src/main.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #ifdef _MSC_VER
  21 #ifndef SERVER // Dedicated server isn't linked with Irrlicht
  22         #pragma comment(lib, "Irrlicht.lib")
  23         // This would get rid of the console window
  24         //#pragma comment(linker, "/subsystem:windows /ENTRY:mainCRTStartup")
  25 #endif
  26         #pragma comment(lib, "zlibwapi.lib")
  27         #pragma comment(lib, "Shell32.lib")
  28 #endif
  29
  30 #include "irrlicht.h" // createDevice
  31
  32 #include "main.h"
  33 #include "mainmenumanager.h"
  34 #include "irrlichttypes_extrabloated.h"
  35 #include "debug.h"
  36 #include "test.h"
  37 #include "server.h"
  38 #include "filesys.h"
  39 #include "version.h"
  40 #include "guiMainMenu.h"
  41 #include "game.h"
  42 #include "defaultsettings.h"
  43 #include "gettext.h"
  44 #include "profiler.h"
  45 #include "log.h"
  46 #include "quicktune.h"
  47 #include "httpfetch.h"
  48 #include "guiEngine.h"
  49 #include "map.h"
  50 #include "mapsector.h"
  51 #include "fontengine.h"
  52 #include "gameparams.h"
  53 #include "database.h"
  54 #ifndef SERVER
  55 #include "client/clientlauncher.h"
  56 #endif
  57
  58 #ifdef HAVE_TOUCHSCREENGUI
  59 #include "touchscreengui.h"
  60 #endif
  61
  62 /*
  63         Settings.
  64         These are loaded from the config file.
  65 */
  66 static Settings main_settings;
  67 Settings *g_settings = &main_settings;
  68 std::string g_settings_path;
  69
  70 // Global profiler
  71 Profiler main_profiler;
  72 Profiler *g_profiler = &main_profiler;
  73
  74 // Menu clouds are created later
  75 Clouds *g_menuclouds = 0;
  76 irr::scene::ISceneManager *g_menucloudsmgr = 0;
  77
  78 /*
  79         Debug streams
  80 */
  81
  82 // Connection
  83 std::ostream *dout_con_ptr = &dummyout;
  84 std::ostream *derr_con_ptr = &verbosestream;
  85
  86 // Server
  87 std::ostream *dout_server_ptr = &infostream;
  88 std::ostream *derr_server_ptr = &errorstream;
  89
  90 // Client
  91 std::ostream *dout_client_ptr = &infostream;
  92 std::ostream *derr_client_ptr = &errorstream;
  93
  94 #define DEBUGFILE "debug.txt"
  95 #define DEFAULT_SERVER_PORT 30000
  96
  97 typedef std::map<std::string, ValueSpec> OptionList;
  98
  99 /**********************************************************************
 100  * Private functions
 101  **********************************************************************/
 102
 103 static bool get_cmdline_opts(int argc, char *argv[], Settings *cmd_args);
 104 static void set_allowed_options(OptionList *allowed_options);
 105
 106 static void print_help(const OptionList &allowed_options);
 107 static void print_allowed_options(const OptionList &allowed_options);
 108 static void print_version();
 109 static void print_worldspecs(const std::vector<WorldSpec> &worldspecs,
 110                                                          std::ostream &os);
 111 static void print_modified_quicktune_values();
 112
 113 static void list_game_ids();
 114 static void list_worlds();
 115 static void setup_log_params(const Settings &cmd_args);
 116 static bool create_userdata_path();
 117 static bool init_common(int *log_level, const Settings &cmd_args, int argc, char *argv[]);
 118 static void startup_message();
 119 static bool read_config_file(const Settings &cmd_args);
 120 static void init_debug_streams(int *log_level, const Settings &cmd_args);
 121
 122 static bool game_configure(GameParams *game_params, const Settings &cmd_args);
 123 static void game_configure_port(GameParams *game_params, const Settings &cmd_args);
 124
 125 static bool game_configure_world(GameParams *game_params, const Settings &cmd_args);
 126 static bool get_world_from_cmdline(GameParams *game_params, const Settings &cmd_args);
 127 static bool get_world_from_config(GameParams *game_params, const Settings &cmd_args);
 128 static bool auto_select_world(GameParams *game_params);
 129 static std::string get_clean_world_path(const std::string &path);
 130
 131 static bool game_configure_subgame(GameParams *game_params, const Settings &cmd_args);
 132 static bool get_game_from_cmdline(GameParams *game_params, const Settings &cmd_args);
 133 static bool determine_subgame(GameParams *game_params);
 134
 135 static bool run_dedicated_server(const GameParams &game_params, const Settings &cmd_args);
 136 static bool migrate_database(const GameParams &game_params, const Settings &cmd_args);
 137
 138 /**********************************************************************/
 139
 140 #ifndef SERVER
 141 /*
 142         Random stuff
 143 */
 144
 145 /* mainmenumanager.h */
 146
 147 gui::IGUIEnvironment* guienv = NULL;
 148 gui::IGUIStaticText *guiroot = NULL;
 149 MainMenuManager g_menumgr;
 150
 151 bool noMenuActive()
 152 {
 153         return (g_menumgr.menuCount() == 0);
