]> git.lizzy.rs Git - dragonfireclient.git/blobdiff - src/main.cpp
Fix some debug info showing despite being disabled in the UI (#12205)
[dragonfireclient.git] / src / main.cpp
index 696468049bb36b0d842aea6eef25fc4582952273..5ea212d8ad7262496d79efced31eea9933bc9791 100644 (file)
@@ -17,948 +17,550 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
-#ifdef NDEBUG
-       /*#ifdef _WIN32
-               #pragma message ("Disabling unit tests")
-       #else
-               #warning "Disabling unit tests"
-       #endif*/
-       // Disable unit tests
-       #define ENABLE_TESTS 0
-#else
-       // Enable unit tests
-       #define ENABLE_TESTS 1
-#endif
-
-#ifdef _MSC_VER
-#ifndef SERVER // Dedicated server isn't linked with Irrlicht
-       #pragma comment(lib, "Irrlicht.lib")
-       // This would get rid of the console window
-       //#pragma comment(linker, "/subsystem:windows /ENTRY:mainCRTStartup")
-#endif
-       #pragma comment(lib, "zlibwapi.lib")
-       #pragma comment(lib, "Shell32.lib")
-#endif
-
+#include "irrlichttypes.h" // must be included before anything irrlicht, see comment in the file
 #include "irrlicht.h" // createDevice
-
-#include "main.h"
-#include "mainmenumanager.h"
-#include <iostream>
-#include <fstream>
-#include <locale.h>
 #include "irrlichttypes_extrabloated.h"
+#include "chat_interface.h"
 #include "debug.h"
-#include "test.h"
+#include "unittest/test.h"
 #include "server.h"
-#include "constants.h"
-#include "porting.h"
-#include "gettime.h"
-#include "guiMessageMenu.h"
 #include "filesys.h"
-#include "config.h"
-#include "guiMainMenu.h"
-#include "game.h"
-#include "keycode.h"
-#include "tile.h"
-#include "chat.h"
+#include "version.h"
+#include "client/game.h"
 #include "defaultsettings.h"
 #include "gettext.h"
-#include "settings.h"
-#include "profiler.h"
 #include "log.h"
-#include "mods.h"
-#if USE_FREETYPE
-#include "xCGUITTFont.h"
+#include "util/quicktune.h"
+#include "httpfetch.h"
+#include "gameparams.h"
+#include "database/database.h"
+#include "config.h"
+#include "player.h"
+#include "porting.h"
+#include "network/socket.h"
+#include "mapblock.h"
+#if USE_CURSES
+       #include "terminal_chat_console.h"
+#endif
+#ifndef SERVER
+#include "gui/guiMainMenu.h"
+#include "client/clientlauncher.h"
+#include "gui/guiEngine.h"
+#include "gui/mainmenumanager.h"
+#endif
+#ifdef HAVE_TOUCHSCREENGUI
+       #include "gui/touchscreengui.h"
 #endif
-#include "util/string.h"
-#include "subgame.h"
-#include "quicktune.h"
-#include "serverlist.h"
 
-/*
-       Settings.
-       These are loaded from the config file.
-*/
-Settings main_settings;
-Settings *g_settings = &main_settings;
+// for version information only
+extern "C" {
+#if USE_LUAJIT
+       #include <luajit.h>
+#else
+       #include <lua.h>
+#endif
+}
 
-// Global profiler
-Profiler main_profiler;
-Profiler *g_profiler = &main_profiler;
+#if !defined(__cpp_rtti) || !defined(__cpp_exceptions)
+#error Minetest cannot be built without exceptions or RTTI
+#endif
 
-/*
-       Debug streams
-*/
+#if defined(__MINGW32__) && !defined(__MINGW64__) && !defined(__clang__) && \
+       (__GNUC__ < 11 || (__GNUC__ == 11 && __GNUC_MINOR__ < 1))
+// see e.g. https://github.com/minetest/minetest/issues/10137
+#warning ==================================
+#warning 32-bit MinGW gcc before 11.1 has known issues with crashes on thread exit, you should upgrade.
+#warning ==================================
+#endif
 
-// Connection
-std::ostream *dout_con_ptr = &dummyout;
-std::ostream *derr_con_ptr = &verbosestream;
+#define DEBUGFILE "debug.txt"
+#define DEFAULT_SERVER_PORT 30000
 
-// Server
-std::ostream *dout_server_ptr = &infostream;
-std::ostream *derr_server_ptr = &errorstream;
+typedef std::map<std::string, ValueSpec> OptionList;
 
-// Client
-std::ostream *dout_client_ptr = &infostream;
-std::ostream *derr_client_ptr = &errorstream;
+/**********************************************************************
+ * Private functions
+ **********************************************************************/
 
-#ifndef SERVER
-/*
-       Random stuff
-*/
+static bool get_cmdline_opts(int argc, char *argv[], Settings *cmd_args);
+static void set_allowed_options(OptionList *allowed_options);
 
-/* mainmenumanager.h */
+static void print_help(const OptionList &allowed_options);
+static void print_allowed_options(const OptionList &allowed_options);
+static void print_version();
+static void print_worldspecs(const std::vector<WorldSpec> &worldspecs,
+       std::ostream &os, bool print_name = true, bool print_path = true);
+static void print_modified_quicktune_values();
 
-gui::IGUIEnvironment* guienv = NULL;
-gui::IGUIStaticText *guiroot = NULL;
-MainMenuManager g_menumgr;
+static void list_game_ids();
+static void list_worlds(bool print_name, bool print_path);
+static bool setup_log_params(const Settings &cmd_args);
+static bool create_userdata_path();
+static bool init_common(const Settings &cmd_args, int argc, char *argv[]);
+static void uninit_common();
+static void startup_message();
+static bool read_config_file(const Settings &cmd_args);
+static void init_log_streams(const Settings &cmd_args);
 
-bool noMenuActive()
-{
-       return (g_menumgr.menuCount() == 0);
-}
+static bool game_configure(GameParams *game_params, const Settings &cmd_args);
+static void game_configure_port(GameParams *game_params, const Settings &cmd_args);
 
-// Passed to menus to allow disconnecting and exiting
-MainGameCallback *g_gamecallback = NULL;
-#endif
+static bool game_configure_world(GameParams *game_params, const Settings &cmd_args);
+static bool get_world_from_cmdline(GameParams *game_params, const Settings &cmd_args);
+static bool get_world_from_config(GameParams *game_params, const Settings &cmd_args);
+static bool auto_select_world(GameParams *game_params);
+static std::string get_clean_world_path(const std::string &path);
 
-/*
-       gettime.h implementation
-*/
+static bool game_configure_subgame(GameParams *game_params, const Settings &cmd_args);
+static bool get_game_from_cmdline(GameParams *game_params, const Settings &cmd_args);
+static bool determine_subgame(GameParams *game_params);
 
-#ifdef SERVER
+static bool run_dedicated_server(const GameParams &game_params, const Settings &cmd_args);
+static bool migrate_map_database(const GameParams &game_params, const Settings &cmd_args);
+static bool recompress_map_database(const GameParams &game_params, const Settings &cmd_args, const Address &addr);
 
-u32 getTimeMs()
-{
-       /* Use imprecise system calls directly (from porting.h) */
-       return porting::getTimeMs();
-}
+/**********************************************************************/
 
-#else
 
-// A small helper class
-class TimeGetter
-{
-public:
-       virtual u32 getTime() = 0;
-};
+FileLogOutput file_log_output;
 
-// A precise irrlicht one
-class IrrlichtTimeGetter: public TimeGetter
-{
-public:
-       IrrlichtTimeGetter(IrrlichtDevice *device):
-               m_device(device)
-       {}
-       u32 getTime()
-       {
-               if(m_device == NULL)
-                       return 0;
-               return m_device->getTimer()->getRealTime();
-       }
-private:
-       IrrlichtDevice *m_device;
-};
-// Not so precise one which works without irrlicht
-class SimpleTimeGetter: public TimeGetter
+static OptionList allowed_options;
+
+int main(int argc, char *argv[])
 {
-public:
-       u32 getTime()
-       {
-               return porting::getTimeMs();
-       }
-};
+       int retval;
+       debug_set_exception_handler();
 
-// A pointer to a global instance of the time getter
-// TODO: why?
-TimeGetter *g_timegetter = NULL;
+       g_logger.registerThread("Main");
+       g_logger.addOutputMaxLevel(&stderr_output, LL_ACTION);
 
-u32 getTimeMs()
-{
-       if(g_timegetter == NULL)
+       Settings cmd_args;
+       bool cmd_args_ok = get_cmdline_opts(argc, argv, &cmd_args);
+       if (!cmd_args_ok
+                       || cmd_args.getFlag("help")
+                       || cmd_args.exists("nonopt1")) {
+               porting::attachOrCreateConsole();
+               print_help(allowed_options);
+               return cmd_args_ok ? 0 : 1;
+       }
+       if (cmd_args.getFlag("console"))
+               porting::attachOrCreateConsole();
+
+       if (cmd_args.getFlag("version")) {
+               porting::attachOrCreateConsole();
+               print_version();
                return 0;
-       return g_timegetter->getTime();
-}
+       }
 
-#endif
+       if (!setup_log_params(cmd_args))
+               return 1;
 
-class StderrLogOutput: public ILogOutput
-{
-public:
-       /* line: Full line with timestamp, level and thread */
-       void printLog(const std::string &line)
-       {
-               std::cerr<<line<<std::endl;
-       }
-} main_stderr_log_out;
+       porting::signal_handler_init();
 
-class DstreamNoStderrLogOutput: public ILogOutput
-{
-public:
-       /* line: Full line with timestamp, level and thread */
-       void printLog(const std::string &line)
-       {
-               dstream_no_stderr<<line<<std::endl;
-       }
-} main_dstream_no_stderr_log_out;
+#ifdef __ANDROID__
+       porting::initAndroid();
+       porting::initializePathsAndroid();
+#else
+       porting::initializePaths();
+#endif
 
-#ifndef SERVER
+       if (!create_userdata_path()) {
+               errorstream << "Cannot create user data directory" << std::endl;
+               return 1;
+       }
 
-/*
-       Event handler for Irrlicht
+       // Debug handler
+       BEGIN_DEBUG_EXCEPTION_HANDLER
 
-       NOTE: Everything possible should be moved out from here,
-             probably to InputHandler and the_game
-*/
+       // List gameids if requested
+       if (cmd_args.exists("gameid") && cmd_args.get("gameid") == "list") {
+               list_game_ids();
+               return 0;
+       }
 
-class MyEventReceiver : public IEventReceiver
-{
-public:
-       // This is the one method that we have to implement
-       virtual bool OnEvent(const SEvent& event)
-       {
-               /*
-                       React to nothing here if a menu is active
-               */
-               if(noMenuActive() == false)
-               {
-                       return false;
+       // List worlds, world names, and world paths if requested
+       if (cmd_args.exists("worldlist")) {
+               if (cmd_args.get("worldlist") == "name") {
+                       list_worlds(true, false);
+               } else if (cmd_args.get("worldlist") == "path") {
+                       list_worlds(false, true);
+               } else if (cmd_args.get("worldlist") == "both") {
+                       list_worlds(true, true);
+               } else {
+                       errorstream << "Invalid --worldlist value: "
+                               << cmd_args.get("worldlist") << std::endl;
+                       return 1;
                }
+               return 0;
+       }
 
-               // Remember whether each key is down or up
-               if(event.EventType == irr::EET_KEY_INPUT_EVENT)
-               {
-                       if(event.KeyInput.PressedDown) {
-                               keyIsDown.set(event.KeyInput);
-                               keyWasDown.set(event.KeyInput);
-                       } else {
-                               keyIsDown.unset(event.KeyInput);
-                       }
-               }
+       if (!init_common(cmd_args, argc, argv))
+               return 1;
 
