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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 template<typename T> static void DeleteZero(T*&n)
80 {
81         T* t = n;
82         n = NULL;
83         delete t;
84 }
85
86 void InspIRCd::Cleanup()
87 {
88         // Close all listening sockets
89         for (unsigned int i = 0; i < ports.size(); i++)
90         {
91                 ports[i]->cull();
92                 delete ports[i];
93         }
94         ports.clear();
95
96         // Disconnect all local users
97         const std::string quitmsg = "Server shutting down";
98         const UserManager::LocalList& list = Users.GetLocalUsers();
99         while (!list.empty())
100                 ServerInstance->Users.QuitUser(list.front(), quitmsg);
101
102         GlobalCulls.Apply();
103         Modules->UnloadAll();
104
105         /* Delete objects dynamically allocated in constructor (destructor would be more appropriate, but we're likely exiting) */
106         /* Must be deleted before modes as it decrements modelines */
107         if (FakeClient)
108         {
109                 delete FakeClient->server;
110                 FakeClient->cull();
111         }
112         DeleteZero(this->FakeClient);
113         DeleteZero(this->XLines);
114         DeleteZero(this->Config);
115         SocketEngine::Deinit();
116         Logs->CloseLogs();
117 }
118
119 void InspIRCd::SetSignals()
120 {
121 #ifndef _WIN32
122         signal(SIGALRM, SIG_IGN);
123         signal(SIGCHLD, SIG_IGN);
124         signal(SIGHUP, InspIRCd::SetSignal);
125         signal(SIGPIPE, SIG_IGN);
126         signal(SIGUSR1, SIG_IGN);
127         signal(SIGUSR2, SIG_IGN);
128         signal(SIGXFSZ, SIG_IGN);
129 #endif
130         signal(SIGTERM, InspIRCd::SetSignal);
131 }
132
133 // Required for returning the proper value of EXIT_SUCCESS for the parent process
134 static void VoidSignalHandler(int signalreceived)
135 {
136         exit(EXIT_STATUS_NOERROR);
137 }
138
139 bool InspIRCd::DaemonSeed()
140 {
141 #ifdef _WIN32
142         std::cout << "InspIRCd Process ID: " << con_green << GetCurrentProcessId() << con_reset << std::endl;
143         return true;
144 #else
145         // Do not use exit() here: It will exit with status SIGTERM which would break e.g. daemon scripts
146         signal(SIGTERM, VoidSignalHandler);
147
148         int childpid = fork();
149         if (childpid < 0)
150                 return false;
151         else if (childpid > 0)
152         {
153                 /* We wait here for the child process to kill us,
154                  * so that the shell prompt doesnt come back over
155                  * the output.
156                  * Sending a kill with a signal of 0 just checks
157                  * if the child pid is still around. If theyre not,
158                  * they threw an error and we should give up.
159                  */
160                 while (kill(childpid, 0) != -1)
161                         sleep(1);
162                 exit(EXIT_STATUS_NOERROR);
163         }
164         setsid ();
165         std::cout << "InspIRCd Process ID: " << con_green << getpid() << con_reset << std::endl;
166
167         signal(SIGTERM, InspIRCd::SetSignal);
168
169         rlimit rl;
170         if (getrlimit(RLIMIT_CORE, &rl) == -1)
171         {
172                 this->Logs->Log("STARTUP", LOG_DEFAULT, "Failed to getrlimit()!");
173                 return false;
174         }
175         rl.rlim_cur = rl.rlim_max;
176
177         if (setrlimit(RLIMIT_CORE, &rl) == -1)
178                         this->Logs->Log("STARTUP", LOG_DEFAULT, "setrlimit() failed, cannot increase coredump size.");
179
180         return true;
181 #endif
182 }
183
184 void InspIRCd::WritePID(const std::string& filename, bool exitonfail)
185 {
186 #ifndef _WIN32
187         if (!ServerInstance->Config->cmdline.writepid)
188         {
189                 this->Logs->Log("STARTUP", LOG_DEFAULT, "--nopid specified on command line; PID file not written.");
190                 return;
191         }
192
193         std::string fname(filename);
194         if (fname.empty())
195                 fname = ServerInstance->Config->Paths.PrependData("inspircd.pid");
196         std::ofstream outfile(fname.c_str());
197         if (outfile.is_open())
198         {
199                 outfile << getpid();
200                 outfile.close();
201         }
202         else
203         {
204                 if (exitonfail)
205                         std::cout << "Failed to write PID-file '" << fname << "', exiting." << std::endl;
206                 this->Logs->Log("STARTUP", LOG_DEFAULT, "Failed to write PID-file '%s'%s", fname.c_str(), (exitonfail ? ", exiting." : ""));
207                 if (exitonfail)
208                         Exit(EXIT_STATUS_PID);
209         }
210 #endif
211 }
212
213 InspIRCd::InspIRCd(int argc, char** argv) :
214          ConfigFileName(INSPIRCD_CONFIG_PATH "/inspircd.conf"),
215          PI(&DefaultProtocolInterface),
216
217          /* Functor pointer initialisation.