 154 }
 155
 156 // Passed to menus to allow disconnecting and exiting
 157 MainGameCallback *g_gamecallback = NULL;
 158 #endif
 159
 160 /*
 161         gettime.h implementation
 162 */
 163
 164 #ifdef SERVER
 165
 166 u32 getTimeMs()
 167 {
 168         /* Use imprecise system calls directly (from porting.h) */
 169         return porting::getTime(PRECISION_MILLI);
 170 }
 171
 172 u32 getTime(TimePrecision prec)
 173 {
 174         return porting::getTime(prec);
 175 }
 176
 177 #endif
 178
 179 class StderrLogOutput: public ILogOutput
 180 {
 181 public:
 182         /* line: Full line with timestamp, level and thread */
 183         void printLog(const std::string &line)
 184         {
 185                 std::cerr << line << std::endl;
 186         }
 187 } main_stderr_log_out;
 188
 189 class DstreamNoStderrLogOutput: public ILogOutput
 190 {
 191 public:
 192         /* line: Full line with timestamp, level and thread */
 193         void printLog(const std::string &line)
 194         {
 195                 dstream_no_stderr << line << std::endl;
 196         }
 197 } main_dstream_no_stderr_log_out;
 198
 199 static OptionList allowed_options;
 200
 201 int main(int argc, char *argv[])
 202 {
 203         int retval;
 204
 205         debug_set_exception_handler();
 206
 207         log_add_output_maxlev(&main_stderr_log_out, LMT_ACTION);
 208         log_add_output_all_levs(&main_dstream_no_stderr_log_out);
 209
 210         log_register_thread("main");
 211
 212         Settings cmd_args;
 213         bool cmd_args_ok = get_cmdline_opts(argc, argv, &cmd_args);
 214         if (!cmd_args_ok
 215                         || cmd_args.getFlag("help")
 216                         || cmd_args.exists("nonopt1")) {
 217                 print_help(allowed_options);
 218                 return cmd_args_ok ? 0 : 1;
 219         }
 220
 221         if (cmd_args.getFlag("version")) {
 222                 print_version();
 223                 return 0;
 224         }
 225
 226         setup_log_params(cmd_args);
 227
 228         porting::signal_handler_init();
 229         porting::initializePaths();
 230
 231         if (!create_userdata_path()) {
 232                 errorstream << "Cannot create user data directory" << std::endl;
 233                 return 1;
 234         }
 235
 236         // Initialize debug stacks
 237         debug_stacks_init();
 238         DSTACK(__FUNCTION_NAME);
 239
 240         // Debug handler
 241         BEGIN_DEBUG_EXCEPTION_HANDLER
 242
 243         // List gameids if requested
 244         if (cmd_args.exists("gameid") && cmd_args.get("gameid") == "list") {
 245                 list_game_ids();
 246                 return 0;
 247         }
 248
 249         // List worlds if requested
 250         if (cmd_args.exists("world") && cmd_args.get("world") == "list") {
 251                 list_worlds();
 252                 return 0;
 253         }
 254
 255         GameParams game_params;
 256         if (!init_common(&game_params.log_level, cmd_args, argc, argv))
 257                 return 1;
 258
 259 #ifndef __ANDROID__
 260         // Run unit tests
 261         if (cmd_args.getFlag("run-unittests")) {
 262                 run_tests();
 263                 return 0;
 264         }
 265 #endif
 266
 267 #ifdef SERVER
 268         game_params.is_dedicated_server = true;
 269 #else
 270         game_params.is_dedicated_server = cmd_args.getFlag("server");
 271 #endif
 272
 273         if (!game_configure(&game_params, cmd_args))
 274                 return 1;
 275
 276         sanity_check(game_params.world_path != "");
 277
 278         infostream << "Using commanded world path ["
 279                    << game_params.world_path << "]" << std::endl;
 280
 281         //Run dedicated server if asked to or no other option
 282         g_settings->set("server_dedicated",
 283                         game_params.is_dedicated_server ? "true" : "false");
 284
 285         if (game_params.is_dedicated_server)
 286                 return run_dedicated_server(game_params, cmd_args) ? 0 : 1;
 287
 288 #ifndef SERVER
 289         ClientLauncher launcher;
 290         retval = launcher.run(game_params, cmd_args) ? 0 : 1;
 291 #else
 292         retval = 0;
 293 #endif
 294
 295         // Update configuration file
 296         if (g_settings_path != "")
 297                 g_settings->updateConfigFile(g_settings_path.c_str());
 298
 299         print_modified_quicktune_values();
 300
 301         // Stop httpfetch thread (if started)
 302         httpfetch_cleanup();
 303
 304         END_DEBUG_EXCEPTION_HANDLER(errorstream)
 305
 306         return retval;
 307 }
 308
 309
 310 /*****************************************************************************
 311  * Startup / Init
