src/inspircd.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15 #include "configreader.h"
  16 #include <signal.h>
  17
  18 #ifndef WIN32
  19         #include <dirent.h>
  20         #include <unistd.h>
  21         #include <sys/resource.h>
  22         #include <dlfcn.h>
  23         #include <getopt.h>
  24
  25         /* Some systems don't define RUSAGE_SELF. This should fix them. */
  26         #ifndef RUSAGE_SELF
  27                 #define RUSAGE_SELF 0
  28         #endif
  29 #endif
  30
  31 #include <exception>
  32 #include <fstream>
  33 #include "modules.h"
  34 #include "mode.h"
  35 #include "xline.h"
  36 #include "socketengine.h"
  37 #include "inspircd_se_config.h"
  38 #include "socket.h"
  39 #include "typedefs.h"
  40 #include "command_parse.h"
  41 #include "exitcodes.h"
  42
  43 #ifdef WIN32
  44
  45 /* This MUST remain static and delcared outside the class, so that WriteProcessMemory can reference it properly */
  46 static DWORD owner_processid = 0;
  47
  48 DWORD WindowsForkStart(InspIRCd * Instance)
  49 {
  50         /* Windows implementation of fork() :P */
  51
  52         char module[MAX_PATH];
  53         if(!GetModuleFileName(NULL, module, MAX_PATH))
  54         {
  55                 printf("GetModuleFileName() failed.\n");
  56                 return false;
  57         }
  58
  59         STARTUPINFO startupinfo;
  60         PROCESS_INFORMATION procinfo;
  61         ZeroMemory(&startupinfo, sizeof(STARTUPINFO));
  62         ZeroMemory(&procinfo, sizeof(PROCESS_INFORMATION));
  63
  64         // Fill in the startup info struct
  65         GetStartupInfo(&startupinfo);
  66
  67         /* Default creation flags create the processes suspended */
  68         DWORD startupflags = CREATE_SUSPENDED;
  69
  70         /* On windows 2003/XP and above, we can use the value
  71          * CREATE_PRESERVE_CODE_AUTHZ_LEVEL which gives more access
  72          * to the process which we may require on these operating systems.
  73          */
  74         OSVERSIONINFO vi;
  75         vi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
  76         GetVersionEx(&vi);
  77         if ((vi.dwMajorVersion >= 5) && (vi.dwMinorVersion > 0))
  78                 startupflags |= CREATE_PRESERVE_CODE_AUTHZ_LEVEL;
  79
  80         // Launch our "forked" process.
  81         BOOL bSuccess = CreateProcess ( module, // Module (exe) filename
  82                 strdup(GetCommandLine()),       // Command line (exe plus parameters from the OS)
  83                                                 // NOTE: We cannot return the direct value of the
  84                                                 // GetCommandLine function here, as the pointer is
  85                                                 // passed straight to the child process, and will be
  86                                                 // invalid once we exit as it goes out of context.
  87                                                 // strdup() seems ok, though.
  88                 0,                              // PROCESS_SECURITY_ATTRIBUTES
  89                 0,                              // THREAD_SECURITY_ATTRIBUTES
  90                 TRUE,                           // We went to inherit handles.
  91                 startupflags,                   // Allow us full access to the process and suspend it.
  92                 0,                              // ENVIRONMENT
  93                 0,                              // CURRENT_DIRECTORY
  94                 &startupinfo,                   // startup info
  95                 &procinfo);                     // process info
  96
  97         if(!bSuccess)
  98         {
  99                 printf("CreateProcess() error: %s\n", dlerror());
 100                 return false;
 101         }
 102
 103         // Set the owner process id in the target process.
 104         SIZE_T written = 0;
 105         DWORD pid = GetCurrentProcessId();
 106         if(!WriteProcessMemory(procinfo.hProcess, &owner_processid, &pid, sizeof(DWORD), &written) || written != sizeof(DWORD))
 107         {
 108                 printf("WriteProcessMemory() failed: %s\n", dlerror());
 109                 return false;
 110         }
 111
 112         // Resume the other thread (let it start)
 113         ResumeThread(procinfo.hThread);
 114
 115         // Wait for the new process to kill us. If there is some error, the new process will end and we will end up at the next line.
 116         WaitForSingleObject(procinfo.hProcess, INFINITE);
 117
 118         // If we hit this it means startup failed, default to 14 if this fails.
