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1 /*       +------------------------------------+
2  *       | Inspire Internet Relay Chat Daemon |
3  *       +------------------------------------+
4  *
5  *  InspIRCd: (C) 2002-2009 InspIRCd Development Team
6  * See: http://wiki.inspircd.org/Credits
7  *
8  * This program is free but copyrighted software; see
9  *          the file COPYING for details.
10  *
11  * ---------------------------------------------------
12  */
13
14 /* $Core */
15 #include "inspircd.h"
16 #include "inspircd_version.h"
17 #include <signal.h>
18
19 #ifndef WIN32
20         #include <dirent.h>
21         #include <unistd.h>
22         #include <sys/resource.h>
23         #include <dlfcn.h>
24         #include <getopt.h>
25
26         /* Some systems don't define RUSAGE_SELF. This should fix them. */
27         #ifndef RUSAGE_SELF
28                 #define RUSAGE_SELF 0
29         #endif
30
31         #include <pwd.h> // setuid
32         #include <grp.h> // setgid
33 #endif
34
35 #include <fstream>
36 #include "xline.h"
37 #include "bancache.h"
38 #include "socketengine.h"
39 #include "socket.h"
40 #include "command_parse.h"
41 #include "exitcodes.h"
42 #include "caller.h"
43 #include "testsuite.h"
44
45 InspIRCd* ServerInstance = NULL;
46 int* mysig = NULL;
47
48 /** Seperate from the other casemap tables so that code *can* still exclusively rely on RFC casemapping
49  * if it must.
50  *
51  * This is provided as a pointer so that modules can change it to their custom mapping tables,
52  * e.g. for national character support.
53  */
54 unsigned const char *national_case_insensitive_map = rfc_case_insensitive_map;
55
56
57 /* Moved from exitcodes.h -- due to duplicate symbols -- Burlex
58  * XXX this is a bit ugly. -- w00t
59  */
60 const char* ExitCodes[] =
61 {
62                 "No error", /* 0 */
63                 "DIE command", /* 1 */
64                 "execv() failed", /* 2 */
65                 "Internal error", /* 3 */
66                 "Config file error", /* 4 */
67                 "Logfile error", /* 5 */
68                 "POSIX fork failed", /* 6 */
69                 "Bad commandline parameters", /* 7 */
70                 "No ports could be bound", /* 8 */
71                 "Can't write PID file", /* 9 */
72                 "SocketEngine could not initialize", /* 10 */
73                 "Refusing to start up as root", /* 11 */
74                 "Found a <die> tag!", /* 12 */
75                 "Couldn't load module on startup", /* 13 */
76                 "Could not create windows forked process", /* 14 */
77                 "Received SIGTERM", /* 15 */
78                 "Bad command handler loaded", /* 16 */
79                 "RegisterServiceCtrlHandler failed", /* 17 */
80                 "UpdateSCMStatus failed", /* 18 */
81                 "CreateEvent failed" /* 19 */
82 };
83
84 template<typename T> static void DeleteZero(T*&n)
85 {
86         if (n != NULL)
87         {
88                 delete n;
89                 n = NULL;
90         }
91 }
92
93 void InspIRCd::Cleanup()
94 {
95         if (Config)
96         {
97                 for (unsigned int i = 0; i < ports.size(); i++)
98                 {
99                         /* This calls the constructor and closes the listening socket */
100                         delete ports[i];
101                 }
102
103                 ports.clear();
104         }
105
106         /* Close all client sockets, or the new process inherits them */
107         std::vector<User*>::reverse_iterator i = Users->local_users.rbegin();
108         while (i != this->Users->local_users.rend())
109         {
110                 User* u = *i++;
111                 Users->QuitUser(u, "Server shutdown");
112         }
113
114         /* We do this more than once, so that any service providers get a
115          * chance to be unhooked by the modules using them, but then get
116          * a chance to be removed themsleves.