-               if(event.EventType == irr::EET_MOUSE_INPUT_EVENT)
-               {
-                       if(noMenuActive() == false)
-                       {
-                               left_active = false;
-                               middle_active = false;
-                               right_active = false;
-                       }
-                       else
-                       {
-                               left_active = event.MouseInput.isLeftPressed();
-                               middle_active = event.MouseInput.isMiddlePressed();
-                               right_active = event.MouseInput.isRightPressed();
-
-                               if(event.MouseInput.Event == EMIE_LMOUSE_PRESSED_DOWN)
-                               {
-                                       leftclicked = true;
-                               }
-                               if(event.MouseInput.Event == EMIE_RMOUSE_PRESSED_DOWN)
-                               {
-                                       rightclicked = true;
-                               }
-                               if(event.MouseInput.Event == EMIE_LMOUSE_LEFT_UP)
-                               {
-                                       leftreleased = true;
-                               }
-                               if(event.MouseInput.Event == EMIE_RMOUSE_LEFT_UP)
-                               {
-                                       rightreleased = true;
-                               }
-                               if(event.MouseInput.Event == EMIE_MOUSE_WHEEL)
-                               {
-                                       mouse_wheel += event.MouseInput.Wheel;
-                               }
-                       }
-               }
+       if (g_settings->getBool("enable_console"))
+               porting::attachOrCreateConsole();
 
-               return false;
+#ifndef __ANDROID__
+       // Run unit tests
+       if (cmd_args.getFlag("run-unittests")) {
+#if BUILD_UNITTESTS
+               return run_tests();
+#else
+               errorstream << "Unittest support is not enabled in this binary. "
+                       << "If you want to enable it, compile project with BUILD_UNITTESTS=1 flag."
+                       << std::endl;
+               return 1;
+#endif
        }
+#endif
 
-       bool IsKeyDown(const KeyPress &keyCode) const
-       {
-               return keyIsDown[keyCode];
-       }
-       
-       // Checks whether a key was down and resets the state
-       bool WasKeyDown(const KeyPress &keyCode)
-       {
-               bool b = keyWasDown[keyCode];
-               if (b)
-                       keyWasDown.unset(keyCode);
-               return b;
-       }
+       GameStartData game_params;
+#ifdef SERVER
+       porting::attachOrCreateConsole();
+       game_params.is_dedicated_server = true;
+#else
+       const bool isServer = cmd_args.getFlag("server");
+       if (isServer)
+               porting::attachOrCreateConsole();
+       game_params.is_dedicated_server = isServer;
+#endif
 
-       s32 getMouseWheel()
-       {
-               s32 a = mouse_wheel;
-               mouse_wheel = 0;
-               return a;
-       }
+       if (!game_configure(&game_params, cmd_args))
+               return 1;
 
-       void clearInput()
-       {
-               keyIsDown.clear();
-               keyWasDown.clear();
+       sanity_check(!game_params.world_path.empty());
 
-               leftclicked = false;
-               rightclicked = false;
-               leftreleased = false;
-               rightreleased = false;
+       if (game_params.is_dedicated_server)
+               return run_dedicated_server(game_params, cmd_args) ? 0 : 1;
 
-               left_active = false;
-               middle_active = false;
-               right_active = false;
+#ifndef SERVER
+       retval = ClientLauncher().run(game_params, cmd_args) ? 0 : 1;
+#else
+       retval = 0;
+#endif
 
-               mouse_wheel = 0;
-       }
+       // Update configuration file
+       if (!g_settings_path.empty())
+               g_settings->updateConfigFile(g_settings_path.c_str());
 
-       MyEventReceiver()
-       {
-               clearInput();
-       }
+       print_modified_quicktune_values();
 
-       bool leftclicked;
-       bool rightclicked;
-       bool leftreleased;
-       bool rightreleased;
+       END_DEBUG_EXCEPTION_HANDLER
 
-       bool left_active;
-       bool middle_active;
-       bool right_active;
+       return retval;
+}
 
-       s32 mouse_wheel;
 
-private:
-       IrrlichtDevice *m_device;
-       
-       // The current state of keys
-       KeyList keyIsDown;
-       // Whether a key has been pressed or not
-       KeyList keyWasDown;
-};
+/*****************************************************************************
+ * Startup / Init
+ *****************************************************************************/
 
-/*
-       Separated input handler
-*/
 
-class RealInputHandler : public InputHandler
+static bool get_cmdline_opts(int argc, char *argv[], Settings *cmd_args)
 {
-public:
-       RealInputHandler(IrrlichtDevice *device, MyEventReceiver *receiver):
-               m_device(device),
-               m_receiver(receiver)
-       {
-       }
-       virtual bool isKeyDown(const KeyPress &keyCode)
-       {
-               return m_receiver->IsKeyDown(keyCode);
-       }
-       virtual bool wasKeyDown(const KeyPress &keyCode)
-       {
-               return m_receiver->WasKeyDown(keyCode);
-       }
-       virtual v2s32 getMousePos()
-       {
-               return m_device->getCursorControl()->getPosition();
-       }
-       virtual void setMousePos(s32 x, s32 y)
-       {
-               m_device->getCursorControl()->setPosition(x, y);
-       }
+       set_allowed_options(&allowed_options);
 
-       virtual bool getLeftState()
-       {
-               return m_receiver->left_active;
-       }
-       virtual bool getRightState()
-       {
-               return m_receiver->right_active;
-       }
-       
-       virtual bool getLeftClicked()
-       {
-               return m_receiver->leftclicked;
-       }
-       virtual bool getRightClicked()
-       {
-               return m_receiver->rightclicked;
-       }
-       virtual void resetLeftClicked()
-       {
-               m_receiver->leftclicked = false;
-       }
-       virtual void resetRightClicked()
-       {
-               m_receiver->rightclicked = false;
-       }
+       return cmd_args->parseCommandLine(argc, argv, allowed_options);
+}
 
-       virtual bool getLeftReleased()
-       {
-               return m_receiver->leftreleased;
-       }
-       virtual bool getRightReleased()
-       {
-               return m_receiver->rightreleased;
-       }
-       virtual void resetLeftReleased()
-       {
-               m_receiver->leftreleased = false;
-       }
-       virtual void resetRightReleased()
-       {
-               m_receiver->rightreleased = false;
-       }
+static void set_allowed_options(OptionList *allowed_options)
+{
+       allowed_options->clear();
 
-       virtual s32 getMouseWheel()
-       {
-               return m_receiver->getMouseWheel();
-       }
+       allowed_options->insert(std::make_pair("help", ValueSpec(VALUETYPE_FLAG,
+                       _("Show allowed options"))));
+       allowed_options->insert(std::make_pair("version", ValueSpec(VALUETYPE_FLAG,
+                       _("Show version information"))));
+       allowed_options->insert(std::make_pair("config", ValueSpec(VALUETYPE_STRING,
+                       _("Load configuration from specified file"))));
+       allowed_options->insert(std::make_pair("port", ValueSpec(VALUETYPE_STRING,
+                       _("Set network port (UDP)"))));
+       allowed_options->insert(std::make_pair("run-unittests", ValueSpec(VALUETYPE_FLAG,
+                       _("Run the unit tests and exit"))));
+       allowed_options->insert(std::make_pair("map-dir", ValueSpec(VALUETYPE_STRING,
+                       _("Same as --world (deprecated)"))));
+       allowed_options->insert(std::make_pair("world", ValueSpec(VALUETYPE_STRING,
+                       _("Set world path (implies local game if used with option --go)"))));
+       allowed_options->insert(std::make_pair("worldname", ValueSpec(VALUETYPE_STRING,
+                       _("Set world by name (implies local game if used with option --go)"))));
+       allowed_options->insert(std::make_pair("worldlist", ValueSpec(VALUETYPE_STRING,
+                       _("Get list of worlds ('path' lists paths, "
+                       "'name' lists names, 'both' lists both)"))));
+       allowed_options->insert(std::make_pair("quiet", ValueSpec(VALUETYPE_FLAG,
+                       _("Print to console errors only"))));
+       allowed_options->insert(std::make_pair("color", ValueSpec(VALUETYPE_STRING,
+                       _("Coloured logs ('always', 'never' or 'auto'), defaults to 'auto'"
+                       ))));
+       allowed_options->insert(std::make_pair("info", ValueSpec(VALUETYPE_FLAG,
+                       _("Print more information to console"))));
+       allowed_options->insert(std::make_pair("verbose",  ValueSpec(VALUETYPE_FLAG,
+                       _("Print even more information to console"))));
+       allowed_options->insert(std::make_pair("trace", ValueSpec(VALUETYPE_FLAG,
+                       _("Print enormous amounts of information to log and console"))));
+       allowed_options->insert(std::make_pair("logfile", ValueSpec(VALUETYPE_STRING,
+                       _("Set logfile path ('' = no logging)"))));
+       allowed_options->insert(std::make_pair("gameid", ValueSpec(VALUETYPE_STRING,
+                       _("Set gameid (\"--gameid list\" prints available ones)"))));
+       allowed_options->insert(std::make_pair("migrate", ValueSpec(VALUETYPE_STRING,
+                       _("Migrate from current map backend to another (Only works when using minetestserver or with --server)"))));
+       allowed_options->insert(std::make_pair("migrate-players", ValueSpec(VALUETYPE_STRING,
+               _("Migrate from current players backend to another (Only works when using minetestserver or with --server)"))));
+       allowed_options->insert(std::make_pair("migrate-auth", ValueSpec(VALUETYPE_STRING,
+               _("Migrate from current auth backend to another (Only works when using minetestserver or with --server)"))));
+       allowed_options->insert(std::make_pair("migrate-mod-storage", ValueSpec(VALUETYPE_STRING,
+               _("Migrate from current mod storage backend to another (Only works when using minetestserver or with --server)"))));
+       allowed_options->insert(std::make_pair("terminal", ValueSpec(VALUETYPE_FLAG,
+                       _("Feature an interactive terminal (Only works when using minetestserver or with --server)"))));
+       allowed_options->insert(std::make_pair("recompress", ValueSpec(VALUETYPE_FLAG,
+                       _("Recompress the blocks of the given map database."))));
+#ifndef SERVER
+       allowed_options->insert(std::make_pair("speedtests", ValueSpec(VALUETYPE_FLAG,
+                       _("Run speed tests"))));
+       allowed_options->insert(std::make_pair("address", ValueSpec(VALUETYPE_STRING,
+                       _("Address to connect to. ('' = local game)"))));
+       allowed_options->insert(std::make_pair("random-input", ValueSpec(VALUETYPE_FLAG,
+                       _("Enable random user input, for testing"))));
+       allowed_options->insert(std::make_pair("server", ValueSpec(VALUETYPE_FLAG,
+                       _("Run dedicated server"))));
+       allowed_options->insert(std::make_pair("name", ValueSpec(VALUETYPE_STRING,
+                       _("Set player name"))));
+       allowed_options->insert(std::make_pair("password", ValueSpec(VALUETYPE_STRING,
+                       _("Set password"))));
+       allowed_options->insert(std::make_pair("password-file", ValueSpec(VALUETYPE_STRING,
+                       _("Set password from contents of file"))));
+       allowed_options->insert(std::make_pair("go", ValueSpec(VALUETYPE_FLAG,
+                       _("Disable main menu"))));
+       allowed_options->insert(std::make_pair("console", ValueSpec(VALUETYPE_FLAG,
+               _("Starts with the console (Windows only)"))));
+#endif
 
-       void clear()
-       {
-               m_receiver->clearInput();
-       }
-private:
-       IrrlichtDevice *m_device;
-       MyEventReceiver *m_receiver;
-};
+}
 
-class RandomInputHandler : public InputHandler
+static void print_help(const OptionList &allowed_options)
 {
-public:
-       RandomInputHandler()
-       {
-               leftdown = false;
-               rightdown = false;
-               leftclicked = false;
-               rightclicked = false;
-               leftreleased = false;
-               rightreleased = false;
-               keydown.clear();
-       }
-       virtual bool isKeyDown(const KeyPress &keyCode)
-       {
-               return keydown[keyCode];
-       }
-       virtual bool wasKeyDown(const KeyPress &keyCode)
-       {
-               return false;
-       }
-       virtual v2s32 getMousePos()
-       {
-               return mousepos;
-       }
-       virtual void setMousePos(s32 x, s32 y)
-       {
-               mousepos = v2s32(x,y);
-       }
-
-       virtual bool getLeftState()
-       {
-               return leftdown;
-       }
-       virtual bool getRightState()
-       {
-               return rightdown;
-       }
+       std::cout << _("Allowed options:") << std::endl;
+       print_allowed_options(allowed_options);
+}
 
