ircd/ircd.c

   1 /*
   2  *  charybdis: A slightly useful ircd.
   3  *  ircd.c: Starts up and runs the ircd.
   4  *
   5  *  Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
   6  *  Copyright (C) 1996-2002 Hybrid Development Team
   7  *  Copyright (C) 2002-2008 ircd-ratbox development team
   8  *  Copyright (C) 2005-2013 charybdis development team
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation; either version 2 of the License, or
  13  *  (at your option) any later version.
  14  *
  15  *  This program is distributed in the hope that it will be useful,
  16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *  GNU General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License
  21  *  along with this program; if not, write to the Free Software
  22  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
  23  *  USA
  24  *
  25  *  $Id$
  26  */
  27
  28 #include "ratbox_lib.h"
  29 #include "stdinc.h"
  30 #include "setup.h"
  31 #include "config.h"
  32 #include "ircd.h"
  33 #include "channel.h"
  34 #include "class.h"
  35 #include "client.h"
  36 #include "common.h"
  37 #include "hash.h"
  38 #include "match.h"
  39 #include "ircd_signal.h"
  40 #include "msg.h"                /* msgtab */
  41 #include "hostmask.h"
  42 #include "numeric.h"
  43 #include "parse.h"
  44 #include "res.h"
  45 #include "restart.h"
  46 #include "s_auth.h"
  47 #include "s_conf.h"
  48 #include "logger.h"
  49 #include "s_serv.h"             /* try_connections */
  50 #include "s_user.h"
  51 #include "s_stats.h"
  52 #include "scache.h"
  53 #include "send.h"
  54 #include "supported.h"
  55 #include "whowas.h"
  56 #include "modules.h"
  57 #include "hook.h"
  58 #include "ircd_getopt.h"
  59 #include "newconf.h"
  60 #include "reject.h"
  61 #include "s_conf.h"
  62 #include "s_newconf.h"
  63 #include "cache.h"
  64 #include "monitor.h"
  65 #include "patchlevel.h"
  66 #include "serno.h"
  67 #include "sslproc.h"
  68 #include "chmode.h"
  69 #include "privilege.h"
  70 #include "bandbi.h"
  71 #include "authd.h"
  72
  73 /* /quote set variables */
  74 struct SetOptions GlobalSetOptions;
  75
  76 /* configuration set from ircd.conf */
  77 struct config_file_entry ConfigFileEntry;
  78 /* server info set from ircd.conf */
  79 struct server_info ServerInfo;
  80 /* admin info set from ircd.conf */
  81 struct admin_info AdminInfo;
  82
  83 struct Counter Count;
  84 struct ServerStatistics ServerStats;
  85
  86 int maxconnections;
  87 struct Client me;               /* That's me */
  88 struct LocalUser meLocalUser;   /* That's also part of me */
  89
  90 rb_dlink_list global_client_list;
  91
  92 /* unknown/client pointer lists */
  93 rb_dlink_list unknown_list;        /* unknown clients ON this server only */
  94 rb_dlink_list lclient_list;     /* local clients only ON this server */
  95 rb_dlink_list serv_list;           /* local servers to this server ONLY */
  96 rb_dlink_list global_serv_list;    /* global servers on the network */
  97 rb_dlink_list local_oper_list;     /* our opers, duplicated in lclient_list */
  98 rb_dlink_list oper_list;           /* network opers */
  99
 100 const char *logFileName = LPATH;
 101 const char *pidFileName = PPATH;
 102
 103 char **myargv;
 104 int dorehash = 0;
 105 int dorehashbans = 0;
 106 int doremotd = 0;
 107 int kline_queued = 0;
 108 int server_state_foreground = 0;
 109 int opers_see_all_users = 0;
 110 int ssl_ok = 0;
 111 int zlib_ok = 1;
 112
 113 int testing_conf = 0;
 114 time_t startup_time;
 115
 116 int default_server_capabs;
 117
 118 int splitmode;
 119 int splitchecking;
 120 int split_users;
 121 int split_servers;
 122 int eob_count;
 123
 124 void
 125 ircd_shutdown(const char *reason)
 126 {
 127         struct Client *target_p;
 128         rb_dlink_node *ptr;
 129
 130         RB_DLINK_FOREACH(ptr, lclient_list.head)
 131         {
 132                 target_p = ptr->data;
 133
 134                 sendto_one(target_p, ":%s NOTICE %s :Server Terminating. %s",
 135                         me.name, target_p->name, reason);
 136         }
 137
 138         RB_DLINK_FOREACH(ptr, serv_list.head)
 139         {
 140                 target_p = ptr->data;
 141
 142                 sendto_one(target_p, ":%s ERROR :Terminated by %s",