 119         DWORD ExitCode = 14;
 120         GetExitCodeProcess(procinfo.hProcess, &ExitCode);
 121         CloseHandle(procinfo.hThread);
 122         CloseHandle(procinfo.hProcess);
 123         return ExitCode;
 124 }
 125
 126 void WindowsForkKillOwner(InspIRCd * Instance)
 127 {
 128         HANDLE hProcess = OpenProcess(PROCESS_TERMINATE, FALSE, owner_processid);
 129         if(!hProcess || !owner_processid)
 130         {
 131                 printf("Could not open process id %u: %s.\n", owner_processid, dlerror());
 132                 Instance->Exit(14);
 133         }
 134
 135         // die die die
 136         if(!TerminateProcess(hProcess, 0))
 137         {
 138                 printf("Could not TerminateProcess(): %s\n", dlerror());
 139                 Instance->Exit(14);
 140         }
 141
 142         CloseHandle(hProcess);
 143 }
 144
 145 #endif
 146
 147 using irc::sockets::NonBlocking;
 148 using irc::sockets::Blocking;
 149 using irc::sockets::insp_ntoa;
 150 using irc::sockets::insp_inaddr;
 151 using irc::sockets::insp_sockaddr;
 152
 153 InspIRCd* SI = NULL;
 154
 155 /* Burlex: Moved from exitcodes.h -- due to duplicate symbols */
 156 const char* ExitCodes[] =
 157 {
 158                 "No error", /* 0 */
 159                 "DIE command", /* 1 */
 160                 "execv() failed", /* 2 */
 161                 "Internal error", /* 3 */
 162                 "Config file error", /* 4 */
 163                 "Logfile error", /* 5 */
 164                 "POSIX fork failed", /* 6 */
 165                 "Bad commandline parameters", /* 7 */
 166                 "No ports could be bound", /* 8 */
 167                 "Can't write PID file", /* 9 */
 168                 "SocketEngine could not initialize", /* 10 */
 169                 "Refusing to start up as root", /* 11 */
 170                 "Found a <die> tag!", /* 12 */
 171                 "Couldn't load module on startup", /* 13 */
 172                 "Could not create windows forked process", /* 14 */
 173                 "Received SIGTERM", /* 15 */
 174 };
 175
 176 void InspIRCd::AddServerName(const std::string &servername)
 177 {
 178         servernamelist::iterator itr = servernames.begin();
 179         for(; itr != servernames.end(); ++itr)
 180                 if(**itr == servername)
 181                         return;
 182
 183         string * ns = new string(servername);
 184         servernames.push_back(ns);
 185 }
 186
 187 const char* InspIRCd::FindServerNamePtr(const std::string &servername)
 188 {
 189         servernamelist::iterator itr = servernames.begin();
 190         for(; itr != servernames.end(); ++itr)
 191                 if(**itr == servername)
 192                         return (*itr)->c_str();
 193
 194         servernames.push_back(new string(servername));
 195         itr = --servernames.end();
 196         return (*itr)->c_str();
 197 }
 198
 199 bool InspIRCd::FindServerName(const std::string &servername)
 200 {
 201         servernamelist::iterator itr = servernames.begin();
 202         for(; itr != servernames.end(); ++itr)
 203                 if(**itr == servername)
 204                         return true;
 205         return false;
 206 }
 207
 208 void InspIRCd::Exit(int status)
 209 {
 210 #ifdef WINDOWS
 211         CloseIPC();
 212 #endif
 213         if (SI)
 214         {
 215                 SI->SendError("Exiting with status " + ConvToStr(status) + " (" + std::string(ExitCodes[status]) + ")");
 216                 SI->Cleanup();
 217         }
 218         exit (status);
 219 }
 220
 221 void InspIRCd::Cleanup()
 222 {
 223         std::vector<std::string> mymodnames;
 224         int MyModCount = this->GetModuleCount();
 225
 226         for (unsigned int i = 0; i < Config->ports.size(); i++)
 227         {
 228                 /* This calls the constructor and closes the listening socket */
 229                 delete Config->ports[i];
 230         }
 231
 232         Config->ports.clear();
 233
 234         /* Close all client sockets, or the new process inherits them */
 235         for (std::vector<userrec*>::const_iterator i = this->local_users.begin(); i != this->local_users.end(); i++)
 236         {
 237                 (*i)->SetWriteError("Server shutdown");
 238                 (*i)->CloseSocket();
 239         }
 240
 241         /* We do this more than once, so that any service providers get a
 242          * chance to be unhooked by the modules using them, but then get
 243          * a chance to be removed themsleves.
