Implement ulock

11 files changed, 851 insertions, 4 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 14fab01..da56d2a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,12 +1,41 @@
 project(ULOCK C)
 cmake_minimum_required(VERSION 2.8)
 
+set(CMAKE_MODULE_PATH ${ULOCK_SOURCE_DIR})
+
+find_package(Gettext REQUIRED)
+
+find_package(PAM REQUIRED)
+
 find_package(PkgConfig REQUIRED)
 pkg_check_modules(GTK3 REQUIRED gtk+-x11-3.0)
+pkg_check_modules(GDK3 REQUIRED gdk-x11-3.0)
+pkg_check_modules(X11 REQUIRED x11)
+
+set(CMAKE_THREAD_PREFER_PTHREAD TRUE)
+find_package(Threads)
+if(NOT CMAKE_USE_PTHREADS_INIT)
+  MESSAGE(FATAL_ERROR "No pthread support found.")
+endif(NOT CMAKE_USE_PTHREADS_INIT)
+
+
+set(CONFIG_DIR "/etc" CACHE STRING "Path to install ulock's configuration file to")
+set(DATA_DIR "share/ulock" CACHE STRING "Path to install ulock's data files to")
 
-include_directories(${GTK3_INCLUDE_DIRS})
+
+include_directories(${ULOCK_BINARY_DIR} ${GTK3_INCLUDE_DIRS} ${GDK3_INCLUDE_DIRS} ${X11_INCLUDE_DIRS} ${PAM_INCLUDE_DIR})
+
+configure_file(${ULOCK_SOURCE_DIR}/config.h.in ${ULOCK_BINARY_DIR}/config.h)
 
 add_executable(ulock ulock.c)
-set_property(TARGET ulock PROPERTY COMPILE_FLAGS "-Wall ${GTK3_CFLAGS_OTHER}")
-set_property(TARGET ulock PROPERTY LINK_FLAGS "${GTK3_LDFLAGS_OTHER}")
-target_link_libraries(ulock ${GTK3_LIBRARIES})
+set_property(TARGET ulock PROPERTY COMPILE_FLAGS "-Wall -pthread ${GTK3_CFLAGS_OTHER} ${GDK3_CFLAGS_OTHER} ${X11_CFLAGS_OTHER}")
+set_property(TARGET ulock PROPERTY LINK_FLAGS "-pthread ${GTK3_LDFLAGS_OTHER} ${GDK3_LDFLAGS_OTHER} ${X11_LDFLAGS_OTHER}")
+target_link_libraries(ulock ${GTK3_LIBRARIES} ${GDK3_LIBRARIES} ${X11_LIBRARIES} ${PAM_LIBRARY})
+
+GETTEXT_PROCESS_PO_FILES(de ALL PO_FILES po/de.po)
+
+install(TARGETS ulock RUNTIME DESTINATION bin)
+install(DIRECTORY data/ DESTINATION ${DATA_DIR})
+install(FILES etc/ulock.conf DESTINATION ${CONFIG_DIR})
+
+install(FILES ${ULOCK_BINARY_DIR}/de.gmo DESTINATION share/locale/de/LC_MESSAGES RENAME ulock.mo)
diff --git a/FindPAM.cmake b/FindPAM.cmake
new file mode 100644
index 0000000..f324670
--- /dev/null
+++ b/FindPAM.cmake
@@ -0,0 +1,16 @@
+FIND_PATH(PAM_INCLUDE_DIR security/pam_appl.h)
+FIND_LIBRARY(PAM_LIBRARY NAMES pam)
+
+IF (PAM_INCLUDE_DIR AND PAM_LIBRARY)
+   SET(PAM_FOUND TRUE)
+ENDIF (PAM_INCLUDE_DIR AND PAM_LIBRARY)
+
+IF (PAM_FOUND)
+   IF (NOT PAM_FIND_QUIETLY)
+      MESSAGE(STATUS "Found PAM: ${PAM_LIBRARY}; include path: ${PAM_INCLUDE_DIR}")
+   ENDIF (NOT PAM_FIND_QUIETLY)
+ELSE (PAM_FOUND)
+   IF (PAM_FIND_REQUIRED)
+      MESSAGE(FATAL_ERROR "Could not find PAM")
+   ENDIF (PAM_FIND_REQUIRED)
+ENDIF (PAM_FOUND)
diff --git a/config.h.in b/config.h.in
new file mode 100644
index 0000000..6f5e541
--- /dev/null
+++ b/config.h.in
@@ -0,0 +1,8 @@
+#ifndef _ULOCK_CONFIG_H_
+#define _ULOCK_CONFIG_H_
+
+#define CONFIG_FILE "@CONFIG_DIR@/ulock.conf"
+#define PREFIX "@CMAKE_INSTALL_PREFIX@"
+#define DATA_DIR "@CMAKE_INSTALL_PREFIX@/@DATA_DIR@"
+
+#endif /* _ULOCK_CONFIG_H_ */
diff --git a/data/bg.svg b/data/bg.svg
new file mode 100644
index 0000000..78e3972
--- /dev/null
+++ b/data/bg.svg
@@ -0,0 +1,208 @@
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diff --git a/data/siegel.png b/data/siegel.png
new file mode 100644
index 0000000..8b46a10
--- /dev/null
+++ b/data/siegel.png
diff --git a/data/unlock.ui b/data/unlock.ui
new file mode 100644
index 0000000..89bc3b8
--- /dev/null
+++ b/data/unlock.ui
@@ -0,0 +1,166 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <requires lib="gtk+" version="2.24"/>
+  <object class="GtkNotebook" id="unlock_window">
+    <property name="width_request">700</property>
+    <property name="visible">True</property>
+    <property name="can_focus">False</property>
+    <property name="halign">center</property>
+    <property name="valign">center</property>
+    <property name="show_tabs">False</property>
+    <child>
+      <object class="GtkHBox" id="box1">
+        <property name="visible">True</property>
+        <property name="can_focus">False</property>
+        <property name="spacing">40</property>
+        <child>
+          <object class="GtkImage" id="image1">
+            <property name="visible">True</property>
+            <property name="can_focus">False</property>
+            <property name="pixbuf">siegel.png</property>
