ircd/ircd.c

   1 /*
   2  * IRC - Internet Relay Chat, ircd/ircd.c
   3  * Copyright (C) 1990 Jarkko Oikarinen and
   4  *                    University of Oulu, Computing Center
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 1, or (at your option)
   9  * any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  */
  20 /** @file
  21  * @brief Entry point and other initialization functions for the daemon.
  22  * @version $Id: ircd.c,v 1.91 2005/09/12 22:52:01 decampos Exp $
  23  */
  24 #include "config.h"
  25
  26 #include "ircd.h"
  27 #include "IPcheck.h"
  28 #include "class.h"
  29 #include "client.h"
  30 #include "crule.h"
  31 #include "destruct_event.h"
  32 #include "hash.h"
  33 #include "ircd_alloc.h"
  34 #include "ircd_events.h"
  35 #include "ircd_features.h"
  36 #include "ircd_log.h"
  37 #include "ircd_reply.h"
  38 #include "ircd_signal.h"
  39 #include "ircd_string.h"
  40 #include "ircd_crypt.h"
  41 #include "jupe.h"
  42 #include "list.h"
  43 #include "match.h"
  44 #include "motd.h"
  45 #include "msg.h"
  46 #include "numeric.h"
  47 #include "numnicks.h"
  48 #include "opercmds.h"
  49 #include "parse.h"
  50 #include "res.h"
  51 #include "s_auth.h"
  52 #include "s_bsd.h"
  53 #include "s_conf.h"
  54 #include "s_debug.h"
  55 #include "s_misc.h"
  56 #include "s_stats.h"
  57 #include "send.h"
  58 #include "sys.h"
  59 #include "uping.h"
  60 #include "userload.h"
  61 #include "version.h"
  62 #include "whowas.h"
  63
  64 /* #include <assert.h> -- Now using assert in ircd_log.h */
  65 #include <errno.h>
  66 #include <fcntl.h>
  67 #include <netdb.h>
  68 #include <pwd.h>
  69 #include <stdio.h>
  70 #include <stdlib.h>
  71 #include <string.h>
  72 #include <sys/time.h>
  73 #ifdef HAVE_SYS_RESOURCE_H
  74 #include <sys/resource.h>
  75 #endif
  76 #include <sys/socket.h>
  77 #include <sys/stat.h>
  78 #include <sys/types.h>
  79 #include <unistd.h>
  80
  81
  82
  83 /*----------------------------------------------------------------------------
  84  * External stuff
  85  *--------------------------------------------------------------------------*/
  86 extern void init_counters(void);
  87 extern void mem_dbg_initialise(void);
  88
  89 /*----------------------------------------------------------------------------
  90  * Constants / Enums
  91  *--------------------------------------------------------------------------*/
  92 enum {
  93   BOOT_DEBUG = 1,  /**< Enable debug output. */
  94   BOOT_TTY   = 2,  /**< Stay connected to TTY. */
  95   BOOT_CHKCONF = 4 /**< Exit after reading configuration file. */
  96 };
  97
  98
  99 /*----------------------------------------------------------------------------
 100  * Global data (YUCK!)
 101  *--------------------------------------------------------------------------*/
 102 struct Client  me;                      /**< That's me */
 103 struct Connection me_con;               /**< That's me too */
 104 struct Client *GlobalClientList  = &me; /**< Pointer to beginning of
 105                                            Client list */
 106 time_t         TSoffset          = 0;   /**< Offset of timestamps to system clock */
 107 int            GlobalRehashFlag  = 0;   /**< do a rehash if set */
 108 int            GlobalRestartFlag = 0;   /**< do a restart if set */
 109 time_t         CurrentTime;             /**< Updated every time we leave select() */
 110
 111 char          *configfile        = CPATH; /**< Server configuration file */
 112 int            debuglevel        = -1;    /**< Server debug level  */
 113 char          *debugmode         = "";    /**< Server debug level */
 114 static char   *dpath             = DPATH; /**< Working directory for daemon */
 115 static char   *dbg_client;                /**< Client specifier for chkconf */
 116
 117 static struct Timer connect_timer; /**< timer structure for try_connections() */
 118 static struct Timer ping_timer; /**< timer structure for check_pings() */
 119 static struct Timer destruct_event_timer; /**< timer structure for exec_expired_destruct_events() */
 120
 121 /** Daemon information. */
 122 static struct Daemon thisServer  = { 0, 0, 0, 0, 0, 0, -1 };
 123
 124 /** Non-zero until we want to exit. */
 125 int running = 1;
 126
 127
 128 /*----------------------------------------------------------------------------
 129  * API: server_die
 130  *--------------------------------------------------------------------------*/
 131 /** Terminate the server with a message.
