#!/bin/bash
#
# Univention system stats
#
# Copyright 2010-2020 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/>.

date=$(date)
log="/var/log/univention/system-stats.log"

declare -a cmds=(
	"$(command -v df) -lhT"
	"$(command -v ps) auxf"
	"$(command -v top) -b -n2"
	"$(command -v free)"
	"$(command -v uptime)"
	"$(command -v sensors)"
	"$(command -v smbstatus)"
)

# print usage
function usage () {
	echo "usage: ${0##*/} [-h]"
	echo "This script logs some systems stats (df, free, ...) in \"$log\"."

	exit 0
}

# get options
while getopts ':h:' OPTION ; do
	case "$OPTION" in
		h)   usage ;;
		*)   usage ;;
	esac
done

[ -e "$log" ] ||
	: > "$log"
chmod 0640 "$log"
chgrp adm "$log"

# redirect output
exec 1>>"$log"
exec 2>/dev/null

echo "--- system stats for $date"
echo

for cmd in "${cmds[@]}"; do
	tool=${cmd/ */}
	if [ -x "$tool" ]; then
		echo "-> $cmd"
		$cmd
		echo
	fi
done

echo "--- end system stats for $date"

exit 0
