trunk/src/ircd.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 1997-2019 ircd-hybrid development team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
 *  USA
 */

/*! \file ircd.c
 * \brief Starts up and runs the ircd.
 * \version $Id$
 */

#include "stdinc.h"
#include "user.h"
#include "list.h"
#include "ircd.h"
#include "channel.h"
#include "channel_mode.h"
#include "client.h"
#include "event.h"
#include "fdlist.h"
#include "hash.h"
#include "id.h"
#include "irc_string.h"
#include "ircd_signal.h"
#include "motd.h"
#include "conf.h"
#include "hostmask.h"
#include "parse.h"
#include "res.h"
#include "restart.h"
#include "rng_mt.h"
#include "s_bsd.h"
#include "log.h"
#include "server.h"
#include "server_capab.h"
#include "send.h"
#include "modules.h"
#include "memory.h"
#include "ircd_getopt.h"
#include "conf_db.h"
#include "conf_class.h"
#include "ipcache.h"
#include "isupport.h"
#include "patchlevel.h"
#include "serno.h"


struct SetOptions GlobalSetOptions;  /* /quote set variables */
struct Counter Count;
struct ServerState_t server_state;
struct ServerStatistics ServerStats;
struct ServerTime SystemTime;
struct Connection meConnection;  /* That's also part of me */
struct Client me = { .connection = &meConnection };  /* That's me */

char **myargv;
const char *logFileName = LPATH;
const char *pidFileName = PPATH;

bool dorehash;
bool doremotd;

static bool printVersion;

static struct lgetopt myopts[] =
{
  { "configfile", &ConfigGeneral.configfile,
   STRING, "File to use for ircd.conf" },
  { "klinefile",  &ConfigGeneral.klinefile,
   STRING, "File to use for kline database" },
  { "dlinefile",  &ConfigGeneral.dlinefile,
   STRING, "File to use for dline database" },
  { "xlinefile",  &ConfigGeneral.xlinefile,
   STRING, "File to use for xline database" },
  { "resvfile",   &ConfigGeneral.resvfile,
   STRING, "File to use for resv database" },
  { "logfile",    &logFileName,
   STRING, "File to use for ircd.log" },
  { "pidfile",    &pidFileName,
   STRING, "File to use for process ID" },
  { "foreground", &server_state.foreground,
   BOOLEAN, "Run in foreground (don't detach)" },
  { "version",    &printVersion,
   BOOLEAN, "Print version and exit" },
  { "help", NULL, USAGE, "Print this text" },
  { NULL, NULL, STRING, NULL },
};

static struct event event_cleanup_tklines =
{
  .name = "cleanup_tklines",
  .handler = cleanup_tklines,
  .when = CLEANUP_TKLINES_TIME
};

static struct event event_try_connections =
{
  .name = "try_connections",
  .handler = try_connections,
  .when = STARTUP_CONNECTIONS_TIME
};

static struct event event_comm_checktimeouts =
{
  .name = "comm_checktimeouts",
  .handler = comm_checktimeouts,
  .when = 1
};

static struct event event_save_all_databases =
{
  .name = "save_all_databases",
  .handler = save_all_databases,
  .when = DATABASE_UPDATE_TIMEOUT
};

struct event event_write_links_file =
{
  .name = "write_links_file",
  .handler = write_links_file,
};


void
set_time(void)
{
  struct timeval newtime = { .tv_sec = 0, .tv_usec = 0 };

  if (gettimeofday(&newtime, NULL) == -1)
  {
    char buf[IRCD_BUFSIZE];

    snprintf(buf, sizeof(buf), "Clock failure, TS can be corrupted: %s",
             strerror(errno));
    server_die(buf, false);
  }

  if ((uintmax_t)newtime.tv_sec < CurrentTime)
  {
    ilog(LOG_TYPE_IRCD, "System clock is running backwards - (%ju < %ju)",
         (uintmax_t)newtime.tv_sec, CurrentTime);
    sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
                         "System clock is running backwards - (%ju < %ju)",
                         (uintmax_t)newtime.tv_sec, CurrentTime);
    event_set_back_events(CurrentTime - (uintmax_t)newtime.tv_sec);
  }

