#!/bin/bash

# Copyright (C) 2007-2018 X2Go Project - https://wiki.x2go.org
#
# 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 St, Fifth Floor, Boston, MA 02110-1301, USA.
#
# Copyright (C) 2011-2018 Oleksandr Shneyder <o.shneyder@phoca-gmbh.de>
# Copyright (C) 2011-2018 Heinz-Markus Graesing <heinz-m.graesing@obviously-nice.de>
# Copyright (C) 2011-2015 Mike Gabriel <mike.gabriel@das-netzwerkteam.de>

if [ "${#}" -eq '1' ]; then
	SESSION_NAME="${1}"
else
	SESSION_NAME="${X2GO_SESSION}"
fi

X2GO_LIB_PATH="$(x2gopath 'libexec')"

if type -p 'pidof' 1>'/dev/null' 2>'/dev/null'; then
	PIDOF='pidof'
elif [ -x '/usr/local/sbin/pidof' ]; then
	PIDOF='/usr/local/sbin/pidof'
elif [ -x '/usr/sbin/pidof' ]; then
	PIDOF='/usr/sbin/pidof'
elif [ -x '/sbin/pidof' ]; then
	PIDOF='/sbin/pidof'
else
	# no pidof utility found, get out the big hammer!!!
	killall 'x2godesktopsharing'
	exit '0'
fi

"${X2GO_LIB_PATH}/x2gosyslog" "${0}" 'info' "$(basename "${0}") called with options: ${@}"


X2GO_DISPLAY="$(echo "${SESSION_NAME}" | cut -d '-' -f '2')"
for process_id in $("${PIDOF}" 'x2godesktopsharing'); do
	env_of_process="$(cat -A "/proc/${process_id}/environ")"
	env_of_process="${env_of_process//^@/\\n}"
	display="$(echo -e "${env_of_process}" | grep -E '^DISPLAY=.*$' | cut -d '=' -f '2')"
	if echo "${display}" | grep ":${X2GO_DISPLAY}" &>'/dev/null'; then
		kill -SIGTERM "${process_id}"
		exit '0'
	fi
done

exit '1'