117          *
118          * XXX there may be a better way to do this
119          */
120         for (int tries = 0; tries < 4; tries++)
121         {
122                 std::vector<std::string> module_names = Modules->GetAllModuleNames(0);
123                 for (std::vector<std::string>::iterator k = module_names.begin(); k != module_names.end(); ++k)
124                 {
125                         /* Unload all modules, so they get a chance to clean up their listeners */
126                         this->Modules->Unload(k->c_str());
127                 }
128                 GlobalCulls.Apply();
129         }
130
131         /* Delete objects dynamically allocated in constructor (destructor would be more appropriate, but we're likely exiting) */
132         /* Must be deleted before modes as it decrements modelines */
133         DeleteZero(this->FakeClient);
134         DeleteZero(this->Users);
135         DeleteZero(this->Modes);
136         DeleteZero(this->XLines);
137         DeleteZero(this->Parser);
138         DeleteZero(this->stats);
139         DeleteZero(this->Modules);
140         DeleteZero(this->BanCache);
141         DeleteZero(this->SNO);
142         DeleteZero(this->Config);
143         DeleteZero(this->Res);
144         DeleteZero(this->chanlist);
145         DeleteZero(this->PI);
146         DeleteZero(this->Threads);
147         DeleteZero(this->Timers);
148         DeleteZero(this->SE);
149         /* Close logging */
150         this->Logs->CloseLogs();
151         DeleteZero(this->Logs);
152 }
153
154 void InspIRCd::Restart(const std::string &reason)
155 {
156         /* SendError flushes each client's queue,
157          * regardless of writeability state
158          */
159         this->SendError(reason);
160
161         /* Figure out our filename (if theyve renamed it, we're boned) */
162         std::string me;
163
164 #ifdef WINDOWS
165         char module[MAX_PATH];
166         if (GetModuleFileName(NULL, module, MAX_PATH))
167                 me = module;
168 #else
169         me = Config->MyDir + "/inspircd";
170 #endif
171
172         char** argv = Config->argv;
173
174         this->Cleanup();
175
176         if (execv(me.c_str(), argv) == -1)
177         {
178                 /* Will raise a SIGABRT if not trapped */
179                 throw CoreException(std::string("Failed to execv()! error: ") + strerror(errno));
180         }
181 }
182
183 void InspIRCd::ResetMaxBans()
184 {
185         for (chan_hash::const_iterator i = chanlist->begin(); i != chanlist->end(); i++)
186                 i->second->ResetMaxBans();
187 }
188
189 /** Because hash_map doesnt free its buckets when we delete items (this is a 'feature')
190  * we must occasionally rehash the hash (yes really).
191  * We do this by copying the entries from the old hash to a new hash, causing all
192  * empty buckets to be weeded out of the hash. We dont do this on a timer, as its
193  * very expensive, so instead we do it when the user types /REHASH and expects a
194  * short delay anyway.
195  */
196 void InspIRCd::RehashUsersAndChans()
197 {
198         user_hash* old_users = this->Users->clientlist;
199         user_hash* old_uuid  = this->Users->uuidlist;
200         chan_hash* old_chans = this->chanlist;
201
202         this->Users->clientlist = new user_hash();
203         this->Users->uuidlist = new user_hash();
204         this->chanlist = new chan_hash();
205
206         for (user_hash::const_iterator n = old_users->begin(); n != old_users->end(); n++)
207                 this->Users->clientlist->insert(*n);
208
209         delete old_users;
210
211         for (user_hash::const_iterator n = old_uuid->begin(); n != old_uuid->end(); n++)
212                 this->Users->uuidlist->insert(*n);
213
214         delete old_uuid;
215
216         for (chan_hash::const_iterator n = old_chans->begin(); n != old_chans->end(); n++)
217                 this->chanlist->insert(*n);
218
219         delete old_chans;
220 }
221
222 void InspIRCd::SetSignals()
223 {
224 #ifndef WIN32
225         signal(SIGALRM, SIG_IGN);
226         signal(SIGHUP, InspIRCd::SetSignal);
227         signal(SIGPIPE, SIG_IGN);
228         signal(SIGCHLD, SIG_IGN);
229         /* We want E2BIG not a signal! */
230         signal(SIGXFSZ, SIG_IGN);
231 #endif
232         signal(SIGTERM, InspIRCd::SetSignal);
233 }
234
235 void InspIRCd::QuickExit(int status)
236 {
237         exit(0);
238 }
239
240 bool InspIRCd::DaemonSeed()
241 {
242 #ifdef WINDOWS
243         printf_c("InspIRCd Process ID: \033[1;32m%lu\033[0m\n", GetCurrentProcessId());
244         return true;
245 #else
246         signal(SIGTERM, InspIRCd::QuickExit);
247
248         int childpid;
249         if ((childpid = fork ()) < 0)
250                 return false;
251         else if (childpid > 0)
252         {
253                 /* We wait here for the child process to kill us,
254                  * so that the shell prompt doesnt come back over
255                  * the output.
