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