 143                         me.name, reason);
 144         }
 145
 146         ilog(L_MAIN, "Server Terminating. %s", reason);
 147         close_logfiles();
 148
 149         unlink(pidFileName);
 150         exit(0);
 151 }
 152
 153 /*
 154  * print_startup - print startup information
 155  */
 156 static void
 157 print_startup(int pid)
 158 {
 159         int fd;
 160
 161         close(1);
 162         fd = open("/dev/null", O_RDWR);
 163         if (fd == -1) {
 164                 perror("open /dev/null");
 165                 exit(EXIT_FAILURE);
 166         }
 167         if (fd == 0)
 168                 fd = dup(fd);
 169         if (fd != 1)
 170                 abort();
 171
 172         inotice("now running in %s mode from %s as pid %d ...",
 173                !server_state_foreground ? "background" : "foreground",
 174                 ConfigFileEntry.dpath, pid);
 175
 176         /* let the parent process know the initialization was successful
 177          * -- jilles */
 178         if (!server_state_foreground)
 179                 write(0, ".", 1);
 180         if (dup2(1, 0) == -1)
 181                 abort();
 182         if (dup2(1, 2) == -1)
 183                 abort();
 184 }
 185
 186 /*
 187  * init_sys
 188  *
 189  * inputs       - boot_daemon flag
 190  * output       - none
 191  * side effects - if boot_daemon flag is not set, don't daemonize
 192  */
 193 static void
 194 init_sys(void)
 195 {
 196 #if defined(RLIMIT_NOFILE) && defined(HAVE_SYS_RESOURCE_H)
 197         struct rlimit limit;
 198
 199         if(!getrlimit(RLIMIT_NOFILE, &limit))
 200         {
 201                 maxconnections = limit.rlim_cur;
 202                 if(maxconnections <= MAX_BUFFER)
 203                 {
 204                         fprintf(stderr, "ERROR: Shell FD limits are too low.\n");
 205                         fprintf(stderr, "ERROR: charybdis reserves %d FDs, shell limits must be above this\n", MAX_BUFFER);
 206                         exit(EXIT_FAILURE);
 207                 }
 208                 return;
 209         }
 210 #endif /* RLIMIT_FD_MAX */
 211         maxconnections = MAXCONNECTIONS;
 212 }
 213
 214 static int
 215 make_daemon(void)
 216 {
 217         int pid;
 218         int pip[2];
 219         char c;
 220
 221         if (pipe(pip) < 0)
 222         {
 223                 perror("pipe");
 224                 exit(EXIT_FAILURE);
 225         }
 226         dup2(pip[1], 0);
 227         close(pip[1]);
 228         if((pid = fork()) < 0)
 229         {
 230                 perror("fork");
 231                 exit(EXIT_FAILURE);
 232         }
 233         else if(pid > 0)
 234         {
 235                 close(0);
 236                 /* Wait for initialization to finish, successfully or
 237                  * unsuccessfully. Until this point the child may still
 238                  * write to stdout/stderr.
 239                  * -- jilles */
 240                 if (read(pip[0], &c, 1) > 0)
 241                         exit(EXIT_SUCCESS);
 242                 else
 243                         exit(EXIT_FAILURE);
 244         }
 245
 246         close(pip[0]);
 247         setsid();
 248 /*      fclose(stdin);
 249         fclose(stdout);
 250         fclose(stderr); */
 251
 252         return 0;
 253 }
 254
 255 static int printVersion = 0;
 256
 257 struct lgetopt myopts[] = {
 258         {"configfile", &ConfigFileEntry.configfile,
 259          STRING, "File to use for ircd.conf"},
 260         {"logfile", &logFileName,
 261          STRING, "File to use for ircd.log"},
 262         {"pidfile", &pidFileName,
 263          STRING, "File to use for process ID"},
 264         {"foreground", &server_state_foreground,
 265          YESNO, "Run in foreground (don't detach)"},
 266         {"version", &printVersion,
 267          YESNO, "Print version and exit"},
 268         {"conftest", &testing_conf,
 269          YESNO, "Test the configuration files and exit"},
 270         {"help", NULL, USAGE, "Print this text"},
 271         {NULL, NULL, STRING, NULL},
 272 };
 273
 274 static void
 275 check_rehash(void *unused)
 276 {
 277         /*
 278          * Check to see whether we have to rehash the configuration ..