256                  * Sending a kill with a signal of 0 just checks
257                  * if the child pid is still around. If theyre not,
258                  * they threw an error and we should give up.
259                  */
260                 while (kill(childpid, 0) != -1)
261                         sleep(1);
262                 exit(0);
263         }
264         setsid ();
265         umask (007);
266         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
267
268         signal(SIGTERM, InspIRCd::SetSignal);
269
270         rlimit rl;
271         if (getrlimit(RLIMIT_CORE, &rl) == -1)
272         {
273                 this->Logs->Log("STARTUP",DEFAULT,"Failed to getrlimit()!");
274                 return false;
275         }
276         else
277         {
278                 rl.rlim_cur = rl.rlim_max;
279                 if (setrlimit(RLIMIT_CORE, &rl) == -1)
280                         this->Logs->Log("STARTUP",DEFAULT,"setrlimit() failed, cannot increase coredump size.");
281         }
282
283         return true;
284 #endif
285 }
286
287 void InspIRCd::WritePID(const std::string &filename)
288 {
289         std::string fname = (filename.empty() ? "inspircd.pid" : filename);
290         std::replace(fname.begin(), fname.end(), '\\', '/');
291         if ((fname[0] != '/') && (!Config->StartsWithWindowsDriveLetter(filename)))
292         {
293                 std::string::size_type pos;
294                 std::string confpath = this->ConfigFileName;
295                 if ((pos = confpath.rfind("/")) != std::string::npos)
296                 {
297                         /* Leaves us with just the path */
298                         fname = confpath.substr(0, pos) + std::string("/") + fname;
299                 }
300         }
301         std::ofstream outfile(fname.c_str());
302         if (outfile.is_open())
303         {
304                 outfile << getpid();
305                 outfile.close();
306         }
307         else
308         {
309                 printf("Failed to write PID-file '%s', exiting.\n",fname.c_str());
310                 this->Logs->Log("STARTUP",DEFAULT,"Failed to write PID-file '%s', exiting.",fname.c_str());
311                 Exit(EXIT_STATUS_PID);
312         }
313 }
314
315 InspIRCd::InspIRCd(int argc, char** argv) :
316          ConfigFileName("inspircd.conf"),
317
318          /* Functor pointer initialisation.
319           *
320           * THIS MUST MATCH THE ORDER OF DECLARATION OF THE FUNCTORS, e.g. the methods
321           * themselves within the class.
322           */
323          NICKForced("NICKForced", NULL),
324          OperQuit("OperQuit", NULL),
325          IsChannel(&HandleIsChannel),
326          IsSID(&HandleIsSID),
327          Rehash(&HandleRehash),
328          IsNick(&HandleIsNick),
329          IsIdent(&HandleIsIdent),
330          FloodQuitUser(&HandleFloodQuitUser)
331 {
332 #ifdef WIN32
333         // Strict, frequent checking of memory on debug builds
334         _CrtSetDbgFlag ( _CRTDBG_CHECK_ALWAYS_DF | _CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF );
335
336         // Avoid erroneous frees on early exit
337         WindowsIPC = 0;
338 #endif
339
340         ServerInstance = this;
341
342         Extensible::Register(&NICKForced);
343         Extensible::Register(&OperQuit);
344
345         FailedPortList pl;
346         int do_version = 0, do_nofork = 0, do_debug = 0,
347             do_nolog = 0, do_root = 0, do_testsuite = 0;    /* flag variables */
348         int c = 0;
349
350         // Initialize so that if we exit before proper initialization they're not deleted
351         this->Logs = 0;
352         this->Threads = 0;
353         this->PI = 0;
354         this->Users = 0;
355         this->chanlist = 0;
356         this->Config = 0;
357         this->SNO = 0;
358         this->BanCache = 0;
359         this->Modules = 0;
360         this->stats = 0;
361         this->Timers = 0;
362         this->Parser = 0;
363         this->XLines = 0;
364         this->Modes = 0;
365         this->Res = 0;
366         this->ConfigThread = NULL;
367
368         // Initialise TIME
369         this->TIME = time(NULL);
370
371         // This must be created first, so other parts of Insp can use it while starting up
372         this->Logs = new LogManager;
373
374         SE = CreateSocketEngine();