 132  * @param[in] message Message to log and send to operators.
 133  */
 134 void server_die(const char *message)
 135 {
 136   /* log_write will send out message to both log file and as server notice */
 137   log_write(LS_SYSTEM, L_CRIT, 0, "Server terminating: %s", message);
 138   flush_connections(0);
 139   close_connections(1);
 140   running = 0;
 141 }
 142
 143 /*----------------------------------------------------------------------------
 144  * API: server_panic
 145  *--------------------------------------------------------------------------*/
 146 /** Immediately terminate the server with a message.
 147  * @param[in] message Message to log, but not send to operators.
 148  */
 149 void server_panic(const char *message)
 150 {
 151   /* inhibit sending server notice--we may be panicking due to low memory */
 152   log_write(LS_SYSTEM, L_CRIT, LOG_NOSNOTICE, "Server panic: %s", message);
 153   flush_connections(0);
 154   log_close();
 155   close_connections(1);
 156   exit(1);
 157 }
 158
 159 /*----------------------------------------------------------------------------
 160  * API: server_restart
 161  *--------------------------------------------------------------------------*/
 162 /** Restart the server with a message.
 163  * @param[in] message Message to log and send to operators.
 164  */
 165 void server_restart(const char *message)
 166 {
 167   static int restarting = 0;
 168
 169   /* inhibit sending any server notices; we may be in a loop */
 170   log_write(LS_SYSTEM, L_WARNING, LOG_NOSNOTICE, "Restarting Server: %s",
 171             message);
 172   if (restarting++) /* increment restarting to prevent looping */
 173     return;
 174
 175   sendto_opmask_butone(0, SNO_OLDSNO, "Restarting server: %s", message);
 176   Debug((DEBUG_NOTICE, "Restarting server..."));
 177   flush_connections(0);
 178
 179   log_close();
 180
 181   close_connections(!(thisServer.bootopt & (BOOT_TTY | BOOT_DEBUG | BOOT_CHKCONF)));
 182
 183   execv(SPATH, thisServer.argv);
 184
 185   /* Have to reopen since it has been closed above */
 186   log_reopen();
 187
 188   log_write(LS_SYSTEM, L_CRIT, 0, "execv(%s,%s) failed: %m", SPATH,
 189             *thisServer.argv);
 190
 191   Debug((DEBUG_FATAL, "Couldn't restart server \"%s\": %s",
 192          SPATH, (strerror(errno)) ? strerror(errno) : ""));
 193   exit(8);
 194 }
 195
 196
 197 /*----------------------------------------------------------------------------
 198  * outofmemory:  Handler for out of memory conditions...
 199  *--------------------------------------------------------------------------*/
 200 /** Handle out-of-memory condition. */
 201 static void outofmemory(void) {
 202   Debug((DEBUG_FATAL, "Out of memory: restarting server..."));
 203   server_restart("Out of Memory");
 204 }
 205
 206
 207 /*----------------------------------------------------------------------------
 208  * write_pidfile
 209  *--------------------------------------------------------------------------*/
 210 /** Write process ID to PID file. */
 211 static void write_pidfile(void) {
 212   char buff[20];
 213
 214   if (thisServer.pid_fd >= 0) {
 215     memset(buff, 0, sizeof(buff));
 216     sprintf(buff, "%5d\n", (int)getpid());
 217     if (write(thisServer.pid_fd, buff, strlen(buff)) == -1)
 218       Debug((DEBUG_NOTICE, "Error writing to pid file %s: %m",
 219              feature_str(FEAT_PPATH)));
 220     return;
 221   }
 222   Debug((DEBUG_NOTICE, "Error opening pid file %s: %m",
 223          feature_str(FEAT_PPATH)));
 224 }
 225
 226 /** Try to create the PID file.