 244          */
 245         for (int tries = 0; tries < 3; tries++)
 246         {
 247                 MyModCount = this->GetModuleCount();
 248                 mymodnames.clear();
 249
 250                 /* Unload all modules, so they get a chance to clean up their listeners */
 251                 for (int j = 0; j <= MyModCount; j++)
 252                         mymodnames.push_back(Config->module_names[j]);
 253
 254                 for (int k = 0; k <= MyModCount; k++)
 255                         this->UnloadModule(mymodnames[k].c_str());
 256         }
 257
 258         /* Close logging */
 259         this->Logger->Close();
 260
 261         /* Cleanup Server Names */
 262         for(servernamelist::iterator itr = servernames.begin(); itr != servernames.end(); ++itr)
 263                 delete (*itr);
 264
 265 #ifdef WINDOWS
 266         /* WSACleanup */
 267         WSACleanup();
 268 #endif
 269 }
 270
 271 void InspIRCd::Restart(const std::string &reason)
 272 {
 273         /* SendError flushes each client's queue,
 274          * regardless of writeability state
 275          */
 276         this->SendError(reason);
 277
 278         this->Cleanup();
 279
 280         /* Figure out our filename (if theyve renamed it, we're boned) */
 281         std::string me;
 282
 283 #ifdef WINDOWS
 284         char module[MAX_PATH];
 285         if (GetModuleFileName(NULL, module, MAX_PATH))
 286                 me = module;
 287 #else
 288         me = Config->MyDir + "/inspircd";
 289 #endif
 290
 291         if (execv(me.c_str(), Config->argv) == -1)
 292         {
 293                 /* Will raise a SIGABRT if not trapped */
 294                 throw CoreException(std::string("Failed to execv()! error: ") + strerror(errno));
 295         }
 296 }
 297
 298 void InspIRCd::Start()
 299 {
 300         printf_c("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
 301         printf_c("(C) InspIRCd Development Team.\033[0m\n\n");
 302         printf_c("Developers:\t\t\033[1;32mBrain, FrostyCoolSlug, w00t, Om, Special, pippijn, peavey, Burlex\033[0m\n");
 303         printf_c("Others:\t\t\t\033[1;32mSee /INFO Output\033[0m\n");
 304 }
 305
 306 void InspIRCd::Rehash(int status)
 307 {
 308         SI->WriteOpers("*** Rehashing config file %s due to SIGHUP",ServerConfig::CleanFilename(SI->ConfigFileName));
 309         SI->CloseLog();
 310         SI->OpenLog(SI->Config->argv, SI->Config->argc);
 311         SI->RehashUsersAndChans();
 312         FOREACH_MOD_I(SI, I_OnGarbageCollect, OnGarbageCollect());
 313         SI->Config->Read(false,NULL);
 314         SI->ResetMaxBans();
 315         SI->Res->Rehash();
 316         FOREACH_MOD_I(SI,I_OnRehash,OnRehash(NULL,""));
 317         SI->BuildISupport();
 318 }
 319
 320 void InspIRCd::ResetMaxBans()
 321 {
 322         for (chan_hash::const_iterator i = chanlist->begin(); i != chanlist->end(); i++)
 323                 i->second->ResetMaxBans();
 324 }
 325
 326
 327 /** Because hash_map doesnt free its buckets when we delete items (this is a 'feature')
 328  * we must occasionally rehash the hash (yes really).
 329  * We do this by copying the entries from the old hash to a new hash, causing all
 330  * empty buckets to be weeded out of the hash. We dont do this on a timer, as its
 331  * very expensive, so instead we do it when the user types /REHASH and expects a
 332  * short delay anyway.
