#!/bin/bash
#
# Univention Home Mounter
#  unmount the home dirs
#
# Copyright 2004-2021 Univention GmbH
#
# https://www.univention.de/
#
# All rights reserved.
#
# The source code of this program is made available
# under the terms of the GNU Affero General Public License version 3
# (GNU AGPL V3) as published by the Free Software Foundation.
#
# Binary versions of this program provided by Univention to you as
# well as other copyrighted, protected or trademarked materials like
# Logos, graphics, fonts, specific documentations and configurations,
# cryptographic keys etc. are subject to a license agreement between
# you and Univention and not subject to the GNU AGPL V3.
#
# In the case you use this program under the terms of the GNU AGPL V3,
# the program is provided 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public
# License with the Debian GNU/Linux or Univention distribution in file
# /usr/share/common-licenses/AGPL-3; if not, see
# <https://www.gnu.org/licenses/>.

MOUNTS='/var/lib/univention-home-mounter/mounts'
test -s "$MOUNTS" || exit 0

[ "${FLOCKER}" != "$0" ] && exec env FLOCKER="$0" flock -en "${MOUNTS%/*}" "$0" "$@" || :

mv "$MOUNTS" "$MOUNTS.$$"

now=$(date +%s)
while read line
do
	mp="${line% *}" seconds="${line##* }"
	if [ $((seconds+300)) -lt $now ]
	then
		mountpoint -q "$mp" || continue
		result=`LC_ALL=C umount "$mp" 2>&1` && continue
		echo "$result" | grep -Fq 'not mounted' && continue
	fi
	echo "$line" >>"$MOUNTS"
done <"$MOUNTS.$$"

rm -f "$MOUNTS.$$"