+          </object>
+          <packing>
+            <property name="expand">False</property>
+            <property name="fill">True</property>
+            <property name="position">0</property>
+          </packing>
+        </child>
+        <child>
+          <object class="GtkVBox" id="vbox2">
+            <property name="visible">True</property>
+            <property name="can_focus">False</property>
+            <property name="border_width">12</property>
+            <property name="spacing">12</property>
+            <child>
+              <object class="GtkLabel" id="lock_label">
+                <property name="visible">True</property>
+                <property name="can_focus">False</property>
+                <property name="label" comments="This is a placeholder string and will be replaced with the hostname of the system">[lock]</property>
+              </object>
+              <packing>
+                <property name="expand">True</property>
+                <property name="fill">True</property>
+                <property name="position">1</property>
+              </packing>
+            </child>
+            <child>
+              <object class="GtkVBox" id="login_box">
+                <property name="can_focus">False</property>
+                <property name="spacing">6</property>
+                <child>
+                  <object class="GtkHBox" id="prompt_box">
+                    <property name="can_focus">False</property>
+                    <property name="spacing">6</property>
+                    <child>
+                      <object class="GtkLabel" id="prompt_label">
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <property name="label" translatable="yes">Password:</property>
+                      </object>
+                      <packing>
+                        <property name="expand">False</property>
+                        <property name="fill">True</property>
+                        <property name="position">0</property>
+                      </packing>
+                    </child>
+                    <child>
+                      <object class="GtkEntry" id="prompt_entry">
+                        <property name="visible">True</property>
+                        <property name="can_focus">True</property>
+                        <property name="visibility">False</property>
+                        <property name="invisible_char">•</property>
+                        <property name="invisible_char_set">True</property>
+                        <property name="primary_icon_activatable">False</property>
+                        <property name="secondary_icon_activatable">False</property>
+                        <signal name="activate" handler="login_cb" swapped="no"/>
+                      </object>
+                      <packing>
+                        <property name="expand">True</property>
+                        <property name="fill">True</property>
+                        <property name="position">1</property>
+                      </packing>
+                    </child>
+                  </object>
+                  <packing>
+                    <property name="expand">True</property>
+                    <property name="fill">True</property>
+                    <property name="position">0</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkLabel" id="message_label">
+                    <property name="can_focus">False</property>
+                    <property name="yalign">0</property>
+                    <property name="label" comments="This is a placeholder string and will be replaced with a message from PAM">[message]</property>
+                  </object>
+                  <packing>
+                    <property name="expand">True</property>
+                    <property name="fill">True</property>
+                    <property name="position">1</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkHBox" id="hbox2">
+                    <property name="visible">True</property>
+                    <property name="can_focus">False</property>
+                    <property name="spacing">20</property>
+                    <child>
+                      <object class="GtkButton" id="unlock_button">
+                        <property name="label" translatable="yes">Unlock</property>