 333  */
 334 void InspIRCd::RehashUsersAndChans()
 335 {
 336         user_hash* old_users = this->clientlist;
 337         chan_hash* old_chans = this->chanlist;
 338
 339         this->clientlist = new user_hash();
 340         this->chanlist = new chan_hash();
 341
 342         for (user_hash::const_iterator n = old_users->begin(); n != old_users->end(); n++)
 343                 this->clientlist->insert(*n);
 344
 345         delete old_users;
 346
 347         for (chan_hash::const_iterator n = old_chans->begin(); n != old_chans->end(); n++)
 348                 this->chanlist->insert(*n);
 349
 350         delete old_chans;
 351 }
 352
 353 void InspIRCd::CloseLog()
 354 {
 355         this->Logger->Close();
 356 }
 357
 358 void InspIRCd::SetSignals()
 359 {
 360 #ifndef WIN32
 361         signal(SIGALRM, SIG_IGN);
 362         signal(SIGHUP, InspIRCd::Rehash);
 363         signal(SIGPIPE, SIG_IGN);
 364         signal(SIGCHLD, SIG_IGN);
 365 #endif
 366         signal(SIGTERM, InspIRCd::Exit);
 367 }
 368
 369 void InspIRCd::QuickExit(int status)
 370 {
 371         exit(0);
 372 }
 373
 374 bool InspIRCd::DaemonSeed()
 375 {
 376 #ifdef WINDOWS
 377         printf_c("InspIRCd Process ID: \033[1;32m%lu\033[0m\n", GetCurrentProcessId());
 378         return true;
 379 #else
 380         signal(SIGTERM, InspIRCd::QuickExit);
 381
 382         int childpid;
 383         if ((childpid = fork ()) < 0)
 384                 return false;
 385         else if (childpid > 0)
 386         {
 387                 /* We wait here for the child process to kill us,
 388                  * so that the shell prompt doesnt come back over
 389                  * the output.
 390                  * Sending a kill with a signal of 0 just checks
 391                  * if the child pid is still around. If theyre not,
 392                  * they threw an error and we should give up.
 393                  */
 394                 while (kill(childpid, 0) != -1)
 395                         sleep(1);
 396                 exit(0);
 397         }
 398         setsid ();
 399         umask (007);
 400         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 401
 402         signal(SIGTERM, InspIRCd::Exit);
 403
 404         rlimit rl;
 405         if (getrlimit(RLIMIT_CORE, &rl) == -1)
 406         {
 407                 this->Log(DEFAULT,"Failed to getrlimit()!");
 408                 return false;
 409         }
 410         else
 411         {
 412                 rl.rlim_cur = rl.rlim_max;
 413                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
 414                         this->Log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 415         }
 416
 417         return true;
 418 #endif
 419 }
 420
 421 void InspIRCd::WritePID(const std::string &filename)
 422 {
 423         std::string fname = (filename.empty() ? "inspircd.pid" : filename);
 424         if (*(fname.begin()) != '/')
 425         {
 426                 std::string::size_type pos;
 427                 std::string confpath = this->ConfigFileName;
 428                 if ((pos = confpath.rfind("/")) != std::string::npos)
 429                 {
 430                         /* Leaves us with just the path */
 431                         fname = confpath.substr(0, pos) + std::string("/") + fname;
 432                 }
 433         }
 434         std::ofstream outfile(fname.c_str());
 435         if (outfile.is_open())
 436         {
 437                 outfile << getpid();
 438                 outfile.close();
 439         }
 440         else
 441         {
 442                 printf("Failed to write PID-file '%s', exiting.\n",fname.c_str());
 443                 this->Log(DEFAULT,"Failed to write PID-file '%s', exiting.",fname.c_str());
 444                 Exit(EXIT_STATUS_PID);
 445         }
 446 }
 447
 448 std::string InspIRCd::GetRevision()
 449 {
 450         return REVISION;
 451 }
 452
 453 InspIRCd::InspIRCd(int argc, char** argv)
 454         : ModCount(-1), GlobalCulls(this)
 455 {
 456         int found_ports = 0;
 457         FailedPortList pl;
 458         int do_version = 0, do_nofork = 0, do_debug = 0, do_nolog = 0, do_root = 0;    /* flag variables */
 459         char c = 0;
 460
 461         modules.resize(255);
 462         factory.resize(255);
 463         memset(&server, 0, sizeof(server));
 464         memset(&client, 0, sizeof(client));
 465
 466         this->unregistered_count = 0;
 467
 468         this->clientlist = new user_hash();
 469         this->chanlist = new chan_hash();
 470
 471         this->Config = new ServerConfig(this);
 472
 473         this->Config->argv = argv;
 474         this->Config->argc = argc;
 475
 476         chdir(Config->GetFullProgDir().c_str());
 477
 478         this->Config->opertypes.clear();
 479         this->Config->operclass.clear();
 480         this->SNO = new SnomaskManager(this);
 481         this->TIME = this->OLDTIME = this->startup_time = time(NULL);
 482         this->time_delta = 0;