218           *
219           * THIS MUST MATCH THE ORDER OF DECLARATION OF THE FUNCTORS, e.g. the methods
220           * themselves within the class.
221           */
222          GenRandom(&DefaultGenRandom),
223          IsChannel(&DefaultIsChannel),
224          IsNick(&DefaultIsNick),
225          IsIdent(&DefaultIsIdent)
226 {
227         ServerInstance = this;
228
229         FailedPortList pl;
230         // Flag variables passed to getopt_long() later
231         int do_version = 0, do_nofork = 0, do_debug = 0,
232             do_nolog = 0, do_nopid = 0, do_root = 0;
233
234         // Initialize so that if we exit before proper initialization they're not deleted
235         this->Config = 0;
236         this->XLines = 0;
237         this->ConfigThread = NULL;
238         this->FakeClient = NULL;
239
240         UpdateTime();
241         this->startup_time = TIME.tv_sec;
242
243         SocketEngine::Init();
244
245         this->Config = new ServerConfig;
246         dynamic_reference_base::reset_all();
247         this->XLines = new XLineManager;
248
249         this->Config->cmdline.argv = argv;
250         this->Config->cmdline.argc = argc;
251
252 #ifdef _WIN32
253         srand(TIME.tv_nsec ^ TIME.tv_sec);
254
255         // Initialize the console values
256         g_hStdout = GetStdHandle(STD_OUTPUT_HANDLE);
257         CONSOLE_SCREEN_BUFFER_INFO bufinf;
258         if(GetConsoleScreenBufferInfo(g_hStdout, &bufinf))
259         {
260                 g_wOriginalColors = bufinf.wAttributes & 0x00FF;
261                 g_wBackgroundColor = bufinf.wAttributes & 0x00F0;
262         }
263         else
264         {
265                 g_wOriginalColors = FOREGROUND_RED|FOREGROUND_BLUE|FOREGROUND_GREEN;
266                 g_wBackgroundColor = 0;
267         }
268 #else
269         srandom(TIME.tv_nsec ^ TIME.tv_sec);
270 #endif
271
272         {
273                 ServiceProvider* provs[] =
274                 {
275                         &rfcevents.numeric, &rfcevents.join, &rfcevents.part, &rfcevents.kick, &rfcevents.quit, &rfcevents.nick,
276                         &rfcevents.mode, &rfcevents.topic, &rfcevents.privmsg, &rfcevents.invite, &rfcevents.ping, &rfcevents.pong,
277                         &rfcevents.error
278                 };
279                 Modules.AddServices(provs, sizeof(provs)/sizeof(provs[0]));
280         }
281
282         struct option longopts[] =
283         {
284                 { "nofork",     no_argument,            &do_nofork,     1       },
285                 { "config",     required_argument,      NULL,           'c'     },
286                 { "debug",      no_argument,            &do_debug,      1       },
287                 { "nolog",      no_argument,            &do_nolog,      1       },
288                 { "nopid",      no_argument,            &do_nopid,      1       },
289                 { "runasroot",  no_argument,            &do_root,       1       },
290                 { "version",    no_argument,            &do_version,    1       },
291                 { 0, 0, 0, 0 }
292         };
293
294         int c;
295         int index;
296         while ((c = getopt_long(argc, argv, ":c:", longopts, &index)) != -1)
297         {
298                 switch (c)
299                 {
300                         case 'c':
301                                 /* Config filename was set */
302                                 ConfigFileName = optarg;
303 #ifdef _WIN32
304                                 TCHAR configPath[MAX_PATH + 1];
305                                 if (GetFullPathName(optarg, MAX_PATH, configPath, NULL) > 0)
306                                         ConfigFileName = configPath;
307 #else
308                                 char configPath[PATH_MAX + 1];