+                        <property name="use_action_appearance">False</property>
+                        <property name="visible">True</property>
+                        <property name="can_focus">True</property>
+                        <property name="receives_default">True</property>
+                        <property name="use_action_appearance">False</property>
+                      </object>
+                      <packing>
+                        <property name="expand">True</property>
+                        <property name="fill">True</property>
+                        <property name="pack_type">end</property>
+                        <property name="position">1</property>
+                      </packing>
+                    </child>
+                    <child>
+                      <object class="GtkButton" id="logout_button">
+                        <property name="label" translatable="yes">Logout</property>
+                        <property name="use_action_appearance">False</property>
+                        <property name="visible">True</property>
+                        <property name="can_focus">True</property>
+                        <property name="receives_default">True</property>
+                        <property name="use_action_appearance">False</property>
+                      </object>
+                      <packing>
+                        <property name="expand">True</property>
+                        <property name="fill">True</property>
+                        <property name="pack_type">end</property>
+                        <property name="position">2</property>
+                      </packing>
+                    </child>
+                  </object>
+                  <packing>
+                    <property name="expand">True</property>
+                    <property name="fill">True</property>
+                    <property name="position">2</property>
+                  </packing>
+                </child>
+              </object>
+              <packing>
+                <property name="expand">False</property>
+                <property name="fill">True</property>
+                <property name="position">3</property>
+              </packing>
+            </child>
+          </object>
+          <packing>
+            <property name="expand">False</property>
+            <property name="fill">True</property>
+            <property name="position">1</property>
+          </packing>
+        </child>
+      </object>
+    </child>
+    <child type="tab">
+      <placeholder/>
+    </child>
+  </object>
+</interface>
diff --git a/etc/ulock.conf b/etc/ulock.conf
new file mode 100644
index 0000000..920e278
--- /dev/null
+++ b/etc/ulock.conf
@@ -0,0 +1,4 @@
+[ulock]
+#theme=Adwaita
+#logout_timeout=600
+#logout_command=xfce4-session-logout -l
diff --git a/po/POTFILES.in b/po/POTFILES.in
new file mode 100644
index 0000000..def4168
--- /dev/null
+++ b/po/POTFILES.in
@@ -0,0 +1,3 @@
+[encoding: UTF-8]
+pylock.c
+[type: gettext/glade]data/unlock.ui
diff --git a/po/de.po b/po/de.po
new file mode 100644
index 0000000..108462a
--- /dev/null
+++ b/po/de.po
@@ -0,0 +1,49 @@
+# ulock german translation
+# Copyright (C) 2013 Matthias Schiffer
+# This file is distributed under the same license as the ulock package.
+# Matthias Schiffer <mschiffer@universe-factory.net>, 2013.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: pylock 0.1\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2013-09-19 18:53+0200\n"
+"PO-Revision-Date: 2012-02-01 19:30+0100\n"
+"Last-Translator: Matthias Schiffer <mschiffer@universe-factory.net>\n"
+"Language-Team: German <de@li.org>\n"
+"Language: de\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+
+#: data/unlock.ui:125
+msgid "Logout"
+msgstr "Ausloggen"
+
+#: data/unlock.ui:58
+msgid "Password:"
+msgstr "Passwort:"
+
+#: ulock.c:88
+msgid "This computer is currently locked by the user <i>%s</i>."
+msgstr "Dieser Computer ist zur Zeit vom Benutzer <i>%s</i> gesperrt."
+
+#: ulock.c:92
+msgid ""
+"This computer is currently locked by the user <i>%s</i>.\n"
+"The user can be logged out in %02u:%02u minutes."
+msgstr ""
+"Dieser Computer ist zur Zeit vom Benutzer <i>%s</i> gesperrt.\n"
+"Der Benutzer kann in %02u:%02u Minuten ausgeloggt werden."
