[kparal] logind suspend support. Fixes #7319

src/gui_interface.py

@@ -2833,6 +2833,7 @@ class Interface:
 
         if dbus_support.supported:
             import upower_listener
+            import logind_listener
 
         # Handle gnome screensaver
         if dbus_support.supported:

src/logind_listener.py

@@ -0,0 +1,114 @@
+## src/logind_listener.py
+##
+## Copyright (C) 2013 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")