[gnome-session] gsm: Support disable-user-switching lockdown setting in logout dialog

[Vincent Untz <vuntz src gnome org>]

commit fa30b73948c50c2493e19565b4e3b14b40f985e1
Author: Vincent Untz <vuntz gnome org>
Date:   Tue Mar 22 19:11:49 2011 +0100

    gsm: Support disable-user-switching lockdown setting in logout dialog
    
    https://bugzilla.gnome.org/show_bug.cgi?id=598255

 gnome-session/gsm-logout-dialog.c |   15 ++++++++++++---
 1 files changed, 12 insertions(+), 3 deletions(-)
---
diff --git a/gnome-session/gsm-logout-dialog.c b/gnome-session/gsm-logout-dialog.c
index 8def606..c66d5c4 100644
--- a/gnome-session/gsm-logout-dialog.c
+++ b/gnome-session/gsm-logout-dialog.c
@@ -40,6 +40,9 @@
 /* Shared with gsm-fail-whale-dialog.c */
 #define AUTOMATIC_ACTION_TIMEOUT 60
 
+#define LOCKDOWN_SCHEMA            "org.gnome.desktop.lockdown"
+#define KEY_DISABLE_USER_SWITCHING "disable-user-switching"
+
 typedef enum {
         GSM_DIALOG_LOGOUT_TYPE_LOGOUT,
         GSM_DIALOG_LOGOUT_TYPE_SHUTDOWN
@@ -193,9 +196,16 @@ gsm_logout_supports_system_hibernate (GsmLogoutDialog *logout_dialog)
 static gboolean
 gsm_logout_supports_switch_user (GsmLogoutDialog *logout_dialog)
 {
-        gboolean ret;
+        GSettings *settings;
+        gboolean   ret;
 
-        ret = gsm_consolekit_can_switch_user (logout_dialog->priv->consolekit);
+        settings = g_settings_new (LOCKDOWN_SCHEMA);
+        if (g_settings_get_boolean (settings, KEY_DISABLE_USER_SWITCHING))
+                ret = FALSE;
+        g_object_unref (settings);
+
+        if (ret)
+                ret = gsm_consolekit_can_switch_user (logout_dialog->priv->consolekit);
 
         return ret;
 }
@@ -219,7 +229,6 @@ gsm_logout_supports_shutdown (GsmLogoutDialog *logout_dialog)
         gboolean ret;
 
         ret = gsm_consolekit_can_stop (logout_dialog->priv->consolekit);
-
         if (!ret) {
                 ret = gdm_supports_logout_action (GDM_LOGOUT_ACTION_SHUTDOWN);
         }