+
+#: ulock.c:98
+msgid ""
+"This computer is currently locked by the user <i>%s</i>.\n"
+"The user can be logged out now."
+msgstr ""
+"Dieser Computer ist zur Zeit vom Benutzer <i>%s</i> gesperrt.\n"
+"Der Benutzer kann jetzt ausgeloggt werden."
+
+#: data/unlock.ui:109
+msgid "Unlock"
+msgstr "Entsperren"
diff --git a/po/ulock.pot b/po/ulock.pot
new file mode 100644
index 0000000..697554b
--- /dev/null
+++ b/po/ulock.pot
@@ -0,0 +1,49 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2013-09-19 18:53+0200\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=CHARSET\n"
+"Content-Transfer-Encoding: 8bit\n"
+
+#: ulock.c:88
+#, c-format
+msgid "This computer is currently locked by the user <i>%s</i>."
+msgstr ""
+
+#: ulock.c:92
+#, c-format
+msgid ""
+"This computer is currently locked by the user <i>%s</i>.\n"
+"The user can be logged out in %02u:%02u minutes."
+msgstr ""
+
+#: ulock.c:98
+#, c-format
+msgid ""
+"This computer is currently locked by the user <i>%s</i>.\n"
+"The user can be logged out now."
+msgstr ""
+
+#: data/unlock.ui:58
+msgid "Password:"
+msgstr ""
+
+#: data/unlock.ui:109
+msgid "Unlock"
+msgstr ""
+
+#: data/unlock.ui:125
+msgid "Logout"
+msgstr ""
diff --git a/ulock.c b/ulock.c
index e69de29..aaa1ecd 100644
--- a/ulock.c
+++ b/ulock.c
@@ -0,0 +1,315 @@
+#include <config.h>
+
+#include <sys/types.h>
+
+#include <locale.h>
+#include <libintl.h>
+#include <pthread.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+#include <unistd.h>
+
+#include <security/pam_appl.h>
+
+#include <gdk/gdk.h>
+#include <gdk/gdkx.h>
+#include <gtk/gtk.h>
+
+#include <X11/Xlib.h>
+
+
+#define _(s) gettext(s)
+#define DEBUG(args...) syslog(LOG_NOTICE, args)
+
+
+enum lock_state {
+	LOCKED, UNLOCKING, LOGOUT
+};
+
+
+static enum lock_state state = LOCKED;
+
+static GtkWidget *window, *unlockWindow, *lockLabel, *promptEntry, *messageLabel, *logoutButton, *unlockButton;
+static gboolean enablePromptEntry = TRUE, enableLogoutButton = FALSE, enableUnlockButton = TRUE;
+
+static char *username;
+static char *logoutCommand = NULL;
+static int logoutTime = 0;
+
+
+static gboolean do_grab_devices(gpointer user_data) {
+	DEBUG("do_grab_devices");
+
+	gtk_window_present(GTK_WINDOW(window));
+
+	GdkDeviceManager *deviceManager = gdk_display_get_device_manager(gdk_display_get_default());
+	GList *devices = gdk_device_manager_list_devices(deviceManager, GDK_DEVICE_TYPE_MASTER);
+
+	gboolean error = FALSE;
+
+	for (; devices; devices = g_list_next(devices)) {
+		GdkDevice *device = devices->data;
+
+		if (gdk_device_grab(device, gtk_widget_get_window(window), GDK_OWNERSHIP_APPLICATION, TRUE, GDK_ALL_EVENTS_MASK, NULL, GDK_CURRENT_TIME) != GDK_GRAB_SUCCESS)
+			error = TRUE;
+	}
+
+	g_list_free(devices);
+
+	return error;
+}
+
+static void grab_devices(void) {
+	if (do_grab_devices(NULL))
+		g_timeout_add_seconds(1, do_grab_devices, NULL);
+}
+
+static void update(void) {
+	gboolean locked = (state == LOCKED);
+
+	gtk_widget_set_sensitive(promptEntry, enablePromptEntry && locked);
+	gtk_widget_set_sensitive(logoutButton, enableLogoutButton && locked);
+	gtk_widget_set_sensitive(unlockButton, enableUnlockButton && locked);
+}
+
+static gboolean do_update_logout_time(gpointer user_data) {