 227  * @return Zero on success; non-zero on any error.
 228  */
 229 static int check_pid(void)
 230 {
 231   struct flock lock;
 232
 233   lock.l_type = F_WRLCK;
 234   lock.l_start = 0;
 235   lock.l_whence = SEEK_SET;
 236   lock.l_len = 0;
 237
 238   if ((thisServer.pid_fd = open(feature_str(FEAT_PPATH), O_CREAT | O_RDWR,
 239                                 0600)) >= 0)
 240     return fcntl(thisServer.pid_fd, F_SETLK, &lock) == -1;
 241
 242   return 1;
 243 }
 244
 245
 246 /** Look for any connections that we should try to initiate.
 247  * Reschedules itself to run again at the appropriate time.
 248  * @param[in] ev Timer event (ignored).
 249  */
 250 static void try_connections(struct Event* ev) {
 251   struct ConfItem*  aconf;
 252   struct ConfItem** pconf;
 253   time_t            next        = 0;
 254   struct ConnectionClass* cltmp;
 255   struct Jupe*      ajupe;
 256   int hold;
 257
 258   assert(ET_EXPIRE == ev_type(ev));
 259   assert(0 != ev_timer(ev));
 260
 261   Debug((DEBUG_NOTICE, "Connection check at   : %s", myctime(CurrentTime)));
 262   for (aconf = GlobalConfList; aconf; aconf = aconf->next) {
 263     /* Only consider server items with non-zero port and non-zero
 264      * connect times that are not actively juped.
 265      */
 266     if (!(aconf->status & CONF_SERVER)
 267         || aconf->address.port == 0
 268         || !(aconf->flags & CONF_AUTOCONNECT)
 269         || ((ajupe = jupe_find(aconf->name)) && JupeIsActive(ajupe)))
 270       continue;
 271
 272     /* Do we need to postpone this connection further? */
 273     hold = aconf->hold > CurrentTime;
 274
 275     /* Update next possible connection check time. */
 276     if (hold && (next > aconf->hold || next == 0))
 277         next = aconf->hold;
 278
 279     cltmp = aconf->conn_class;
 280
 281     /* Do not try to connect if its use is still on hold until future,
 282      * too many links in its connection class, it is already linked,
 283      * or if connect rules forbid a link now.
 284      */
 285     if (hold
 286         || (Links(cltmp) > MaxLinks(cltmp))
 287         || FindServer(aconf->name)
 288         || conf_eval_crule(aconf->name, CRULE_MASK))
 289       continue;
 290
 291     /* Ensure it is at the end of the list for future checks. */
 292     if (aconf->next) {
 293       /* Find aconf's location in the list and splice it out. */
 294       for (pconf = &GlobalConfList; *pconf; pconf = &(*pconf)->next)
 295         if (*pconf == aconf)
 296           *pconf = aconf->next;
 297       /* Reinsert it at the end of the list (where pconf is now). */
 298       *pconf = aconf;
 299       aconf->next = 0;
 300     }
 301
 302     /* Activate the connection itself. */
 303     if (connect_server(aconf, 0))
 304       sendto_opmask_butone(0, SNO_OLDSNO, "Connection to %s activated.",
 305                            aconf->name);
 306
 307     /* And stop looking for further candidates. */
 308     break;
 309   }
 310
 311   if (next == 0)
 312     next = CurrentTime + feature_int(FEAT_CONNECTFREQUENCY);
 313
 314   Debug((DEBUG_NOTICE, "Next connection check : %s", myctime(next)));
 315
 316   timer_add(&connect_timer, try_connections, 0, TT_ABSOLUTE, next);
 317 }
 318
 319
 320 /** Check for clients that have not sent a ping response recently.
 321  * Reschedules itself to run again at the appropriate time.
 322  * @param[in] ev Timer event (ignored).