375
376         this->Threads = new ThreadEngine;
377
378         /* Default implementation does nothing */
379         this->PI = new ProtocolInterface;
380
381         this->s_signal = 0;
382
383         // Create base manager classes early, so nothing breaks
384         this->Users = new UserManager;
385
386         this->Users->unregistered_count = 0;
387
388         this->Users->clientlist = new user_hash();
389         this->Users->uuidlist = new user_hash();
390         this->chanlist = new chan_hash();
391
392         this->Config = new ServerConfig;
393         this->SNO = new SnomaskManager;
394         this->BanCache = new BanCacheManager;
395         this->Modules = new ModuleManager();
396         this->stats = new serverstats();
397         this->Timers = new TimerManager;
398         this->Parser = new CommandParser;
399         this->XLines = new XLineManager;
400
401         this->Config->argv = argv;
402         this->Config->argc = argc;
403
404         if (chdir(Config->GetFullProgDir().c_str()))
405         {
406                 printf("Unable to change to my directory: %s\nAborted.", strerror(errno));
407                 exit(0);
408         }
409
410         this->Config->opertypes.clear();
411         this->Config->operclass.clear();
412
413         this->TIME = this->OLDTIME = this->startup_time = time(NULL);
414         srand(this->TIME);
415
416         *this->LogFileName = 0;
417
418         struct option longopts[] =
419         {
420                 { "nofork",     no_argument,            &do_nofork,     1       },
421                 { "logfile",    required_argument,      NULL,           'f'     },
422                 { "config",     required_argument,      NULL,           'c'     },
423                 { "debug",      no_argument,            &do_debug,      1       },
424                 { "nolog",      no_argument,            &do_nolog,      1       },
425                 { "runasroot",  no_argument,            &do_root,       1       },
426                 { "version",    no_argument,            &do_version,    1       },
427                 { "testsuite",  no_argument,            &do_testsuite,  1       },
428                 { 0, 0, 0, 0 }
429         };
430
431         int index;
432         while ((c = getopt_long_only(argc, argv, ":f:", longopts, &index)) != -1)
433         {
434                 switch (c)
435                 {
436                         case 'f':
437                                 /* Log filename was set */
438                                 strlcpy(LogFileName, optarg, MAXBUF);
439                         break;
440                         case 'c':
441                                 /* Config filename was set */
442                                 ConfigFileName = optarg;
443                         break;
444                         case 0:
445                                 /* getopt_long_only() set an int variable, just keep going */
446                         break;
447                         case '?':
448                                 /* Unknown parameter */
449                         default:
450                                 /* Fall through to handle other weird values too */
451                                 printf("Unknown parameter '%s'\n", argv[optind-1]);
452                                 printf("Usage: %s [--nofork] [--nolog] [--debug] [--logfile <filename>]\n%*s[--runasroot] [--version] [--config <config>] [--testsuite]\n", argv[0], static_cast<int>(8+strlen(argv[0])), " ");
453                                 Exit(EXIT_STATUS_ARGV);
454                         break;
455                 }
456         }
457
458         if (do_testsuite)
459                 do_nofork = do_debug = true;
460
461         if (do_version)
462         {
463                 printf("\n%s r%s\n", VERSION, REVISION);
464                 Exit(EXIT_STATUS_NOERROR);
465         }
466
467 #ifdef WIN32
468
469         // Handle forking
470         if(!do_nofork)
471         {
472                 DWORD ExitCode = WindowsForkStart();
473                 if(ExitCode)
474                         exit(ExitCode);
475         }
476
477         // Set up winsock
478         WSADATA wsadata;
479         WSAStartup(MAKEWORD(2,0), &wsadata);
480         ChangeWindowsSpecificPointers();
481 #endif
482         Config->MyExecutable = argv[0];
