#!/usr/bin/env python3 # # Copyright (C) 2022 VyOS maintainers and contributors # # 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 json from pathlib import Path from vyos.config import Config from vyos.utils.dict import dict_search from vyos.utils.process import call from vyos import ConfigError from vyos import airbag airbag.enable() service_name = 'vyos-event-handler' service_conf = Path(f'/run/{service_name}.conf') def get_config(config=None): if config: conf = config else: conf = Config() base = ['service', 'event-handler', 'event'] config = conf.get_config_dict(base, get_first_key=True, no_tag_node_value_mangle=True) return config def verify(config): # bail out early - looks like removal from running config if not config: return None for name, event_config in config.items(): if not dict_search('filter.pattern', event_config) or not dict_search( 'script.path', event_config): raise ConfigError( 'Event-handler: both pattern and script path items are mandatory' ) if dict_search('script.environment.message', event_config): raise ConfigError( 'Event-handler: "message" environment variable is reserved for log message text' ) def generate(config): if not config: # Remove old config and return service_conf.unlink(missing_ok=True) return None # Write configuration file conf_json = json.dumps(config, indent=4) service_conf.write_text(conf_json) return None def apply(config): if config: call(f'systemctl restart {service_name}.service') else: call(f'systemctl stop {service_name}.service') if __name__ == '__main__': try: c = get_config() verify(c) generate(c) apply(c) except ConfigError as e: print(e) exit(1)