-       virtual bool getLeftClicked()
-       {
-               return leftclicked;
-       }
-       virtual bool getRightClicked()
-       {
-               return rightclicked;
-       }
-       virtual void resetLeftClicked()
-       {
-               leftclicked = false;
-       }
-       virtual void resetRightClicked()
-       {
-               rightclicked = false;
-       }
+static void print_allowed_options(const OptionList &allowed_options)
+{
+       for (const auto &allowed_option : allowed_options) {
+               std::ostringstream os1(std::ios::binary);
+               os1 << "  --" << allowed_option.first;
+               if (allowed_option.second.type != VALUETYPE_FLAG)
+                       os1 << _(" <value>");
 
-       virtual bool getLeftReleased()
-       {
-               return leftreleased;
-       }
-       virtual bool getRightReleased()
-       {
-               return rightreleased;
-       }
-       virtual void resetLeftReleased()
-       {
-               leftreleased = false;
-       }
-       virtual void resetRightReleased()
-       {
-               rightreleased = false;
-       }
+               std::cout << padStringRight(os1.str(), 30);
 
-       virtual s32 getMouseWheel()
-       {
-               return 0;
-       }
+               if (allowed_option.second.help)
+                       std::cout << allowed_option.second.help;
 
-       virtual void step(float dtime)
-       {
-               {
-                       static float counter1 = 0;
-                       counter1 -= dtime;
-                       if(counter1 < 0.0)
-                       {
-                               counter1 = 0.1*Rand(1, 40);
-                               keydown.toggle(getKeySetting("keymap_jump"));
-                       }
-               }
-               {
-                       static float counter1 = 0;
-                       counter1 -= dtime;
-                       if(counter1 < 0.0)
-                       {
-                               counter1 = 0.1*Rand(1, 40);
-                               keydown.toggle(getKeySetting("keymap_special1"));
-                       }
-               }
-               {
-                       static float counter1 = 0;
-                       counter1 -= dtime;
-                       if(counter1 < 0.0)
-                       {
-                               counter1 = 0.1*Rand(1, 40);
-                               keydown.toggle(getKeySetting("keymap_forward"));
-                       }
-               }
-               {
-                       static float counter1 = 0;
-                       counter1 -= dtime;
-                       if(counter1 < 0.0)
-                       {
-                               counter1 = 0.1*Rand(1, 40);
-                               keydown.toggle(getKeySetting("keymap_left"));
-                       }
-               }
-               {
-                       static float counter1 = 0;
-                       counter1 -= dtime;
-                       if(counter1 < 0.0)
-                       {
-                               counter1 = 0.1*Rand(1, 20);
-                               mousespeed = v2s32(Rand(-20,20), Rand(-15,20));
-                       }
-               }
-               {
-                       static float counter1 = 0;
-                       counter1 -= dtime;
-                       if(counter1 < 0.0)
-                       {
-                               counter1 = 0.1*Rand(1, 30);
-                               leftdown = !leftdown;
-                               if(leftdown)
-                                       leftclicked = true;
-                               if(!leftdown)
-                                       leftreleased = true;
-                       }
-               }
-               {
-                       static float counter1 = 0;
-                       counter1 -= dtime;
-                       if(counter1 < 0.0)
-                       {
-                               counter1 = 0.1*Rand(1, 15);
-                               rightdown = !rightdown;
-                               if(rightdown)
-                                       rightclicked = true;
-                               if(!rightdown)
-                                       rightreleased = true;
-                       }
-               }
-               mousepos += mousespeed;
+               std::cout << std::endl;
        }
+}
 
-       s32 Rand(s32 min, s32 max)
-       {
-               return (myrand()%(max-min+1))+min;
-       }
-private:
-       KeyList keydown;
-       v2s32 mousepos;
-       v2s32 mousespeed;
-       bool leftdown;
-       bool rightdown;
-       bool leftclicked;
-       bool rightclicked;
-       bool leftreleased;
-       bool rightreleased;
-};
-
-void drawMenuBackground(video::IVideoDriver* driver)
+static void print_version()
 {
-       core::dimension2d<u32> screensize = driver->getScreenSize();
-               
-       video::ITexture *bgtexture =
-                       driver->getTexture(getTexturePath("menubg.png").c_str());
-       if(bgtexture)
-       {
-               s32 scaledsize = 128;
-               
-               // The important difference between destsize and screensize is
-               // that destsize is rounded to whole scaled pixels.
-               // These formulas use component-wise multiplication and division of v2u32.
-               v2u32 texturesize = bgtexture->getSize();
-               v2u32 sourcesize = texturesize * screensize / scaledsize + v2u32(1,1);
-               v2u32 destsize = scaledsize * sourcesize / texturesize;
-               
-               // Default texture wrapping mode in Irrlicht is ETC_REPEAT.
-               driver->draw2DImage(bgtexture,
-                       core::rect<s32>(0, 0, destsize.X, destsize.Y),
-                       core::rect<s32>(0, 0, sourcesize.X, sourcesize.Y),
-                       NULL, NULL, true);
-       }
-       
-       video::ITexture *logotexture =
-                       driver->getTexture(getTexturePath("menulogo.png").c_str());
-       if(logotexture)
-       {
-               v2s32 logosize(logotexture->getOriginalSize().Width,
-                               logotexture->getOriginalSize().Height);
-               logosize *= 4;
-
-               video::SColor bgcolor(255,50,50,50);
-               core::rect<s32> bgrect(0, screensize.Height-logosize.Y-20,
-                               screensize.Width, screensize.Height);
-               driver->draw2DRectangle(bgcolor, bgrect, NULL);
-
-               core::rect<s32> rect(0,0,logosize.X,logosize.Y);
-               rect += v2s32(screensize.Width/2,screensize.Height-10-logosize.Y);
-               rect -= v2s32(logosize.X/2, 0);
-               driver->draw2DImage(logotexture, rect,
-                       core::rect<s32>(core::position2d<s32>(0,0),
-                       core::dimension2di(logotexture->getSize())),
-                       NULL, NULL, true);
-       }
+       std::cout << PROJECT_NAME_C " " << g_version_hash
+               << " (" << porting::getPlatformName() << ")" << std::endl;
+#ifndef SERVER
+       std::cout << "Using Irrlicht " IRRLICHT_SDK_VERSION << std::endl;
+#endif
+#if USE_LUAJIT
+       std::cout << "Using " << LUAJIT_VERSION << std::endl;
+#else
+       std::cout << "Using " << LUA_RELEASE << std::endl;
+#endif
+       std::cout << g_build_info << std::endl;
 }
 
-#endif
+static void list_game_ids()
+{
+       std::set<std::string> gameids = getAvailableGameIds();
+       for (const std::string &gameid : gameids)
+               std::cout << gameid <<std::endl;
+}
 
-// These are defined global so that they're not optimized too much.
-// Can't change them to volatile.
-s16 temp16;
-f32 tempf;
-v3f tempv3f1;
-v3f tempv3f2;
-std::string tempstring;
-std::string tempstring2;
+static void list_worlds(bool print_name, bool print_path)
+{
+       std::cout << _("Available worlds:") << std::endl;
+       std::vector<WorldSpec> worldspecs = getAvailableWorlds();
+       print_worldspecs(worldspecs, std::cout, print_name, print_path);
+}
 
-void SpeedTests()
+static void print_worldspecs(const std::vector<WorldSpec> &worldspecs,
+       std::ostream &os, bool print_name, bool print_path)
 {
-       {
-               infostream<<"The following test should take around 20ms."<<std::endl;
-               TimeTaker timer("Testing std::string speed");
-               const u32 jj = 10000;
-               for(u32 j=0; j<jj; j++)
-               {
-                       tempstring = "";
-                       tempstring2 = "";
-                       const u32 ii = 10;
-                       for(u32 i=0; i<ii; i++){
-                               tempstring2 += "asd";
-                       }
-                       for(u32 i=0; i<ii+1; i++){
-                               tempstring += "asd";
-                               if(tempstring == tempstring2)
-                                       break;
-                       }
+       for (const WorldSpec &worldspec : worldspecs) {
+               std::string name = worldspec.name;
+               std::string path = worldspec.path;
+               if (print_name && print_path) {
+                       os << "\t" << name << "\t\t" << path << std::endl;
+               } else if (print_name) {
+                       os << "\t" << name << std::endl;
+               } else if (print_path) {
+                       os << "\t" << path << std::endl;
                }
        }
-       
-       infostream<<"All of the following tests should take around 100ms each."
-                       <<std::endl;
-
-       {
-               TimeTaker timer("Testing floating-point conversion speed");
-               tempf = 0.001;
-               for(u32 i=0; i<4000000; i++){
-                       temp16 += tempf;
-                       tempf += 0.001;
+}
+
+static void print_modified_quicktune_values()
+{
+       bool header_printed = false;
+       std::vector<std::string> names = getQuicktuneNames();
+
+       for (const std::string &name : names) {
+               QuicktuneValue val = getQuicktuneValue(name);
+               if (!val.modified)
+                       continue;
+               if (!header_printed) {
+                       dstream << "Modified quicktune values:" << std::endl;
+                       header_printed = true;
                }
+               dstream << name << " = " << val.getString() << std::endl;
+       }
+}
+
+static bool setup_log_params(const Settings &cmd_args)
+{
+       // Quiet mode, print errors only
+       if (cmd_args.getFlag("quiet")) {
+               g_logger.removeOutput(&stderr_output);
+               g_logger.addOutputMaxLevel(&stderr_output, LL_ERROR);
+       }
+
+       // Coloured log messages (see log.h)
+       std::string color_mode;
+       if (cmd_args.exists("color")) {
+               color_mode = cmd_args.get("color");
+#if !defined(_WIN32)
+       } else {
+               char *color_mode_env = getenv("MT_LOGCOLOR");
+               if (color_mode_env)
+                       color_mode = color_mode_env;
+#endif
        }
-       
-       {
-               TimeTaker timer("Testing floating-point vector speed");
-
-               tempv3f1 = v3f(1,2,3);
-               tempv3f2 = v3f(4,5,6);
-               for(u32 i=0; i<10000000; i++){
-                       tempf += tempv3f1.dotProduct(tempv3f2);
-                       tempv3f2 += v3f(7,8,9);
+       if (color_mode != "") {
+               if (color_mode == "auto") {
+                       Logger::color_mode = LOG_COLOR_AUTO;
+               } else if (color_mode == "always") {
+                       Logger::color_mode = LOG_COLOR_ALWAYS;
+               } else if (color_mode == "never") {
+                       Logger::color_mode = LOG_COLOR_NEVER;
+               } else {
+                       errorstream << "Invalid color mode: " << color_mode << std::endl;
+                       return false;
                }
        }
 
-       {
-               TimeTaker timer("Testing std::map speed");
-               
-               std::map<v2s16, f32> map1;
-               tempf = -324;
-               const s16 ii=300;
-               for(s16 y=0; y<ii; y++){
-                       for(s16 x=0; x<ii; x++){
-                               map1[v2s16(x,y)] =  tempf;
-                               tempf += 1;
-                       }
-               }
-               for(s16 y=ii-1; y>=0; y--){
-                       for(s16 x=0; x<ii; x++){
-                               tempf = map1[v2s16(x,y)];
-                       }
-               }
+       // If trace is enabled, enable logging of certain things
+       if (cmd_args.getFlag("trace")) {
+               dstream << _("Enabling trace level debug output") << std::endl;
+               g_logger.setTraceEnabled(true);
+               dout_con_ptr = &verbosestream; // This is somewhat old
+               socket_enable_debug_output = true; // Sockets doesn't use log.h
        }
 
-       {
-               infostream<<"Around 5000/ms should do well here."<<std::endl;
-               TimeTaker timer("Testing mutex speed");
-               
-               JMutex m;
-               m.Init();
-               u32 n = 0;
-               u32 i = 0;
-               do{
-                       n += 10000;
-                       for(; i<n; i++){
-                               m.Lock();
-                               m.Unlock();
-                       }
-               }
-               // Do at least 10ms
-               while(timer.getTime() < 10);
+       // In certain cases, output info level on stderr
+       if (cmd_args.getFlag("info") || cmd_args.getFlag("verbose") ||
+                       cmd_args.getFlag("trace") || cmd_args.getFlag("speedtests"))
+               g_logger.addOutput(&stderr_output, LL_INFO);
 