 312  *****************************************************************************/
 313
 314
 315 static bool get_cmdline_opts(int argc, char *argv[], Settings *cmd_args)
 316 {
 317         set_allowed_options(&allowed_options);
 318
 319         return cmd_args->parseCommandLine(argc, argv, allowed_options);
 320 }
 321
 322 static void set_allowed_options(OptionList *allowed_options)
 323 {
 324         allowed_options->clear();
 325
 326         allowed_options->insert(std::make_pair("help", ValueSpec(VALUETYPE_FLAG,
 327                         _("Show allowed options"))));
 328         allowed_options->insert(std::make_pair("version", ValueSpec(VALUETYPE_FLAG,
 329                         _("Show version information"))));
 330         allowed_options->insert(std::make_pair("config", ValueSpec(VALUETYPE_STRING,
 331                         _("Load configuration from specified file"))));
 332         allowed_options->insert(std::make_pair("port", ValueSpec(VALUETYPE_STRING,
 333                         _("Set network port (UDP)"))));
 334         allowed_options->insert(std::make_pair("run-unittests", ValueSpec(VALUETYPE_FLAG,
 335                         _("Run the unit tests and exit"))));
 336         allowed_options->insert(std::make_pair("map-dir", ValueSpec(VALUETYPE_STRING,
 337                         _("Same as --world (deprecated)"))));
 338         allowed_options->insert(std::make_pair("world", ValueSpec(VALUETYPE_STRING,
 339                         _("Set world path (implies local game) ('list' lists all)"))));
 340         allowed_options->insert(std::make_pair("worldname", ValueSpec(VALUETYPE_STRING,
 341                         _("Set world by name (implies local game)"))));
 342         allowed_options->insert(std::make_pair("quiet", ValueSpec(VALUETYPE_FLAG,
 343                         _("Print to console errors only"))));
 344         allowed_options->insert(std::make_pair("info", ValueSpec(VALUETYPE_FLAG,
 345                         _("Print more information to console"))));
 346         allowed_options->insert(std::make_pair("verbose",  ValueSpec(VALUETYPE_FLAG,
 347                         _("Print even more information to console"))));
 348         allowed_options->insert(std::make_pair("trace", ValueSpec(VALUETYPE_FLAG,
 349                         _("Print enormous amounts of information to log and console"))));
 350         allowed_options->insert(std::make_pair("logfile", ValueSpec(VALUETYPE_STRING,
 351                         _("Set logfile path ('' = no logging)"))));
 352         allowed_options->insert(std::make_pair("gameid", ValueSpec(VALUETYPE_STRING,
 353                         _("Set gameid (\"--gameid list\" prints available ones)"))));
 354         allowed_options->insert(std::make_pair("migrate", ValueSpec(VALUETYPE_STRING,
 355                         _("Migrate from current map backend to another (Only works when using minetestserver or with --server)"))));
 356 #ifndef SERVER
 357         allowed_options->insert(std::make_pair("videomodes", ValueSpec(VALUETYPE_FLAG,
 358                         _("Show available video modes"))));
 359         allowed_options->insert(std::make_pair("speedtests", ValueSpec(VALUETYPE_FLAG,
 360                         _("Run speed tests"))));
 361         allowed_options->insert(std::make_pair("address", ValueSpec(VALUETYPE_STRING,
 362                         _("Address to connect to. ('' = local game)"))));
 363         allowed_options->insert(std::make_pair("random-input", ValueSpec(VALUETYPE_FLAG,
 364                         _("Enable random user input, for testing"))));
 365         allowed_options->insert(std::make_pair("server", ValueSpec(VALUETYPE_FLAG,
 366                         _("Run dedicated server"))));
 367         allowed_options->insert(std::make_pair("name", ValueSpec(VALUETYPE_STRING,
 368                         _("Set player name"))));
 369         allowed_options->insert(std::make_pair("password", ValueSpec(VALUETYPE_STRING,
 370                         _("Set password"))));
 371         allowed_options->insert(std::make_pair("go", ValueSpec(VALUETYPE_FLAG,
 372                         _("Disable main menu"))));
 373 #endif
 374
 375 }
 376
 377 static void print_help(const OptionList &allowed_options)
 378 {
 379         dstream << _("Allowed options:") << std::endl;
 380         print_allowed_options(allowed_options);
 381 }
 382
 383 static void print_allowed_options(const OptionList &allowed_options)
 384 {
 385         for (OptionList::const_iterator i = allowed_options.begin();
 386                         i != allowed_options.end(); ++i) {
 387                 std::ostringstream os1(std::ios::binary);
 388                 os1 << "  --" << i->first;
 389                 if (i->second.type != VALUETYPE_FLAG)
 390                         os1 << _(" <value>");