  SystemTime.tv_sec = newtime.tv_sec;
  SystemTime.tv_usec = newtime.tv_usec;
}

static void
io_loop(void)
{
  while (true)
  {
    if (listing_client_list.head)
    {
      dlink_node *node = NULL, *node_next = NULL;
      DLINK_FOREACH_SAFE(node, node_next, listing_client_list.head)
        safe_list_channels(node->data, false);
    }

    /* Run pending events */
    event_run();

    comm_select();
    exit_aborted_clients();
    free_exited_clients();

    /* Check to see whether we have to rehash the configuration. */
    if (dorehash == true)
    {
      conf_rehash(true);
      dorehash = false;
    }

    if (doremotd == true)
    {
      motd_recache();
      sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE,
                           "Got signal SIGUSR1, reloading motd file(s)");
      doremotd = false;
    }
  }
}

/* initalialize_global_set_options()
 *
 * inputs       - none
 * output       - none
 * side effects - This sets all global set options needed
 */
static void
initialize_global_set_options(void)
{
  GlobalSetOptions.maxclients = ConfigServerInfo.default_max_clients;
  GlobalSetOptions.autoconn = true;
  GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
  GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
  GlobalSetOptions.floodcount = ConfigGeneral.default_floodcount;
  GlobalSetOptions.floodtime = ConfigGeneral.default_floodtime;
  GlobalSetOptions.joinfloodcount = ConfigChannel.default_join_flood_count;
  GlobalSetOptions.joinfloodtime = ConfigChannel.default_join_flood_time;
}

/* write_pidfile()
 *
 * inputs       - filename+path of pid file
 * output       - NONE
 * side effects - write the pid of the ircd to filename
 */
static void
write_pidfile(const char *filename)
{
  FILE *fb;

  if ((fb = fopen(filename, "w")))
  {
    char buf[IRCD_BUFSIZE];
    unsigned int pid = (unsigned int)getpid();

    snprintf(buf, sizeof(buf), "%u\n", pid);

    if (fputs(buf, fb) == -1)
      ilog(LOG_TYPE_IRCD, "Error writing to pid file %s: %s",
           filename, strerror(errno));

    fclose(fb);
  }
  else
    ilog(LOG_TYPE_IRCD, "Error opening pid file %s: %s",
         filename, strerror(errno));
}

/* check_pidfile()
 *
 * inputs       - filename+path of pid file
 * output       - none
 * side effects - reads pid from pidfile and checks if ircd is in process
 *                list. if it is, gracefully exits
 * -kre
 */
static void
check_pidfile(const char *filename)
{
  FILE *fb;
  char buf[IRCD_BUFSIZE];

  if ((fb = fopen(filename, "r")))
  {
    if (fgets(buf, 20, fb) == NULL)
      ilog(LOG_TYPE_IRCD, "Error reading from pid file %s: %s",
           filename, strerror(errno));
    else
    {
      pid_t pid = atoi(buf);

      if (kill(pid, 0) == 0)
      {
        /* log(L_ERROR, "Server is already running"); */
        printf("ircd: daemon is already running\n");
        exit(EXIT_FAILURE);
      }
    }

    fclose(fb);
  }
  else if (errno != ENOENT)
    ilog(LOG_TYPE_IRCD, "Error opening pid file %s: %s",
         filename, strerror(errno));
}

/* setup_corefile()
 *
 * inputs       - nothing
 * output       - nothing
 * side effects - setups corefile to system limits.
 * -kre
 */
static void
setup_corefile(void)
{
  struct rlimit rlim; /* resource limits */

  /* Set corefilesize to maximum */
  if (getrlimit(RLIMIT_CORE, &rlim) == 0)
  {
    rlim.rlim_cur = rlim.rlim_max;
    setrlimit(RLIMIT_CORE, &rlim);
  }
}

static void
setup_fdlimit(void)
{
  struct rlimit rlim; /* resource limits */

  if (getrlimit(RLIMIT_NOFILE, &rlim))
  {
    fprintf(stderr, "getrlimit: couldn't get maximum number of file descriptors: %s\n",
            strerror(errno));
    exit(EXIT_FAILURE);
  }

  if (rlim.rlim_max > 0xFFFF)
    rlim.rlim_max = 0xFFFF;
  rlim.rlim_cur = rlim.rlim_max;

  if (setrlimit(RLIMIT_NOFILE, &rlim) == 0)
    hard_fdlimit = rlim.rlim_cur;
  else
  {
    fprintf(stderr, "setrlimit: couldn't set maximum number of file descriptors: %s\n",
            strerror(errno));
    exit(EXIT_FAILURE);
  }
}

