#!/usr/bin/bash
#
#  Copyright 2022 Jan Grulich <jgrulich@redhat.com>
#
#  This 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 software 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 software; if not, write to the Free Software
#  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
#  USA.
#

USERSFILE="/etc/tigervnc/vncserver.users"

if [ $# -ne 1 ]; then
	echo "Syntax:" >&2
	echo "    $0 <display>" >&2
	exit 1
fi

if [ ! -f "${USERSFILE}" ]; then
	echo "Users file ${USERSFILE} missing" >&2
	exit 1
fi

DISPLAY="$1"

USER=`grep "^ *${DISPLAY}=" "${USERSFILE}" 2>/dev/null | head -1 | cut -d = -f 2- | sed 's/ *$//g'`

if [ -z "${USER}" ]; then
	echo "No user configured for display ${DISPLAY}" >&2
	exit 1
fi

USER_HOMEDIR=`getent passwd ${USER} | cut -f6 -d:`

if [ -z "${USER_HOMEDIR}" ]; then
	echo "Failed to get home directory for ${USER}" >&2
	exit 1
fi

if [ ! -d "${USER_HOMEDIR}/.vnc" ]; then
	exit 0
fi

MATCHPATHCON=`which matchpathcon`

if [ $? -eq 0 ]; then
	${MATCHPATHCON} -V "${USER_HOMEDIR}/.vnc" &>/dev/null
	if [ $? -eq 0 ]; then
		exit 0
	fi
fi

RESTORECON=`which restorecon`

if [ $? -eq 0 ]; then
	exec "${RESTORECON}" -R "${USER_HOMEDIR}/.vnc" >&2
	return $?
fi