 391
 392                 dstream << padStringRight(os1.str(), 24);
 393
 394                 if (i->second.help != NULL)
 395                         dstream << i->second.help;
 396
 397                 dstream << std::endl;
 398         }
 399 }
 400
 401 static void print_version()
 402 {
 403         dstream << PROJECT_NAME " " << g_version_hash << std::endl;
 404 #ifndef SERVER
 405         dstream << "Using Irrlicht " << IRRLICHT_SDK_VERSION << std::endl;
 406 #endif
 407         dstream << "Build info: " << g_build_info << std::endl;
 408 }
 409
 410 static void list_game_ids()
 411 {
 412         std::set<std::string> gameids = getAvailableGameIds();
 413         for (std::set<std::string>::const_iterator i = gameids.begin();
 414                         i != gameids.end(); i++)
 415                 dstream << (*i) <<std::endl;
 416 }
 417
 418 static void list_worlds()
 419 {
 420         dstream << _("Available worlds:") << std::endl;
 421         std::vector<WorldSpec> worldspecs = getAvailableWorlds();
 422         print_worldspecs(worldspecs, dstream);
 423 }
 424
 425 static void print_worldspecs(const std::vector<WorldSpec> &worldspecs,
 426                                                          std::ostream &os)
 427 {
 428         for (size_t i = 0; i < worldspecs.size(); i++) {
 429                 std::string name = worldspecs[i].name;
 430                 std::string path = worldspecs[i].path;
 431                 if (name.find(" ") != std::string::npos)
 432                         name = std::string("'") + name + "'";
 433                 path = std::string("'") + path + "'";
 434                 name = padStringRight(name, 14);
 435                 os << "  " << name << " " << path << std::endl;
 436         }
 437 }
 438
 439 static void print_modified_quicktune_values()
 440 {
 441         bool header_printed = false;
 442         std::vector<std::string> names = getQuicktuneNames();
 443
 444         for (u32 i = 0; i < names.size(); i++) {
 445                 QuicktuneValue val = getQuicktuneValue(names[i]);
 446                 if (!val.modified)
 447                         continue;
 448                 if (!header_printed) {
 449                         dstream << "Modified quicktune values:" << std::endl;
 450                         header_printed = true;
 451                 }
 452                 dstream << names[i] << " = " << val.getString() << std::endl;
 453         }
 454 }
 455
 456 static void setup_log_params(const Settings &cmd_args)
 457 {
 458         // Quiet mode, print errors only
 459         if (cmd_args.getFlag("quiet")) {
 460                 log_remove_output(&main_stderr_log_out);
 461                 log_add_output_maxlev(&main_stderr_log_out, LMT_ERROR);
 462         }
 463
 464         // If trace is enabled, enable logging of certain things
 465         if (cmd_args.getFlag("trace")) {
 466                 dstream << _("Enabling trace level debug output") << std::endl;
 467                 log_trace_level_enabled = true;
 468                 dout_con_ptr = &verbosestream; // this is somewhat old crap
 469                 socket_enable_debug_output = true; // socket doesn't use log.h
 470         }
 471
 472         // In certain cases, output info level on stderr
 473         if (cmd_args.getFlag("info") || cmd_args.getFlag("verbose") ||
 474                         cmd_args.getFlag("trace") || cmd_args.getFlag("speedtests"))
 475                 log_add_output(&main_stderr_log_out, LMT_INFO);
 476
 477         // In certain cases, output verbose level on stderr
 478         if (cmd_args.getFlag("verbose") || cmd_args.getFlag("trace"))
 479                 log_add_output(&main_stderr_log_out, LMT_VERBOSE);
 480 }
 481
 482 static bool create_userdata_path()
 483 {
 484         bool success;
 485
 486 #ifdef __ANDROID__
 487         porting::initAndroid();
 488
 489         porting::setExternalStorageDir(porting::jnienv);
 490         if (!fs::PathExists(porting::path_user)) {
 491                 success = fs::CreateDir(porting::path_user);
 492         } else {
 493                 success = true;
 494         }
 495         porting::copyAssets();
 496 #else
 497         // Create user data directory
 498         success = fs::CreateDir(porting::path_user);
 499 #endif
 500
 501         infostream << "path_share = " << porting::path_share << std::endl;
 502         infostream << "path_user  = " << porting::path_user << std::endl;
 503
 504         return success;
 505 }
 506
 507 static bool init_common(int *log_level, const Settings &cmd_args, int argc, char *argv[])
 508 {
 509         startup_message();
 510         set_default_settings(g_settings);
 511
 512         // Initialize sockets
 513         sockets_init();
 514         atexit(sockets_cleanup);
 515