483
484         /* Set the finished argument values */
485         Config->nofork = do_nofork;
486         Config->forcedebug = do_debug;
487         Config->writelog = !do_nolog;
488         Config->TestSuite = do_testsuite;
489
490         if (!this->OpenLog(argv, argc))
491         {
492                 printf("ERROR: Could not open logfile %s: %s\n\n", Config->logpath.c_str(), strerror(errno));
493                 Exit(EXIT_STATUS_LOG);
494         }
495
496         if (!ServerConfig::FileExists(ConfigFileName.c_str()))
497         {
498 #ifdef WIN32
499                 /* Windows can (and defaults to) hide file extensions, so let's play a bit nice for windows users. */
500                 std::string txtconf = this->ConfigFileName;
501                 txtconf.append(".txt");
502
503                 if (ServerConfig::FileExists(txtconf.c_str()))
504                 {
505                         ConfigFileName = txtconf;
506                 }
507                 else
508 #endif
509                 {
510                         printf("ERROR: Cannot open config file: %s\nExiting...\n", ConfigFileName.c_str());
511                         this->Logs->Log("STARTUP",DEFAULT,"Unable to open config file %s", ConfigFileName.c_str());
512                         Exit(EXIT_STATUS_CONFIG);
513                 }
514         }
515
516         printf_c("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
517         printf_c("(C) InspIRCd Development Team.\033[0m\n\n");
518         printf_c("Developers:\n");
519         printf_c("\t\033[1;32mBrain, FrostyCoolSlug, w00t, Om, Special\n");
520         printf_c("\t\033[1;32mpeavey, aquanight, psychon, dz, danieldg\033[0m\n\n");
521         printf_c("Others:\t\t\t\033[1;32mSee /INFO Output\033[0m\n");
522
523         this->Modes = new ModeParser;
524
525         if (!do_root)
526                 this->CheckRoot();
527         else
528         {
529                 printf("* WARNING * WARNING * WARNING * WARNING * WARNING * \n\n");
530                 printf("YOU ARE RUNNING INSPIRCD AS ROOT. THIS IS UNSUPPORTED\n");
531                 printf("AND IF YOU ARE HACKED, CRACKED, SPINDLED OR MUTILATED\n");
532                 printf("OR ANYTHING ELSE UNEXPECTED HAPPENS TO YOU OR YOUR\n");
533                 printf("SERVER, THEN IT IS YOUR OWN FAULT. IF YOU DID NOT MEAN\n");
534                 printf("TO START INSPIRCD AS ROOT, HIT CTRL+C NOW AND RESTART\n");
535                 printf("THE PROGRAM AS A NORMAL USER. YOU HAVE BEEN WARNED!\n");
536                 printf("\nInspIRCd starting in 20 seconds, ctrl+c to abort...\n");
537                 sleep(20);
538         }
539
540         this->SetSignals();
541
542         if (!Config->nofork)
543         {
544                 if (!this->DaemonSeed())
545                 {
546                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
547                         Logs->Log("STARTUP", DEFAULT, "ERROR: could not go into daemon mode. Shutting down.");
548                         Exit(EXIT_STATUS_FORK);
549                 }
550         }
551
552         SE->RecoverFromFork();
553
554         /* During startup we don't actually initialize this
555          * in the thread engine.
556          */
557         this->Config->Read();
558         this->Config->Apply(NULL, "");
559         Logs->OpenFileLogs();
560
561         this->Res = new DNS;
562
563         /*
564          * Initialise SID/UID.
565          * For an explanation as to exactly how this works, and why it works this way, see GetUID().
566          *   -- w00t
567          */
568         if (Config->sid.empty())
569         {
570                 // Generate one
571                 int sid = 0;
572                 char sidstr[4];
573
574                 for (const char* x = Config->ServerName.c_str(); *x; ++x)
575                         sid = 5 * sid + *x;
576                 for (const char* y = Config->ServerDesc.c_str(); *y; ++y)
577                         sid = 5 * sid + *y;
578                 sprintf(sidstr, "%03d", sid % 1000);
579
580                 Config->sid = sidstr;
581         }
582
583         /* set up fake client again this time with the correct uid */
584         this->FakeClient = new FakeUser("!");
585         this->FakeClient->SetFakeServer(Config->ServerName);
586
587         // Get XLine to do it's thing.
