/linuxki " /etc/fstab
if [ $? -eq 0 ]; then
	TMPFILE=`mktemp`
	ls /opt/linuxki/config > /dev/null 2> $TMPFILE
	grep -q Stale $TMPFILE && umount -f /opt/linuxki && mount /opt/linuxki 
	rm -f $TMPFILE
fi

[ -f /opt/linuxki/config ] && . /opt/linuxki/config

[ -z $CMU_DATADIR ] && CMU_DATADIR=/var/linuxki

#
# Remove NFS mounts from /etc/fstab
# Its OK if one or more are not present
#
grep -q -e " /opt/linuxki " -e " $CMU_DATADIR " /etc/fstab
if [ $? -eq 0 ]; then
	TMPFILE=`mktemp`
	grep -v -e " /opt/linuxki " -e " $CMU_DATADIR " -e "Linux KI" /etc/fstab > $TMPFILE
	mv $TMPFILE /etc/fstab
	chmod 644 /etc/fstab
	rm -f $TMPFILE
fi

#
# if directories are NFS mounted, then unmount them
#
mount | grep " /opt/linuxki " | grep -q " nfs"
if [ $? -eq 0 ]; then
	umount -f /opt/linuxki
fi

mount | grep " $CMU_DATADIR " | grep -q " nfs"
if [ $? -eq 0 ]; then
	umount -f $CMU_DATADIR
fi

#
# Remove module
#
modprobe -r -q likit
rm -f /lib/modules/`uname -r`/misc/likit.ko 2>> /dev/null
depmod

rm -f /tmp/linuxki_node_remove

date >> /tmp/linuxki.last.run
echo --- Linux KI Toolset node uninstall complete!
exit 0