src/inspircd.cpp

   1 /*
   2  * InspIRCd -- Internet Relay Chat Daemon
   3  *
   4  *   Copyright (C) 2012 William Pitcock <nenolod@dereferenced.org>
   5  *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
   6  *   Copyright (C) 2003-2008 Craig Edwards <craigedwards@brainbox.cc>
   7  *   Copyright (C) 2008 Uli Schlachter <psychon@znc.in>
   8  *   Copyright (C) 2006-2008 Robin Burchell <robin+git@viroteck.net>
   9  *   Copyright (C) 2006-2007 Oliver Lupton <oliverlupton@gmail.com>
  10  *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
  11  *   Copyright (C) 2007 Burlex <???@???>
  12  *   Copyright (C) 2003 Craig McLure <craig@chatspike.net>
  13  *   Copyright (C) 2003 randomdan <???@???>
  14  *
  15  * This file is part of InspIRCd.  InspIRCd is free software: you can
  16  * redistribute it and/or modify it under the terms of the GNU General Public
  17  * License as published by the Free Software Foundation, version 2.
  18  *
  19  * This program is distributed in the hope that it will be useful, but WITHOUT
  20  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  21  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  22  * details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  26  */
  27
  28
  29 #include "inspircd.h"
  30 #include <signal.h>
  31
  32 #ifndef _WIN32
  33         #include <unistd.h>
  34         #include <sys/resource.h>
  35         #include <dlfcn.h>
  36         #include <getopt.h>
  37         #include <pwd.h> // setuid
  38         #include <grp.h> // setgid
  39 #else
  40         WORD g_wOriginalColors;
  41         WORD g_wBackgroundColor;
  42         HANDLE g_hStdout;
  43 #endif
  44
  45 #include <fstream>
  46 #include <iostream>
  47 #include "xline.h"
  48 #include "exitcodes.h"
  49
  50 InspIRCd* ServerInstance = NULL;
  51
  52 /** Seperate from the other casemap tables so that code *can* still exclusively rely on RFC casemapping
  53  * if it must.
  54  *
  55  * This is provided as a pointer so that modules can change it to their custom mapping tables,
  56  * e.g. for national character support.
  57  */
  58 unsigned const char *national_case_insensitive_map = rfc_case_insensitive_map;
  59
  60
  61 /* Moved from exitcodes.h -- due to duplicate symbols -- Burlex
  62  * XXX this is a bit ugly. -- w00t
  63  */
  64 const char* ExitCodes[] =
  65 {
  66                 "No error",                                                             // 0
  67                 "DIE command",                                                  // 1
  68                 "Config file error",                                    // 2
  69                 "Logfile error",                                                // 3
  70                 "POSIX fork failed",                                    // 4
  71                 "Bad commandline parameters",                   // 5
  72                 "Can't write PID file",                                 // 6
  73                 "SocketEngine could not initialize",    // 7
  74                 "Refusing to start up as root",                 // 8
  75                 "Couldn't load module on startup",              // 9
  76                 "Received SIGTERM"                                              // 10
  77 };
  78
  79 namespace
  80 {
  81         void VoidSignalHandler(int);
  82
  83         // Warns a user running as root that they probably shouldn't.
  84         void CheckRoot()
  85         {
  86 #ifndef _WIN32
  87                 if (getegid() != 0 && geteuid() != 0)
  88                         return;
  89
  90                 std::cout << con_red << "Warning!" << con_reset << " You have started as root. Running as root is generally not required" << std::endl
  91                         << "and may allow an attacker to gain access to your system if they find a way to" << std::endl
  92                         << "exploit your IRC server." << std::endl
  93                         << std::endl;
  94                 if (isatty(fileno(stdout)))
  95                 {
  96                         std::cout << "InspIRCd will start in 30 seconds. If you are sure that you need to run as root" << std::endl
  97                                 << "then you can pass the " << con_bright << "--runasroot" << con_reset << " option to disable this wait." << std::endl;
  98                         sleep(30);
  99                 }
 100                 else
 101                 {
 102                         std::cout << "If you are sure that you need to run as root then you can pass the " << con_bright << "--runasroot" << con_reset << std::endl
 103                                 << "option to disable this error." << std::endl;
 104                                 ServerInstance->Exit(EXIT_STATUS_ROOT);
 105                 }
 106 #endif
 107         }
 108
 109         // Collects performance statistics for the STATS command.
