gajim-plural/gajim/common/dbus/logind.py

136 lines
4.7 KiB
Python

# Copyright (C) 2014 Kamil Paral <kamil.paral AT gmail.com>
#
# This file is part of Gajim.
#
# Gajim 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; version 3 only.
#
# Gajim 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 Gajim. If not, see <http://www.gnu.org/licenses/>.
'''
Watch for system sleep using systemd-logind.
Documentation: http://www.freedesktop.org/wiki/Software/systemd/inhibit
'''
import os
import logging
from gi.repository import Gio
from gi.repository import GLib
from gajim.common import app
from gajim.common.i18n import _
log = logging.getLogger('gajim.c.dbus.logind')
class LogindListener:
_instance = None
@classmethod
def get(cls):
if cls._instance is None:
cls._instance = cls()
return cls._instance
def __init__(self):
# file descriptor object of the inhibitor
self._inhibit_fd = None
Gio.bus_watch_name(
Gio.BusType.SYSTEM,
'org.freedesktop.login1',
Gio.BusNameWatcherFlags.NONE,
self._on_appear_logind,
self._on_vanish_logind)
def _on_prepare_for_sleep(self, connection, _sender_name, _object_path,
interface_name, signal_name, parameters,
*_user_data):
'''Signal handler for PrepareForSleep event'''
log.debug('Received signal %s.%s%s', interface_name, signal_name, parameters)
before = parameters[0] # Signal is either before or after sleep occurs
if before:
warn = self._inhibit_fd is None
log.log(
logging.WARNING if warn else logging.INFO,
'Preparing for sleep by disconnecting from network%s',
', without holding a sleep inhibitor' if warn else '')
for name, conn in app.connections.items():
if app.account_is_connected(name):
conn.old_show = app.SHOW_LIST[conn.connected]
st = conn.status
conn.change_status('offline', _('Machine is going to sleep'))
conn.status = st
conn.time_to_reconnect = 5
self._disinhibit_sleep()
else:
self._inhibit_sleep(connection)
for conn in app.connections.values():
if conn.connected <= 0 and conn.time_to_reconnect:
conn.reconnect()
def _inhibit_sleep(self, connection):
'''Obtain a sleep delay inhibitor from logind'''
if self._inhibit_fd is not None:
# Something is wrong, we have an inhibitor fd, and we are asking for
# yet another one.
log.warning('Trying to obtain a sleep inhibitor '
'while already holding one.')
ret, ret_fdlist = connection.call_with_unix_fd_list_sync(
'org.freedesktop.login1',
'/org/freedesktop/login1',
'org.freedesktop.login1.Manager',
'Inhibit',
GLib.Variant('(ssss)', (
'sleep', 'org.gajim.Gajim', _('Disconnect from the network'),
'delay' # Inhibitor will delay but not block sleep
)),
GLib.VariantType.new('(h)'),
Gio.DBusCallFlags.NONE, -1, None, None)
log.info('Inhibit sleep')
self._inhibit_fd = ret_fdlist.get(ret.unpack()[0])
def _disinhibit_sleep(self):
'''Relinquish our sleep delay inhibitor'''
if self._inhibit_fd is not None:
os.close(self._inhibit_fd)
self._inhibit_fd = None
log.info('Disinhibit sleep')
def _on_appear_logind(self, connection, name, name_owner, *_user_data):
'''Use signal and locks provided by org.freedesktop.login1'''
log.info('Name %s appeared, owned by %s', name, name_owner)
connection.signal_subscribe(
'org.freedesktop.login1',
'org.freedesktop.login1.Manager',
'PrepareForSleep',
'/org/freedesktop/login1',
None,
Gio.DBusSignalFlags.NONE,
self._on_prepare_for_sleep,
None)
self._inhibit_sleep(connection)
def _on_vanish_logind(self, _connection, name, *_user_data):
'''Release remaining resources related to org.freedesktop.login1'''
log.info('Name %s vanished', name)
self._disinhibit_sleep()
def enable():
LogindListener.get()