 279          */
 280         if(dorehash)
 281         {
 282                 rehash(1);
 283                 dorehash = 0;
 284         }
 285
 286         if(dorehashbans)
 287         {
 288                 rehash_bans(1);
 289                 dorehashbans = 0;
 290         }
 291
 292         if(doremotd)
 293         {
 294                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 295                                      "Got signal SIGUSR1, reloading ircd motd file");
 296                 cache_user_motd();
 297                 doremotd = 0;
 298         }
 299 }
 300
 301 /*
 302  * initalialize_global_set_options
 303  *
 304  * inputs       - none
 305  * output       - none
 306  * side effects - This sets all global set options needed
 307  */
 308 static void
 309 initialize_global_set_options(void)
 310 {
 311         memset(&GlobalSetOptions, 0, sizeof(GlobalSetOptions));
 312         /* memset( &ConfigFileEntry, 0, sizeof(ConfigFileEntry)); */
 313
 314         GlobalSetOptions.maxclients = ServerInfo.default_max_clients;
 315
 316         if(GlobalSetOptions.maxclients > (maxconnections - MAX_BUFFER) || (GlobalSetOptions.maxclients <= 0))
 317                 GlobalSetOptions.maxclients = maxconnections - MAX_BUFFER;
 318
 319         GlobalSetOptions.autoconn = 1;
 320
 321         GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
 322         GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
 323
 324         GlobalSetOptions.floodcount = ConfigFileEntry.default_floodcount;
 325
 326         split_servers = ConfigChannel.default_split_server_count;
 327         split_users = ConfigChannel.default_split_user_count;
 328
 329         if(split_users && split_servers
 330            && (ConfigChannel.no_create_on_split || ConfigChannel.no_join_on_split))
 331         {
 332                 splitmode = 1;
 333                 splitchecking = 1;
 334         }
 335
 336         GlobalSetOptions.ident_timeout = ConfigFileEntry.default_ident_timeout;
 337
 338         rb_strlcpy(GlobalSetOptions.operstring,
 339                 ConfigFileEntry.default_operstring,
 340                 sizeof(GlobalSetOptions.operstring));
 341         rb_strlcpy(GlobalSetOptions.adminstring,
 342                 ConfigFileEntry.default_adminstring,
 343                 sizeof(GlobalSetOptions.adminstring));
 344
 345         /* memset( &ConfigChannel, 0, sizeof(ConfigChannel)); */
 346
 347         /* End of global set options */
 348
 349 }
 350
 351 /*
 352  * initialize_server_capabs
 353  *
 354  * inputs       - none
 355  * output       - none
 356  */
 357 static void
 358 initialize_server_capabs(void)
 359 {
 360         default_server_capabs &= ~CAP_ZIP;
 361 }
 362
 363
 364 /*
 365  * write_pidfile
 366  *
 367  * inputs       - filename+path of pid file
 368  * output       - none
 369  * side effects - write the pid of the ircd to filename
 370  */
 371 static void
 372 write_pidfile(const char *filename)
 373 {
 374         FILE *fb;
 375         char buff[32];
 376         if((fb = fopen(filename, "w")))
 377         {
 378                 unsigned int pid = (unsigned int) getpid();
 379
 380                 rb_snprintf(buff, sizeof(buff), "%u\n", pid);
 381                 if((fputs(buff, fb) == -1))
 382                 {
 383                         ilog(L_MAIN, "Error writing %u to pid file %s (%s)",
 384                              pid, filename, strerror(errno));
 385                 }
 386                 fclose(fb);
 387                 return;
 388         }
 389         else
 390         {
 391                 ilog(L_MAIN, "Error opening pid file %s", filename);
 392         }
 393 }
 394
 395 /*
 396  * check_pidfile
 397  *
 398  * inputs       - filename+path of pid file
 399  * output       - none
 400  * side effects - reads pid from pidfile and checks if ircd is in process
 401  *                list. if it is, gracefully exits
 402  * -kre
 403  */
 404 static void
 405 check_pidfile(const char *filename)
 406 {
 407         FILE *fb;
 408         char buff[32];
 409         pid_t pidfromfile;
 410
 411         /* Don't do logging here, since we don't have log() initialised */
 412         if((fb = fopen(filename, "r")))
 413         {
 414                 if(fgets(buff, 20, fb) != NULL)
 415                 {
 416                         pidfromfile = atoi(buff);
 417                         if(!kill(pidfromfile, 0))
 418                         {
 419                                 printf("ircd: daemon is already running\n");
 420                                 exit(-1);
 421                         }
 422                 }
 423                 fclose(fb);
 424         }
 425 }
 426
 427 /*
 428  * setup_corefile
 429  *
 430  * inputs       - nothing
 431  * output       - nothing
 432  * side effects - setups corefile to system limits.