 516         if (!read_config_file(cmd_args))
 517                 return false;
 518
 519         init_debug_streams(log_level, cmd_args);
 520
 521         // Initialize random seed
 522         srand(time(0));
 523         mysrand(time(0));
 524
 525         // Initialize HTTP fetcher
 526         httpfetch_init(g_settings->getS32("curl_parallel_limit"));
 527
 528 #ifdef _MSC_VER
 529         init_gettext((porting::path_share + DIR_DELIM + "locale").c_str(),
 530                 g_settings->get("language"), argc, argv);
 531 #else
 532         init_gettext((porting::path_share + DIR_DELIM + "locale").c_str(),
 533                 g_settings->get("language"));
 534 #endif
 535
 536         return true;
 537 }
 538
 539 static void startup_message()
 540 {
 541         infostream << PROJECT_NAME << " " << _("with")
 542                    << " SER_FMT_VER_HIGHEST_READ="
 543                << (int)SER_FMT_VER_HIGHEST_READ << ", "
 544                << g_build_info << std::endl;
 545 }
 546
 547 static bool read_config_file(const Settings &cmd_args)
 548 {
 549         // Path of configuration file in use
 550         sanity_check(g_settings_path == "");    // Sanity check
 551
 552         if (cmd_args.exists("config")) {
 553                 bool r = g_settings->readConfigFile(cmd_args.get("config").c_str());
 554                 if (!r) {
 555                         errorstream << "Could not read configuration from \""
 556                                     << cmd_args.get("config") << "\"" << std::endl;
 557                         return false;
 558                 }
 559                 g_settings_path = cmd_args.get("config");
 560         } else {
 561                 std::vector<std::string> filenames;
 562                 filenames.push_back(porting::path_user + DIR_DELIM + "minetest.conf");
 563                 // Legacy configuration file location
 564                 filenames.push_back(porting::path_user +
 565                                 DIR_DELIM + ".." + DIR_DELIM + "minetest.conf");
 566
 567 #if RUN_IN_PLACE
 568                 // Try also from a lower level (to aid having the same configuration
 569                 // for many RUN_IN_PLACE installs)
 570                 filenames.push_back(porting::path_user +
 571                                 DIR_DELIM + ".." + DIR_DELIM + ".." + DIR_DELIM + "minetest.conf");
 572 #endif
 573
 574                 for (size_t i = 0; i < filenames.size(); i++) {
 575                         bool r = g_settings->readConfigFile(filenames[i].c_str());
 576                         if (r) {
 577                                 g_settings_path = filenames[i];
 578                                 break;
 579                         }
 580                 }
 581
 582                 // If no path found, use the first one (menu creates the file)
 583                 if (g_settings_path == "")
 584                         g_settings_path = filenames[0];
 585         }
 586
 587         return true;
 588 }
 589
 590 static void init_debug_streams(int *log_level, const Settings &cmd_args)
 591 {
 592 #if RUN_IN_PLACE
 593         std::string logfile = DEBUGFILE;
 594 #else
 595         std::string logfile = porting::path_user + DIR_DELIM + DEBUGFILE;
 596 #endif
 597         if (cmd_args.exists("logfile"))
 598                 logfile = cmd_args.get("logfile");
 599
 600         log_remove_output(&main_dstream_no_stderr_log_out);
 601         *log_level = g_settings->getS32("debug_log_level");
 602
 603         if (*log_level == 0) //no logging
 604                 logfile = "";
 605         if (*log_level < 0) {
 606                 dstream << "WARNING: Supplied debug_log_level < 0; Using 0" << std::endl;
 607                 *log_level = 0;
 608         } else if (*log_level > LMT_NUM_VALUES) {
 609                 dstream << "WARNING: Supplied debug_log_level > " << LMT_NUM_VALUES
 610                         << "; Using " << LMT_NUM_VALUES << std::endl;
 611                 *log_level = LMT_NUM_VALUES;
 612         }
 613
 614         log_add_output_maxlev(&main_dstream_no_stderr_log_out,
 615                         (LogMessageLevel)(*log_level - 1));
 616
 617         debugstreams_init(false, logfile == "" ? NULL : logfile.c_str());
 618
 619         infostream << "logfile = " << logfile << std::endl;
 620
 621         atexit(debugstreams_deinit);
 622 }
 623
 624 static bool game_configure(GameParams *game_params, const Settings &cmd_args)
 625 {
 626         game_configure_port(game_params, cmd_args);
 627
 628         if (!game_configure_world(game_params, cmd_args)) {
 629                 errorstream << "No world path specified or found." << std::endl;
 630                 return false;
 631         }
 632
 633         game_configure_subgame(game_params, cmd_args);
 634
