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#!/usr/bin/env python3
#
# Copyright 2020 VyOS maintainers and contributors <maintainers@vyos.io>
#
# 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
import vyos.defaults
from jinja2 import FileSystemLoader, Environment
from sys import exit
from vyos.config import Config
from vyos import ConfigError
lcdd_conf = '/run/LCDd/LCDd.conf'
lcdproc_conf = '/run/lcdproc/lcdproc.conf'
def get_config():
base = 'system lcd'
conf = Config()
lcd = {}
if conf.exists(base):
conf.set_level(base)
if conf.exists('device'):
tmp = conf.return_value('device')
lcd.update({'device' : tmp})
if conf.exists('model'):
tmp = conf.return_value('model')
lcd.update({'model' : tmp})
# Return (possibly empty) dictionary
return lcd
def verify(lcd):
if not lcd:
return None
if 'model' in lcd and lcd['model'] in ['sdec']:
# This is a fixed LCD display, no device needed - bail out early
return None
if not {'device', 'model'} <= set(lcd):
raise ConfigError('Both device and driver must be set!')
return None
def generate(lcd):
if not lcd:
return None
if 'device' in lcd:
lcd['device'] = '/dev/' + lcd['device']
tmpl_path = os.path.join(vyos.defaults.directories['data'], 'templates')
fs_loader = FileSystemLoader(tmpl_path)
env = Environment(loader=fs_loader)
# create configuration directories
for file in [lcdd_conf, lcdproc_conf]:
path = os.path.dirname(file)
if not os.path.isdir(path):
os.mkdir(path, mode=0o755)
lcdd_conf_tmpl = env.get_template('lcd/LCDd.conf.tmpl')
tmp = lcdd_conf_tmpl.render(lcd)
with open(lcdd_conf, 'w') as f:
f.write(tmp)
lcdproc_conf_tmpl = env.get_template('lcd/lcdproc.conf.tmpl')
tmp = lcdproc_conf_tmpl.render(lcd)
with open(lcdproc_conf, 'w') as f:
f.write(tmp)
return None
def apply(lcd):
if not lcd:
os.system('sudo systemctl stop lcdproc.service LCDd.service')
for file in [lcdd_conf, lcdproc_conf]:
if os.path.exists(file):
os.remove(file)
else:
# Restart server
os.system('sudo systemctl restart LCDd.service lcdproc.service')
return None
if __name__ == '__main__':
try:
c = get_config()
verify(c)
generate(c)
apply(c)
except ConfigError as e:
print(e)
exit(1)
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