 433  * -kre
 434  */
 435 static void
 436 setup_corefile(void)
 437 {
 438 #ifdef HAVE_SYS_RESOURCE_H
 439         struct rlimit rlim;     /* resource limits */
 440
 441         /* Set corefilesize to maximum */
 442         if(!getrlimit(RLIMIT_CORE, &rlim))
 443         {
 444                 rlim.rlim_cur = rlim.rlim_max;
 445                 setrlimit(RLIMIT_CORE, &rlim);
 446         }
 447 #endif
 448 }
 449
 450 static void
 451 ircd_log_cb(const char *str)
 452 {
 453         ilog(L_MAIN, "libratbox reports: %s", str);
 454 }
 455
 456 static void
 457 ircd_restart_cb(const char *str)
 458 {
 459         inotice("libratbox has called the restart callback: %s", str);
 460         restart(str);
 461 }
 462
 463 /*
 464  * Why EXIT_FAILURE here?
 465  * Because if ircd_die_cb() is called it's because of a fatal
 466  * error inside libcharybdis, and we don't know how to handle the
 467  * exception, so it is logical to return a FAILURE exit code here.
 468  *    --nenolod
 469  */
 470 static void
 471 ircd_die_cb(const char *str)
 472 {
 473         if(str != NULL)
 474         {
 475                 /* Try to get the message out to currently logged in operators. */
 476                 sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "libratbox has called the die callback..aborting: %s", str);
 477                 inotice("libratbox has called the die callback..aborting: %s", str);
 478         }
 479         else
 480                 inotice("libratbox has called the die callback..aborting");
 481
 482         unlink(pidFileName);
 483         exit(EXIT_FAILURE);
 484 }
 485
 486 struct ev_entry *check_splitmode_ev = NULL;
 487
 488 static int
 489 seed_with_urandom(void)
 490 {
 491         unsigned int seed;
 492         int fd;
 493
 494         fd = open("/dev/urandom", O_RDONLY);
 495         if(fd >= 0)
 496         {
 497                 if(read(fd, &seed, sizeof(seed)) == sizeof(seed))
 498                 {
 499                         close(fd);
 500                         srand(seed);
 501                         return 1;
 502                 }
 503                 close(fd);
 504         }
 505         return 0;
 506 }
 507
 508 static void
 509 seed_with_clock(void)
 510 {
 511         const struct timeval *tv;
 512         rb_set_time();
 513         tv = rb_current_time_tv();
 514         srand(tv->tv_sec ^ (tv->tv_usec | (getpid() << 20)));
 515 }
 516
 517 static void
 518 seed_random(void *unused)
 519 {
 520         unsigned int seed;
 521         if(rb_get_random(&seed, sizeof(seed)) == -1)
 522         {
 523                 if(!seed_with_urandom())
 524                         seed_with_clock();
 525                 return;
 526         }
 527         srand(seed);
 528 }
 529
 530 /*
 531  * main
 532  *
 533  * Initializes the IRCd.