 635         return true;
 636 }
 637
 638 static void game_configure_port(GameParams *game_params, const Settings &cmd_args)
 639 {
 640         if (cmd_args.exists("port"))
 641                 game_params->socket_port = cmd_args.getU16("port");
 642         else
 643                 game_params->socket_port = g_settings->getU16("port");
 644
 645         if (game_params->socket_port == 0)
 646                 game_params->socket_port = DEFAULT_SERVER_PORT;
 647 }
 648
 649 static bool game_configure_world(GameParams *game_params, const Settings &cmd_args)
 650 {
 651         if (get_world_from_cmdline(game_params, cmd_args))
 652                 return true;
 653         if (get_world_from_config(game_params, cmd_args))
 654                 return true;
 655
 656         return auto_select_world(game_params);
 657 }
 658
 659 static bool get_world_from_cmdline(GameParams *game_params, const Settings &cmd_args)
 660 {
 661         std::string commanded_world = "";
 662
 663         // World name
 664         std::string commanded_worldname = "";
 665         if (cmd_args.exists("worldname"))
 666                 commanded_worldname = cmd_args.get("worldname");
 667
 668         // If a world name was specified, convert it to a path
 669         if (commanded_worldname != "") {
 670                 // Get information about available worlds
 671                 std::vector<WorldSpec> worldspecs = getAvailableWorlds();
 672                 bool found = false;
 673                 for (u32 i = 0; i < worldspecs.size(); i++) {
 674                         std::string name = worldspecs[i].name;
 675                         if (name == commanded_worldname) {
 676                                 dstream << _("Using world specified by --worldname on the "
 677                                         "command line") << std::endl;
 678                                 commanded_world = worldspecs[i].path;
 679                                 found = true;
 680                                 break;
 681                         }
 682                 }
 683                 if (!found) {
 684                         dstream << _("World") << " '" << commanded_worldname
 685                                 << _("' not available. Available worlds:") << std::endl;
 686                         print_worldspecs(worldspecs, dstream);
 687                         return false;
 688                 }
 689
 690                 game_params->world_path = get_clean_world_path(commanded_world);
 691                 return commanded_world != "";
 692         }
 693
 694         if (cmd_args.exists("world"))
 695                 commanded_world = cmd_args.get("world");
 696         else if (cmd_args.exists("map-dir"))
 697                 commanded_world = cmd_args.get("map-dir");
 698         else if (cmd_args.exists("nonopt0")) // First nameless argument
 699                 commanded_world = cmd_args.get("nonopt0");
 700
 701         game_params->world_path = get_clean_world_path(commanded_world);
 702         return commanded_world != "";
 703 }
 704
 705 static bool get_world_from_config(GameParams *game_params, const Settings &cmd_args)
 706 {
 707         // World directory
 708         std::string commanded_world = "";
 709
 710         if (g_settings->exists("map-dir"))
 711                 commanded_world = g_settings->get("map-dir");
 712
 713         game_params->world_path = get_clean_world_path(commanded_world);
 714
 715         return commanded_world != "";
 716 }
 717
 718 static bool auto_select_world(GameParams *game_params)
 719 {
 720         // No world was specified; try to select it automatically
 721         // Get information about available worlds
 722
 723         verbosestream << _("Determining world path") << std::endl;
 724
 725         std::vector<WorldSpec> worldspecs = getAvailableWorlds();
 726         std::string world_path;
 727
 728         // If there is only a single world, use it
 729         if (worldspecs.size() == 1) {
 730                 world_path = worldspecs[0].path;
 731                 dstream <<_("Automatically selecting world at") << " ["
 732                         << world_path << "]" << std::endl;
 733         // If there are multiple worlds, list them
 734         } else if (worldspecs.size() > 1 && game_params->is_dedicated_server) {
 735                 dstream << _("Multiple worlds are available.") << std::endl;
 736                 dstream << _("Please select one using --worldname <name>"
 737                                 " or --world <path>") << std::endl;
 738                 print_worldspecs(worldspecs, dstream);
 739                 return false;
 740         // If there are no worlds, automatically create a new one
 741         } else {
 742                 // This is the ultimate default world path