 323  */
 324 static void check_pings(struct Event* ev) {
 325   int expire     = 0;
 326   int next_check = CurrentTime;
 327   int max_ping   = 0;
 328   int i;
 329
 330   assert(ET_EXPIRE == ev_type(ev));
 331   assert(0 != ev_timer(ev));
 332
 333   next_check += feature_int(FEAT_PINGFREQUENCY);
 334
 335   /* Scan through the client table */
 336   for (i=0; i <= HighestFd; i++) {
 337     struct Client *cptr = LocalClientArray[i];
 338
 339     if (!cptr)
 340       continue;
 341
 342     assert(&me != cptr);  /* I should never be in the local client array! */
 343
 344
 345     /* Remove dead clients. */
 346     if (IsDead(cptr)) {
 347       exit_client(cptr, cptr, &me, cli_info(cptr));
 348       continue;
 349     }
 350
 351     max_ping = IsRegistered(cptr) ? client_get_ping(cptr) :
 352       feature_int(FEAT_CONNECTTIMEOUT);
 353
 354     Debug((DEBUG_DEBUG, "check_pings(%s)=status:%s limit: %d current: %d",
 355            cli_name(cptr),
 356            IsPingSent(cptr) ? "[Ping Sent]" : "[]",
 357            max_ping, (int)(CurrentTime - cli_lasttime(cptr))));
 358
 359     /* Ok, the thing that will happen most frequently, is that someone will
 360      * have sent something recently.  Cover this first for speed.
 361      * --
 362      * If it's an unregistered client and hasn't managed to register within
 363      * max_ping then it's obviously having problems (broken client) or it's
 364      * just up to no good, so we won't skip it, even if its been sending
 365      * data to us.
 366      * -- hikari
 367      */
 368     if ((CurrentTime-cli_lasttime(cptr) < max_ping) && IsRegistered(cptr)) {
 369       expire = cli_lasttime(cptr) + max_ping;
 370       if (expire < next_check)
 371         next_check = expire;
 372       continue;
 373     }
 374
 375     /* Unregistered clients pingout after max_ping seconds, they don't
 376      * get given a second chance - if they were then people could not quite
 377      * finish registration and hold resources without being subject to k/g
 378      * lines
 379      */
 380     if (!IsRegistered(cptr)) {
 381       assert(!IsServer(cptr));
 382       if ((CurrentTime-cli_firsttime(cptr) >= max_ping)) {
 383        /* Display message if they have sent a NICK and a USER but no
 384         * nospoof PONG.
 385         */
 386        if (*(cli_name(cptr)) && cli_user(cptr) && *(cli_user(cptr))->username) {
 387          send_reply(cptr, SND_EXPLICIT | ERR_BADPING,
 388            ":Your client may not be compatible with this server.");
 389          send_reply(cptr, SND_EXPLICIT | ERR_BADPING,
 390            ":Compatible clients are available at %s",
 391          feature_str(FEAT_URL_CLIENTS));
 392        }
 393        exit_client_msg(cptr,cptr,&me, "Registration Timeout");
 394        continue;
 395       } else {
 396         /* OK, they still have enough time left, so we'll just skip to the
 397          * next client.  Set the next check to be when their time is up, if
 398          * that's before the currently scheduled next check -- hikari */
 399         expire = cli_firsttime(cptr) + max_ping;
 400         if (expire < next_check)
 401           next_check = expire;
 402         continue;
 403       }
 404     }
 405
 406     /* Quit the client after max_ping*2 - they should have answered by now */
 407     if (CurrentTime-cli_lasttime(cptr) >= (max_ping*2) )
 408     {
 409       /* If it was a server, then tell ops about it. */
 410       if (IsServer(cptr) || IsConnecting(cptr) || IsHandshake(cptr))
 411         sendto_opmask_butone(0, SNO_OLDSNO,
 412                              "No response from %s, closing link",
 413                              cli_name(cptr));
 414       exit_client_msg(cptr, cptr, &me, "Ping timeout");
 415       continue;
 416     }
 417
 418     if (!IsPingSent(cptr))
 419     {
 420       /* If we haven't PINGed the connection and we haven't heard from it in a
 421        * while, PING it to make sure it is still alive.