-               u32 dtime = timer.stop();
-               u32 per_ms = n / dtime;
-               infostream<<"Done. "<<dtime<<"ms, "
-                               <<per_ms<<"/ms"<<std::endl;
-       }
+       // In certain cases, output verbose level on stderr
+       if (cmd_args.getFlag("verbose") || cmd_args.getFlag("trace"))
+               g_logger.addOutput(&stderr_output, LL_VERBOSE);
+
+       return true;
 }
 
-static void print_worldspecs(const std::vector<WorldSpec> &worldspecs,
-               std::ostream &os)
+static bool create_userdata_path()
 {
-       for(u32 i=0; i<worldspecs.size(); i++){
-               std::string name = worldspecs[i].name;
-               std::string path = worldspecs[i].path;
-               if(name.find(" ") != std::string::npos)
-                       name = std::string("'") + name + "'";
-               path = std::string("'") + path + "'";
-               name = padStringRight(name, 14);
-               os<<"  "<<name<<" "<<path<<std::endl;
+       bool success;
+
+#ifdef __ANDROID__
+       if (!fs::PathExists(porting::path_user)) {
+               success = fs::CreateDir(porting::path_user);
+       } else {
+               success = true;
        }
+#else
+       // Create user data directory
+       success = fs::CreateDir(porting::path_user);
+#endif
+
+       return success;
 }
 
-int main(int argc, char *argv[])
+static bool init_common(const Settings &cmd_args, int argc, char *argv[])
 {
-       int retval = 0;
+       startup_message();
+       set_default_settings();
 
-       /*
-               Initialization
-       */
+       sockets_init();
 
-       log_add_output_maxlev(&main_stderr_log_out, LMT_ACTION);
-       log_add_output_all_levs(&main_dstream_no_stderr_log_out);
+       // Initialize g_settings
+       Settings::createLayer(SL_GLOBAL);
 
-       log_register_thread("main");
+       // Set cleanup callback(s) to run at process exit
+       atexit(uninit_common);
 
-       // This enables internatonal characters input
-       if( setlocale(LC_ALL, "") == NULL )
-       {
-               fprintf( stderr, "%s: warning: could not set default locale\n", argv[0] );
-       }
+       if (!read_config_file(cmd_args))
+               return false;
 
-       // Set locale. This is for forcing '.' as the decimal point.
-       try {
-               std::locale::global(std::locale(std::locale(""), "C", std::locale::numeric));
-               setlocale(LC_NUMERIC, "C");
-       } catch (const std::exception& ex) {
-               errorstream<<"Could not set numeric locale to C"<<std::endl;
-       }
-       /*
-               Parse command line
-       */
-       
-       // List all allowed options
-       std::map<std::string, ValueSpec> allowed_options;
-       allowed_options.insert(std::make_pair("help", ValueSpec(VALUETYPE_FLAG,
-                       _("Show allowed options"))));
-       allowed_options.insert(std::make_pair("config", ValueSpec(VALUETYPE_STRING,
-                       _("Load configuration from specified file"))));
-       allowed_options.insert(std::make_pair("port", ValueSpec(VALUETYPE_STRING,
-                       _("Set network port (UDP)"))));
-       allowed_options.insert(std::make_pair("disable-unittests", ValueSpec(VALUETYPE_FLAG,
-                       _("Disable unit tests"))));
-       allowed_options.insert(std::make_pair("enable-unittests", ValueSpec(VALUETYPE_FLAG,
-                       _("Enable unit tests"))));
-       allowed_options.insert(std::make_pair("map-dir", ValueSpec(VALUETYPE_STRING,
-                       _("Same as --world (deprecated)"))));
-       allowed_options.insert(std::make_pair("world", ValueSpec(VALUETYPE_STRING,
-                       _("Set world path (implies local game) ('list' lists all)"))));
-       allowed_options.insert(std::make_pair("worldname", ValueSpec(VALUETYPE_STRING,
-                       _("Set world by name (implies local game)"))));
-       allowed_options.insert(std::make_pair("info", ValueSpec(VALUETYPE_FLAG,
-                       _("Print more information to console"))));
-       allowed_options.insert(std::make_pair("verbose",  ValueSpec(VALUETYPE_FLAG,
-                       _("Print even more information to console"))));
-       allowed_options.insert(std::make_pair("trace", ValueSpec(VALUETYPE_FLAG,
-                       _("Print enormous amounts of information to log and console"))));
-       allowed_options.insert(std::make_pair("logfile", ValueSpec(VALUETYPE_STRING,
-                       _("Set logfile path ('' = no logging)"))));
-       allowed_options.insert(std::make_pair("gameid", ValueSpec(VALUETYPE_STRING,
-                       _("Set gameid (\"--gameid list\" prints available ones)"))));
-#ifndef SERVER
-       allowed_options.insert(std::make_pair("speedtests", ValueSpec(VALUETYPE_FLAG,
-                       _("Run speed tests"))));
-       allowed_options.insert(std::make_pair("address", ValueSpec(VALUETYPE_STRING,
-                       _("Address to connect to. ('' = local game)"))));
-       allowed_options.insert(std::make_pair("random-input", ValueSpec(VALUETYPE_FLAG,
-                       _("Enable random user input, for testing"))));
-       allowed_options.insert(std::make_pair("server", ValueSpec(VALUETYPE_FLAG,
-                       _("Run dedicated server"))));
-       allowed_options.insert(std::make_pair("name", ValueSpec(VALUETYPE_STRING,
-                       _("Set player name"))));
-       allowed_options.insert(std::make_pair("password", ValueSpec(VALUETYPE_STRING,
-                       _("Set password"))));
-       allowed_options.insert(std::make_pair("go", ValueSpec(VALUETYPE_FLAG,
-                       _("Disable main menu"))));
-#endif
+       init_log_streams(cmd_args);
 
-       Settings cmd_args;
-       
-       bool ret = cmd_args.parseCommandLine(argc, argv, allowed_options);
-
-       if(ret == false || cmd_args.getFlag("help") || cmd_args.exists("nonopt1"))
-       {
-               dstream<<_("Allowed options:")<<std::endl;
-               for(std::map<std::string, ValueSpec>::iterator
-                               i = allowed_options.begin();
-                               i != allowed_options.end(); ++i)
-               {
-                       std::ostringstream os1(std::ios::binary);
-                       os1<<"  --"<<i->first;
-                       if(i->second.type == VALUETYPE_FLAG)
-                               {}
-                       else
-                               os1<<_(" <value>");
-                       dstream<<padStringRight(os1.str(), 24);
-
-                       if(i->second.help != NULL)
-                               dstream<<i->second.help;
-                       dstream<<std::endl;
-               }
+       // Initialize random seed
+       srand(time(0));
+       mysrand(time(0));
 
-               return cmd_args.getFlag("help") ? 0 : 1;
-       }
-       
-       /*
-               Low-level initialization
-       */
-       
-       // If trace is enabled, enable logging of certain things
-       if(cmd_args.getFlag("trace")){
-               dstream<<_("Enabling trace level debug output")<<std::endl;
-               log_trace_level_enabled = true;
-               dout_con_ptr = &verbosestream; // this is somewhat old crap
-               socket_enable_debug_output = true; // socket doesn't use log.h
-       }
-       // In certain cases, output info level on stderr
-       if(cmd_args.getFlag("info") || cmd_args.getFlag("verbose") ||
-                       cmd_args.getFlag("trace") || cmd_args.getFlag("speedtests"))
-               log_add_output(&main_stderr_log_out, LMT_INFO);
-       // In certain cases, output verbose level on stderr
-       if(cmd_args.getFlag("verbose") || cmd_args.getFlag("trace"))
-               log_add_output(&main_stderr_log_out, LMT_VERBOSE);
+       // Initialize HTTP fetcher
+       httpfetch_init(g_settings->getS32("curl_parallel_limit"));
 
-       porting::signal_handler_init();
-       bool &kill = *porting::signal_handler_killstatus();
-       
-       porting::initializePaths();
+       init_gettext(porting::path_locale.c_str(),
+               g_settings->get("language"), argc, argv);
 
-       // Create user data directory
-       fs::CreateDir(porting::path_user);
+       return true;
+}
 
-       init_gettext((porting::path_share + DIR_DELIM + "locale").c_str());
+static void uninit_common()
+{
+       httpfetch_cleanup();
 
-       infostream<<"path_share = "<<porting::path_share<<std::endl;
-       infostream<<"path_user  = "<<porting::path_user<<std::endl;
+       sockets_cleanup();
 
-       // Initialize debug stacks
-       debug_stacks_init();
-       DSTACK(__FUNCTION_NAME);
+       // It'd actually be okay to leak these but we want to please valgrind...
+       for (int i = 0; i < (int)SL_TOTAL_COUNT; i++)
+               delete Settings::getLayer((SettingsLayer)i);
+}
 
-       // Debug handler
-       BEGIN_DEBUG_EXCEPTION_HANDLER
-       
-       // List gameids if requested
-       if(cmd_args.exists("gameid") && cmd_args.get("gameid") == "list")
-       {
-               std::set<std::string> gameids = getAvailableGameIds();
-               for(std::set<std::string>::const_iterator i = gameids.begin();
-                               i != gameids.end(); i++)
-                       dstream<<(*i)<<std::endl;
-               return 0;
-       }
-       
-       // List worlds if requested
-       if(cmd_args.exists("world") && cmd_args.get("world") == "list"){
-               dstream<<_("Available worlds:")<<std::endl;
-               std::vector<WorldSpec> worldspecs = getAvailableWorlds();
-               print_worldspecs(worldspecs, dstream);
-               return 0;
-       }
-       
-       // Print startup message
-       infostream<<PROJECT_NAME<<
-                       " "<<_("with")<<" SER_FMT_VER_HIGHEST="<<(int)SER_FMT_VER_HIGHEST
-                       <<", "<<BUILD_INFO
-                       <<std::endl;
-       
-       /*
-               Basic initialization
-       */
-
-       // Initialize default settings
-       set_default_settings(g_settings);
-       
-       // Initialize sockets
-       sockets_init();
-       atexit(sockets_cleanup);
-       
-       /*
-               Read config file
-       */
-       
+static void startup_message()
+{
+       infostream << PROJECT_NAME << " " << _("with")
+                  << " SER_FMT_VER_HIGHEST_READ="
+               << (int)SER_FMT_VER_HIGHEST_READ << ", "
+               << g_build_info << std::endl;
+}
+
+static bool read_config_file(const Settings &cmd_args)
+{
        // Path of configuration file in use
-       std::string configpath = "";
-       
-       if(cmd_args.exists("config"))
-       {
+       sanity_check(g_settings_path == "");    // Sanity check
+
+       if (cmd_args.exists("config")) {
                bool r = g_settings->readConfigFile(cmd_args.get("config").c_str());
-               if(r == false)
-               {
-                       errorstream<<"Could not read configuration from \""
-                                       <<cmd_args.get("config")<<"\""<<std::endl;
-                       return 1;
+               if (!r) {
+                       errorstream << "Could not read configuration from \""
+                                   << cmd_args.get("config") << "\"" << std::endl;
+                       return false;
                }
-               configpath = cmd_args.get("config");
-       }
-       else
-       {
+               g_settings_path = cmd_args.get("config");
+       } else {
                std::vector<std::string> filenames;
-               filenames.push_back(porting::path_user +
-                               DIR_DELIM + "minetest.conf");
+               filenames.push_back(porting::path_user + DIR_DELIM + "minetest.conf");
                // Legacy configuration file location
                filenames.push_back(porting::path_user +
                                DIR_DELIM + ".." + DIR_DELIM + "minetest.conf");
+
 #if RUN_IN_PLACE
                // Try also from a lower level (to aid having the same configuration
                // for many RUN_IN_PLACE installs)
@@ -966,845 +568,550 @@ int main(int argc, char *argv[])
                                DIR_DELIM + ".." + DIR_DELIM + ".." + DIR_DELIM + "minetest.conf");
 #endif
 