 110         void CollectStats()
 111         {
 112 #ifndef _WIN32
 113                 static rusage ru;
 114                 if (getrusage(RUSAGE_SELF, &ru) == -1)
 115                         return; // Should never happen.
 116
 117                 ServerInstance->stats.LastSampled.tv_sec = ServerInstance->Time();
 118                 ServerInstance->stats.LastSampled.tv_nsec = ServerInstance->Time_ns();
 119                 ServerInstance->stats.LastCPU = ru.ru_utime;
 120 #else
 121                 if (!QueryPerformanceCounter(&ServerInstance->stats.LastSampled))
 122                         return; // Should never happen.
 123
 124                 FILETIME CreationTime;
 125                 FILETIME ExitTime;
 126                 FILETIME KernelTime;
 127                 FILETIME UserTime;
 128                 GetProcessTimes(GetCurrentProcess(), &CreationTime, &ExitTime, &KernelTime, &UserTime);
 129
 130                 ServerInstance->stats.LastCPU.dwHighDateTime = KernelTime.dwHighDateTime + UserTime.dwHighDateTime;
 131                 ServerInstance->stats.LastCPU.dwLowDateTime = KernelTime.dwLowDateTime + UserTime.dwLowDateTime;
 132 #endif
 133         }
 134
 135         // Deletes a pointer and then zeroes it.
 136         template<typename T>
 137         void DeleteZero(T*& pr)
 138         {
 139                 T* p = pr;
 140                 pr = NULL;
 141                 delete p;
 142         }
 143
 144         // Drops to the unprivileged user/group specified in <security:runas{user,group}>.
 145         void DropRoot()
 146         {
 147 #ifndef _WIN32
 148                 ConfigTag* security = ServerInstance->Config->ConfValue("security");
 149
 150                 const std::string SetGroup = security->getString("runasgroup");
 151                 if (!SetGroup.empty())
 152                 {
 153                         errno = 0;
 154                         if (setgroups(0, NULL) == -1)
 155                         {
 156                                 ServerInstance->Logs->Log("STARTUP", LOG_DEFAULT, "setgroups() failed (wtf?): %s", strerror(errno));
 157                                 exit(EXIT_STATUS_CONFIG);
 158                         }
 159
 160                         struct group* g = getgrnam(SetGroup.c_str());
 161                         if (!g)
 162                         {
 163                                 ServerInstance->Logs->Log("STARTUP", LOG_DEFAULT, "getgrnam(%s) failed (wrong group?): %s", SetGroup.c_str(), strerror(errno));
 164                                 exit(EXIT_STATUS_CONFIG);
 165                         }
 166
 167                         if (setgid(g->gr_gid) == -1)
 168                         {
 169                                 ServerInstance->Logs->Log("STARTUP", LOG_DEFAULT, "setgid(%d) failed (wrong group?): %s", g->gr_gid, strerror(errno));
 170                                 exit(EXIT_STATUS_CONFIG);
 171                         }
 172                 }
 173
 174                 const std::string SetUser = security->getString("runasuser");
 175                 if (!SetUser.empty())
 176                 {
 177                         errno = 0;
 178                         struct passwd* u = getpwnam(SetUser.c_str());
 179                         if (!u)
 180                         {
 181                                 ServerInstance->Logs->Log("STARTUP", LOG_DEFAULT, "getpwnam(%s) failed (wrong user?): %s", SetUser.c_str(), strerror(errno));
 182                                 exit(EXIT_STATUS_CONFIG);
 183                         }
 184
 185                         if (setuid(u->pw_uid) == -1)
 186                         {
 187                                 ServerInstance->Logs->Log("STARTUP", LOG_DEFAULT, "setuid(%d) failed (wrong user?): %s", u->pw_uid, strerror(errno));
 188                                 exit(EXIT_STATUS_CONFIG);
 189                         }
 190                 }
 191 #endif
 192         }
 193
 194         // Expands a path relative to the current working directory.