 422        */
 423       SetPingSent(cptr);
 424
 425       /* If we're late in noticing don't hold it against them :) */
 426       cli_lasttime(cptr) = CurrentTime - max_ping;
 427
 428       if (IsUser(cptr))
 429         sendrawto_one(cptr, MSG_PING " :%s", cli_name(&me));
 430       else
 431       {
 432         char *asll_ts = militime_float(NULL);
 433         sendcmdto_one(&me, CMD_PING, cptr, "!%s %s %s", asll_ts,
 434                       cli_name(cptr), asll_ts);
 435       }
 436     }
 437
 438     expire = cli_lasttime(cptr) + max_ping * 2;
 439     if (expire < next_check)
 440       next_check=expire;
 441   }
 442
 443   assert(next_check >= CurrentTime);
 444
 445   Debug((DEBUG_DEBUG, "[%i] check_pings() again in %is",
 446          CurrentTime, next_check-CurrentTime));
 447
 448   timer_add(&ping_timer, check_pings, 0, TT_ABSOLUTE, next_check);
 449 }
 450
 451
 452 /** Parse command line arguments.
 453  * Global variables are updated to reflect the arguments.
 454  * As a side effect, makes sure the process's effective user id is the
 455  * same as the real user id.
 456  * @param[in] argc Number of arguments on command line.
 457  * @param[in,out] argv Command-lne arguments.
 458  */
 459 static void parse_command_line(int argc, char** argv) {
 460   const char *options = "d:f:h:nktvx:c:";
 461   int opt;
 462
 463   if (thisServer.euid != thisServer.uid)
 464     setuid(thisServer.uid);
 465
 466   /* Do we really need to sanity check the non-NULLness of optarg?  That's
 467    * getopt()'s job...  Removing those... -zs
 468    */
 469   while ((opt = getopt(argc, argv, options)) != EOF)
 470     switch (opt) {
 471     case 'k':  thisServer.bootopt |= BOOT_CHKCONF | BOOT_TTY; break;
 472     case 'c':  dbg_client = optarg;                    break;
 473     case 'n':
 474     case 't':  thisServer.bootopt |= BOOT_TTY;         break;
 475     case 'd':  dpath      = optarg;                    break;
 476     case 'f':  configfile = optarg;                    break;
 477     case 'h':  ircd_strncpy(cli_name(&me), optarg, HOSTLEN); break;
 478     case 'v':
 479       printf("ircd %s\n", version);
 480       printf("Event engines: ");
 481 #ifdef USE_KQUEUE
 482       printf("kqueue() ");
 483 #endif
 484 #ifdef USE_DEVPOLL
 485       printf("/dev/poll ");
 486 #endif
 487 #ifdef USE_EPOLL
 488       printf("epoll_*() ");
 489 #endif
 490 #ifdef USE_POLL
 491       printf("poll()");
 492 #else
 493       printf("select()");
 494 #endif
 495       printf("\nCompiled for a maximum of %d connections.\n", MAXCONNECTIONS);
 496
 497
 498       exit(0);
 499       break;
 500
 501     case 'x':
 502       debuglevel = atoi(optarg);
 503       if (debuglevel < 0)
 504         debuglevel = 0;
 505       debugmode = optarg;
 506       thisServer.bootopt |= BOOT_DEBUG;
 507       break;
 508
 509     default:
 510       printf("Usage: ircd [-f config] [-h servername] [-x loglevel] [-ntv] [-k [-c clispec]]\n"
 511              "\n -f config\t specify explicit configuration file"
 512              "\n -x loglevel\t set debug logging verbosity"
 513              "\n -n or -t\t don't detach"
 514              "\n -v\t\t display version"
 515              "\n -k\t\t exit after checking config"
 516              "\n -c clispec\t search for client/kill blocks matching client"
 517              "\n\t\t clispec is comma-separated list of user@host,"
 518              "\n\t\t user@ip, $Rrealname, and port number"
 519              "\n\nServer not started.\n");
 520       exit(1);
 521     }
 522 }
 523
 524
 525 /** Become a daemon.
 526  * @param[in] no_fork If non-zero, do not fork into the background.