 483         this->next_call = this->TIME + 3;
 484         srand(this->TIME);
 485
 486         *this->LogFileName = 0;
 487         strlcpy(this->ConfigFileName, CONFIG_FILE, MAXBUF);
 488
 489         struct option longopts[] =
 490         {
 491                 { "nofork",     no_argument,            &do_nofork,     1       },
 492                 { "logfile",    required_argument,      NULL,           'f'     },
 493                 { "config",     required_argument,      NULL,           'c'     },
 494                 { "debug",      no_argument,            &do_debug,      1       },
 495                 { "nolog",      no_argument,            &do_nolog,      1       },
 496                 { "runasroot",  no_argument,            &do_root,       1       },
 497                 { "version",    no_argument,            &do_version,    1       },
 498                 { 0, 0, 0, 0 }
 499         };
 500
 501         while ((c = getopt_long_only(argc, argv, ":f:", longopts, NULL)) != -1)
 502         {
 503                 switch (c)
 504                 {
 505                         case 'f':
 506                                 /* Log filename was set */
 507                                 strlcpy(LogFileName, optarg, MAXBUF);
 508                         break;
 509                         case 'c':
 510                                 /* Config filename was set */
 511                                 strlcpy(ConfigFileName, optarg, MAXBUF);
 512                         break;
 513                         case 0:
 514                                 /* getopt_long_only() set an int variable, just keep going */
 515                         break;
 516                         default:
 517                                 /* Unknown parameter! DANGER, INTRUDER.... err.... yeah. */
 518                                 printf("Usage: %s [--nofork] [--nolog] [--debug] [--logfile <filename>] [--runasroot] [--version] [--config <config>]\n", argv[0]);
 519                                 Exit(EXIT_STATUS_ARGV);
 520                         break;
 521                 }
 522         }
 523
 524         if (do_version)
 525         {
 526                 printf("\n%s r%s\n", VERSION, REVISION);
 527                 Exit(EXIT_STATUS_NOERROR);
 528         }
 529
 530 #ifdef WIN32
 531
 532         // Handle forking
 533         if(!do_nofork && !owner_processid)
 534         {
 535                 DWORD ExitCode = WindowsForkStart(this);
 536                 if(ExitCode)
 537                         Exit(ExitCode);
 538         }
 539
 540         // Set up winsock
 541         WSADATA wsadata;
 542         WSAStartup(MAKEWORD(2,0), &wsadata);
 543
 544 #endif
 545         if (!ServerConfig::FileExists(this->ConfigFileName))
 546         {
 547                 printf("ERROR: Cannot open config file: %s\nExiting...\n", this->ConfigFileName);
 548                 this->Log(DEFAULT,"Unable to open config file %s", this->ConfigFileName);
 549                 Exit(EXIT_STATUS_CONFIG);
 550         }
 551
 552         this->Start();
 553
 554         /* Set the finished argument values */
 555         Config->nofork = do_nofork;
 556         Config->forcedebug = do_debug;
 557         Config->writelog = !do_nolog;
 558
 559         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 560
 561         this->OpenLog(argv, argc);
 562
 563         this->stats = new serverstats();
 564         this->Timers = new TimerManager(this);
 565         this->Parser = new CommandParser(this);
 566         this->XLines = new XLineManager(this);
 567         Config->ClearStack();
 568         Config->Read(true, NULL);
 569
 570         if (!do_root)
 571                 this->CheckRoot();
 572         else
 573         {
 574                 printf("* WARNING * WARNING * WARNING * WARNING * WARNING * \n\n");
 575                 printf("YOU ARE RUNNING INSPIRCD AS ROOT. THIS IS UNSUPPORTED\n");
 576                 printf("AND IF YOU ARE HACKED, CRACKED, SPINDLED OR MUTILATED\n");
 577                 printf("OR ANYTHING ELSE UNEXPECTED HAPPENS TO YOU OR YOUR\n");
 578                 printf("SERVER, THEN IT IS YOUR OWN FAULT. IF YOU DID NOT MEAN\n");
 579                 printf("TO START INSPIRCD AS ROOT, HIT CTRL+C NOW AND RESTART\n");
 580                 printf("THE PROGRAM AS A NORMAL USER. YOU HAVE BEEN WARNED!\n");
 581                 printf("\nInspIRCd starting in 20 seconds, ctrl+c to abort...\n");
 582                 sleep(20);
 583         }
 584
 585         this->SetSignals();
 586
 587         if (!Config->nofork)
 588         {
 589                 if (!this->DaemonSeed())
 590                 {
 591                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 592                         Log(DEFAULT,"ERROR: could not go into daemon mode. Shutting down.");
 593                         Exit(EXIT_STATUS_FORK);
 594                 }
 595         }
 596
 597
 598         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 599          * initialize the socket engine.