588         this->XLines->CheckELines();
589         this->XLines->ApplyLines();
590
591         int bounditems = BindPorts(pl);
592
593         printf("\n");
594
595         this->Modules->LoadAll();
596
597         /* Just in case no modules were loaded - fix for bug #101 */
598         this->BuildISupport();
599         Config->ApplyDisabledCommands(Config->DisabledCommands);
600
601         if (!pl.empty())
602         {
603                 printf("\nWARNING: Not all your client ports could be bound --\nstarting anyway with %d of %d client ports bound.\n\n",
604                         bounditems, bounditems + (int)pl.size());
605                 printf("The following port(s) failed to bind:\n");
606                 printf("Hint: Try using a public IP instead of blank or *\n\n");
607                 int j = 1;
608                 for (FailedPortList::iterator i = pl.begin(); i != pl.end(); i++, j++)
609                 {
610                         printf("%d.\tAddress: %s\tReason: %s\n", j, i->first.empty() ? "<all>" : i->first.c_str(), i->second.c_str());
611                 }
612         }
613
614         printf("\nInspIRCd is now running as '%s'[%s] with %d max open sockets\n",
615                 Config->ServerName.c_str(),Config->GetSID().c_str(), SE->GetMaxFds());
616
617 #ifndef WINDOWS
618         if (!Config->nofork)
619         {
620                 if (kill(getppid(), SIGTERM) == -1)
621                 {
622                         printf("Error killing parent process: %s\n",strerror(errno));
623                         Logs->Log("STARTUP", DEFAULT, "Error killing parent process: %s",strerror(errno));
624                 }
625         }
626
627         if (isatty(0) && isatty(1) && isatty(2))
628         {
629                 /* We didn't start from a TTY, we must have started from a background process -
630                  * e.g. we are restarting, or being launched by cron. Dont kill parent, and dont
631                  * close stdin/stdout
632                  */
633                 if ((!do_nofork) && (!do_testsuite))
634                 {
635                         fclose(stdin);
636                         fclose(stderr);
637                         fclose(stdout);
638                 }
639                 else
640                 {
641                         Logs->Log("STARTUP", DEFAULT,"Keeping pseudo-tty open as we are running in the foreground.");
642                 }
643         }
644 #else
645         WindowsIPC = new IPC;
646         if(!Config->nofork)
647         {
648                 WindowsForkKillOwner();
649                 FreeConsole();
650         }
651         /* Set win32 service as running, if we are running as a service */
652         SetServiceRunning();
653 #endif
654
655         Logs->Log("STARTUP", DEFAULT, "Startup complete as '%s'[%s], %d max open sockets", Config->ServerName.c_str(),Config->GetSID().c_str(), SE->GetMaxFds());
656
657 #ifndef WIN32
658         if (!Config->SetGroup.empty())
659         {
660                 int ret;
661
662                 // setgroups
663                 ret = setgroups(0, NULL);
664
665                 if (ret == -1)
666                 {
667                         this->Logs->Log("SETGROUPS", DEFAULT, "setgroups() failed (wtf?): %s", strerror(errno));
668                         this->QuickExit(0);
669                 }
670
671                 // setgid
672                 struct group *g;
673
674                 errno = 0;
675                 g = getgrnam(this->Config->SetGroup.c_str());
676
677                 if (!g)
678                 {
679                         this->Logs->Log("SETGUID", DEFAULT, "getgrnam() failed (bad user?): %s", strerror(errno));
680                         this->QuickExit(0);
681                 }
682
683                 ret = setgid(g->gr_gid);
684
685                 if (ret == -1)
686                 {
687                         this->Logs->Log("SETGUID", DEFAULT, "setgid() failed (bad user?): %s", strerror(errno));
688                         this->QuickExit(0);
689                 }
690         }
691
692         if (!Config->SetUser.empty())
693         {
694                 // setuid
695                 struct passwd *u;
696
697                 errno = 0;
698                 u = getpwnam(this->Config->SetUser.c_str());
699
700                 if (!u)
701                 {
702                         this->Logs->Log("SETGUID", DEFAULT, "getpwnam() failed (bad user?): %s", strerror(errno));
703                         this->QuickExit(0);
704                 }
705
706                 int ret = setuid(u->pw_uid);
707
708                 if (ret == -1)
709                 {
710                         this->Logs->Log("SETGUID", DEFAULT, "setuid() failed (bad user?): %s", strerror(errno));
711                         this->QuickExit(0);
712                 }
713         }
714 #endif
715
716         this->WritePID(Config->PID);
717 }
718
719 int InspIRCd::Run()
720 {
721         /* See if we're supposed to be running the test suite rather than entering the mainloop */
722         if (Config->TestSuite)
723         {
724                 TestSuite* ts = new TestSuite;
725                 delete ts;
726                 Exit(0);
727         }
728
729         while (true)
730         {
731 #ifndef WIN32
732                 static rusage ru;
733 #else
734                 static time_t uptime;
735                 static struct tm * stime;
736                 static char window_title[100];
737 #endif
738
739                 /* Check if there is a config thread which has finished executing but has not yet been freed */
740                 if (this->ConfigThread && this->ConfigThread->IsDone())
741                 {
742                         /* Rehash has completed */
743                         this->Logs->Log("CONFIG",DEBUG,"Detected ConfigThread exiting, tidying up...");
744
745                         this->ConfigThread->Finish();
746
747                         ConfigThread->join();
748                         delete ConfigThread;
749                         ConfigThread = NULL;
750                 }
751
752                 /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
753                  * Once per loop iteration is pleanty.