/*
 * print_startup - print startup information
 */
static void
print_startup(int pid)
{
  printf("ircd: version %s(%s)\n", PATCHLEVEL, SERIALNUM);
  printf("ircd: pid %d\n", pid);
  printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
         : "foreground", ConfigGeneral.dpath);
}

static void
make_daemon(void)
{
  int pid;

  if ((pid = fork()) < 0)
  {
    perror("fork");
    exit(EXIT_FAILURE);
  }
  else if (pid > 0)
  {
    print_startup(pid);
    exit(EXIT_SUCCESS);
  }

  setsid();
}

int
main(int argc, char *argv[])
{
  /* Check to see if the user is running us as root, which is a nono */
  if (geteuid() == 0)
  {
    fprintf(stderr, "ERROR: This server won't run as root/superuser\n");
    return -1;
  }

  /* Setup corefile size immediately after boot -kre */
  setup_corefile();

  setup_fdlimit();

  /* Save server boot time right away, so getrusage works correctly */
  set_time();

  /* It's not random, but it ought to be a little harder to guess */
  init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec | (getpid() << 20)));

  ConfigGeneral.dpath      = DPATH;
  ConfigGeneral.spath      = SPATH;
  ConfigGeneral.mpath      = MPATH;
  ConfigGeneral.configfile = CPATH;    /* Server configuration file */
  ConfigGeneral.klinefile  = KPATH;    /* Server kline file         */
  ConfigGeneral.xlinefile  = XPATH;    /* Server xline file         */
  ConfigGeneral.dlinefile  = DLPATH;   /* dline file                */
  ConfigGeneral.resvfile   = RESVPATH; /* resv file                 */

  myargv = argv;
  umask(077);  /* umask 077: u=rwx,g=,o= */

  parseargs(&argc, &argv, myopts);

  if (printVersion == true)
  {
    printf("ircd: version %s(%s)\n", PATCHLEVEL, SERIALNUM);
    exit(EXIT_SUCCESS);
  }

  if (chdir(ConfigGeneral.dpath))
  {
    perror("chdir");
    exit(EXIT_FAILURE);
  }

  if (server_state.foreground == false)
  {
    make_daemon();
    close_standard_fds(); /* this needs to be before comm_select_init()! */
  }
  else
    print_startup(getpid());

  setup_signals();

  /* We need this to initialise the fd array before anything else */
  fdlist_init();
  log_set_file(LOG_TYPE_IRCD, 0, logFileName);

  comm_select_init();  /* This needs to be setup early ! -- adrian */
  tls_init();

  /* Check if there is pidfile and daemon already running */
  check_pidfile(pidFileName);

  isupport_init();
  hash_init();
  ipcache_init();
  client_init();
  class_init();
  resolver_init();      /* Needs to be setup before the io loop */
  modules_init();
  read_conf_files(true);   /* cold start init conf files */
  capab_init();  /* Set up default_server_capabs */
  initialize_global_set_options();  /* Has to be called after read_conf_files() */
  channel_mode_init();
  read_links_file();
  motd_init();
  user_modes_init();

  if (EmptyString(ConfigServerInfo.name))
  {
    ilog(LOG_TYPE_IRCD, "ERROR: No server name specified in serverinfo block.");
    exit(EXIT_FAILURE);
  }

  strlcpy(me.name, ConfigServerInfo.name, sizeof(me.name));

  /* serverinfo {} description must exist.  If not, error out.*/
  if (EmptyString(ConfigServerInfo.description))
  {
    ilog(LOG_TYPE_IRCD, "ERROR: No server description specified in serverinfo block.");
    exit(EXIT_FAILURE);
  }

  strlcpy(me.info, ConfigServerInfo.description, sizeof(me.info));

  if (EmptyString(ConfigServerInfo.sid))
  {
    ilog(LOG_TYPE_IRCD, "Generating server ID");
    generate_sid();
  }
  else
    strlcpy(me.id, ConfigServerInfo.sid, sizeof(me.id));

  init_uid();

  me.from = &me;
  me.servptr = &me;
  me.connection->lasttime = CurrentTime;
  me.connection->since = CurrentTime;
  me.connection->firsttime = CurrentTime;