 195         std::string ExpandPath(const char* path)
 196         {
 197 #ifdef _WIN32
 198                 TCHAR configPath[MAX_PATH + 1];
 199                 if (GetFullPathName(path, MAX_PATH, configPath, NULL) > 0)
 200                         return configPath;
 201 #else
 202                 char configPath[PATH_MAX + 1];
 203                 if (realpath(path, configPath))
 204                         return configPath;
 205 #endif
 206                 return path;
 207         }
 208
 209         // Locates a config file on the file system.
 210         bool FindConfigFile(std::string& path)
 211         {
 212                 if (FileSystem::FileExists(path))
 213                         return true;
 214
 215 #ifdef _WIN32
 216                 // Windows hides file extensions by default so try appending .txt to the path
 217                 // to help users who have that feature enabled and can't create .conf files.
 218                 const std::string txtpath = path + ".txt";
 219                 if (FileSystem::FileExists(txtpath))
 220                 {
 221                         path.assign(txtpath);
 222                         return true;
 223                 }
 224 #endif
 225                 return false;
 226         }
 227
 228         // Attempts to fork into the background.
 229         void ForkIntoBackground()
 230         {
 231 #ifndef _WIN32
 232                 // We use VoidSignalHandler whilst forking to avoid breaking daemon scripts
 233                 // if the parent process exits with SIGTERM (15) instead of EXIT_STATUS_NOERROR (0).
 234                 signal(SIGTERM, VoidSignalHandler);
 235
 236                 errno = 0;
 237                 int childpid = fork();
 238                 if (childpid < 0)
 239                 {
 240                         ServerInstance->Logs->Log("STARTUP", LOG_DEFAULT, "fork() failed: %s", strerror(errno));
 241                         std::cout << con_red << "Error:" << con_reset << " unable to fork into background: " << strerror(errno);
 242                         ServerInstance->Exit(EXIT_STATUS_FORK);
 243                 }
 244                 else if (childpid > 0)
 245                 {
 246                         // Wait until the child process kills the parent so that the shell prompt
 247                         // doesnt display over the output. Sending a kill with a signal of 0 just
 248                         // checks that the child pid is still running. If it is not then an error
 249                         // happened and the parent should exit.
 250                         while (kill(childpid, 0) != -1)
 251                                 sleep(1);
 252                         exit(EXIT_STATUS_NOERROR);
 253                 }
 254                 else
 255                 {
 256                         setsid();
 257                         signal(SIGTERM, InspIRCd::SetSignal);
 258                         SocketEngine::RecoverFromFork();
 259                 }
 260 #endif
 261         }
 262
 263         // Increase the size of a core dump file to improve debugging problems.
 264         void IncreaseCoreDumpSize()
 265         {
 266 #ifndef _WIN32
 267                 errno = 0;
 268                 rlimit rl;
 269                 if (getrlimit(RLIMIT_CORE, &rl) == -1)
 270                 {
 271                         ServerInstance->Logs->Log("STARTUP", LOG_DEFAULT, "Unable to increase core dump size: getrlimit(RLIMIT_CORE) failed: %s", strerror(errno));
 272                         return;
 273                 }
 274
 275                 rl.rlim_cur = rl.rlim_max;
 276                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 277                         ServerInstance->Logs->Log("STARTUP", LOG_DEFAULT, "Unable to increase core dump size: setrlimit(RLIMIT_CORE) failed: %s", strerror(errno));
 278 #endif
 279         }
 280
 281         // Parses the command line options.