 600          */
 601         SocketEngineFactory* SEF = new SocketEngineFactory();
 602         SE = SEF->Create(this);
 603         delete SEF;
 604
 605         this->Modes = new ModeParser(this);
 606         this->AddServerName(Config->ServerName);
 607         CheckDie();
 608         int bounditems = BindPorts(true, found_ports, pl);
 609
 610         for(int t = 0; t < 255; t++)
 611                 Config->global_implementation[t] = 0;
 612
 613         memset(&Config->implement_lists,0,sizeof(Config->implement_lists));
 614
 615         printf("\n");
 616
 617         this->Res = new DNS(this);
 618
 619         this->LoadAllModules();
 620         /* Just in case no modules were loaded - fix for bug #101 */
 621         this->BuildISupport();
 622         InitializeDisabledCommands(Config->DisabledCommands, this);
 623
 624         if ((Config->ports.size() == 0) && (found_ports > 0))
 625         {
 626                 printf("\nERROR: I couldn't bind any ports! Are you sure you didn't start InspIRCd twice?\n");
 627                 Log(DEFAULT,"ERROR: I couldn't bind any ports! Are you sure you didn't start InspIRCd twice?");
 628                 Exit(EXIT_STATUS_BIND);
 629         }
 630
 631         if (Config->ports.size() != (unsigned int)found_ports)
 632         {
 633                 printf("\nWARNING: Not all your client ports could be bound --\nstarting anyway with %d of %d client ports bound.\n\n", bounditems, found_ports);
 634                 printf("The following port(s) failed to bind:\n");
 635                 int j = 1;
 636                 for (FailedPortList::iterator i = pl.begin(); i != pl.end(); i++, j++)
 637                 {
 638                         printf("%d.\tIP: %s\tPort: %lu\n", j, i->first.empty() ? "<all>" : i->first.c_str(), (unsigned long)i->second);
 639                 }
 640         }
 641 #ifndef WINDOWS
 642         if (!Config->nofork)
 643         {
 644                 if (kill(getppid(), SIGTERM) == -1)
 645                 {
 646                         printf("Error killing parent process: %s\n",strerror(errno));
 647                         Log(DEFAULT,"Error killing parent process: %s",strerror(errno));
 648                 }
 649         }
 650
 651         if (isatty(0) && isatty(1) && isatty(2))
 652         {
 653                 /* We didn't start from a TTY, we must have started from a background process -
 654                  * e.g. we are restarting, or being launched by cron. Dont kill parent, and dont
 655                  * close stdin/stdout
 656                  */
 657                 if (!do_nofork)
 658                 {
 659                         fclose(stdin);
 660                         fclose(stderr);
 661                         fclose(stdout);
 662                 }
 663                 else
 664                 {
 665                         Log(DEFAULT,"Keeping pseudo-tty open as we are running in the foreground.");
 666                 }
 667         }
 668 #else
 669         InitIPC();
 670         if(!Config->nofork)
 671         {
 672                 WindowsForkKillOwner(this);
 673                 FreeConsole();
 674         }
 675 #endif
 676         printf("\nInspIRCd is now running!\n");
 677         Log(DEFAULT,"Startup complete.");
 678
 679         this->WritePID(Config->PID);
 680 }
 681
 682 std::string InspIRCd::GetVersionString()
 683 {
 684         char versiondata[MAXBUF];
 685         char dnsengine[] = "singlethread-object";
 686
 687         if (*Config->CustomVersion)
 688         {
 689                 snprintf(versiondata,MAXBUF,"%s %s :%s",VERSION,Config->ServerName,Config->CustomVersion);
 690         }
 691         else
 692         {
 693                 snprintf(versiondata,MAXBUF,"%s %s :%s [FLAGS=%s,%s,%s]",VERSION,Config->ServerName,SYSTEM,REVISION,SE->GetName().c_str(),dnsengine);
 694         }
 695         return versiondata;
 696 }
 697
 698 void InspIRCd::BuildISupport()
 699 {
 700         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 701         std::stringstream v;
 702         v << "WALLCHOPS WALLVOICES MODES=" << MAXMODES-1 << " CHANTYPES=# PREFIX=" << this->Modes->BuildPrefixes() << " MAP MAXCHANNELS=" << Config->MaxChans << " MAXBANS=60 VBANLIST NICKLEN=" << NICKMAX-1;
 703         v << " CASEMAPPING=rfc1459 STATUSMSG=@%+ CHARSET=ascii TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=" << Config->MaxTargets << " AWAYLEN=";
 704         v << MAXAWAY << " CHANMODES=" << this->Modes->ChanModes() << " FNC NETWORK=" << Config->Network << " MAXPARA=32 ELIST=MU";
 705         Config->data005 = v.str();
 706         FOREACH_MOD_I(this,I_On005Numeric,On005Numeric(Config->data005));
 707         Config->Update005();
 708 }
 709
 710 void InspIRCd::DoOneIteration(bool process_module_sockets)
 711 {
 712 #ifndef WIN32
 713         static rusage ru;
 714 #else
 715         static time_t uptime;
 716         static struct tm * stime;
 717         static char window_title[100];
 718 #endif
 719
 720         /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
 721          * Once per loop iteration is pleanty.