  SetMe(&me);
  server_make(&me);

  hash_add_id(&me);
  hash_add_client(&me);

  dlinkAdd(&me, &me.node, &global_server_list);

  load_kline_database(ConfigGeneral.klinefile);
  load_dline_database(ConfigGeneral.dlinefile);
  load_xline_database(ConfigGeneral.xlinefile);
  load_resv_database(ConfigGeneral.resvfile);

  load_all_modules(true);
  load_conf_modules();
  load_core_modules(true);

  write_pidfile(pidFileName);

  event_addish(&event_cleanup_tklines, NULL);

  /* We want try_connections to be called as soon as possible now! -- adrian */
  /* No, 'cause after a restart it would cause all sorts of nick collides */
  event_addish(&event_try_connections, NULL);

  /* Setup the timeout check. I'll shift it later :)  -- adrian */
  event_add(&event_comm_checktimeouts, NULL);

  event_addish(&event_save_all_databases, NULL);

  if (ConfigServerHide.flatten_links_delay && event_write_links_file.active == false)
  {
    event_write_links_file.when = ConfigServerHide.flatten_links_delay;
    event_add(&event_write_links_file, NULL);
  }

  ilog(LOG_TYPE_IRCD, "Server ready. Running version: %s(%s)", PATCHLEVEL, SERIALNUM);
  io_loop();