309                                 if (realpath(optarg, configPath))
310                                         ConfigFileName = configPath;
311 #endif
312                         break;
313                         case 0:
314                                 /* getopt_long_only() set an int variable, just keep going */
315                         break;
316                         case '?':
317                                 /* Unknown parameter */
318                         default:
319                                 /* Fall through to handle other weird values too */
320                                 std::cout << "Unknown parameter '" << argv[optind-1] << "'" << std::endl;
321                                 std::cout << "Usage: " << argv[0] << " [--nofork] [--nolog] [--nopid] [--debug] [--config <config>]" << std::endl <<
322                                         std::string(static_cast<size_t>(8+strlen(argv[0])), ' ') << "[--runasroot] [--version]" << std::endl;
323                                 Exit(EXIT_STATUS_ARGV);
324                         break;
325                 }
326         }
327
328         if (do_version)
329         {
330                 std::cout << std::endl << INSPIRCD_VERSION << std::endl;
331                 Exit(EXIT_STATUS_NOERROR);
332         }
333
334 #ifdef _WIN32
335         // Set up winsock
336         WSADATA wsadata;
337         WSAStartup(MAKEWORD(2,2), &wsadata);
338 #endif
339
340         /* Set the finished argument values */
341         Config->cmdline.nofork = (do_nofork != 0);
342         Config->cmdline.forcedebug = (do_debug != 0);
343         Config->cmdline.writelog = !do_nolog;
344         Config->cmdline.writepid = !do_nopid;
345
346         if (do_debug)
347         {
348                 FileWriter* fw = new FileWriter(stdout, 1);
349                 FileLogStream* fls = new FileLogStream(LOG_RAWIO, fw);
350                 Logs->AddLogTypes("*", fls, true);
351         }
352
353         if (!FileSystem::FileExists(ConfigFileName))
354         {
355 #ifdef _WIN32
356                 /* Windows can (and defaults to) hide file extensions, so let's play a bit nice for windows users. */
357                 std::string txtconf = this->ConfigFileName;
358                 txtconf.append(".txt");
359
360                 if (FileSystem::FileExists(txtconf))
361                 {
362                         ConfigFileName = txtconf;
363                 }
364                 else
365 #endif
366                 {
367                         std::cout << "ERROR: Cannot open config file: " << ConfigFileName << std::endl << "Exiting..." << std::endl;
368                         this->Logs->Log("STARTUP", LOG_DEFAULT, "Unable to open config file %s", ConfigFileName.c_str());
369                         Exit(EXIT_STATUS_CONFIG);
370                 }
371         }
372
373         std::cout << con_green << "InspIRCd - Internet Relay Chat Daemon" << con_reset << std::endl;
374         std::cout << "For contributors & authors: " << con_green << "See /INFO Output" << con_reset << std::endl;
375
376 #ifndef _WIN32
377         if (!do_root)
378                 this->CheckRoot();
379         else
380         {
381                 std::cout << "* WARNING * WARNING * WARNING * WARNING * WARNING *" << std::endl
382                 << "YOU ARE RUNNING INSPIRCD AS ROOT. THIS IS UNSUPPORTED" << std::endl
383                 << "AND IF YOU ARE HACKED, CRACKED, SPINDLED OR MUTILATED" << std::endl
384                 << "OR ANYTHING ELSE UNEXPECTED HAPPENS TO YOU OR YOUR" << std::endl
385                 << "SERVER, THEN IT IS YOUR OWN FAULT. IF YOU DID NOT MEAN" << std::endl
386                 << "TO START INSPIRCD AS ROOT, HIT CTRL+C NOW AND RESTART" << std::endl