754                  */
755                 OLDTIME = TIME;
756                 TIME = time(NULL);
757
758                 /* Run background module timers every few seconds
759                  * (the docs say modules shouldnt rely on accurate
760                  * timing using this event, so we dont have to
761                  * time this exactly).
762                  */
763                 if (TIME != OLDTIME)
764                 {
765                         /* Allow a buffer of two seconds drift on this so that ntpdate etc dont harass admins */
766                         if (TIME < OLDTIME - 2)
767                         {
768                                 SNO->WriteToSnoMask('d', "\002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %lu secs.", (unsigned long)OLDTIME-TIME);
769                         }
770                         else if (TIME > OLDTIME + 2)
771                         {
772                                 SNO->WriteToSnoMask('d', "\002EH?!\002 -- Time is jumping FORWARDS! Clock skipped %lu secs.", (unsigned long)TIME - OLDTIME);
773                         }
774
775                         if ((TIME % 3600) == 0)
776                         {
777                                 this->RehashUsersAndChans();
778                                 FOREACH_MOD(I_OnGarbageCollect, OnGarbageCollect());
779                         }
780
781                         Timers->TickTimers(TIME);
782                         this->DoBackgroundUserStuff();
783
784                         if ((TIME % 5) == 0)
785                         {
786                                 FOREACH_MOD(I_OnBackgroundTimer,OnBackgroundTimer(TIME));
787                                 SNO->FlushSnotices();
788                         }
789 #ifndef WIN32
790                         /* Same change as in cmd_stats.cpp, use RUSAGE_SELF rather than '0' -- Om */
791                         if (!getrusage(RUSAGE_SELF, &ru))
792                         {
793                                 gettimeofday(&this->stats->LastSampled, NULL);
794                                 this->stats->LastCPU = ru.ru_utime;
795                         }
796 #else
797                         WindowsIPC->Check();
798 #endif
799                 }
800
801                 /* Call the socket engine to wait on the active
802                  * file descriptors. The socket engine has everything's
803                  * descriptors in its list... dns, modules, users,
804                  * servers... so its nice and easy, just one call.
805                  * This will cause any read or write events to be
806                  * dispatched to their handlers.
807                  */
808                 this->SE->DispatchTrialWrites();
809                 this->SE->DispatchEvents();
810
811                 /* if any users were quit, take them out */
812                 this->GlobalCulls.Apply();
813
814                 if (this->s_signal)
815                 {
816                         this->SignalHandler(s_signal);
817                         this->s_signal = 0;
818                 }
819         }
820
821         return 0;
822 }
823
824 /**********************************************************************************/
825
826 /**
827  * An ircd in five lines! bwahahaha. ahahahahaha. ahahah *cough*.
828  */
829
830 /* this returns true when all modules are satisfied that the user should be allowed onto the irc server
831  * (until this returns true, a user will block in the waiting state, waiting to connect up to the
832  * registration timeout maximum seconds)
833  */
834 bool InspIRCd::AllModulesReportReady(User* user)
835 {
836         ModResult res;
837         FIRST_MOD_RESULT(OnCheckReady, res, (user));
838         return (res == MOD_RES_PASSTHRU);
839 }
840
841 time_t InspIRCd::Time()
842 {
843         return TIME;
844 }
845
846 void InspIRCd::SetSignal(int signal)
847 {
848         *mysig = signal;
849 }
850
851 /* On posix systems, the flow of the program starts right here, with
852  * ENTRYPOINT being a #define that defines main(). On Windows, ENTRYPOINT
853  * defines smain() and the real main() is in the service code under
854  * win32service.cpp. This allows the service control manager to control
855  * the process where we are running as a windows service.
856  */
857 ENTRYPOINT
858 {
859         new InspIRCd(argc, argv);
860         mysig = &ServerInstance->s_signal;
861         ServerInstance->Run();
862         delete ServerInstance;
863         return 0;
864 }