From f8f9beb6a3bf81240d36bfec43e5db9b102ea91e Mon Sep 17 00:00:00 2001
From: Martin Pitt <martinpitt@gnome.org>
Date: Wed, 1 May 2013 10:55:49 -0700
Subject: [PATCH] Lock screen on suspend

Listen for logind's PrepareForSleep signal, and lock the screen (if configured
to do so). This mirrors what gnome-shell's screensaver does.
---
 src/gs-listener-dbus.c | 28 ++++++++++++++++++++++++++++
 src/gs-listener-dbus.h |  1 +
 src/gs-monitor.c       | 20 ++++++++++++++++++++
 3 files changed, 49 insertions(+)

diff --git a/src/gs-listener-dbus.c b/src/gs-listener-dbus.c
index 7f718fa..49586fd 100644
--- a/src/gs-listener-dbus.c
+++ b/src/gs-listener-dbus.c
@@ -871,6 +872,17 @@ listener_dbus_handle_system_message (DBusConnection *connection,
                         }
 
                         return DBUS_HANDLER_RESULT_HANDLED;
+                } else if (dbus_message_is_signal (message, SYSTEMD_LOGIND_INTERFACE, "PrepareForSleep")) {
+                        gboolean active;
+                        if (dbus_message_get_args (message, NULL,
+                                    DBUS_TYPE_BOOLEAN, &active,
+                                    DBUS_TYPE_INVALID) && active) {
+                                gs_debug ("systemd notified that system is about to sleep");
+                                g_signal_emit (listener, signals [LOCK], 0, "");
+                        } else {
+                                gs_debug ("cannot parse PrepareForSleep");
+                        }
+                        return DBUS_HANDLER_RESULT_HANDLED;
                 } else if (dbus_message_is_signal (message, DBUS_INTERFACE_PROPERTIES, "PropertiesChanged")) {
 
                         if (_listener_message_path_is_our_session (listener, message)) {
@@ -1370,6 +1392,12 @@ gs_listener_acquire (GSListener *listener,
                                             ",interface='"DBUS_INTERFACE_PROPERTIES"'"
                                             ",member='PropertiesChanged'",
                                             NULL);
+                        dbus_bus_add_match (listener->priv->system_connection,
+                                            "type='signal'"
+                                            ",sender='"SYSTEMD_LOGIND_SERVICE"'"
+                                            ",interface='"SYSTEMD_LOGIND_INTERFACE"'"
+                                            ",member='PrepareForSleep'",
+                                            NULL);
 
                         return (res != -1);
                 }
-- 
1.8.1.2