387                 << "THE PROGRAM AS A NORMAL USER. YOU HAVE BEEN WARNED!" << std::endl << std::endl
388                 << "InspIRCd starting in 20 seconds, ctrl+c to abort..." << std::endl;
389                 sleep(20);
390         }
391 #endif
392
393         this->SetSignals();
394
395         if (!Config->cmdline.nofork)
396         {
397                 if (!this->DaemonSeed())
398                 {
399                         std::cout << "ERROR: could not go into daemon mode. Shutting down." << std::endl;
400                         Logs->Log("STARTUP", LOG_DEFAULT, "ERROR: could not go into daemon mode. Shutting down.");
401                         Exit(EXIT_STATUS_FORK);
402                 }
403         }
404
405         SocketEngine::RecoverFromFork();
406
407         /* During startup we read the configuration now, not in
408          * a seperate thread
409          */
410         this->Config->Read();
411         this->Config->Apply(NULL, "");
412         Logs->OpenFileLogs();
413
414         // If we don't have a SID, generate one based on the server name and the server description
415         if (Config->sid.empty())
416                 Config->sid = UIDGenerator::GenerateSID(Config->ServerName, Config->ServerDesc);
417
418         // Initialize the UID generator with our sid
419         this->UIDGen.init(Config->sid);
420
421         // Create the server user for this server
422         this->FakeClient = new FakeUser(Config->sid, Config->ServerName, Config->ServerDesc);
423
424         // This is needed as all new XLines are marked pending until ApplyLines() is called
425         this->XLines->ApplyLines();
426
427         int bounditems = BindPorts(pl);
428
429         std::cout << std::endl;
430
431         this->Modules->LoadAll();
432
433         // Build ISupport as ModuleManager::LoadAll() does not do it
434         this->ISupport.Build();
435
436         if (!pl.empty())
437         {
438                 std::cout << std::endl << "WARNING: Not all your client ports could be bound -- " << std::endl << "starting anyway with " << bounditems
439                         << " of " << bounditems + (int)pl.size() << " client ports bound." << std::endl << std::endl;
440                 std::cout << "The following port(s) failed to bind:" << std::endl << std::endl;
441                 int j = 1;
442                 for (FailedPortList::iterator i = pl.begin(); i != pl.end(); i++, j++)
443                 {
444                         std::cout << j << ".\tAddress: " << i->first.str() << " \tReason: " << strerror(i->second) << std::endl;
445                 }
446
447                 std::cout << std::endl << "Hint: Try using a public IP instead of blank or *" << std::endl;
448         }
449
450         std::cout << "InspIRCd is now running as '" << Config->ServerName << "'[" << Config->GetSID() << "] with " << SocketEngine::GetMaxFds() << " max open sockets" << std::endl;
451
452 #ifndef _WIN32
453         if (!Config->cmdline.nofork)
454         {
455                 if (kill(getppid(), SIGTERM) == -1)
456                 {
457                         std::cout << "Error killing parent process: " << strerror(errno) << std::endl;
458                         Logs->Log("STARTUP", LOG_DEFAULT, "Error killing parent process: %s",strerror(errno));
459                 }
460         }
461
462         /* Explicitly shut down stdio's stdin/stdout/stderr.
463          *
464          * The previous logic here was to only do this if stdio was connected to a controlling
465          * terminal.  However, we must do this always to avoid information leaks and other
466          * problems related to stdio.
467          *
468          * The only exception is if we are in debug mode.