-               for(u32 i=0; i<filenames.size(); i++)
-               {
-                       bool r = g_settings->readConfigFile(filenames[i].c_str());
-                       if(r)
-                       {
-                               configpath = filenames[i];
+               for (const std::string &filename : filenames) {
+                       bool r = g_settings->readConfigFile(filename.c_str());
+                       if (r) {
+                               g_settings_path = filename;
                                break;
                        }
                }
-               
+
                // If no path found, use the first one (menu creates the file)
-               if(configpath == "")
-                       configpath = filenames[0];
+               if (g_settings_path.empty())
+                       g_settings_path = filenames[0];
        }
-       
-       // Initialize debug streams
-#define DEBUGFILE "debug.txt"
-#if RUN_IN_PLACE
-       std::string logfile = DEBUGFILE;
-#else
-       std::string logfile = porting::path_user+DIR_DELIM+DEBUGFILE;
-#endif
-       if(cmd_args.exists("logfile"))
-               logfile = cmd_args.get("logfile");
-       
-       log_remove_output(&main_dstream_no_stderr_log_out);
-       int loglevel = g_settings->getS32("debug_log_level");
-
-       if (loglevel == 0) //no logging
-               logfile = "";
-       else if (loglevel > 0 && loglevel <= LMT_NUM_VALUES)
-               log_add_output_maxlev(&main_dstream_no_stderr_log_out, (LogMessageLevel)(loglevel - 1));
-
-       if(logfile != "")
-               debugstreams_init(false, logfile.c_str());
-       else
-               debugstreams_init(false, NULL);
-               
-       infostream<<"logfile    = "<<logfile<<std::endl;
 
-       // Initialize random seed
-       srand(time(0));
-       mysrand(time(0));
+       return true;
+}
 
-       /*
-               Run unit tests
-       */
+static void init_log_streams(const Settings &cmd_args)
+{
+       std::string log_filename = porting::path_user + DIR_DELIM + DEBUGFILE;
+
+       if (cmd_args.exists("logfile"))
+               log_filename = cmd_args.get("logfile");
+
+       g_logger.removeOutput(&file_log_output);
+       std::string conf_loglev = g_settings->get("debug_log_level");
+
+       // Old integer format
+       if (std::isdigit(conf_loglev[0])) {
+               warningstream << "Deprecated use of debug_log_level with an "
+                       "integer value; please update your configuration." << std::endl;
+               static const char *lev_name[] =
+                       {"", "error", "action", "info", "verbose"};
+               int lev_i = atoi(conf_loglev.c_str());
+               if (lev_i < 0 || lev_i >= (int)ARRLEN(lev_name)) {
+                       warningstream << "Supplied invalid debug_log_level!"
+                               "  Assuming action level." << std::endl;
+                       lev_i = 2;
+               }
+               conf_loglev = lev_name[lev_i];
+       }
+
+       if (log_filename.empty() || conf_loglev.empty())  // No logging
+               return;
 
-       if((ENABLE_TESTS && cmd_args.getFlag("disable-unittests") == false)
-                       || cmd_args.getFlag("enable-unittests") == true)
-       {
-               run_tests();
+       LogLevel log_level = Logger::stringToLevel(conf_loglev);
+       if (log_level == LL_MAX) {
+               warningstream << "Supplied unrecognized debug_log_level; "
+                       "using maximum." << std::endl;
        }
-       
-       /*
-               Game parameters
-       */
-
-       // Port
-       u16 port = 30000;
-       if(cmd_args.exists("port"))
-               port = cmd_args.getU16("port");
-       else if(g_settings->exists("port"))
-               port = g_settings->getU16("port");
-       if(port == 0)
-               port = 30000;
-       
-       // World directory
-       std::string commanded_world = "";
-       if(cmd_args.exists("world"))
-               commanded_world = cmd_args.get("world");
-       else if(cmd_args.exists("map-dir"))
-               commanded_world = cmd_args.get("map-dir");
-       else if(cmd_args.exists("nonopt0")) // First nameless argument
-               commanded_world = cmd_args.get("nonopt0");
-       else if(g_settings->exists("map-dir"))
-               commanded_world = g_settings->get("map-dir");
-       
+
+       file_log_output.setFile(log_filename,
+               g_settings->getU64("debug_log_size_max") * 1000000);
+       g_logger.addOutputMaxLevel(&file_log_output, log_level);
+}
+
+static bool game_configure(GameParams *game_params, const Settings &cmd_args)
+{
+       game_configure_port(game_params, cmd_args);
+
+       if (!game_configure_world(game_params, cmd_args)) {
+               errorstream << "No world path specified or found." << std::endl;
+               return false;
+       }
+
+       game_configure_subgame(game_params, cmd_args);
+
+       return true;
+}
+
+static void game_configure_port(GameParams *game_params, const Settings &cmd_args)
+{
+       if (cmd_args.exists("port")) {
+               game_params->socket_port = cmd_args.getU16("port");
+       } else {
+               if (game_params->is_dedicated_server)
+                       game_params->socket_port = g_settings->getU16("port");
+               else
+                       game_params->socket_port = g_settings->getU16("remote_port");
+       }
+
+       if (game_params->socket_port == 0)
+               game_params->socket_port = DEFAULT_SERVER_PORT;
+}
+
+static bool game_configure_world(GameParams *game_params, const Settings &cmd_args)
+{
+       if (get_world_from_cmdline(game_params, cmd_args))
+               return true;
+
+       if (get_world_from_config(game_params, cmd_args))
+               return true;
+
+       return auto_select_world(game_params);
+}
+
+static bool get_world_from_cmdline(GameParams *game_params, const Settings &cmd_args)
+{
+       std::string commanded_world;
+
        // World name
-       std::string commanded_worldname = "";
-       if(cmd_args.exists("worldname"))
+       std::string commanded_worldname;
+       if (cmd_args.exists("worldname"))
                commanded_worldname = cmd_args.get("worldname");
-       
-       // Strip world.mt from commanded_world
-       {
-               std::string worldmt = "world.mt";
-               if(commanded_world.size() > worldmt.size() &&
-                               commanded_world.substr(commanded_world.size()-worldmt.size())
-                               == worldmt){
-                       dstream<<_("Supplied world.mt file - stripping it off.")<<std::endl;
-                       commanded_world = commanded_world.substr(
-                                       0, commanded_world.size()-worldmt.size());
-               }
-       }
-       
+
        // If a world name was specified, convert it to a path
-       if(commanded_worldname != ""){
+       if (!commanded_worldname.empty()) {
                // Get information about available worlds
                std::vector<WorldSpec> worldspecs = getAvailableWorlds();
                bool found = false;
-               for(u32 i=0; i<worldspecs.size(); i++){
-                       std::string name = worldspecs[i].name;
-                       if(name == commanded_worldname){
-                               if(commanded_world != ""){
-                                       dstream<<_("--worldname takes precedence over previously "
-                                                       "selected world.")<<std::endl;
-                               }
-                               commanded_world = worldspecs[i].path;
+               for (const WorldSpec &worldspec : worldspecs) {
+                       std::string name = worldspec.name;
+                       if (name == commanded_worldname) {
+                               dstream << _("Using world specified by --worldname on the "
+                                       "command line") << std::endl;
+                               commanded_world = worldspec.path;
                                found = true;
                                break;
                        }
                }
-               if(!found){
-                       dstream<<_("World")<<" '"<<commanded_worldname<<_("' not "
-                                       "available. Available worlds:")<<std::endl;
+               if (!found) {
+                       dstream << _("World") << " '" << commanded_worldname
+                               << _("' not available. Available worlds:") << std::endl;
                        print_worldspecs(worldspecs, dstream);
-                       return 1;
+                       return false;
                }
+
+               game_params->world_path = get_clean_world_path(commanded_world);
+               return !commanded_world.empty();
        }
 
-       // Gamespec
+       if (cmd_args.exists("world"))
+               commanded_world = cmd_args.get("world");
+       else if (cmd_args.exists("map-dir"))
+               commanded_world = cmd_args.get("map-dir");
+       else if (cmd_args.exists("nonopt0")) // First nameless argument
+               commanded_world = cmd_args.get("nonopt0");
+
+       game_params->world_path = get_clean_world_path(commanded_world);
+       return !commanded_world.empty();
+}
+
+static bool get_world_from_config(GameParams *game_params, const Settings &cmd_args)
+{
+       // World directory
+       std::string commanded_world;
+
+       if (g_settings->exists("map-dir"))
+               commanded_world = g_settings->get("map-dir");
+
+       game_params->world_path = get_clean_world_path(commanded_world);
+
+       return !commanded_world.empty();
+}
+
+static bool auto_select_world(GameParams *game_params)
+{
+       // No world was specified; try to select it automatically
+       // Get information about available worlds
+
+       std::vector<WorldSpec> worldspecs = getAvailableWorlds();
+       std::string world_path;
+
+       // If there is only a single world, use it
+       if (worldspecs.size() == 1) {
+               world_path = worldspecs[0].path;
+               dstream <<_("Automatically selecting world at") << " ["
+                       << world_path << "]" << std::endl;
+       // If there are multiple worlds, list them
+       } else if (worldspecs.size() > 1 && game_params->is_dedicated_server) {
+               std::cerr << _("Multiple worlds are available.") << std::endl;
+               std::cerr << _("Please select one using --worldname <name>"
+                               " or --world <path>") << std::endl;
+               print_worldspecs(worldspecs, std::cerr);
+               return false;
+       // If there are no worlds, automatically create a new one
+       } else {
+               // This is the ultimate default world path
+               world_path = porting::path_user + DIR_DELIM + "worlds" +
+                               DIR_DELIM + "world";
+               infostream << "Using default world at ["
+                          << world_path << "]" << std::endl;
+       }
+
+       assert(world_path != "");       // Post-condition
+       game_params->world_path = world_path;
+       return true;
+}
+
+static std::string get_clean_world_path(const std::string &path)
+{
+       const std::string worldmt = "world.mt";
+       std::string clean_path;
+
+       if (path.size() > worldmt.size()
+                       && path.substr(path.size() - worldmt.size()) == worldmt) {
+               dstream << _("Supplied world.mt file - stripping it off.") << std::endl;
+               clean_path = path.substr(0, path.size() - worldmt.size());
+       } else {
+               clean_path = path;
+       }
+       return path;
+}
+
+
+static bool game_configure_subgame(GameParams *game_params, const Settings &cmd_args)
+{
+       bool success;
+
+       success = get_game_from_cmdline(game_params, cmd_args);
+       if (!success)
+               success = determine_subgame(game_params);
+
+       return success;
+}
+
+static bool get_game_from_cmdline(GameParams *game_params, const Settings &cmd_args)
+{
        SubgameSpec commanded_gamespec;
-       if(cmd_args.exists("gameid")){
+
+       if (cmd_args.exists("gameid")) {
                std::string gameid = cmd_args.get("gameid");
                commanded_gamespec = findSubgame(gameid);
-               if(!commanded_gamespec.isValid()){
-                       errorstream<<"Game \""<<gameid<<"\" not found"<<std::endl;
-                       return 1;
+               if (!commanded_gamespec.isValid()) {
+                       errorstream << "Game \"" << gameid << "\" not found" << std::endl;
+                       return false;
                }
+               dstream << _("Using game specified by --gameid on the command line")
+                       << std::endl;
+               game_params->game_spec = commanded_gamespec;
+               return true;
        }
 
-       /*
-               Run dedicated server if asked to or no other option
-       */
-#ifdef SERVER
-       bool run_dedicated_server = true;
-#else
-       bool run_dedicated_server = cmd_args.getFlag("server");
-#endif
-       g_settings->set("server_dedicated", run_dedicated_server ? "true" : "false");
-       if(run_dedicated_server)
-       {
-               DSTACK("Dedicated server branch");
-               // Create time getter if built with Irrlicht
-#ifndef SERVER
-               g_timegetter = new SimpleTimeGetter();
-#endif
+       return false;
+}
 