+	gboolean ret = FALSE;
+	char *escaped_username = g_markup_escape_text(username, -1);
+	char *message;
+
+	if (!logoutCommand) {
+		message = g_strdup_printf(_("This computer is currently locked by the user <i>%s</i>."), escaped_username);
+		enableLogoutButton = FALSE;
+	}
+	else if (logoutTime > 0) {
+		message = g_strdup_printf(_("This computer is currently locked by the user <i>%s</i>.\nThe user can be logged out in %02u:%02u minutes."), escaped_username, logoutTime/60, logoutTime%60);
+		enableLogoutButton = FALSE;
+		ret = TRUE;
+		logoutTime--;
+	}
+	else {
+		message = g_strdup_printf(_("This computer is currently locked by the user <i>%s</i>.\nThe user can be logged out now."), escaped_username);
+		enableLogoutButton = TRUE;
+	}
+
+	gtk_label_set_markup(GTK_LABEL(lockLabel), message);
+	g_free(message);
+
+	update();
+
+	return ret;
+}
+
+static void update_logout_time() {
+	if (do_update_logout_time(NULL))
+		g_timeout_add_seconds(1, do_update_logout_time, NULL);
+}
+
+static void lock(void) {
+	if (state != LOCKED)
+		return;
+
+	DEBUG("lock");
+
+	update();
+	grab_devices();
+	gtk_widget_grab_focus(promptEntry);
+}
+
+static int ulock_conv(int num_msg, const struct pam_message **msg, struct pam_response **resp, void *appdata_ptr) {
+	char *password = appdata_ptr;
+
+	*resp = calloc(num_msg, sizeof(struct pam_response));
+	int i;
+	for (i = 0; i < num_msg; i++) {
+		if (msg[i]->msg_style == PAM_PROMPT_ECHO_OFF)
+			resp[i]->resp = strdup(password);
+	}
+
+	return 0;
+}
+
+static gboolean try_unlock_return(gpointer message) {
+	DEBUG("try_unlock_return");
+
+	if (message) {
+		state = LOCKED;
+		gtk_entry_set_text(GTK_ENTRY(promptEntry), "");
+		gtk_label_set_label(GTK_LABEL(messageLabel), message);
+		lock();
+	}
+	else {
+		gtk_main_quit();
+	}
+
+	return FALSE;
+}
+
+/* this thread must not access any GTK resources */
+static void* try_unlock_thread(void *arg) {
+	const struct pam_conv conv = {.conv = ulock_conv, .appdata_ptr = arg};
+
+	pam_handle_t *handle = NULL;
+	int ret = pam_start("login", username, &conv, &handle);
+
+	if (!ret)
+		ret = pam_authenticate(handle, 0);
+
+	const char *message = NULL;
+	if (ret)
+		message = pam_strerror(handle, ret);
+
+	pam_end(handle, ret);
+
+	g_idle_add(try_unlock_return, (gpointer)message);
+
+	free(arg);
+	return NULL;
+}
+
+static void try_unlock(void) {
+	if (state != LOCKED)
+		return;
+
+	DEBUG("try_unlock");
+
+	state = UNLOCKING;
+	update();
+	gtk_label_set_label(GTK_LABEL(messageLabel), "");
+
+	pthread_t thread;
+	pthread_create(&thread, NULL, try_unlock_thread, strdup((char*)gtk_entry_get_text(GTK_ENTRY(promptEntry))));
+	pthread_detach(thread);
+}
+
+static void logout(void) {
+	if (state != LOCKED)
+		return;
+
+	if (!logoutCommand)
+		return;
+
+	if (logoutTime > 0)
+		return;
+
+	DEBUG("logout");
+
+	state = LOGOUT;
+	update();
+
+	system(logoutCommand);
+}
+
+static GdkFilterReturn xevent_filter(GdkXEvent *xevent, GdkEvent *event, gpointer data) {
+	XEvent *ev = xevent;
+
+	switch (ev->xany.type) {
+	case MapNotify:
+	case ConfigureNotify:
+		if (ev->xany.window != gdk_x11_window_get_xid(gtk_widget_get_window(window)))
+			gtk_window_present(GTK_WINDOW(window));