 527  */
 528 static void daemon_init(int no_fork) {
 529   if (no_fork)
 530     return;
 531
 532   if (fork())
 533     exit(0);
 534
 535 #ifdef TIOCNOTTY
 536   {
 537     int fd;
 538     if ((fd = open("/dev/tty", O_RDWR)) > -1) {
 539       ioctl(fd, TIOCNOTTY, 0);
 540       close(fd);
 541     }
 542   }
 543 #endif
 544
 545   setsid();
 546 }
 547
 548 /** Check that we have access to a particular file.
 549  * If we do not have access to the file, complain on stderr.
 550  * @param[in] path File name to check for access.
 551  * @param[in] which Configuration character associated with file.
 552  * @param[in] mode Bitwise combination of R_OK, W_OK, X_OK and/or F_OK.
 553  * @return Non-zero if we have the necessary access, zero if not.
 554  */
 555 static char check_file_access(const char *path, char which, int mode) {
 556   if (!access(path, mode))
 557     return 1;
 558
 559   fprintf(stderr,
 560           "Check on %cPATH (%s) failed: %s\n"
 561           "Please create this file and/or rerun `configure' "
 562           "using --with-%cpath and recompile to correct this.\n",
 563           which, path, strerror(errno), which);
 564
 565   return 0;
 566 }
 567
 568
 569 /*----------------------------------------------------------------------------
 570  * set_core_limit
 571  *--------------------------------------------------------------------------*/
 572 #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_CORE)
 573 /** Set the core size soft limit to the same as the hard limit. */
 574 static void set_core_limit(void) {
 575   struct rlimit corelim;
 576
 577   if (getrlimit(RLIMIT_CORE, &corelim)) {
 578     fprintf(stderr, "Read of rlimit core size failed: %s\n", strerror(errno));
 579     corelim.rlim_max = RLIM_INFINITY;   /* Try to recover */
 580   }
 581
 582   corelim.rlim_cur = corelim.rlim_max;
 583   if (setrlimit(RLIMIT_CORE, &corelim))
 584     fprintf(stderr, "Setting rlimit core size failed: %s\n", strerror(errno));
 585 }
 586 #endif
 587
 588
 589
 590 /** Complain to stderr if any user or group ID belongs to the superuser.
 591  * @return Non-zero if all IDs are okay, zero if some are 0.
 592  */
 593 static int set_userid_if_needed(void) {
 594   if (getuid() == 0 || geteuid() == 0 ||
 595       getgid() == 0 || getegid() == 0) {
 596     fprintf(stderr, "ERROR:  This server will not run as superuser.\n");
 597     return 0;
 598   }
 599
 600   return 1;
 601 }
 602
 603
 604 /*----------------------------------------------------------------------------
 605  * main - entrypoint
 606  *
 607  * TODO:  This should set the basic environment up and start the main loop.
 608  *        we're doing waaaaaaaaay too much server initialization here.  I hate
 609  *        long and ugly control paths...  -smd
 610  *--------------------------------------------------------------------------*/
 611 /** Run the daemon.
 612  * @param[in] argc Number of arguments in \a argv.
 613  * @param[in] argv Arguments to program execution.
 614  */
 615 int main(int argc, char **argv) {
 616   CurrentTime = time(NULL);
 617
 618   thisServer.argc = argc;
 619   thisServer.argv = argv;
 620   thisServer.uid  = getuid();
 621   thisServer.euid = geteuid();
 622
 623 #ifdef MDEBUG
 624   mem_dbg_initialise();
 625 #endif
 626
 627 #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_CORE)
 628   set_core_limit();
 629 #endif
 630
 631   umask(077);                   /* better safe than sorry --SRB */
 632   memset(&me, 0, sizeof(me));
 633   memset(&me_con, 0, sizeof(me_con));
 634   cli_connect(&me) = &me_con;
 635   cli_fd(&me) = -1;
 636
 637   parse_command_line(argc, argv);
 638
 639   if (chdir(dpath)) {
 640     fprintf(stderr, "Fail: Cannot chdir(%s): %s, check DPATH\n", dpath, strerror(errno));
 641     return 2;
 642   }
 643
 644   if (!set_userid_if_needed())
 645     return 3;
 646
 647   /* Check paths for accessibility */
 648   if (!check_file_access(SPATH, 'S', X_OK) ||
 649       !check_file_access(configfile, 'C', R_OK))
 650     return 4;
 651
 652   if (!init_connection_limits())
 653     return 9;
 654
 655   close_connections(!(thisServer.bootopt & (BOOT_DEBUG | BOOT_TTY | BOOT_CHKCONF)));
 656
 657   /* daemon_init() must be before event_init() because kqueue() FDs
 658    * are, perversely, not inherited across fork().