 722          */
 723         OLDTIME = TIME;
 724         TIME = time(NULL);
 725
 726         /* Run background module timers every few seconds
 727          * (the docs say modules shouldnt rely on accurate
 728          * timing using this event, so we dont have to
 729          * time this exactly).
 730          */
 731         if (TIME != OLDTIME)
 732         {
 733                 if (TIME < OLDTIME)
 734                         WriteOpers("*** \002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %d secs.",abs(OLDTIME-TIME));
 735                 if ((TIME % 3600) == 0)
 736                 {
 737                         this->RehashUsersAndChans();
 738                         FOREACH_MOD_I(this, I_OnGarbageCollect, OnGarbageCollect());
 739                 }
 740                 Timers->TickTimers(TIME);
 741                 this->DoBackgroundUserStuff(TIME);
 742
 743                 if ((TIME % 5) == 0)
 744                 {
 745                         XLines->expire_lines();
 746                         FOREACH_MOD_I(this,I_OnBackgroundTimer,OnBackgroundTimer(TIME));
 747                         Timers->TickMissedTimers(TIME);
 748                 }
 749 #ifndef WIN32
 750                 /* Same change as in cmd_stats.cpp, use RUSAGE_SELF rather than '0' -- Om */
 751                 if (!getrusage(RUSAGE_SELF, &ru))
 752                 {
 753                         gettimeofday(&this->stats->LastSampled, NULL);
 754                         this->stats->LastCPU = ru.ru_utime;
 755                 }
 756 #else
 757                 CheckIPC(this);
 758
 759                 if(Config->nofork)
 760                 {
 761                         uptime = Time() - startup_time;
 762                         stime = gmtime(&uptime);
 763                         snprintf(window_title, 100, "InspIRCd - %u clients, %u accepted connections - Up %u days, %.2u:%.2u:%.2u",
 764                                 LocalUserCount(), stats->statsAccept, stime->tm_yday, stime->tm_hour, stime->tm_min, stime->tm_sec);
 765                         SetConsoleTitle(window_title);
 766                 }
 767 #endif
 768         }
 769
 770         /* Call the socket engine to wait on the active
 771          * file descriptors. The socket engine has everything's
 772          * descriptors in its list... dns, modules, users,
 773          * servers... so its nice and easy, just one call.
 774          * This will cause any read or write events to be
 775          * dispatched to their handlers.
