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#include <dbus/dbus-glib.h>
#include "lock-helper.h"
static DBusGProxy * gss_proxy = NULL;
static GMainLoop * gss_mainloop = NULL;
static DBusGProxy * gdm_settings_proxy = NULL;
static gboolean gdm_auto_login = FALSE;
static const gchar * gdm_auto_login_string = "daemon/AutomaticLoginEnable";
static gboolean is_guest = FALSE;
static gdm_autologin_cb_t gdm_autologin_cb = NULL;
/* Setting up a call back */
void
lock_screen_gdm_cb_set (gdm_autologin_cb_t cb)
{
if (gdm_autologin_cb) {
g_warning("Already had a callback, setting up a new one...");
}
gdm_autologin_cb = cb;
return;
}
/* This is our logic on whether the screen should be locked
or not. It effects everything else. */
gboolean
will_lock_screen (void)
{
if (gdm_auto_login) {
return FALSE;
}
if (is_guest) {
return FALSE;
}
return TRUE;
}
/* Respond to the signal of autologin changing to see if the
setting for timed login changes. */
static void
gdm_settings_change (DBusGProxy * proxy, const gchar * value, const gchar * old, const gchar * new, gpointer data)
{
if (g_strcmp0(value, gdm_auto_login_string)) {
/* This is not a setting that we care about,
there is only one. */
return;
}
g_debug("GDM Settings change: %s", new);
if (g_strcmp0(new, "true") == 0) {
gdm_auto_login = TRUE;
} else {
gdm_auto_login = FALSE;
}
if (gdm_autologin_cb != NULL) {
gdm_autologin_cb();
}
return;
}
/* Get back the data from querying to see if there is auto
login enabled in GDM */
static void
gdm_get_autologin (DBusGProxy * proxy, DBusGProxyCall * call, gpointer data)
{
GError * error = NULL;
gchar * value = NULL;
if (!dbus_g_proxy_end_call(proxy, call, &error, G_TYPE_STRING, &value, G_TYPE_INVALID)) {
g_warning("Unable to get autologin setting: %s", error != NULL ? error->message : "null");
g_error_free(error);
return;
}
g_return_if_fail(value != NULL);
gdm_settings_change(proxy, gdm_auto_login_string, NULL, value, NULL);
return;
}
/* Sets up the proxy and queries for the setting to know
whether we're doing an autologin. */
static void
build_gdm_proxy (void)
{
g_return_if_fail(gdm_settings_proxy == NULL);
/* Grab the system bus */
DBusGConnection * bus = dbus_g_bus_get(DBUS_BUS_SYSTEM, NULL);
g_return_if_fail(bus != NULL);
/* Get the settings proxy */
gdm_settings_proxy = dbus_g_proxy_new_for_name_owner(bus,
"org.gnome.DisplayManager",
"/org/gnome/DisplayManager/Settings",
"org.gnome.DisplayManager.Settings", NULL);
g_return_if_fail(gdm_settings_proxy != NULL);
/* Signal for value changed */
dbus_g_proxy_add_signal(gdm_settings_proxy,
"ValueChanged",
G_TYPE_STRING,
G_TYPE_STRING,
G_TYPE_STRING,
G_TYPE_INVALID);
dbus_g_proxy_connect_signal(gdm_settings_proxy,
"ValueChanged",
G_CALLBACK(gdm_settings_change),
NULL,
NULL);
/* Start to get the initial value */
dbus_g_proxy_begin_call(gdm_settings_proxy,
"GetValue",
gdm_get_autologin,
NULL,
NULL,
G_TYPE_STRING,
gdm_auto_login_string,
G_TYPE_INVALID);
return;
}
/* When the screensave go active, if we've got a mainloop
running we should quit it. */
static void
gss_active_changed (DBusGProxy * proxy, gboolean active, gpointer data)
{
if (active && gss_mainloop != NULL) {
g_main_loop_quit(gss_mainloop);
}
return;
}
/* Build the gss proxy and set up it's signals */
void
build_gss_proxy (void)
{
DBusGConnection * session_bus = dbus_g_bus_get(DBUS_BUS_SESSION, NULL);
g_return_if_fail(session_bus != NULL);
gss_proxy = dbus_g_proxy_new_for_name_owner(session_bus,
"org.gnome.ScreenSaver",
"/",
"org.gnome.ScreenSaver",
NULL);
g_return_if_fail(gss_proxy != NULL);
dbus_g_proxy_add_signal(gss_proxy, "ActiveChanged", G_TYPE_BOOLEAN, G_TYPE_INVALID);
dbus_g_proxy_connect_signal(gss_proxy, "ActiveChanged", G_CALLBACK(gss_active_changed), NULL, NULL);
return;
}
/* This is a timeout, we only want to wait for the screen to
lock for a little bit, but not forever. */
static gboolean
activate_timeout (gpointer data)
{
guint * address = (guint *)data;
*address = 0;
if (gss_mainloop != NULL) {
g_main_loop_quit(gss_mainloop);
}
return FALSE;
}
/* A fun little function to actually lock the screen. If,
that's what you want, let's do it! */
void
lock_screen (DbusmenuMenuitem * mi, gpointer data)
{
g_debug("Lock Screen");
if (!will_lock_screen()) {
g_debug("\tGDM set to autologin, blocking lock");
return;
}
g_return_if_fail(gss_proxy != NULL);
dbus_g_proxy_call_no_reply(gss_proxy,
"Lock",
G_TYPE_INVALID,
G_TYPE_INVALID);
if (gss_mainloop == NULL) {
gss_mainloop = g_main_loop_new(NULL, FALSE);
}
guint timer = g_timeout_add_seconds(1, activate_timeout, &timer);
g_main_loop_run(gss_mainloop);
if (timer != 0) {
g_source_remove(timer);
}
return;
}
/* Do what it takes to make the lock screen function work
and be happy. */
gboolean
lock_screen_setup (gpointer data)
{
if (!g_strcmp0(g_get_user_name(), "guest")) {
is_guest = TRUE;
}
build_gdm_proxy();
build_gss_proxy();
return FALSE;
}
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