 282         void ParseOptions()
 283         {
 284                 int do_debug = 0, do_nofork = 0,    do_nolog = 0;
 285                 int do_nopid = 0, do_runasroot = 0, do_version = 0;
 286                 struct option longopts[] =
 287                 {
 288                         { "config",    required_argument, NULL,          'c' },
 289                         { "debug",     no_argument,       &do_debug,     1 },
 290                         { "nofork",    no_argument,       &do_nofork,    1 },
 291                         { "nolog",     no_argument,       &do_nolog,     1 },
 292                         { "nopid",     no_argument,       &do_nopid,     1 },
 293                         { "runasroot", no_argument,       &do_runasroot, 1 },
 294                         { "version",   no_argument,       &do_version,   1 },
 295                         { 0, 0, 0, 0 }
 296                 };
 297
 298                 char** argv = ServerInstance->Config->cmdline.argv;
 299                 int ret;
 300                 while ((ret = getopt_long(ServerInstance->Config->cmdline.argc, argv, ":c:", longopts, NULL)) != -1)
 301                 {
 302                         switch (ret)
 303                         {
 304                                 case 0:
 305                                         // A long option was specified.
 306                                         break;
 307
 308                                 case 'c':
 309                                         // The -c option was specified.
 310                                         ServerInstance->ConfigFileName = ExpandPath(optarg);
 311                                         break;
 312
 313                                 default:
 314                                         // An unknown option was specified.
 315                                         std::cout << con_red << "Error:" <<  con_reset << " unknown option '" << argv[optind - 1] << "'." << std::endl
 316                                                 << con_bright << "Usage: " << con_reset << argv[0] << " [--config <file>] [--debug] [--nofork] [--nolog]" << std::endl
 317                                                 << std::string(strlen(argv[0]) + 8, ' ') << "[--nopid] [--runasroot] [--version]" << std::endl;
 318                                         ServerInstance->Exit(EXIT_STATUS_ARGV);
 319                                         break;
 320                         }
 321                 }
 322
 323                 if (do_version)
 324                 {
 325                         std::cout << std::endl << INSPIRCD_VERSION << std::endl;
 326                         ServerInstance->Exit(EXIT_STATUS_NOERROR);
 327                 }
 328
 329                 // Store the relevant parsed arguments
 330                 ServerInstance->Config->cmdline.forcedebug = !!do_debug;
 331                 ServerInstance->Config->cmdline.nofork = !!do_nofork;
 332                 ServerInstance->Config->cmdline.runasroot = !!do_runasroot;
 333                 ServerInstance->Config->cmdline.writelog = !do_nolog;
 334                 ServerInstance->Config->cmdline.writepid = !do_nopid;
 335         }
 336         // Seeds the random number generator if applicable.
 337         void SeedRng(timespec ts)
 338         {
 339 #if defined _WIN32
 340                 srand(ts.tv_nsec ^ ts.tv_sec);
 341 #elif !defined HAS_ARC4RANDOM_BUF
 342                 srandom(ts.tv_nsec ^ ts.tv_sec);
 343 #endif
 344         }
 345
 346         // Sets handlers for various process signals.