  return 0;
}
1	/*
2	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	*
4	* Copyright (c) 1997-2019 ircd-hybrid development team
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 2 of the License, or
9	* (at your option) 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
19	* USA
20	*/
21
22	/*! \file ircd.c
23	* \brief Starts up and runs the ircd.
24	* \version $Id$
25	*/
26
27	#include "stdinc.h"
28	#include "user.h"
29	#include "list.h"
30	#include "ircd.h"
31	#include "channel.h"
32	#include "channel_mode.h"
33	#include "client.h"
34	#include "event.h"
35	#include "fdlist.h"
36	#include "hash.h"
37	#include "id.h"
38	#include "irc_string.h"
39	#include "ircd_signal.h"
40	#include "motd.h"
41	#include "conf.h"
42	#include "hostmask.h"
43	#include "parse.h"
44	#include "res.h"
45	#include "restart.h"
46	#include "rng_mt.h"
47	#include "s_bsd.h"
48	#include "log.h"
49	#include "server.h"
50	#include "server_capab.h"
51	#include "send.h"
52	#include "modules.h"
53	#include "memory.h"
54	#include "ircd_getopt.h"
55	#include "conf_db.h"
56	#include "conf_class.h"
57	#include "ipcache.h"
58	#include "isupport.h"
59	#include "patchlevel.h"
60	#include "serno.h"
61
62
63	struct SetOptions GlobalSetOptions; /* /quote set variables */
64	struct Counter Count;
65	struct ServerState_t server_state;
66	struct ServerStatistics ServerStats;
67	struct ServerTime SystemTime;
68	struct Connection meConnection; /* That's also part of me */
69	struct Client me = { .connection = &meConnection }; /* That's me */
70
71	char **myargv;
72	const char *logFileName = LPATH;
73	const char *pidFileName = PPATH;
74
75	bool dorehash;
76	bool doremotd;
77
78	static bool printVersion;
79
80	static struct lgetopt myopts[] =
81	{
82	{ "configfile", &ConfigGeneral.configfile,
83	STRING, "File to use for ircd.conf" },
84	{ "klinefile", &ConfigGeneral.klinefile,
85	STRING, "File to use for kline database" },
86	{ "dlinefile", &ConfigGeneral.dlinefile,
87	STRING, "File to use for dline database" },
88	{ "xlinefile", &ConfigGeneral.xlinefile,
89	STRING, "File to use for xline database" },
90	{ "resvfile", &ConfigGeneral.resvfile,
91	STRING, "File to use for resv database" },
92	{ "logfile", &logFileName,
93	STRING, "File to use for ircd.log" },
94	{ "pidfile", &pidFileName,
95	STRING, "File to use for process ID" },
96	{ "foreground", &server_state.foreground,
97	BOOLEAN, "Run in foreground (don't detach)" },
98	{ "version", &printVersion,
99	BOOLEAN, "Print version and exit" },
100	{ "help", NULL, USAGE, "Print this text" },
101	{ NULL, NULL, STRING, NULL },
102	};
103
104	static struct event event_cleanup_tklines =
105	{
106	.name = "cleanup_tklines",
107	.handler = cleanup_tklines,
108	.when = CLEANUP_TKLINES_TIME
109	};
110
111	static struct event event_try_connections =
112	{
113	.name = "try_connections",
114	.handler = try_connections,
115	.when = STARTUP_CONNECTIONS_TIME
116	};
117
118	static struct event event_comm_checktimeouts =
119	{
120	.name = "comm_checktimeouts",
121	.handler = comm_checktimeouts,
122	.when = 1
123	};
124
125	static struct event event_save_all_databases =
126	{
127	.name = "save_all_databases",
128	.handler = save_all_databases,
129	.when = DATABASE_UPDATE_TIMEOUT
130	};
131
132	struct event event_write_links_file =
133	{
134	.name = "write_links_file",
135	.handler = write_links_file,
136	};
137
138
139	void
140	set_time(void)
141	{
142	struct timeval newtime = { .tv_sec = 0, .tv_usec = 0 };
143
144	if (gettimeofday(&newtime, NULL) == -1)
145	{
146	char buf[IRCD_BUFSIZE];
147
148	snprintf(buf, sizeof(buf), "Clock failure, TS can be corrupted: %s",
149	strerror(errno));
150	server_die(buf, false);
151	}
152
153	if ((uintmax_t)newtime.tv_sec < CurrentTime)
154	{
155	ilog(LOG_TYPE_IRCD, "System clock is running backwards - (%ju < %ju)",
156	(uintmax_t)newtime.tv_sec, CurrentTime);
157	sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
158	"System clock is running backwards - (%ju < %ju)",
159	(uintmax_t)newtime.tv_sec, CurrentTime);
160	event_set_back_events(CurrentTime - (uintmax_t)newtime.tv_sec);
161	}
162
163	SystemTime.tv_sec = newtime.tv_sec;
164	SystemTime.tv_usec = newtime.tv_usec;
165	}
166
167	static void
168	io_loop(void)
169	{
170	while (true)
171	{
172	if (listing_client_list.head)
173	{
174	dlink_node node = NULL, node_next = NULL;
175	DLINK_FOREACH_SAFE(node, node_next, listing_client_list.head)
176	safe_list_channels(node->data, false);
177	}
178
179	/* Run pending events */
