[gdm] Make the greeter a well-behaved session client

[Matthias Clasen <matthiasc src gnome org>]

commit 758666242f97ff02c826ee37f2965ac5a828402d
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Apr 27 11:23:15 2009 -0400

    Make the greeter a well-behaved session client
    
    Since the greeter registers with the session manager, it should also
    handle QueryEndSession and EndSession. This prevents the inhibit dialog
    from showing up when the user shuts down with the power button. Fixes
    bug 580189.
---
 gui/simple-greeter/greeter-main.c |   53 +++++++++++++++++++++++++++++++++++++
 1 files changed, 53 insertions(+), 0 deletions(-)

diff --git a/gui/simple-greeter/greeter-main.c b/gui/simple-greeter/greeter-main.c
index 051888d..7a80028 100644
--- a/gui/simple-greeter/greeter-main.c
+++ b/gui/simple-greeter/greeter-main.c
@@ -155,6 +155,46 @@ session_manager_connect (void)
         return (sm_proxy != NULL);
 }
 
+static void
+stop_cb (gpointer data)
+{
+        gtk_main_quit ();
+}
+
+static gboolean
+end_session_response (gboolean is_okay, const gchar *reason)
+{
+        gboolean ret;
+        GError *error = NULL;
+
+        ret = dbus_g_proxy_call (client_proxy, "EndSessionResponse",
+                                 &error,
+                                 G_TYPE_BOOLEAN, is_okay,
+                                 G_TYPE_STRING, reason,
+                                 G_TYPE_INVALID,
+                                 G_TYPE_INVALID);
+
+        if (!ret) {
+                g_warning ("Failed to send session response %s", error->message);
+                g_error_free (error);
+        }
+
+        return ret;
+}
+
+static void
+query_end_session_cb (guint flags, gpointer data)
+{
+        end_session_response (TRUE, NULL);
+}
+
+static void
+end_session_cb (guint flags, gpointer data)
+{
+        end_session_response (TRUE, NULL);
+        gtk_main_quit ();
+}
+
 static gboolean
 register_client (void)
 {
@@ -186,6 +226,19 @@ register_client (void)
                                                   SM_DBUS_NAME,
                                                   client_id,
                                                   SM_CLIENT_DBUS_INTERFACE);
+
+        dbus_g_proxy_add_signal (client_proxy, "Stop", G_TYPE_INVALID);
+        dbus_g_proxy_connect_signal (client_proxy, "Stop",
+                                     G_CALLBACK (stop_cb), NULL, NULL);
+
+        dbus_g_proxy_add_signal (client_proxy, "QueryEndSession", G_TYPE_UINT, G_TYPE_INVALID);
+        dbus_g_proxy_connect_signal (client_proxy, "QueryEndSession",
+                                     G_CALLBACK (query_end_session_cb), NULL, NULL);
+
+        dbus_g_proxy_add_signal (client_proxy, "EndSession", G_TYPE_UINT, G_TYPE_INVALID);
+        dbus_g_proxy_connect_signal (client_proxy, "EndSession",
+                                     G_CALLBACK (end_session_cb), NULL, NULL);
+
         g_unsetenv ("DESKTOP_AUTOSTART_ID");
 
         return TRUE;