 743                 world_path = porting::path_user + DIR_DELIM + "worlds" +
 744                                 DIR_DELIM + "world";
 745                 infostream << "Creating default world at ["
 746                            << world_path << "]" << std::endl;
 747         }
 748
 749         assert(world_path != "");       // Post-condition
 750         game_params->world_path = world_path;
 751         return true;
 752 }
 753
 754 static std::string get_clean_world_path(const std::string &path)
 755 {
 756         const std::string worldmt = "world.mt";
 757         std::string clean_path;
 758
 759         if (path.size() > worldmt.size()
 760                         && path.substr(path.size() - worldmt.size()) == worldmt) {
 761                 dstream << _("Supplied world.mt file - stripping it off.") << std::endl;
 762                 clean_path = path.substr(0, path.size() - worldmt.size());
 763         } else {
 764                 clean_path = path;
 765         }
 766         return path;
 767 }
 768
 769
 770 static bool game_configure_subgame(GameParams *game_params, const Settings &cmd_args)
 771 {
 772         bool success;
 773
 774         success = get_game_from_cmdline(game_params, cmd_args);
 775         if (!success)
 776                 success = determine_subgame(game_params);
 777
 778         return success;
 779 }
 780
 781 static bool get_game_from_cmdline(GameParams *game_params, const Settings &cmd_args)
 782 {
 783         SubgameSpec commanded_gamespec;
 784
 785         if (cmd_args.exists("gameid")) {
 786                 std::string gameid = cmd_args.get("gameid");
 787                 commanded_gamespec = findSubgame(gameid);
 788                 if (!commanded_gamespec.isValid()) {
 789                         errorstream << "Game \"" << gameid << "\" not found" << std::endl;
 790                         return false;
 791                 }
 792                 dstream << _("Using game specified by --gameid on the command line")
 793                         << std::endl;
 794                 game_params->game_spec = commanded_gamespec;
 795                 return true;
 796         }
 797
 798         return false;
 799 }
 800
 801 static bool determine_subgame(GameParams *game_params)
 802 {
 803         SubgameSpec gamespec;
 804
 805         assert(game_params->world_path != "");  // Pre-condition
 806
 807         verbosestream << _("Determining gameid/gamespec") << std::endl;
 808         // If world doesn't exist
 809         if (game_params->world_path != ""
 810                         && !getWorldExists(game_params->world_path)) {
 811                 // Try to take gamespec from command line
 812                 if (game_params->game_spec.isValid()) {
 813                         gamespec = game_params->game_spec;
 814                         infostream << "Using commanded gameid [" << gamespec.id << "]" << std::endl;
 815                 } else { // Otherwise we will be using "minetest"
 816                         gamespec = findSubgame(g_settings->get("default_game"));
 817                         infostream << "Using default gameid [" << gamespec.id << "]" << std::endl;
 818                         if (!gamespec.isValid()) {
 819                                 errorstream << "Subgame specified in default_game ["
 820                                             << g_settings->get("default_game")
 821                                             << "] is invalid." << std::endl;
 822                                 return false;
 823                         }
 824                 }
 825         } else { // World exists
 826                 std::string world_gameid = getWorldGameId(game_params->world_path, false);
 827                 // If commanded to use a gameid, do so
 828                 if (game_params->game_spec.isValid()) {
 829                         gamespec = game_params->game_spec;
 830                         if (game_params->game_spec.id != world_gameid) {
 831                                 errorstream << "WARNING: Using commanded gameid ["
 832                                             << gamespec.id << "]" << " instead of world gameid ["
 833                                             << world_gameid << "]" << std::endl;
 834                         }
 835                 } else {
 836                         // If world contains an embedded game, use it;
 837                         // Otherwise find world from local system.
 838                         gamespec = findWorldSubgame(game_params->world_path);
 839                         infostream << "Using world gameid [" << gamespec.id << "]" << std::endl;
 840                 }
 841         }
 842
 843         if (!gamespec.isValid()) {
 844                 errorstream << "Subgame [" << gamespec.id << "] could not be found."