-               // World directory
-               std::string world_path;
-               verbosestream<<_("Determining world path")<<std::endl;
-               bool is_legacy_world = false;
-               // If a world was commanded, use it
-               if(commanded_world != ""){
-                       world_path = commanded_world;
-                       infostream<<"Using commanded world path ["<<world_path<<"]"
-                                       <<std::endl;
-               }
-               // No world was specified; try to select it automatically
-               else
-               {
-                       // Get information about available worlds
-                       std::vector<WorldSpec> worldspecs = getAvailableWorlds();
-                       // If a world name was specified, select it
-                       if(commanded_worldname != ""){
-                               world_path = "";
-                               for(u32 i=0; i<worldspecs.size(); i++){
-                                       std::string name = worldspecs[i].name;
-                                       if(name == commanded_worldname){
-                                               world_path = worldspecs[i].path;
-                                               break;
-                                       }
-                               }
-                               if(world_path == ""){
-                                       dstream<<_("World")<<" '"<<commanded_worldname<<"' "<<_("not "
-                                                       "available. Available worlds:")<<std::endl;
-                                       print_worldspecs(worldspecs, dstream);
-                                       return 1;
-                               }
+static bool determine_subgame(GameParams *game_params)
+{
+       SubgameSpec gamespec;
+
+       assert(game_params->world_path != "");  // Pre-condition
+
+       // If world doesn't exist
+       if (!game_params->world_path.empty()
+               && !getWorldExists(game_params->world_path)) {
+               // Try to take gamespec from command line
+               if (game_params->game_spec.isValid()) {
+                       gamespec = game_params->game_spec;
+                       infostream << "Using commanded gameid [" << gamespec.id << "]" << std::endl;
+               } else { // Otherwise we will be using "minetest"
+                       gamespec = findSubgame(g_settings->get("default_game"));
+                       infostream << "Using default gameid [" << gamespec.id << "]" << std::endl;
+                       if (!gamespec.isValid()) {
+                               errorstream << "Game specified in default_game ["
+                                           << g_settings->get("default_game")
+                                           << "] is invalid." << std::endl;
+                               return false;
                        }
-                       // If there is only a single world, use it
-                       if(worldspecs.size() == 1){
-                               world_path = worldspecs[0].path;
-                               dstream<<_("Automatically selecting world at")<<" ["
-                                               <<world_path<<"]"<<std::endl;
-                       // If there are multiple worlds, list them
-                       } else if(worldspecs.size() > 1){
-                               dstream<<_("Multiple worlds are available.")<<std::endl;
-                               dstream<<_("Please select one using --worldname <name>"
-                                               " or --world <path>")<<std::endl;
-                               print_worldspecs(worldspecs, dstream);
-                               return 1;
-                       // If there are no worlds, automatically create a new one
-                       } else {
-                               // This is the ultimate default world path
-                               world_path = porting::path_user + DIR_DELIM + "worlds" +
-                                               DIR_DELIM + "world";
-                               infostream<<"Creating default world at ["
-                                               <<world_path<<"]"<<std::endl;
+               }
+       } else { // World exists
+               std::string world_gameid = getWorldGameId(game_params->world_path, false);
+               // If commanded to use a gameid, do so
+               if (game_params->game_spec.isValid()) {
+                       gamespec = game_params->game_spec;
+                       if (game_params->game_spec.id != world_gameid) {
+                               warningstream << "Using commanded gameid ["
+                                           << gamespec.id << "]" << " instead of world gameid ["
+                                           << world_gameid << "]" << std::endl;
                        }
+               } else {
+                       // If world contains an embedded game, use it;
+                       // Otherwise find world from local system.
+                       gamespec = findWorldSubgame(game_params->world_path);
+                       infostream << "Using world gameid [" << gamespec.id << "]" << std::endl;
                }
+       }
 
-               if(world_path == ""){
-                       errorstream<<"No world path specified or found."<<std::endl;
-                       return 1;
-               }
-               verbosestream<<_("Using world path")<<" ["<<world_path<<"]"<<std::endl;
-
-               // We need a gamespec.
-               SubgameSpec gamespec;
-               verbosestream<<_("Determining gameid/gamespec")<<std::endl;
-               // If world doesn't exist
-               if(!getWorldExists(world_path))
-               {
-                       // Try to take gamespec from command line
-                       if(commanded_gamespec.isValid()){
-                               gamespec = commanded_gamespec;
-                               infostream<<"Using commanded gameid ["<<gamespec.id<<"]"<<std::endl;
-                       }
-                       // Otherwise we will be using "minetest"
-                       else{
-                               gamespec = findSubgame(g_settings->get("default_game"));
-                               infostream<<"Using default gameid ["<<gamespec.id<<"]"<<std::endl;
+       if (!gamespec.isValid()) {
+               errorstream << "Game [" << gamespec.id << "] could not be found."
+                           << std::endl;
+               return false;
+       }
+
+       game_params->game_spec = gamespec;
+       return true;
+}
+
+
+/*****************************************************************************
+ * Dedicated server
+ *****************************************************************************/
+static bool run_dedicated_server(const GameParams &game_params, const Settings &cmd_args)
+{
+       verbosestream << _("Using world path") << " ["
+                     << game_params.world_path << "]" << std::endl;
+       verbosestream << _("Using gameid") << " ["
+                     << game_params.game_spec.id << "]" << std::endl;
+
+       // Bind address
+       std::string bind_str = g_settings->get("bind_address");
+       Address bind_addr(0, 0, 0, 0, game_params.socket_port);
+
+       if (g_settings->getBool("ipv6_server")) {
+               bind_addr.setAddress((IPv6AddressBytes*) NULL);
+       }
+       try {
+               bind_addr.Resolve(bind_str.c_str());
+       } catch (ResolveError &e) {
+               infostream << "Resolving bind address \"" << bind_str
+                          << "\" failed: " << e.what()
+                          << " -- Listening on all addresses." << std::endl;
+       }
+       if (bind_addr.isIPv6() && !g_settings->getBool("enable_ipv6")) {
+               errorstream << "Unable to listen on "
+                           << bind_addr.serializeString()
+                           << L" because IPv6 is disabled" << std::endl;
+               return false;
+       }
+
+       // Database migration/compression
+       if (cmd_args.exists("migrate"))
+               return migrate_map_database(game_params, cmd_args);
+
+       if (cmd_args.exists("migrate-players"))
+               return ServerEnvironment::migratePlayersDatabase(game_params, cmd_args);
+
+       if (cmd_args.exists("migrate-auth"))
+               return ServerEnvironment::migrateAuthDatabase(game_params, cmd_args);
+
+       if (cmd_args.exists("migrate-mod-storage"))
+               return Server::migrateModStorageDatabase(game_params, cmd_args);
+
+       if (cmd_args.getFlag("recompress"))
+               return recompress_map_database(game_params, cmd_args, bind_addr);
+
+       if (cmd_args.exists("terminal")) {
+#if USE_CURSES
+               bool name_ok = true;
+               std::string admin_nick = g_settings->get("name");
+
+               name_ok = name_ok && !admin_nick.empty();
+               name_ok = name_ok && string_allowed(admin_nick, PLAYERNAME_ALLOWED_CHARS);
+
+               if (!name_ok) {
+                       if (admin_nick.empty()) {
+                               errorstream << "No name given for admin. "
+                                       << "Please check your minetest.conf that it "
+                                       << "contains a 'name = ' to your main admin account."
+                                       << std::endl;
+                       } else {
+                               errorstream << "Name for admin '"
+                                       << admin_nick << "' is not valid. "
+                                       << "Please check that it only contains allowed characters. "
+                                       << "Valid characters are: " << PLAYERNAME_ALLOWED_CHARS_USER_EXPL
+                                       << std::endl;
                        }
+                       return false;
                }
-               // World exists
-               else
-               {
-                       std::string world_gameid = getWorldGameId(world_path, is_legacy_world);
-                       // If commanded to use a gameid, do so
-                       if(commanded_gamespec.isValid()){
-                               gamespec = commanded_gamespec;
-                               if(commanded_gamespec.id != world_gameid){
-                                       errorstream<<"WARNING: Using commanded gameid ["
-                                                       <<gamespec.id<<"]"<<" instead of world gameid ["
-                                                       <<world_gameid<<"]"<<std::endl;
-                               }
-                       } else{
-                               // If world contains an embedded game, use it;
-                               // Otherwise find world from local system.
-                               gamespec = findWorldSubgame(world_path);
-                               infostream<<"Using world gameid ["<<gamespec.id<<"]"<<std::endl;
-                       }
+               ChatInterface iface;
+               bool &kill = *porting::signal_handler_killstatus();
+
+               try {
+                       // Create server
+                       Server server(game_params.world_path, game_params.game_spec,
+                                       false, bind_addr, true, &iface);
+
+                       g_term_console.setup(&iface, &kill, admin_nick);
+
+                       g_term_console.start();
+
+                       server.start();
+                       // Run server
+                       dedicated_server_loop(server, kill);
+               } catch (const ModError &e) {
+                       g_term_console.stopAndWaitforThread();
+                       errorstream << "ModError: " << e.what() << std::endl;
+                       return false;
+               } catch (const ServerError &e) {
+                       g_term_console.stopAndWaitforThread();
+                       errorstream << "ServerError: " << e.what() << std::endl;
+                       return false;
                }
-               if(!gamespec.isValid()){
-                       errorstream<<"Subgame ["<<gamespec.id<<"] could not be found."
-                                       <<std::endl;
-                       return 1;
+
+               // Tell the console to stop, and wait for it to finish,
+               // only then leave context and free iface
+               g_term_console.stop();
+               g_term_console.wait();
+
+               g_term_console.clearKillStatus();
+       } else {
+#else
+               errorstream << "Cmd arg --terminal passed, but "
+                       << "compiled without ncurses. Ignoring." << std::endl;
+       } {
+#endif
+               try {
+                       // Create server
+                       Server server(game_params.world_path, game_params.game_spec, false,
+                               bind_addr, true);
+                       server.start();
+
+                       // Run server
+                       bool &kill = *porting::signal_handler_killstatus();
+                       dedicated_server_loop(server, kill);
+
+               } catch (const ModError &e) {
+                       errorstream << "ModError: " << e.what() << std::endl;
+                       return false;
+               } catch (const ServerError &e) {
+                       errorstream << "ServerError: " << e.what() << std::endl;
+                       return false;
                }
-               verbosestream<<_("Using gameid")<<" ["<<gamespec.id<<"]"<<std::endl;
+       }
 
-               // Create server
-               Server server(world_path, configpath, gamespec, false);
-               server.start(port);
-               
-               // Run server
-               dedicated_server_loop(server, kill);
+       return true;
+}
 
-               return 0;
+static bool migrate_map_database(const GameParams &game_params, const Settings &cmd_args)
+{
+       std::string migrate_to = cmd_args.get("migrate");
+       Settings world_mt;
+       std::string world_mt_path = game_params.world_path + DIR_DELIM + "world.mt";
+       if (!world_mt.readConfigFile(world_mt_path.c_str())) {
+               errorstream << "Cannot read world.mt!" << std::endl;
+               return false;
        }
 
-#ifndef SERVER // Exclude from dedicated server build
-
-       /*
-               More parameters
-       */
-       
-       std::string address = g_settings->get("address");
-       if(commanded_world != "")
-               address = "";
-       else if(cmd_args.exists("address"))
-               address = cmd_args.get("address");
-       
-       std::string playername = g_settings->get("name");
-       if(cmd_args.exists("name"))
-               playername = cmd_args.get("name");
-       
-       bool skip_main_menu = cmd_args.getFlag("go");
-
-       /*
-               Device initialization
-       */
-
-       // Resolution selection
-       
-       bool fullscreen = g_settings->getBool("fullscreen");
-       u16 screenW = g_settings->getU16("screenW");
-       u16 screenH = g_settings->getU16("screenH");
-
-       // bpp, fsaa, vsync
-
-       bool vsync = g_settings->getBool("vsync");
-       u16 bits = g_settings->getU16("fullscreen_bpp");
-       u16 fsaa = g_settings->getU16("fsaa");
-
-       // Determine driver
-
-       video::E_DRIVER_TYPE driverType;
-       
-       std::string driverstring = g_settings->get("video_driver");
-
-       if(driverstring == "null")
-               driverType = video::EDT_NULL;
-       else if(driverstring == "software")
-               driverType = video::EDT_SOFTWARE;
-       else if(driverstring == "burningsvideo")
-               driverType = video::EDT_BURNINGSVIDEO;
-       else if(driverstring == "direct3d8")
-               driverType = video::EDT_DIRECT3D8;
-       else if(driverstring == "direct3d9")
-               driverType = video::EDT_DIRECT3D9;
-       else if(driverstring == "opengl")
-               driverType = video::EDT_OPENGL;
-       else
-       {
-               errorstream<<"WARNING: Invalid video_driver specified; defaulting "
-                               "to opengl"<<std::endl;
-               driverType = video::EDT_OPENGL;
+       if (!world_mt.exists("backend")) {
+               errorstream << "Please specify your current backend in world.mt:"
+                       << std::endl
+                       << "    backend = {sqlite3|leveldb|redis|dummy|postgresql}"
+                       << std::endl;
+               return false;
        }
 