180	event_run();
181
182	comm_select();
183	exit_aborted_clients();
184	free_exited_clients();
185
186	/* Check to see whether we have to rehash the configuration. */
187	if (dorehash == true)
188	{
189	conf_rehash(true);
190	dorehash = false;
191	}
192
193	if (doremotd == true)
194	{
195	motd_recache();
196	sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE,
197	"Got signal SIGUSR1, reloading motd file(s)");
198	doremotd = false;
199	}
200	}
201	}
202
203	/* initalialize_global_set_options()
204	*
205	* inputs - none
206	* output - none
207	* side effects - This sets all global set options needed
208	*/
209	static void
210	initialize_global_set_options(void)
211	{
212	GlobalSetOptions.maxclients = ConfigServerInfo.default_max_clients;
213	GlobalSetOptions.autoconn = true;
214	GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
215	GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
216	GlobalSetOptions.floodcount = ConfigGeneral.default_floodcount;
217	GlobalSetOptions.floodtime = ConfigGeneral.default_floodtime;
218	GlobalSetOptions.joinfloodcount = ConfigChannel.default_join_flood_count;
219	GlobalSetOptions.joinfloodtime = ConfigChannel.default_join_flood_time;
220	}
221
222	/* write_pidfile()
223	*
224	* inputs - filename+path of pid file
225	* output - NONE
226	* side effects - write the pid of the ircd to filename
227	*/
228	static void
229	write_pidfile(const char *filename)
230	{
231	FILE *fb;
232
233	if ((fb = fopen(filename, "w")))
234	{
235	char buf[IRCD_BUFSIZE];
236	unsigned int pid = (unsigned int)getpid();
237
238	snprintf(buf, sizeof(buf), "%u\n", pid);
239
240	if (fputs(buf, fb) == -1)
241	ilog(LOG_TYPE_IRCD, "Error writing to pid file %s: %s",
242	filename, strerror(errno));
243
244	fclose(fb);
245	}
246	else
247	ilog(LOG_TYPE_IRCD, "Error opening pid file %s: %s",
248	filename, strerror(errno));
249	}
250
251	/* check_pidfile()
252	*
253	* inputs - filename+path of pid file
254	* output - none
255	* side effects - reads pid from pidfile and checks if ircd is in process
256	* list. if it is, gracefully exits
257	* -kre
258	*/
259	static void
260	check_pidfile(const char *filename)
261	{
262	FILE *fb;
263	char buf[IRCD_BUFSIZE];
264
265	if ((fb = fopen(filename, "r")))
266	{
267	if (fgets(buf, 20, fb) == NULL)
268	ilog(LOG_TYPE_IRCD, "Error reading from pid file %s: %s",
269	filename, strerror(errno));
270	else
271	{
272	pid_t pid = atoi(buf);
273
274	if (kill(pid, 0) == 0)
275	{
276	/* log(L_ERROR, "Server is already running"); */
277	printf("ircd: daemon is already running\n");
278	exit(EXIT_FAILURE);
279	}
280	}
281
282	fclose(fb);
283	}
284	else if (errno != ENOENT)
285	ilog(LOG_TYPE_IRCD, "Error opening pid file %s: %s",
286	filename, strerror(errno));
287	}
288
289	/* setup_corefile()
290	*
291	* inputs - nothing
292	* output - nothing
293	* side effects - setups corefile to system limits.
294	* -kre
295	*/
296	static void
297	setup_corefile(void)
298	{
299	struct rlimit rlim; /* resource limits */
300
301	/* Set corefilesize to maximum */
302	if (getrlimit(RLIMIT_CORE, &rlim) == 0)
303	{
304	rlim.rlim_cur = rlim.rlim_max;
305	setrlimit(RLIMIT_CORE, &rlim);
306	}
307	}
308
309	static void
310	setup_fdlimit(void)
311	{
312	struct rlimit rlim; /* resource limits */
313
314	if (getrlimit(RLIMIT_NOFILE, &rlim))
315	{
316	fprintf(stderr, "getrlimit: couldn't get maximum number of file descriptors: %s\n",
317	strerror(errno));
318	exit(EXIT_FAILURE);
319	}
320
321	if (rlim.rlim_max > 0xFFFF)
322	rlim.rlim_max = 0xFFFF;
323	rlim.rlim_cur = rlim.rlim_max;
324
325	if (setrlimit(RLIMIT_NOFILE, &rlim) == 0)
326	hard_fdlimit = rlim.rlim_cur;
327	else
328	{
329	fprintf(stderr, "setrlimit: couldn't set maximum number of file descriptors: %s\n",
330	strerror(errno));
331	exit(EXIT_FAILURE);
332	}
333	}
334
335	/*
336	* print_startup - print startup information
337	*/
338	static void
339	print_startup(int pid)
340	{
341	printf("ircd: version %s(%s)\n", PATCHLEVEL, SERIALNUM);
342	printf("ircd: pid %d\n", pid);
343	printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
344	: "foreground", ConfigGeneral.dpath);
345	}
346
347	static void
348	make_daemon(void)
349	{
350	int pid;
351
352	if ((pid = fork()) < 0)
353	{
354	perror("fork");
355	exit(EXIT_FAILURE);
356	}
357	else if (pid > 0)
358	{
359	print_startup(pid);
360	exit(EXIT_SUCCESS);
361	}
362
363	setsid();
364	}
365
366	int
367	main(int argc, char *argv[])
368	{
369	/* Check to see if the user is running us as root, which is a nono */
