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## src/logind_listener.py
##
## 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 suspend using systemd-logind.
Documentation: http://www.freedesktop.org/wiki/Software/systemd/inhibit
'''
import os
import logging
from common import dbus_support
from common import gajim
log = logging.getLogger('gajim.logind_listener')
supported = False
fd = -1 # file descriptor of the inhibitor; negative number means we don't
# hold any (yet)
def on_suspend(active):
'''Signal handler for suspend event'''
global fd
if not active:
# we just resumed, we should take another inhibitor
get_inhibitor()
return
# we're going for suspend, let's disconnect
log.debug('System suspend detected, disconnecting from network...')
for name, conn in gajim.connections.items():
if gajim.account_is_connected(name):
conn.old_show = gajim.SHOW_LIST[conn.connected]
st = conn.status
conn.change_status('offline', _('Machine going to sleep'))
conn.status = st
conn.time_to_reconnect = 5
# close the file descriptor and let the computer suspend
if fd >= 0:
os.close(fd)
fd = -1;
else:
# something is wrong, the system is suspending but we don't have
# a lock file
log.warning("System suspend detected, but we don't seem to be holding "
"a file descriptor for sleep inihibitor")
def get_inhibitor():
'''Ask for a suspend delay inhibitor'''
from common.dbus_support import system_bus, dbus
bus = system_bus.bus()
global fd
if fd >= 0:
# someting is wrong, we haven't closed the previous file descriptor
# and we ask for yet another one
log.warning('We are about to ask for a sleep inhibitor, but we seem '
'to be holding one already')
login_object = bus.get_object('org.freedesktop.login1',
'/org/freedesktop/login1')
login_manager = dbus.Interface(login_object,
'org.freedesktop.login1.Manager')
ret = login_manager.Inhibit('sleep', 'Gajim', 'Disconnect from the network',
'delay')
fd = ret.take()
def set_listener():
'''Set up a listener for suspend signals
@return bool whether it succeeded
'''
from common.dbus_support import system_bus
bus = system_bus.bus()
if not 'org.freedesktop.login1' in bus.list_names():
# logind is not present
log.debug("logind is not on D-Bus, not activating logind listener")
return False
bus.add_signal_receiver(on_suspend, signal_name='PrepareForSleep',
bus_name='org.freedesktop.login1',
path='/org/freedesktop/login1',
dbus_interface='org.freedesktop.login1.Manager')
return True
if dbus_support.supported:
try:
if set_listener():
get_inhibitor()
supported = True
except Exception as ex:
log.error("A problem occured while activating logind listener")
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