-       /*
-               Create device and exit if creation failed
-       */
-
-       MyEventReceiver receiver;
-
-       IrrlichtDevice *device;
-
-       SIrrlichtCreationParameters params = SIrrlichtCreationParameters();
-       params.DriverType    = driverType;
-       params.WindowSize    = core::dimension2d<u32>(screenW, screenH);
-       params.Bits          = bits;
-       params.AntiAlias     = fsaa;
-       params.Fullscreen    = fullscreen;
-       params.Stencilbuffer = false;
-       params.Vsync         = vsync;
-       params.EventReceiver = &receiver;
-
-       device = createDeviceEx(params);
-
-       if (device == 0)
-               return 1; // could not create selected driver.
-       
-       /*
-               Continue initialization
-       */
-
-       video::IVideoDriver* driver = device->getVideoDriver();
-
-       /*
-               This changes the minimum allowed number of vertices in a VBO.
-               Default is 500.
-       */
-       //driver->setMinHardwareBufferVertexCount(50);
-
-       // Create time getter
-       g_timegetter = new IrrlichtTimeGetter(device);
-       
-       // Create game callback for menus
-       g_gamecallback = new MainGameCallback(device);
-       
-       /*
-               Speed tests (done after irrlicht is loaded to get timer)
-       */
-       if(cmd_args.getFlag("speedtests"))
-       {
-               dstream<<"Running speed tests"<<std::endl;
-               SpeedTests();
-               return 0;
+       std::string backend = world_mt.get("backend");
+       if (backend == migrate_to) {
+               errorstream << "Cannot migrate: new backend is same"
+                       << " as the old one" << std::endl;
+               return false;
        }
-       
-       device->setResizable(true);
-
-       bool random_input = g_settings->getBool("random_input")
-                       || cmd_args.getFlag("random-input");
-       InputHandler *input = NULL;
-       if(random_input)
-               input = new RandomInputHandler();
-       else
-               input = new RealInputHandler(device, &receiver);
-       
-       scene::ISceneManager* smgr = device->getSceneManager();
-
-       guienv = device->getGUIEnvironment();
-       gui::IGUISkin* skin = guienv->getSkin();
-       #if USE_FREETYPE
-       std::string font_path = g_settings->get("font_path");
-       u16 font_size = g_settings->getU16("font_size");
-       gui::IGUIFont *font = gui::CGUITTFont::createTTFont(guienv, font_path.c_str(), font_size);
-       #else
-       gui::IGUIFont* font = guienv->getFont(getTexturePath("fontlucida.png").c_str());
-       #endif
-       if(font)
-               skin->setFont(font);
-       else
-               errorstream<<"WARNING: Font file was not found."
-                               " Using default font."<<std::endl;
-       // If font was not found, this will get us one
-       font = skin->getFont();
-       assert(font);
-       
-       u32 text_height = font->getDimension(L"Hello, world!").Height;
-       infostream<<"text_height="<<text_height<<std::endl;
-
-       //skin->setColor(gui::EGDC_BUTTON_TEXT, video::SColor(255,0,0,0));
-       skin->setColor(gui::EGDC_BUTTON_TEXT, video::SColor(255,255,255,255));
-       //skin->setColor(gui::EGDC_3D_HIGH_LIGHT, video::SColor(0,0,0,0));
-       //skin->setColor(gui::EGDC_3D_SHADOW, video::SColor(0,0,0,0));
-       skin->setColor(gui::EGDC_3D_HIGH_LIGHT, video::SColor(255,0,0,0));
-       skin->setColor(gui::EGDC_3D_SHADOW, video::SColor(255,0,0,0));
-       skin->setColor(gui::EGDC_HIGH_LIGHT, video::SColor(255,70,100,50));
-       skin->setColor(gui::EGDC_HIGH_LIGHT_TEXT, video::SColor(255,255,255,255));
-
-#if (IRRLICHT_VERSION_MAJOR >= 1 && IRRLICHT_VERSION_MINOR >= 8) || IRRLICHT_VERSION_MAJOR >= 2
-       // Irrlicht 1.8 input colours
-       skin->setColor(gui::EGDC_EDITABLE, video::SColor(255,128,128,128));
-       skin->setColor(gui::EGDC_FOCUSED_EDITABLE, video::SColor(255,96,134,49));
-#endif
 
-       /*
-               GUI stuff
-       */
-
-       ChatBackend chat_backend;
-
-       /*
-               If an error occurs, this is set to something and the
-               menu-game loop is restarted. It is then displayed before
-               the menu.
-       */
-       std::wstring error_message = L"";
-
-       // The password entered during the menu screen,
-       std::string password;
-
-       bool first_loop = true;
-
-       /*
-               Menu-game loop
-       */
-       while(device->run() && kill == false)
-       {
-               // Set the window caption
-               device->setWindowCaption((std::wstring(L"Minetest [")+wgettext("Main Menu")+L"]").c_str());
-
-               // This is used for catching disconnects
-               try
-               {
-
-                       /*
-                               Clear everything from the GUIEnvironment
-                       */
-                       guienv->clear();
-                       
-                       /*
-                               We need some kind of a root node to be able to add
-                               custom gui elements directly on the screen.
-                               Otherwise they won't be automatically drawn.
-                       */
-                       guiroot = guienv->addStaticText(L"",
-                                       core::rect<s32>(0, 0, 10000, 10000));
-                       
-                       SubgameSpec gamespec;
-                       WorldSpec worldspec;
-                       bool simple_singleplayer_mode = false;
-
-                       // These are set up based on the menu and other things
-                       std::string current_playername = "inv£lid";
-                       std::string current_password = "";
-                       std::string current_address = "does-not-exist";
-                       int current_port = 0;
-
-                       /*
-                               Out-of-game menu loop.
-
-                               Loop quits when menu returns proper parameters.
-                       */
-                       while(kill == false)
-                       {
-                               // If skip_main_menu, only go through here once
-                               if(skip_main_menu && !first_loop){
-                                       kill = true;
-                                       break;
-                               }
-                               first_loop = false;
-                               
-                               // Cursor can be non-visible when coming from the game
-                               device->getCursorControl()->setVisible(true);
-                               // Some stuff are left to scene manager when coming from the game
-                               // (map at least?)
-                               smgr->clear();
-                               
-                               // Initialize menu data
-                               MainMenuData menudata;
-                               if(g_settings->exists("selected_mainmenu_tab"))
-                                       menudata.selected_tab = g_settings->getS32("selected_mainmenu_tab");
-                               menudata.address = narrow_to_wide(address);
-                               menudata.name = narrow_to_wide(playername);
-                               menudata.port = narrow_to_wide(itos(port));
-                               if(cmd_args.exists("password"))
-                                       menudata.password = narrow_to_wide(cmd_args.get("password"));
-                               menudata.fancy_trees = g_settings->getBool("new_style_leaves");
-                               menudata.smooth_lighting = g_settings->getBool("smooth_lighting");
-                               menudata.clouds_3d = g_settings->getBool("enable_3d_clouds");
-                               menudata.opaque_water = g_settings->getBool("opaque_water");
-                               menudata.mip_map = g_settings->getBool("mip_map");
-                               menudata.anisotropic_filter = g_settings->getBool("anisotropic_filter");
-                               menudata.bilinear_filter = g_settings->getBool("bilinear_filter");
-                               menudata.trilinear_filter = g_settings->getBool("trilinear_filter");
-                               menudata.enable_shaders = g_settings->getS32("enable_shaders");
-                               menudata.preload_item_visuals = g_settings->getBool("preload_item_visuals");
-                               menudata.enable_particles = g_settings->getBool("enable_particles");
-                               driver->setTextureCreationFlag(video::ETCF_CREATE_MIP_MAPS, menudata.mip_map);
-                               menudata.creative_mode = g_settings->getBool("creative_mode");
-                               menudata.enable_damage = g_settings->getBool("enable_damage");
-                               menudata.enable_public = g_settings->getBool("server_announce");
-                               // Default to selecting nothing
-                               menudata.selected_world = -1;
-                               // Get world listing for the menu
-                               std::vector<WorldSpec> worldspecs = getAvailableWorlds();
-                               // If there is only one world, select it
-                               if(worldspecs.size() == 1){
-                                       menudata.selected_world = 0;
-                               }
-                               // Otherwise try to select according to selected_world_path
-                               else if(g_settings->exists("selected_world_path")){
-                                       std::string trypath = g_settings->get("selected_world_path");
-                                       for(u32 i=0; i<worldspecs.size(); i++){
-                                               if(worldspecs[i].path == trypath){
-                                                       menudata.selected_world = i;
-                                                       break;
-                                               }
-                                       }
-                               }
-                               // If a world was commanded, append and select it
-                               if(commanded_world != ""){
-                                       std::string gameid = getWorldGameId(commanded_world, true);
-                                       std::string name = _("[--world parameter]");
-                                       if(gameid == ""){
-                                               gameid = g_settings->get("default_game");
-                                               name += " [new]";
-                                       }
-                                       WorldSpec spec(commanded_world, name, gameid);
-                                       worldspecs.push_back(spec);
-                                       menudata.selected_world = worldspecs.size()-1;
-                               }
-                               // Copy worldspecs to menu
-                               menudata.worlds = worldspecs;
-
-                               if(skip_main_menu == false)
-                               {
-                                       video::IVideoDriver* driver = device->getVideoDriver();
-                                       
-                                       infostream<<"Waiting for other menus"<<std::endl;
-                                       while(device->run() && kill == false)
-                                       {
-                                               if(noMenuActive())
-                                                       break;
-                                               driver->beginScene(true, true,
-                                                               video::SColor(255,128,128,128));
-                                               drawMenuBackground(driver);
-                                               guienv->drawAll();
-                                               driver->endScene();
-                                               // On some computers framerate doesn't seem to be
-                                               // automatically limited
-                                               sleep_ms(25);
-                                       }
-                                       infostream<<"Waited for other menus"<<std::endl;
-
-                                       GUIMainMenu *menu =
-                                                       new GUIMainMenu(guienv, guiroot, -1, 
-                                                               &g_menumgr, &menudata, g_gamecallback);
-                                       menu->allowFocusRemoval(true);
-
-                                       if(error_message != L"")
-                                       {
-                                               verbosestream<<"error_message = "
-                                                               <<wide_to_narrow(error_message)<<std::endl;
-
-                                               GUIMessageMenu *menu2 =
-                                                               new GUIMessageMenu(guienv, guiroot, -1, 
-                                                                       &g_menumgr, error_message.c_str());
-                                               menu2->drop();
-                                               error_message = L"";
-                                       }
-
-                                       infostream<<"Created main menu"<<std::endl;
-
-                                       while(device->run() && kill == false)
-                                       {
-                                               if(menu->getStatus() == true)
-                                                       break;
-
-                                               //driver->beginScene(true, true, video::SColor(255,0,0,0));
-                                               driver->beginScene(true, true, video::SColor(255,128,128,128));
-
-                                               drawMenuBackground(driver);
-
-                                               guienv->drawAll();
-                                               
-                                               driver->endScene();
-                                               
-                                               // On some computers framerate doesn't seem to be
-                                               // automatically limited
-                                               sleep_ms(25);
-                                       }
-                                       
-                                       infostream<<"Dropping main menu"<<std::endl;
-
-                                       menu->drop();
-                               }
-
-                               playername = wide_to_narrow(menudata.name);
-                               password = translatePassword(playername, menudata.password);
-                               //infostream<<"Main: password hash: '"<<password<<"'"<<std::endl;
-
-                               address = wide_to_narrow(menudata.address);
-                               int newport = stoi(wide_to_narrow(menudata.port));
-                               if(newport != 0)
-                                       port = newport;
-                               simple_singleplayer_mode = menudata.simple_singleplayer_mode;
-                               // Save settings
-                               g_settings->setS32("selected_mainmenu_tab", menudata.selected_tab);
-                               g_settings->set("new_style_leaves", itos(menudata.fancy_trees));
-                               g_settings->set("smooth_lighting", itos(menudata.smooth_lighting));
-                               g_settings->set("enable_3d_clouds", itos(menudata.clouds_3d));
-                               g_settings->set("opaque_water", itos(menudata.opaque_water));
-
-                               g_settings->set("mip_map", itos(menudata.mip_map));
-                               g_settings->set("anisotropic_filter", itos(menudata.anisotropic_filter));
-                               g_settings->set("bilinear_filter", itos(menudata.bilinear_filter));
-                               g_settings->set("trilinear_filter", itos(menudata.trilinear_filter));
-
-                               g_settings->setS32("enable_shaders", menudata.enable_shaders);
-                               g_settings->set("preload_item_visuals", itos(menudata.preload_item_visuals));
-                               g_settings->set("enable_particles", itos(menudata.enable_particles));
-
-                               g_settings->set("creative_mode", itos(menudata.creative_mode));
-                               g_settings->set("enable_damage", itos(menudata.enable_damage));
-                               g_settings->set("server_announce", itos(menudata.enable_public));
-                               g_settings->set("name", playername);
-                               g_settings->set("address", address);
-                               g_settings->set("port", itos(port));
-                               if(menudata.selected_world != -1)
-                                       g_settings->set("selected_world_path",
-                                                       worldspecs[menudata.selected_world].path);
-
-                               // Break out of menu-game loop to shut down cleanly
-                               if(device->run() == false || kill == true)
-                                       break;
-                               
-                               current_playername = playername;
-                               current_password = password;
-                               current_address = address;
-                               current_port = port;
-
-                               // If using simple singleplayer mode, override
-                               if(simple_singleplayer_mode){
-                                       current_playername = "singleplayer";
-                                       current_password = "";
-                                       current_address = "";
-                                       current_port = 30011;
-                               }
-                               else if (address != "")
-                               {
-                                       ServerListSpec server;
-                                       server["name"] = menudata.servername;
-                                       server["address"] = wide_to_narrow(menudata.address);
-                                       server["port"] = wide_to_narrow(menudata.port);
-                                       server["description"] = menudata.serverdescription;
-                                       ServerList::insert(server);
-                               }
-                               
-                               // Set world path to selected one
-                               if(menudata.selected_world != -1){
-                                       worldspec = worldspecs[menudata.selected_world];
-                                       infostream<<"Selected world: "<<worldspec.name
-                                                       <<" ["<<worldspec.path<<"]"<<std::endl;
-                               }
-
-                               // Only refresh if so requested
-                               if(menudata.only_refresh){
-                                       infostream<<"Refreshing menu"<<std::endl;
-                                       continue;
-                               }
-                               
-                               // Create new world if requested
-                               if(menudata.create_world_name != L"")
-                               {
-                                       std::string path = porting::path_user + DIR_DELIM
-                                                       "worlds" + DIR_DELIM
-                                                       + wide_to_narrow(menudata.create_world_name);
-                                       // Create world if it doesn't exist
-                                       if(!initializeWorld(path, menudata.create_world_gameid)){
-                                               error_message = wgettext("Failed to initialize world");
-                                               errorstream<<wide_to_narrow(error_message)<<std::endl;
-                                               continue;
-                                       }
-                                       g_settings->set("selected_world_path", path);
-                                       continue;
-                               }
-
-                               // If local game
-                               if(current_address == "")
-                               {
-                                       if(menudata.selected_world == -1){
-                                               error_message = wgettext("No world selected and no address "
-                                                               "provided. Nothing to do.");
-                                               errorstream<<wide_to_narrow(error_message)<<std::endl;
-                                               continue;
-                                       }
-                                       // Load gamespec for required game
-                                       gamespec = findWorldSubgame(worldspec.path);
-                                       if(!gamespec.isValid() && !commanded_gamespec.isValid()){
-                                               error_message = wgettext("Could not find or load game \"")
-                                                               + narrow_to_wide(worldspec.gameid) + L"\"";
-                                               errorstream<<wide_to_narrow(error_message)<<std::endl;
-                                               continue;
-                                       }
-                                       if(commanded_gamespec.isValid() &&
-                                                       commanded_gamespec.id != worldspec.gameid){
-                                               errorstream<<"WARNING: Overriding gamespec from \""
-                                                               <<worldspec.gameid<<"\" to \""
-                                                               <<commanded_gamespec.id<<"\""<<std::endl;
-                                               gamespec = commanded_gamespec;
-                                       }
-
-                                       if(!gamespec.isValid()){
-                                               error_message = wgettext("Invalid gamespec.");
-                                               error_message += L" (world_gameid="
-                                                               +narrow_to_wide(worldspec.gameid)+L")";
-                                               errorstream<<wide_to_narrow(error_message)<<std::endl;
-                                               continue;
-                                       }
-                               }
-
-                               // Continue to game
-                               break;
-                       }
-                       
-                       // Break out of menu-game loop to shut down cleanly
-                       if(device->run() == false || kill == true)
-                               break;
+       MapDatabase *old_db = ServerMap::createDatabase(backend, game_params.world_path, world_mt),
+               *new_db = ServerMap::createDatabase(migrate_to, game_params.world_path, world_mt);
 
