umount_filesystems

#!/bin/bash
#
# Copyright (C) 2022  David Valin dvalin@redhat.com
#
# 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.
#

mount_pnt=""
number_mount_pnts=""

usage()
{
	echo "Usage: $1"
	echo "  --mount_pnt: directory to mount to"
	echo "  --number_mount_pnts: Number of devices mounted."
	exit 1
}


#
# Define options
#
ARGUMENT_LIST=(
        "mount_pnt"
	"number_mount_pnts"
)

NO_ARGUMENTS=(
        "usage"
)

# read arguments
opts=$(getopt \
    --longoptions "$(printf "%s:," "${ARGUMENT_LIST[@]}")" \
    --longoptions "$(printf "%s," "${NO_ARGUMENTS[@]}")" \
    --name "$(basename "$0")" \
    --options "h" \
    -- "$@"
)

if [ $? -ne 0 ]; then
        exit
fi
eval set --$opts

while [[ $# -gt 0 ]]; do
	case "$1" in
		--mount_pnt)
			mount_pnt=$2
			shift 2
		;;
		--number_mount_pnts)
			number_mount_pnts=$2
			shift 2
		;;
		--usage)
			usage $0
		;;
		-h)
			usage $0
		;;
		--)
			break;
		;;
		*)
			echo option not found $1
			usage $0
		;;
	esac
done

if [[ $mount_pnt == "" ]]; then
	echo Need to designate mount point prefix
	usage
fi
if [[ $number_mount_pnts == "" ]]; then
	echo Need to designate the number of mount points
	usage
fi

let "number_mount_pnts=$number_mount_pnts-1"
for findex in `seq 0 1 $number_mount_pnts`
do
	umount  ${mount_pnt}${findex}
done