 534  *
 535  * Inputs       - number of commandline args, args themselves
 536  * Outputs      - none
 537  * Side Effects - this is where the ircd gets going right now
 538  */
 539 int
 540 charybdis_main(int argc, char *argv[])
 541 {
 542         int fd;
 543
 544         /* Check to see if the user is running us as root, which is a nono */
 545         if(geteuid() == 0)
 546         {
 547                 fprintf(stderr, "Don't run ircd as root!!!\n");
 548                 return -1;
 549         }
 550
 551         init_sys();
 552
 553         ConfigFileEntry.dpath = DPATH;
 554         ConfigFileEntry.configfile = CPATH;     /* Server configuration file */
 555         ConfigFileEntry.connect_timeout = 30;   /* Default to 30 */
 556
 557         umask(077);             /* better safe than sorry --SRB */
 558
 559         myargv = argv;
 560         parseargs(&argc, &argv, myopts);
 561
 562         if(chdir(ConfigFileEntry.dpath))
 563         {
 564                 fprintf(stderr, "Unable to chdir to %s: %s\n", ConfigFileEntry.dpath, strerror(errno));
 565                 exit(EXIT_FAILURE);
 566         }
 567
 568         rb_set_time();
 569
 570         /*
 571          * Setup corefile size immediately after boot -kre
 572          */
 573         setup_corefile();
 574
 575         memset(&me, 0, sizeof(me));
 576         memset(&meLocalUser, 0, sizeof(meLocalUser));
 577         me.localClient = &meLocalUser;
 578
 579         /* Make sure all lists are zeroed */
 580         memset(&unknown_list, 0, sizeof(unknown_list));
 581         memset(&lclient_list, 0, sizeof(lclient_list));
 582         memset(&serv_list, 0, sizeof(serv_list));
 583         memset(&global_serv_list, 0, sizeof(global_serv_list));
 584         memset(&local_oper_list, 0, sizeof(local_oper_list));
 585         memset(&oper_list, 0, sizeof(oper_list));
 586
 587         rb_dlinkAddTail(&me, &me.node, &global_client_list);
 588
 589         memset(&Count, 0, sizeof(Count));
 590         memset(&ServerInfo, 0, sizeof(ServerInfo));
 591         memset(&AdminInfo, 0, sizeof(AdminInfo));
 592         memset(&ServerStats, 0, sizeof(struct ServerStatistics));
 593
 594         if(printVersion)
 595         {
 596                 printf("ircd: version %s(%s)\n", ircd_version, serno);
 597 #ifdef CUSTOM_BRANDING
 598                 printf("ircd: based on %s-%s\n", PACKAGE_NAME, PACKAGE_VERSION);
 599 #endif
 600                 printf("ircd: %s\n", rb_lib_version());
 601                 exit(EXIT_SUCCESS);
 602         }
 603
 604         setup_signals();
 605
 606         if (testing_conf)
 607                 server_state_foreground = 1;
 608
 609         /* Make sure fd 0, 1 and 2 are in use -- jilles */
 610         do
 611         {
 612                 fd = open("/dev/null", O_RDWR);
 613         } while (fd < 2 && fd != -1);
 614         if (fd > 2)
 615                 close(fd);
 616         else if (fd == -1)
 617                 exit(1);
 618
 619         /* Check if there is pidfile and daemon already running */
 620         if(!testing_conf)
 621         {
 622                 check_pidfile(pidFileName);
 623
 624                 if(!server_state_foreground)
 625                         make_daemon();
 626                 inotice("starting %s ...", ircd_version);
 627                 inotice("%s", rb_lib_version());
 628         }
 629
 630         /* Init the event subsystem */
 631         rb_lib_init(ircd_log_cb, ircd_restart_cb, ircd_die_cb, !server_state_foreground, maxconnections, DNODE_HEAP_SIZE, FD_HEAP_SIZE);
 632         rb_linebuf_init(LINEBUF_HEAP_SIZE);
 633
 634         rb_init_prng(NULL, RB_PRNG_DEFAULT);
 635
 636         seed_random(NULL);
 637
 638         init_builtin_capabs();
 639         default_server_capabs = CAP_MASK;
 640
 641         init_main_logfile();
 642         newconf_init();
 643         init_s_conf();
 644         init_s_newconf();
 645         init_hash();
 646         clear_scache_hash_table();      /* server cache name table */
 647         init_host_hash();
 648         clear_hash_parse();
 649         init_client();
 650         init_hook();
 651         init_channels();
 652         initclass();
 653         initwhowas();