-                       /*
-                               Run game
-                       */
-                       the_game(
-                               kill,
-                               random_input,
-                               input,
-                               device,
-                               font,
-                               worldspec.path,
-                               current_playername,
-                               current_password,
-                               current_address,
-                               current_port,
-                               error_message,
-                               configpath,
-                               chat_backend,
-                               gamespec,
-                               simple_singleplayer_mode
-                       );
-
-               } //try
-               catch(con::PeerNotFoundException &e)
-               {
-                       error_message = wgettext("Connection error (timed out?)");
-                       errorstream<<wide_to_narrow(error_message)<<std::endl;
-               }
-               catch(ServerError &e)
-               {
-                       error_message = narrow_to_wide(e.what());
-                       errorstream<<wide_to_narrow(error_message)<<std::endl;
-               }
-               catch(ModError &e)
-               {
-                       errorstream<<e.what()<<std::endl;
-                       error_message = narrow_to_wide(e.what()) + wgettext("\nCheck debug.txt for details.");
+       u32 count = 0;
+       time_t last_update_time = 0;
+       bool &kill = *porting::signal_handler_killstatus();
+
+       std::vector<v3s16> blocks;
+       old_db->listAllLoadableBlocks(blocks);
+       new_db->beginSave();
+       for (std::vector<v3s16>::const_iterator it = blocks.begin(); it != blocks.end(); ++it) {
+               if (kill) return false;
+
+               std::string data;
+               old_db->loadBlock(*it, &data);
+               if (!data.empty()) {
+                       new_db->saveBlock(*it, data);
+               } else {
+                       errorstream << "Failed to load block " << PP(*it) << ", skipping it." << std::endl;
                }
-#ifdef NDEBUG
-               catch(std::exception &e)
-               {
-                       std::string narrow_message = "Some exception: \"";
-                       narrow_message += e.what();
-                       narrow_message += "\"";
-                       errorstream<<narrow_message<<std::endl;
-                       error_message = narrow_to_wide(narrow_message);
+               if (++count % 0xFF == 0 && time(NULL) - last_update_time >= 1) {
+                       std::cerr << " Migrated " << count << " blocks, "
+                               << (100.0 * count / blocks.size()) << "% completed.\r";
+                       new_db->endSave();
+                       new_db->beginSave();
+                       last_update_time = time(NULL);
                }
-#endif
+       }
+       std::cerr << std::endl;
+       new_db->endSave();
+       delete old_db;
+       delete new_db;
 
-               // If no main menu, show error and exit
-               if(skip_main_menu)
-               {
-                       if(error_message != L""){
-                               verbosestream<<"error_message = "
-                                               <<wide_to_narrow(error_message)<<std::endl;
-                               retval = 1;
-                       }
-                       break;
+       actionstream << "Successfully migrated " << count << " blocks" << std::endl;
+       world_mt.set("backend", migrate_to);
+       if (!world_mt.updateConfigFile(world_mt_path.c_str()))
+               errorstream << "Failed to update world.mt!" << std::endl;
+       else
+               actionstream << "world.mt updated" << std::endl;
+
+       return true;
+}
+
+static bool recompress_map_database(const GameParams &game_params, const Settings &cmd_args, const Address &addr)
+{
+       Settings world_mt;
+       const std::string world_mt_path = game_params.world_path + DIR_DELIM + "world.mt";
+
+       if (!world_mt.readConfigFile(world_mt_path.c_str())) {
+               errorstream << "Cannot read world.mt at " << world_mt_path << std::endl;
+               return false;
+       }
+       const std::string &backend = world_mt.get("backend");
+       Server server(game_params.world_path, game_params.game_spec, false, addr, false);
+       MapDatabase *db = ServerMap::createDatabase(backend, game_params.world_path, world_mt);
+
+       u32 count = 0;
+       u64 last_update_time = 0;
+       bool &kill = *porting::signal_handler_killstatus();
+       const u8 serialize_as_ver = SER_FMT_VER_HIGHEST_WRITE;
+
+       // This is ok because the server doesn't actually run
+       std::vector<v3s16> blocks;
+       db->listAllLoadableBlocks(blocks);
+       db->beginSave();
+       std::istringstream iss(std::ios_base::binary);
+       std::ostringstream oss(std::ios_base::binary);
+       for (auto it = blocks.begin(); it != blocks.end(); ++it) {
+               if (kill) return false;
+
+               std::string data;
+               db->loadBlock(*it, &data);
+               if (data.empty()) {
+                       errorstream << "Failed to load block " << PP(*it) << std::endl;
+                       return false;
                }
-       } // Menu-game loop
-       
-       delete input;
 
-       /*
-               In the end, delete the Irrlicht device.
-       */
-       device->drop();
+               iss.str(data);
+               iss.clear();
 
-#endif // !SERVER
-       
-       // Update configuration file
-       if(configpath != "")
-               g_settings->updateConfigFile(configpath.c_str());
-       
-       // Print modified quicktune values
-       {
-               bool header_printed = false;
-               std::vector<std::string> names = getQuicktuneNames();
-               for(u32 i=0; i<names.size(); i++){
-                       QuicktuneValue val = getQuicktuneValue(names[i]);
-                       if(!val.modified)
-                               continue;
-                       if(!header_printed){
-                               dstream<<"Modified quicktune values:"<<std::endl;
-                               header_printed = true;
-                       }
-                       dstream<<names[i]<<" = "<<val.getString()<<std::endl;
+               MapBlock mb(nullptr, v3s16(0,0,0), &server);
+               u8 ver = readU8(iss);
+               mb.deSerialize(iss, ver, true);
+
+               oss.str("");
+               oss.clear();
+               writeU8(oss, serialize_as_ver);
+               mb.serialize(oss, serialize_as_ver, true, -1);
+
+               db->saveBlock(*it, oss.str());
+
+               count++;
+               if (count % 0xFF == 0 && porting::getTimeS() - last_update_time >= 1) {
+                       std::cerr << " Recompressed " << count << " blocks, "
+                               << (100.0f * count / blocks.size()) << "% completed.\r";
+                       db->endSave();
+                       db->beginSave();
+                       last_update_time = porting::getTimeS();
                }
        }
+       std::cerr << std::endl;
+       db->endSave();
 
-       END_DEBUG_EXCEPTION_HANDLER(errorstream)
-       
-       debugstreams_deinit();
-       
-       return retval;
+       actionstream << "Done, " << count << " blocks were recompressed." << std::endl;
+       return true;
 }
-
-//END
-