 347         void SetSignals()
 348         {
 349 #ifndef _WIN32
 350                 signal(SIGALRM, SIG_IGN);
 351                 signal(SIGCHLD, SIG_IGN);
 352                 signal(SIGHUP, InspIRCd::SetSignal);
 353                 signal(SIGPIPE, SIG_IGN);
 354                 signal(SIGUSR1, SIG_IGN);
 355                 signal(SIGUSR2, SIG_IGN);
 356                 signal(SIGXFSZ, SIG_IGN);
 357 #endif
 358                 signal(SIGTERM, InspIRCd::SetSignal);
 359         }
 360
 361         void TryBindPorts()
 362         {
 363                 FailedPortList pl;
 364                 ServerInstance->BindPorts(pl);
 365
 366                 if (!pl.empty())
 367                 {
 368                         std::cout << con_red << "Warning!" << con_reset << " Some of your listener" << (pl.size() == 1 ? "s" : "") << " failed to bind:" << std::endl
 369                                 << std::endl;
 370
 371                         for (FailedPortList::const_iterator iter = pl.begin(); iter != pl.end(); ++iter)
 372                         {
 373                                 const FailedPort& fp = *iter;
 374                                 std::cout << "  " << con_bright << fp.sa.str() << con_reset << ": " << strerror(fp.error) << '.' << std::endl
 375                                         << "  " << "Created from <bind> tag at " << fp.tag->getTagLocation() << std::endl
 376                                         << std::endl;
 377                         }
 378
 379                         std::cout << con_bright << "Hints:" << con_reset << std::endl
 380                                 << "- For TCP/IP listeners try using a public IP address in <bind:address> instead" << std::endl
 381                                 << "  of * of leaving it blank." << std::endl
 382                                 << "- For UNIX socket listeners try enabling <bind:rewrite> to replace old sockets." << std::endl;
 383                 }
 384         }
 385
 386         // Required for returning the proper value of EXIT_SUCCESS for the parent process.
 387         void VoidSignalHandler(int)
 388         {
 389                 exit(EXIT_STATUS_NOERROR);
 390         }
 391 }
 392
 393 void InspIRCd::Cleanup()
 394 {
 395         // Close all listening sockets
 396         for (unsigned int i = 0; i < ports.size(); i++)
 397         {
 398                 ports[i]->cull();
 399                 delete ports[i];
 400         }
 401         ports.clear();
 402
 403         // Tell modules that we're shutting down.
 404         const std::string quitmsg = "Server shutting down";
 405         FOREACH_MOD(OnShutdown, (quitmsg));
 406
 407         // Disconnect all local users
 408         const UserManager::LocalList& list = Users.GetLocalUsers();
 409         while (!list.empty())
 410                 ServerInstance->Users.QuitUser(list.front(), quitmsg);
 411
 412         GlobalCulls.Apply();
 413         Modules->UnloadAll();
 414
 415         /* Delete objects dynamically allocated in constructor (destructor would be more appropriate, but we're likely exiting) */
 416         /* Must be deleted before modes as it decrements modelines */
 417         if (FakeClient)
 418         {
 419                 delete FakeClient->server;
 420                 FakeClient->cull();
 421         }
 422         DeleteZero(this->FakeClient);
 423         DeleteZero(this->XLines);
 424         DeleteZero(this->Config);
 425         SocketEngine::Deinit();
 426         Logs->CloseLogs();
 427 }
 428
 429 void InspIRCd::WritePID(const std::string& filename, bool exitonfail)
 430 {
 431 #ifndef _WIN32
 432         if (!ServerInstance->Config->cmdline.writepid)
 433         {
 434                 this->Logs->Log("STARTUP", LOG_DEFAULT, "--nopid specified on command line; PID file not written.");
 435                 return;
 436         }
 437
 438         std::string fname = ServerInstance->Config->Paths.PrependData(filename.empty() ? "inspircd.pid" : filename);
 439         std::ofstream outfile(fname.c_str());
 440         if (outfile.is_open())
 441         {
 442                 outfile << getpid();
 443                 outfile.close();
 444         }
 445         else
 446         {
 447                 if (exitonfail)
 448                         std::cout << "Failed to write PID-file '" << fname << "', exiting." << std::endl;
