mirror of
https://github.com/jlu5/PyLink.git
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123 lines
4.3 KiB
Python
123 lines
4.3 KiB
Python
"""
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control.py - Implements SHUTDOWN and REHASH functionality.
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"""
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import signal
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import os
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import threading
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import sys
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from pylinkirc import world, utils, conf, classes
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from pylinkirc.log import log, makeFileLogger, stopFileLoggers, stdoutLogLevel
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from . import permissions
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tried_shutdown = False
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def remove_network(ircobj):
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"""Removes a network object from the pool."""
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# Disable autoconnect first by setting the delay negative.
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ircobj.serverdata['autoconnect'] = -1
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ircobj.disconnect()
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del world.networkobjects[ircobj.name]
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def _shutdown(irc=None):
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"""Shuts down the Pylink daemon."""
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global tried_shutdown
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if tried_shutdown: # We froze on shutdown last time, so immediately abort.
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sys.exit(1)
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tried_shutdown = True
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for name, plugin in world.plugins.items():
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# Before closing connections, tell all plugins to shutdown cleanly first.
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if hasattr(plugin, 'die'):
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log.debug('coremods.control: Running die() on plugin %s due to shutdown.', name)
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try:
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plugin.die(irc)
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except: # But don't allow it to crash the server.
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log.exception('coremods.control: Error occurred in die() of plugin %s, skipping...', name)
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# Remove our main PyLink bot as well.
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utils.unregisterService('pylink')
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for ircobj in world.networkobjects.copy().values():
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# Disconnect all our networks.
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remove_network(ircobj)
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# Remove our pid file.
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log.info("Removing our pid.")
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try:
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os.remove("%s.pid" % conf.confname)
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except OSError:
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log.exception("Failed to remove PID, ignoring...")
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log.info("Waiting for remaining threads to stop; this may take a few seconds. If PyLink freezes "
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"at this stage, press Ctrl-C to force a shutdown.")
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log.debug('_shutdown(): Remaining threads: %s', ['%s/%s' % (t.name, t.ident) for t in threading.enumerate()])
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# Done.
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def sigterm_handler(signo, stack_frame):
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"""Handles SIGTERM and SIGINT gracefully by shutting down the PyLink daemon."""
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log.info("Shutting down on signal %s." % signo)
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_shutdown()
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signal.signal(signal.SIGTERM, sigterm_handler)
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signal.signal(signal.SIGINT, sigterm_handler)
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def _rehash():
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"""Rehashes the PyLink daemon."""
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old_conf = conf.conf.copy()
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fname = conf.fname
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new_conf = conf.loadConf(fname, errors_fatal=False, logger=log)
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new_conf = conf.validateConf(new_conf)
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conf.conf = new_conf
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# Reset any file logger options.
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stopFileLoggers()
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files = new_conf['logging'].get('files')
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if files:
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for filename, config in files.items():
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makeFileLogger(filename, config.get('loglevel'))
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log.debug('rehash: updating STDOUT log level')
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world.stdout_handler.setLevel(stdoutLogLevel())
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# Reset permissions.
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log.debug('rehash: resetting permissions')
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permissions.resetPermissions()
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for network, ircobj in world.networkobjects.copy().items():
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# Server was removed from the config file, disconnect them.
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log.debug('rehash: checking if %r is in new conf still.', network)
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if network not in new_conf['servers']:
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log.debug('rehash: removing connection to %r (removed from config).', network)
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remove_network(ircobj)
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else:
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ircobj.conf = new_conf
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ircobj.serverdata = new_conf['servers'][network]
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ircobj.botdata = new_conf['bot']
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# Clear the IRC object's channel loggers and replace them with
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# new ones by re-running logSetup().
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while ircobj.loghandlers:
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log.removeHandler(ircobj.loghandlers.pop())
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ircobj.logSetup()
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# TODO: update file loggers here too.
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for network, sdata in new_conf['servers'].items():
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# Connect any new networks or disconnected networks if they aren't already.
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if (network not in world.networkobjects) or (not world.networkobjects[network].connection_thread.is_alive()):
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proto = utils.getProtocolModule(sdata['protocol'])
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world.networkobjects[network] = classes.Irc(network, proto, new_conf)
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if os.name == 'posix':
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# Only register SIGHUP on *nix.
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def sighup_handler(_signo, _stack_frame):
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"""Handles SIGHUP by rehashing the PyLink daemon."""
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log.info("SIGHUP received, reloading config.")
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_rehash()
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signal.signal(signal.SIGHUP, sighup_handler)
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