 776          */
 777         SE->DispatchEvents();
 778
 779         /* if any users was quit, take them out */
 780         GlobalCulls.Apply();
 781
 782         /* If any inspsockets closed, remove them */
 783         this->InspSocketCull();
 784 }
 785
 786 void InspIRCd::InspSocketCull()
 787 {
 788         for (std::map<InspSocket*,InspSocket*>::iterator x = SocketCull.begin(); x != SocketCull.end(); ++x)
 789         {
 790                 SE->DelFd(x->second);
 791                 x->second->Close();
 792                 delete x->second;
 793         }
 794         SocketCull.clear();
 795 }
 796
 797 int InspIRCd::Run()
 798 {
 799         while (true)
 800         {
 801                 DoOneIteration(true);
 802         }
 803         /* This is never reached -- we hope! */
 804         return 0;
 805 }
 806
 807 /**********************************************************************************/
 808
 809 /**
 810  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
 811  */
 812
 813 int main(int argc, char** argv)
 814 {
 815         SI = new InspIRCd(argc, argv);
 816         SI->Run();
 817         delete SI;
 818         return 0;
 819 }
 820
 821 /* this returns true when all modules are satisfied that the user should be allowed onto the irc server
 822  * (until this returns true, a user will block in the waiting state, waiting to connect up to the
 823  * registration timeout maximum seconds)
 824  */
 825 bool InspIRCd::AllModulesReportReady(userrec* user)
 826 {
 827         if (!Config->global_implementation[I_OnCheckReady])
 828                 return true;
 829
 830         for (int i = 0; i <= this->GetModuleCount(); i++)
 831         {
 832                 if (Config->implement_lists[i][I_OnCheckReady])
 833                 {
 834                         int res = modules[i]->OnCheckReady(user);
 835                         if (!res)
 836                                 return false;
 837                 }
 838         }
 839         return true;
 840 }
 841
 842 int InspIRCd::GetModuleCount()
 843 {
 844         return this->ModCount;
 845 }
 846
 847 time_t InspIRCd::Time(bool delta)
 848 {
 849         if (delta)
 850                 return TIME + time_delta;
 851         return TIME;
 852 }
 853
 854 int InspIRCd::SetTimeDelta(int delta)
 855 {
 856         int old = time_delta;
 857         time_delta = delta;
 858         this->Log(DEBUG, "Time delta set to %d (was %d)", time_delta, old);
 859         return old;
 860 }
 861
 862 void InspIRCd::AddLocalClone(userrec* user)
 863 {
 864         clonemap::iterator x = local_clones.find(user->GetIPString());
 865         if (x != local_clones.end())
 866                 x->second++;
 867         else
 868                 local_clones[user->GetIPString()] = 1;
 869 }
 870
 871 void InspIRCd::AddGlobalClone(userrec* user)
 872 {
 873         clonemap::iterator y = global_clones.find(user->GetIPString());
 874         if (y != global_clones.end())
 875                 y->second++;
 876         else
 877                 global_clones[user->GetIPString()] = 1;
 878 }
 879
 880 int InspIRCd::GetTimeDelta()
 881 {
 882         return time_delta;
 883 }
 884
 885 bool FileLogger::Readable()
 886 {
 887         return false;
 888 }
 889
 890 void FileLogger::HandleEvent(EventType et, int errornum)
 891 {
 892         this->WriteLogLine("");
 893         if (log)
 894                 ServerInstance->SE->DelFd(this);
 895 }
 896
 897 void FileLogger::WriteLogLine(const std::string &line)
 898 {
 899         if (line.length())
 900                 buffer.append(line);
 901
 902         if (log)
 903         {
 904                 int written = fprintf(log,"%s",buffer.c_str());
 905 #ifdef WINDOWS
 906                 buffer.clear();
 907 #else
 908                 if ((written >= 0) && (written < (int)buffer.length()))
 909                 {
 910                         buffer.erase(0, buffer.length());
 911                         ServerInstance->SE->AddFd(this);
 912                 }
 913                 else if (written == -1)
 914                 {
 915                         if (errno == EAGAIN)
 916                                 ServerInstance->SE->AddFd(this);
 917                 }
 918                 else
 919                 {
 920                         /* Wrote the whole buffer, and no need for write callback */
 921                         buffer.clear();
 922                 }
 923 #endif
 924                 if (writeops++ % 20)
 925                 {
 926                         fflush(log);
 927                 }
 928         }
 929 }
 930
 931 void FileLogger::Close()
 932 {
 933         if (log)
 934         {
 935                 /* Burlex: Windows assumes nonblocking on FILE* pointers anyway, and also "file" fd's aren't the same
 936                  * as socket fd's. */
 937 #ifndef WIN32
 938                 int flags = fcntl(fileno(log), F_GETFL, 0);
 939                 fcntl(fileno(log), F_SETFL, flags ^ O_NONBLOCK);
 940 #endif
 941                 if (buffer.size())
 942                         fprintf(log,"%s",buffer.c_str());
 943
 944 #ifndef WINDOWS
 945                 ServerInstance->SE->DelFd(this);
 946 #endif
 947
 948                 fflush(log);
 949                 fclose(log);
 950         }
 951
 952         buffer.clear();
 953 }
 954
 955 FileLogger::FileLogger(InspIRCd* Instance, FILE* logfile) : ServerInstance(Instance), log(logfile), writeops(0)
 956 {
 957         if (log)
 958         {
 959                 irc::sockets::NonBlocking(fileno(log));
 960                 this->SetFd(fileno(log));
 961                 buffer.clear();
 962         }
 963 }
 964
 965 FileLogger::~FileLogger()
 966 {
 967         this->Close();
 968 }
 969