 449                 this->Logs->Log("STARTUP", LOG_DEFAULT, "Failed to write PID-file '%s'%s", fname.c_str(), (exitonfail ? ", exiting." : ""));
 450                 if (exitonfail)
 451                         Exit(EXIT_STATUS_PID);
 452         }
 453 #endif
 454 }
 455
 456 InspIRCd::InspIRCd(int argc, char** argv)
 457         : FakeClient(NULL)
 458         , ConfigFileName(INSPIRCD_CONFIG_PATH "/inspircd.conf")
 459         , ConfigThread(NULL)
 460         , Config(NULL)
 461         , XLines(NULL)
 462         , PI(&DefaultProtocolInterface)
 463         , GenRandom(&DefaultGenRandom)
 464         , IsChannel(&DefaultIsChannel)
 465         , IsNick(&DefaultIsNick)
 466         , IsIdent(&DefaultIsIdent)
 467 {
 468         ServerInstance = this;
 469
 470         UpdateTime();
 471         this->startup_time = TIME.tv_sec;
 472
 473         IncreaseCoreDumpSize();
 474         SeedRng(TIME);
 475         SocketEngine::Init();
 476
 477         this->Config = new ServerConfig;
 478         dynamic_reference_base::reset_all();
 479         this->XLines = new XLineManager;
 480
 481         this->Config->cmdline.argv = argv;
 482         this->Config->cmdline.argc = argc;
 483
 484 #ifdef _WIN32
 485         // Initialize the console values
 486         g_hStdout = GetStdHandle(STD_OUTPUT_HANDLE);
 487         CONSOLE_SCREEN_BUFFER_INFO bufinf;
 488         if(GetConsoleScreenBufferInfo(g_hStdout, &bufinf))
 489         {
 490                 g_wOriginalColors = bufinf.wAttributes & 0x00FF;
 491                 g_wBackgroundColor = bufinf.wAttributes & 0x00F0;
 492         }
 493         else
 494         {
 495                 g_wOriginalColors = FOREGROUND_RED|FOREGROUND_BLUE|FOREGROUND_GREEN;
 496                 g_wBackgroundColor = 0;
 497         }
 498 #endif
 499
 500         {
 501                 ServiceProvider* provs[] =
 502                 {
 503                         &rfcevents.numeric, &rfcevents.join, &rfcevents.part, &rfcevents.kick, &rfcevents.quit, &rfcevents.nick,
 504                         &rfcevents.mode, &rfcevents.topic, &rfcevents.privmsg, &rfcevents.invite, &rfcevents.ping, &rfcevents.pong,
 505                         &rfcevents.error
 506                 };
 507                 Modules.AddServices(provs, sizeof(provs)/sizeof(provs[0]));
 508         }
 509
 510         std::cout << con_green << "InspIRCd - Internet Relay Chat Daemon" << con_reset << std::endl
 511                 << "See " << con_green << "/INFO" << con_reset << " for contributors & authors" << std::endl
 512                 << std::endl;
 513
 514         ParseOptions();
 515         if (Config->cmdline.forcedebug)
 516         {
 517                 FileWriter* fw = new FileWriter(stdout, 1);
 518                 FileLogStream* fls = new FileLogStream(LOG_RAWIO, fw);
 519                 Logs->AddLogTypes("*", fls, true);
 520         }
 521
 522         if (!FindConfigFile(ConfigFileName))
 523         {
 524                 this->Logs->Log("STARTUP", LOG_DEFAULT, "Unable to open config file %s", ConfigFileName.c_str());
 525                 std::cout << "ERROR: Cannot open config file: " << ConfigFileName << std::endl << "Exiting..." << std::endl;
 526                 Exit(EXIT_STATUS_CONFIG);
 527         }
 528
 529         SetSignals();
 530         if (!Config->cmdline.runasroot)
 531                 CheckRoot();
 532         if (!Config->cmdline.nofork)
 533                 ForkIntoBackground();
 534
 535         std::cout << "InspIRCd Process ID: " << con_green << getpid() << con_reset << std::endl;
 536
 537         /* During startup we read the configuration now, not in
 538          * a seperate thread
 539          */
 540         this->Config->Read();
 541         this->Config->Apply(NULL, "");
 542         Logs->OpenFileLogs();
 543
 544         // If we don't have a SID, generate one based on the server name and the server description
 545         if (Config->sid.empty())
 546                 Config->sid = UIDGenerator::GenerateSID(Config->ServerName, Config->ServerDesc);
 547
 548         // Initialize the UID generator with our sid
 549         this->UIDGen.init(Config->sid);
 550
 551         // Create the server user for this server
 552         this->FakeClient = new FakeUser(Config->sid, Config->ServerName, Config->ServerDesc);
 553
 554         // This is needed as all new XLines are marked pending until ApplyLines() is called
 555         this->XLines->ApplyLines();
 556
