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