469          *
470          *    -- nenolod
471          */
472         if ((!do_nofork) && (!Config->cmdline.forcedebug))
473         {
474                 int fd = open("/dev/null", O_RDWR);
475
476                 fclose(stdin);
477                 fclose(stderr);
478                 fclose(stdout);
479
480                 if (dup2(fd, STDIN_FILENO) < 0)
481                         Logs->Log("STARTUP", LOG_DEFAULT, "Failed to dup /dev/null to stdin.");
482                 if (dup2(fd, STDOUT_FILENO) < 0)
483                         Logs->Log("STARTUP", LOG_DEFAULT, "Failed to dup /dev/null to stdout.");
484                 if (dup2(fd, STDERR_FILENO) < 0)
485                         Logs->Log("STARTUP", LOG_DEFAULT, "Failed to dup /dev/null to stderr.");
486                 close(fd);
487         }
488         else
489         {
490                 Logs->Log("STARTUP", LOG_DEFAULT, "Keeping pseudo-tty open as we are running in the foreground.");
491         }
492 #else
493         /* Set win32 service as running, if we are running as a service */
494         SetServiceRunning();
495
496         // Handle forking
497         if(!do_nofork)
498         {
499                 FreeConsole();
500         }
501
502         QueryPerformanceFrequency(&stats.QPFrequency);
503 #endif
504
505         Logs->Log("STARTUP", LOG_DEFAULT, "Startup complete as '%s'[%s], %lu max open sockets", Config->ServerName.c_str(),Config->GetSID().c_str(), SocketEngine::GetMaxFds());
506
507 #ifndef _WIN32
508         ConfigTag* security = Config->ConfValue("security");
509
510         const std::string SetGroup = security->getString("runasgroup");
511         if (!SetGroup.empty())
512         {
513                 errno = 0;
514                 if (setgroups(0, NULL) == -1)
515                 {
516                         this->Logs->Log("STARTUP", LOG_DEFAULT, "setgroups() failed (wtf?): %s", strerror(errno));
517                         exit(EXIT_STATUS_CONFIG);
518                 }
519
520                 struct group* g = getgrnam(SetGroup.c_str());
521                 if (!g)
522                 {
523                         this->Logs->Log("STARTUP", LOG_DEFAULT, "getgrnam(%s) failed (wrong group?): %s", SetGroup.c_str(), strerror(errno));
524                         exit(EXIT_STATUS_CONFIG);
525                 }
526
527                 if (setgid(g->gr_gid) == -1)
528                 {
529                         this->Logs->Log("STARTUP", LOG_DEFAULT, "setgid(%d) failed (wrong group?): %s", g->gr_gid, strerror(errno));
530                         exit(EXIT_STATUS_CONFIG);
531                 }
532         }
533
534         const std::string SetUser = security->getString("runasuser");
535         if (!SetUser.empty())
536         {
537                 errno = 0;
538                 struct passwd* u = getpwnam(SetUser.c_str());
539                 if (!u)
540                 {
541                         this->Logs->Log("STARTUP", LOG_DEFAULT, "getpwnam(%s) failed (wrong user?): %s", SetUser.c_str(), strerror(errno));
542                         exit(EXIT_STATUS_CONFIG);
543                 }
544
545                 if (setuid(u->pw_uid) == -1)
546                 {
547                         this->Logs->Log("STARTUP", LOG_DEFAULT, "setuid(%d) failed (wrong user?): %s", u->pw_uid, strerror(errno));
548                         exit(EXIT_STATUS_CONFIG);
549                 }
550         }
551
552         this->WritePID(Config->PID);
553 #endif
554 }
555
556 void InspIRCd::UpdateTime()
557 {
558 #ifdef _WIN32
559         SYSTEMTIME st;
560         GetSystemTime(&st);
561
562         TIME.tv_sec = time(NULL);
563         TIME.tv_nsec = st.wMilliseconds;
564 #else
565         #ifdef HAS_CLOCK_GETTIME
566                 clock_gettime(CLOCK_REALTIME, &TIME);
567         #else
568                 struct timeval tv;
569                 gettimeofday(&tv, NULL);
570                 TIME.tv_sec = tv.tv_sec;
571                 TIME.tv_nsec = tv.tv_usec * 1000;
572         #endif
573 #endif
574 }
575
576 void InspIRCd::Run()
577 {
578         UpdateTime();
579         time_t OLDTIME = TIME.tv_sec;
580
581         while (true)
582         {
583 #ifndef _WIN32
584                 static rusage ru;
585 #endif
586
587                 /* Check if there is a config thread which has finished executing but has not yet been freed */
588                 if (this->ConfigThread && this->ConfigThread->IsDone())
589                 {
590                         /* Rehash has completed */
591                         this->Logs->Log("CONFIG", LOG_DEBUG, "Detected ConfigThread exiting, tidying up...");
592
593                         this->ConfigThread->Finish();
594
595                         ConfigThread->join();
596                         delete ConfigThread;
597                         ConfigThread = NULL;
598                 }
599
600                 UpdateTime();
601
602                 /* Run background module timers every few seconds
603                  * (the docs say modules shouldnt rely on accurate
604                  * timing using this event, so we dont have to
605                  * time this exactly).