 845                             << std::endl;
 846                 return false;
 847         }
 848
 849         game_params->game_spec = gamespec;
 850         return true;
 851 }
 852
 853
 854 /*****************************************************************************
 855  * Dedicated server
 856  *****************************************************************************/
 857 static bool run_dedicated_server(const GameParams &game_params, const Settings &cmd_args)
 858 {
 859         DSTACK("Dedicated server branch");
 860
 861         verbosestream << _("Using world path") << " ["
 862                       << game_params.world_path << "]" << std::endl;
 863         verbosestream << _("Using gameid") << " ["
 864                       << game_params.game_spec.id << "]" << std::endl;
 865
 866         // Bind address
 867         std::string bind_str = g_settings->get("bind_address");
 868         Address bind_addr(0, 0, 0, 0, game_params.socket_port);
 869
 870         if (g_settings->getBool("ipv6_server")) {
 871                 bind_addr.setAddress((IPv6AddressBytes*) NULL);
 872         }
 873         try {
 874                 bind_addr.Resolve(bind_str.c_str());
 875         } catch (ResolveError &e) {
 876                 infostream << "Resolving bind address \"" << bind_str
 877                            << "\" failed: " << e.what()
 878                            << " -- Listening on all addresses." << std::endl;
 879         }
 880         if (bind_addr.isIPv6() && !g_settings->getBool("enable_ipv6")) {
 881                 errorstream << "Unable to listen on "
 882                             << bind_addr.serializeString()
 883                             << L" because IPv6 is disabled" << std::endl;
 884                 return false;
 885         }
 886
 887         // Database migration
 888         if (cmd_args.exists("migrate"))
 889                 return migrate_database(game_params, cmd_args);
 890
 891         // Create server
 892         Server server(game_params.world_path,
 893                         game_params.game_spec, false, bind_addr.isIPv6());
 894
 895         server.start(bind_addr);
 896
 897         // Run server
 898         bool &kill = *porting::signal_handler_killstatus();
 899         dedicated_server_loop(server, kill);
 900
 901         return true;
 902 }
 903
 904 static bool migrate_database(const GameParams &game_params, const Settings &cmd_args)
 905 {
 906         std::string migrate_to = cmd_args.get("migrate");
 907         Settings world_mt;
 908         std::string world_mt_path = game_params.world_path + DIR_DELIM + "world.mt";
 909         if (!world_mt.readConfigFile(world_mt_path.c_str())) {
 910                 errorstream << "Cannot read world.mt!" << std::endl;
 911                 return false;
 912         }
 913         if (!world_mt.exists("backend")) {
 914                 errorstream << "Please specify your current backend in world.mt:"
 915                         << std::endl
 916                         << "    backend = {sqlite3|leveldb|redis|dummy}"
 917                         << std::endl;
 918                 return false;
 919         }
 920         std::string backend = world_mt.get("backend");
 921         if (backend == migrate_to) {
 922                 errorstream << "Cannot migrate: new backend is same"
 923                         << " as the old one" << std::endl;
 924                 return false;
 925         }
 926         Database *old_db = ServerMap::createDatabase(backend, game_params.world_path, world_mt),
 927                 *new_db = ServerMap::createDatabase(migrate_to, game_params.world_path, world_mt);
 928
 929         u32 count = 0;
 930         time_t last_update_time = 0;
 931         bool &kill = *porting::signal_handler_killstatus();
 932
 933         std::vector<v3s16> blocks;
 934         old_db->listAllLoadableBlocks(blocks);
 935         new_db->beginSave();
 936         for (std::vector<v3s16>::const_iterator it = blocks.begin(); it != blocks.end(); ++it) {
 937                 if (kill) return false;
 938
 939                 const std::string &data = old_db->loadBlock(*it);
 940                 if (!data.empty()) {
 941                         new_db->saveBlock(*it, data);
 942                 } else {
 943                         errorstream << "Failed to load block " << PP(*it) << ", skipping it." << std::endl;
 944                 }
 945                 if (++count % 0xFF == 0 && time(NULL) - last_update_time >= 1) {
 946                         std::cerr << " Migrated " << count << " blocks, "
 947                                 << (100.0 * count / blocks.size()) << "% completed.\r";
 948                         new_db->endSave();
 949                         new_db->beginSave();
 950                         last_update_time = time(NULL);
 951                 }
 952         }
 953         std::cerr << std::endl;
 954         new_db->endSave();
 955         delete old_db;
 956         delete new_db;
 957
 958         actionstream << "Successfully migrated " << count << " blocks" << std::endl;
 959         world_mt.set("backend", migrate_to);
 960         if (!world_mt.updateConfigFile(world_mt_path.c_str()))
 961                 errorstream << "Failed to update world.mt!" << std::endl;
 962         else
 963                 actionstream << "world.mt updated" << std::endl;
 964
 965         return true;
 966 }
 967