 654         init_reject();
 655         init_cache();
 656         init_monitor();
 657
 658         construct_cflags_strings();
 659
 660         load_all_modules(1);
 661         load_core_modules(1);
 662
 663         init_auth();            /* Initialise the auth code */
 664         init_authd();           /* Start up authd. */
 665         init_resolver();        /* Needs to be setup before the io loop */
 666         privilegeset_set_new("default", "", 0);
 667
 668         if (testing_conf)
 669                 fprintf(stderr, "\nBeginning config test\n");
 670         read_conf_files(YES);   /* cold start init conf files */
 671
 672         mod_add_path(MODULE_DIR);
 673         mod_add_path(MODULE_DIR "/autoload");
 674
 675         init_isupport();
 676
 677         init_bandb();
 678         init_ssld();
 679
 680         rehash_bans(0);
 681
 682         initialize_server_capabs();     /* Set up default_server_capabs */
 683         initialize_global_set_options();
 684
 685         if(ServerInfo.name == NULL)
 686         {
 687                 ierror("no server name specified in serverinfo block.");
 688                 return -1;
 689         }
 690         rb_strlcpy(me.name, ServerInfo.name, sizeof(me.name));
 691
 692         if(ServerInfo.sid[0] == '\0')
 693         {
 694                 ierror("no server sid specified in serverinfo block.");
 695                 return -2;
 696         }
 697         strcpy(me.id, ServerInfo.sid);
 698         init_uid();
 699
 700         /* serverinfo{} description must exist.  If not, error out. */
 701         if(ServerInfo.description == NULL)
 702         {
 703                 ierror("no server description specified in serverinfo block.");
 704                 return -3;
 705         }
 706         rb_strlcpy(me.info, ServerInfo.description, sizeof(me.info));
 707
 708         if(ServerInfo.ssl_cert != NULL && ServerInfo.ssl_private_key != NULL)
 709         {
 710                 /* just do the rb_setup_ssl_server to validate the config */
 711                 if(!rb_setup_ssl_server(ServerInfo.ssl_cert, ServerInfo.ssl_private_key, ServerInfo.ssl_dh_params, ServerInfo.ssl_cipher_list))
 712                 {
 713                         ilog(L_MAIN, "WARNING: Unable to setup SSL.");
 714                         ssl_ok = 0;
 715                 }
 716                 else
 717                         ssl_ok = 1;
 718         }
 719
 720         if (testing_conf)
 721         {
 722                 fprintf(stderr, "\nConfig testing complete.\n");
 723                 fflush(stderr);
 724                 return 0;       /* Why? We want the launcher to exit out. */
 725         }
 726
 727         me.from = &me;
 728         me.servptr = &me;
 729         SetMe(&me);
 730         make_server(&me);
 731         startup_time = rb_current_time();
 732         add_to_client_hash(me.name, &me);
 733         add_to_id_hash(me.id, &me);
 734         me.serv->nameinfo = scache_connect(me.name, me.info, 0);
 735
 736         rb_dlinkAddAlloc(&me, &global_serv_list);
 737
 738         construct_umodebuf();
 739
 740         check_class();
 741         write_pidfile(pidFileName);
 742         load_help();
 743         open_logfiles();
 744
 745         ilog(L_MAIN, "Server Ready");
 746
 747         /* We want try_connections to be called as soon as possible now! -- adrian */
 748         /* No, 'cause after a restart it would cause all sorts of nick collides */
 749         /* um.  by waiting even longer, that just means we have even *more*
 750          * nick collisions.  what a stupid idea. set an event for the IO loop --fl
 751          */
 752         rb_event_addish("try_connections", try_connections, NULL, STARTUP_CONNECTIONS_TIME);
 753         rb_event_addonce("try_connections_startup", try_connections, NULL, 2);
 754         rb_event_add("check_rehash", check_rehash, NULL, 3);
 755         rb_event_addish("reseed_srand", seed_random, NULL, 300); /* reseed every 10 minutes */
 756
 757         if(splitmode)
 758                 check_splitmode_ev = rb_event_add("check_splitmode", check_splitmode, NULL, 5);
 759
 760         print_startup(getpid());
 761
 762         rb_lib_loop(0);
 763
 764         return 0;
 765 }