 557         std::cout << std::endl;
 558
 559         this->Modules->LoadAll();
 560
 561         // Build ISupport as ModuleManager::LoadAll() does not do it
 562         this->ISupport.Build();
 563
 564         TryBindPorts();
 565
 566         std::cout << "InspIRCd is now running as '" << Config->ServerName << "'[" << Config->GetSID() << "] with " << SocketEngine::GetMaxFds() << " max open sockets" << std::endl;
 567
 568 #ifndef _WIN32
 569         if (!Config->cmdline.nofork)
 570         {
 571                 if (kill(getppid(), SIGTERM) == -1)
 572                 {
 573                         std::cout << "Error killing parent process: " << strerror(errno) << std::endl;
 574                         Logs->Log("STARTUP", LOG_DEFAULT, "Error killing parent process: %s",strerror(errno));
 575                 }
 576         }
 577
 578         /* Explicitly shut down stdio's stdin/stdout/stderr.
 579          *
 580          * The previous logic here was to only do this if stdio was connected to a controlling
 581          * terminal.  However, we must do this always to avoid information leaks and other
 582          * problems related to stdio.
 583          *
 584          * The only exception is if we are in debug mode.
 585          *
 586          *    -- nenolod
 587          */
 588         if ((!Config->cmdline.nofork) && (!Config->cmdline.forcedebug))
 589         {
 590                 int fd = open("/dev/null", O_RDWR);
 591
 592                 fclose(stdin);
 593                 fclose(stderr);
 594                 fclose(stdout);
 595
 596                 if (dup2(fd, STDIN_FILENO) < 0)
 597                         Logs->Log("STARTUP", LOG_DEFAULT, "Failed to dup /dev/null to stdin.");
 598                 if (dup2(fd, STDOUT_FILENO) < 0)
 599                         Logs->Log("STARTUP", LOG_DEFAULT, "Failed to dup /dev/null to stdout.");
 600                 if (dup2(fd, STDERR_FILENO) < 0)
 601                         Logs->Log("STARTUP", LOG_DEFAULT, "Failed to dup /dev/null to stderr.");
 602                 close(fd);
 603         }
 604         else
 605         {
 606                 Logs->Log("STARTUP", LOG_DEFAULT, "Keeping pseudo-tty open as we are running in the foreground.");
 607         }
 608 #else
 609         /* Set win32 service as running, if we are running as a service */
 610         SetServiceRunning();
 611
 612         // Handle forking
 613         if(!Config->cmdline.nofork)
 614         {
 615                 FreeConsole();
 616         }
 617
 618         QueryPerformanceFrequency(&stats.QPFrequency);
 619 #endif
 620
 621         WritePID(Config->PID);
 622         DropRoot();
 623
 624         Logs->Log("STARTUP", LOG_DEFAULT, "Startup complete as '%s'[%s], %lu max open sockets", Config->ServerName.c_str(),Config->GetSID().c_str(), SocketEngine::GetMaxFds());
 625 }
 626
 627 void InspIRCd::UpdateTime()
 628 {
 629 #if defined HAS_CLOCK_GETTIME
 630         clock_gettime(CLOCK_REALTIME, &TIME);
 631 #elif defined _WIN32
 632         SYSTEMTIME st;
 633         GetSystemTime(&st);
 634
 635         TIME.tv_sec = time(NULL);
 636         TIME.tv_nsec = st.wMilliseconds;
 637 #else
 638         struct timeval tv;
 639         gettimeofday(&tv, NULL);
 640
 641         TIME.tv_sec = tv.tv_sec;
 642         TIME.tv_nsec = tv.tv_usec * 1000;
 643 #endif
 644 }
 645
 646 void InspIRCd::Run()
 647 {
 648         UpdateTime();
 649         time_t OLDTIME = TIME.tv_sec;
 650
 651         while (true)
 652         {
 653                 /* Check if there is a config thread which has finished executing but has not yet been freed */
 654                 if (this->ConfigThread && this->ConfigThread->IsDone())
 655                 {
 656                         /* Rehash has completed */
 657                         this->Logs->Log("CONFIG", LOG_DEBUG, "Detected ConfigThread exiting, tidying up...");
 658
 659                         this->ConfigThread->Finish();
 660
 661                         ConfigThread->join();
 662                         delete ConfigThread;
 663                         ConfigThread = NULL;
 664                 }
 665
 666                 UpdateTime();
 667
 668                 /* Run background module timers every few seconds
 669                  * (the docs say modules shouldnt rely on accurate
 670                  * timing using this event, so we dont have to
 671                  * time this exactly).