 659    */
 660   daemon_init(thisServer.bootopt & BOOT_TTY);
 661
 662 #ifdef DEBUGMODE
 663   /* Must reserve fd 2... */
 664   if (debuglevel >= 0 && !(thisServer.bootopt & BOOT_TTY)) {
 665     int fd;
 666     if ((fd = open("/dev/null", O_WRONLY)) < 0) {
 667       fprintf(stderr, "Unable to open /dev/null (to reserve fd 2): %s\n",
 668               strerror(errno));
 669       return 8;
 670     }
 671     if (fd != 2 && dup2(fd, 2) < 0) {
 672       fprintf(stderr, "Unable to reserve fd 2; dup2 said: %s\n",
 673               strerror(errno));
 674       return 8;
 675     }
 676   }
 677 #endif
 678
 679   event_init(MAXCONNECTIONS);
 680
 681   setup_signals();
 682   feature_init(); /* initialize features... */
 683   log_init(*argv);
 684   set_nomem_handler(outofmemory);
 685
 686   initload();
 687   init_list();
 688   init_hash();
 689   init_class();
 690   initwhowas();
 691   initmsgtree();
 692   initstats();
 693
 694   /* we need this for now, when we're modular this
 695      should be removed -- hikari */
 696   ircd_crypt_init();
 697
 698   motd_init();
 699
 700   if (!init_conf()) {
 701     log_write(LS_SYSTEM, L_CRIT, 0, "Failed to read configuration file %s",
 702               configfile);
 703     return 7;
 704   }
 705
 706   if (thisServer.bootopt & BOOT_CHKCONF) {
 707     if (dbg_client)
 708       conf_debug_iline(dbg_client);
 709     fprintf(stderr, "Configuration file %s checked okay.\n", configfile);
 710     return 0;
 711   }
 712
 713   debug_init(thisServer.bootopt & BOOT_TTY);
 714   if (check_pid()) {
 715     Debug((DEBUG_FATAL, "Failed to acquire PID file lock after fork"));
 716     exit(2);
 717   }
 718
 719   init_server_identity();
 720
 721   uping_init();
 722
 723   stats_init();
 724
 725   IPcheck_init();
 726   timer_add(timer_init(&connect_timer), try_connections, 0, TT_RELATIVE, 1);
 727   timer_add(timer_init(&ping_timer), check_pings, 0, TT_RELATIVE, 1);
 728   timer_add(timer_init(&destruct_event_timer), exec_expired_destruct_events, 0, TT_PERIODIC, 60);
 729
 730   CurrentTime = time(NULL);
 731
 732   SetMe(&me);
 733   cli_magic(&me) = CLIENT_MAGIC;
 734   cli_from(&me) = &me;
 735   make_server(&me);
 736
 737   cli_serv(&me)->timestamp = TStime();  /* Abuse own link timestamp as start TS */
 738   cli_serv(&me)->prot      = atoi(MAJOR_PROTOCOL);
 739   cli_serv(&me)->up        = &me;
 740   cli_serv(&me)->down      = NULL;
 741   cli_handler(&me)         = SERVER_HANDLER;
 742
 743   SetYXXCapacity(&me, MAXCLIENTS);
 744
 745   cli_lasttime(&me) = cli_since(&me) = cli_firsttime(&me) = CurrentTime;
 746
 747   hAddClient(&me);
 748
 749   write_pidfile();
 750   init_counters();
 751
 752   Debug((DEBUG_NOTICE, "Server ready..."));
 753   log_write(LS_SYSTEM, L_NOTICE, 0, "Server Ready");
 754
 755   event_loop();
 756
 757   return 0;
 758 }
 759
 760