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#!/usr/bin/env python3
#
# Copyright (C) 2020 Francois Mertz fireboxled at gmail.com
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# 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, see <http://www.gnu.org/licenses/>.
import os
from sys import exit
from vyos.config import Config
from vyos import ConfigError
from vyos.util import run
from vyos.template import render
from vyos import airbag
airbag.enable()
def get_config():
conf = Config()
base = ['system', 'display']
display = conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True)
# Return a (possibly empty) configuration dictionary
return display
def verify(config_dict):
if not config_dict:
return None
if 'model' not in config_dict:
raise ConfigError('Display model is [REQUIRED]')
if ( 'show' not in config_dict
or ( 'clock' not in config_dict['show']
and 'network' not in config_dict['show']
and 'host' not in config_dict['show']
)
):
raise ConfigError('Display show must have a clock, host or network')
if ( 'network' in config_dict['show']
and 'interface' not in config_dict['show']['network']
):
raise ConfigError('Display show network must have an interface')
if ( 'network' in config_dict['show']
and 'interface' in config_dict['show']['network']
and len(config_dict['show']['network']['interface']) > 3
):
raise ConfigError('Display show network cannot have > 3 interfaces')
return None
def generate(config_dict):
if not config_dict:
return None
# Render config file for daemon LCDd
render('/run/LCDd/LCDd.lo.conf', 'system-display/LCDd.conf.tmpl', config_dict)
# Render config file for client lcdproc
render('/run/lcdproc/lcdproc.lo.conf', 'system-display/lcdproc.conf.tmpl', config_dict)
return None
def apply(config_dict):
# Stop client
run('systemctl stop lcdproc@lo.service')
if not config_dict or 'disabled' in config_dict:
# Stop server
run('systemctl stop LCDd@lo.service')
return None
# Restart server
run('systemctl restart LCDd@lo.service')
# Start client
run('systemctl start lcdproc@lo.service')
return None
if __name__ == '__main__':
try:
config_dict = get_config()
verify(config_dict)
generate(config_dict)
apply(config_dict)
except ConfigError as e:
print(e)
exit(1)
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