 672                  */
 673                 if (TIME.tv_sec != OLDTIME)
 674                 {
 675                         CollectStats();
 676
 677                         if (Config->TimeSkipWarn)
 678                         {
 679                                 time_t timediff = TIME.tv_sec - OLDTIME;
 680
 681                                 if (timediff > Config->TimeSkipWarn)
 682                                         SNO->WriteToSnoMask('a', "\002Performance warning!\002 Server clock jumped forwards by %lu seconds!", timediff);
 683
 684                                 else if (timediff < -Config->TimeSkipWarn)
 685                                         SNO->WriteToSnoMask('a', "\002Performance warning!\002 Server clock jumped backwards by %lu seconds!", labs(timediff));
 686                         }
 687
 688                         OLDTIME = TIME.tv_sec;
 689
 690                         if ((TIME.tv_sec % 3600) == 0)
 691                                 FOREACH_MOD(OnGarbageCollect, ());
 692
 693                         Timers.TickTimers(TIME.tv_sec);
 694                         Users->DoBackgroundUserStuff();
 695
 696                         if ((TIME.tv_sec % 5) == 0)
 697                         {
 698                                 FOREACH_MOD(OnBackgroundTimer, (TIME.tv_sec));
 699                                 SNO->FlushSnotices();
 700                         }
 701                 }
 702
 703                 /* Call the socket engine to wait on the active
 704                  * file descriptors. The socket engine has everything's
 705                  * descriptors in its list... dns, modules, users,
 706                  * servers... so its nice and easy, just one call.
 707                  * This will cause any read or write events to be
 708                  * dispatched to their handlers.
 709                  */
 710                 SocketEngine::DispatchTrialWrites();
 711                 SocketEngine::DispatchEvents();
 712
 713                 /* if any users were quit, take them out */
 714                 GlobalCulls.Apply();
 715                 AtomicActions.Run();
 716
 717                 if (s_signal)
 718                 {
 719                         this->SignalHandler(s_signal);
 720                         s_signal = 0;
 721                 }
 722         }
 723 }
 724
 725 sig_atomic_t InspIRCd::s_signal = 0;
 726
 727 void InspIRCd::SetSignal(int signal)
 728 {
 729         s_signal = signal;
 730 }
 731
 732 /* On posix systems, the flow of the program starts right here, with
 733  * ENTRYPOINT being a #define that defines main(). On Windows, ENTRYPOINT
 734  * defines smain() and the real main() is in the service code under
 735  * win32service.cpp. This allows the service control manager to control
 736  * the process where we are running as a windows service.
 737  */
 738 ENTRYPOINT
 739 {
 740         new InspIRCd(argc, argv);
 741         ServerInstance->Run();
 742         delete ServerInstance;
 743         return 0;
 744 }