+		break;
+
+	default:
+		break;
+	}
+
+	return GDK_FILTER_CONTINUE;
+}
+
+
+static void create_lock_window(void) {
+	window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
+
+	gtk_window_set_decorated(GTK_WINDOW(window), FALSE);
+	gtk_window_set_skip_taskbar_hint(GTK_WINDOW(window), TRUE);
+	gtk_window_set_skip_pager_hint(GTK_WINDOW(window), TRUE);
+	gtk_window_set_keep_above(GTK_WINDOW(window), TRUE);
+	gtk_window_fullscreen(GTK_WINDOW(window));
+
+	GtkWidget *overlay = gtk_overlay_new();
+	gtk_container_add(GTK_CONTAINER(window), overlay);
+
+	GtkWidget *bg = gtk_image_new_from_file(DATA_DIR "/bg.svg");
+	gtk_container_add(GTK_CONTAINER(overlay), bg);
+
+	GtkBuilder *builder = gtk_builder_new();
+
+	if (!gtk_builder_add_from_file(builder, DATA_DIR "/unlock.ui", NULL))
+		exit(1);
+
+	unlockWindow = GTK_WIDGET(gtk_builder_get_object(builder, "unlock_window"));
+	lockLabel = GTK_WIDGET(gtk_builder_get_object(builder, "lock_label"));
+	promptEntry = GTK_WIDGET(gtk_builder_get_object(builder, "prompt_entry"));
+	messageLabel = GTK_WIDGET(gtk_builder_get_object(builder, "message_label"));
+	logoutButton = GTK_WIDGET(gtk_builder_get_object(builder, "logout_button"));
+	unlockButton = GTK_WIDGET(gtk_builder_get_object(builder, "unlock_button"));
+
+	gtk_overlay_add_overlay(GTK_OVERLAY(overlay), unlockWindow);
+
+	gtk_widget_show_all(overlay);
+
+	gtk_entry_set_text(GTK_ENTRY(promptEntry), "");
+	gtk_label_set_label(GTK_LABEL(messageLabel), "");
+
+	g_signal_connect(promptEntry, "activate", G_CALLBACK(try_unlock), NULL);
+	g_signal_connect(unlockButton, "clicked", G_CALLBACK(try_unlock), NULL);
+	g_signal_connect(logoutButton, "clicked", G_CALLBACK(logout), NULL);
+	g_signal_connect(window, "map-event", G_CALLBACK(lock), NULL);
+	g_signal_connect(window, "delete-event", G_CALLBACK(gtk_true), NULL);
+
+	XSelectInput(gdk_x11_get_default_xdisplay(), gdk_x11_get_default_root_xwindow(), SubstructureNotifyMask);
+	gdk_window_add_filter(NULL, (GdkFilterFunc)xevent_filter, NULL);
+
+	update_logout_time();
+}
+
+static void get_username(void) {
+	struct passwd *passwd = getpwuid(getuid());
+	if (!passwd)
+		exit(2);
+
+	username = strdup(passwd->pw_name);
+}
+
+static void load_config(void) {
+	GKeyFile *keyFile = g_key_file_new();
+	if (!g_key_file_load_from_file(keyFile, CONFIG_FILE, G_KEY_FILE_NONE, NULL))
+		return;
+
+	gchar *theme = g_key_file_get_string(keyFile, "ulock", "theme", NULL);
+	if (theme)
+		gtk_settings_set_string_property(gtk_settings_get_default(), "gtk-theme-name", theme, "ulock");
+
+	logoutTime = g_key_file_get_integer(keyFile, "ulock", "logout_timeout", NULL);
+
+	gchar *logoutCommandConfig = g_key_file_get_string(keyFile, "ulock", "logout_string", NULL);
+	if (logoutCommandConfig)
+		logoutCommand = strdup(logoutCommandConfig);
+
+	g_key_file_free(keyFile);
+}
+
+int main(int argc, char *argv[]) {
+	get_username();
+	logoutCommand = strdup("echo foo");
+
+	setlocale(LC_ALL, "");
+	bindtextdomain("ulock", PREFIX "/share/locale");
+	textdomain("ulock");
+
+	openlog("ulock", LOG_PID, LOG_DAEMON);
+
+	gtk_init(&argc, &argv);
+	load_config();
+
+	create_lock_window();
+	gtk_widget_show(window);
+
+	gtk_main();
+
+	return 0;
+}