606                  */
607                 if (TIME.tv_sec != OLDTIME)
608                 {
609 #ifndef _WIN32
610                         getrusage(RUSAGE_SELF, &ru);
611                         stats.LastSampled = TIME;
612                         stats.LastCPU = ru.ru_utime;
613 #else
614                         if(QueryPerformanceCounter(&stats.LastSampled))
615                         {
616                                 FILETIME CreationTime;
617                                 FILETIME ExitTime;
618                                 FILETIME KernelTime;
619                                 FILETIME UserTime;
620                                 GetProcessTimes(GetCurrentProcess(), &CreationTime, &ExitTime, &KernelTime, &UserTime);
621                                 stats.LastCPU.dwHighDateTime = KernelTime.dwHighDateTime + UserTime.dwHighDateTime;
622                                 stats.LastCPU.dwLowDateTime = KernelTime.dwLowDateTime + UserTime.dwLowDateTime;
623                         }
624 #endif
625
626                         if (Config->TimeSkipWarn)
627                         {
628                                 time_t timediff = TIME.tv_sec - OLDTIME;
629
630                                 if (timediff > Config->TimeSkipWarn)
631                                         SNO->WriteToSnoMask('a', "\002Performance warning!\002 Server clock jumped forwards by %lu seconds!", timediff);
632
633                                 else if (timediff < -Config->TimeSkipWarn)
634                                         SNO->WriteToSnoMask('a', "\002Performance warning!\002 Server clock jumped backwards by %lu seconds!", labs(timediff));
635                         }
636
637                         OLDTIME = TIME.tv_sec;
638
639                         if ((TIME.tv_sec % 3600) == 0)
640                         {
641                                 FOREACH_MOD(OnGarbageCollect, ());
642
643                                 // HACK: ELines are not expired properly at the moment but it can't be fixed as
644                                 // the 2.0 XLine system is a spaghetti nightmare. Instead we skip over expired
645                                 // ELines in XLineManager::CheckELines() and expire them here instead.
646                                 XLines->GetAll("E");
647                         }
648
649                         Timers.TickTimers(TIME.tv_sec);
650                         Users->DoBackgroundUserStuff();
651
652                         if ((TIME.tv_sec % 5) == 0)
653                         {
654                                 FOREACH_MOD(OnBackgroundTimer, (TIME.tv_sec));
655                                 SNO->FlushSnotices();
656                         }
657                 }
658
659                 /* Call the socket engine to wait on the active
660                  * file descriptors. The socket engine has everything's
661                  * descriptors in its list... dns, modules, users,
662                  * servers... so its nice and easy, just one call.
663                  * This will cause any read or write events to be
664                  * dispatched to their handlers.
665                  */
666                 SocketEngine::DispatchTrialWrites();
667                 SocketEngine::DispatchEvents();
668
669                 /* if any users were quit, take them out */
670                 GlobalCulls.Apply();
671                 AtomicActions.Run();
672
673                 if (s_signal)
674                 {
675                         this->SignalHandler(s_signal);
676                         s_signal = 0;
677                 }
678         }
679 }
680
681 sig_atomic_t InspIRCd::s_signal = 0;
682
683 void InspIRCd::SetSignal(int signal)
684 {
685         s_signal = signal;
686 }
687
688 /* On posix systems, the flow of the program starts right here, with
689  * ENTRYPOINT being a #define that defines main(). On Windows, ENTRYPOINT
690  * defines smain() and the real main() is in the service code under
691  * win32service.cpp. This allows the service control manager to control
692  * the process where we are running as a windows service.
693  */
694 ENTRYPOINT
695 {
696         new InspIRCd(argc, argv);
697         ServerInstance->Run();
698         delete ServerInstance;
699         return 0;
700 }