370	if (geteuid() == 0)
371	{
372	fprintf(stderr, "ERROR: This server won't run as root/superuser\n");
373	return -1;
374	}
375
376	/* Setup corefile size immediately after boot -kre */
377	setup_corefile();
378
379	setup_fdlimit();
380
381	/* Save server boot time right away, so getrusage works correctly */
382	set_time();
383
384	/* It's not random, but it ought to be a little harder to guess */
385	init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec \| (getpid() << 20)));
386
387	ConfigGeneral.dpath = DPATH;
388	ConfigGeneral.spath = SPATH;
389	ConfigGeneral.mpath = MPATH;
390	ConfigGeneral.configfile = CPATH; /* Server configuration file */
391	ConfigGeneral.klinefile = KPATH; /* Server kline file */
392	ConfigGeneral.xlinefile = XPATH; /* Server xline file */
393	ConfigGeneral.dlinefile = DLPATH; /* dline file */
394	ConfigGeneral.resvfile = RESVPATH; /* resv file */
395
396	myargv = argv;
397	umask(077); /* umask 077: u=rwx,g=,o= */
398
399	parseargs(&argc, &argv, myopts);
400
401	if (printVersion == true)
402	{
403	printf("ircd: version %s(%s)\n", PATCHLEVEL, SERIALNUM);
404	exit(EXIT_SUCCESS);
405	}
406
407	if (chdir(ConfigGeneral.dpath))
408	{
409	perror("chdir");
410	exit(EXIT_FAILURE);
411	}
412
413	if (server_state.foreground == false)
414	{
415	make_daemon();
416	close_standard_fds(); /* this needs to be before comm_select_init()! */
417	}
418	else
419	print_startup(getpid());
420
421	setup_signals();
422
423	/* We need this to initialise the fd array before anything else */
424	fdlist_init();
425	log_set_file(LOG_TYPE_IRCD, 0, logFileName);
426
427	comm_select_init(); /* This needs to be setup early ! -- adrian */
428	tls_init();
429
430	/* Check if there is pidfile and daemon already running */
431	check_pidfile(pidFileName);
432
433	isupport_init();
434	hash_init();
435	ipcache_init();
436	client_init();
437	class_init();
438	resolver_init(); /* Needs to be setup before the io loop */
439	modules_init();
440	read_conf_files(true); /* cold start init conf files */
441	capab_init(); /* Set up default_server_capabs */
442	initialize_global_set_options(); /* Has to be called after read_conf_files() */
443	channel_mode_init();
444	read_links_file();
445	motd_init();
446	user_modes_init();
447
448	if (EmptyString(ConfigServerInfo.name))
449	{
450	ilog(LOG_TYPE_IRCD, "ERROR: No server name specified in serverinfo block.");
451	exit(EXIT_FAILURE);
452	}
453
454	strlcpy(me.name, ConfigServerInfo.name, sizeof(me.name));
455
456	/* serverinfo {} description must exist. If not, error out.*/
457	if (EmptyString(ConfigServerInfo.description))
458	{
459	ilog(LOG_TYPE_IRCD, "ERROR: No server description specified in serverinfo block.");
460	exit(EXIT_FAILURE);
461	}
462
463	strlcpy(me.info, ConfigServerInfo.description, sizeof(me.info));
464
465	if (EmptyString(ConfigServerInfo.sid))
466	{
467	ilog(LOG_TYPE_IRCD, "Generating server ID");
468	generate_sid();
469	}
470	else
471	strlcpy(me.id, ConfigServerInfo.sid, sizeof(me.id));
472
473	init_uid();
474
475	me.from = &me;
476	me.servptr = &me;
477	me.connection->lasttime = CurrentTime;
478	me.connection->since = CurrentTime;
479	me.connection->firsttime = CurrentTime;
480
481	SetMe(&me);
482	server_make(&me);
483
484	hash_add_id(&me);
485	hash_add_client(&me);
486
487	dlinkAdd(&me, &me.node, &global_server_list);
488
489	load_kline_database(ConfigGeneral.klinefile);
490	load_dline_database(ConfigGeneral.dlinefile);
491	load_xline_database(ConfigGeneral.xlinefile);
492	load_resv_database(ConfigGeneral.resvfile);
493
494	load_all_modules(true);
495	load_conf_modules();
496	load_core_modules(true);
497
498	write_pidfile(pidFileName);
499
500	event_addish(&event_cleanup_tklines, NULL);
501
502	/* We want try_connections to be called as soon as possible now! -- adrian */
503	/* No, 'cause after a restart it would cause all sorts of nick collides */
504	event_addish(&event_try_connections, NULL);
505
506	/* Setup the timeout check. I'll shift it later :) -- adrian */
507	event_add(&event_comm_checktimeouts, NULL);
508
509	event_addish(&event_save_all_databases, NULL);
510
511	if (ConfigServerHide.flatten_links_delay && event_write_links_file.active == false)
512	{
513	event_write_links_file.when = ConfigServerHide.flatten_links_delay;
514	event_add(&event_write_links_file, NULL);
515	}
516
517	ilog(LOG_TYPE_IRCD, "Server ready. Running version: %s(%s)", PATCHLEVEL, SERIALNUM);
518	io_loop();
519
520	return 0;
521	}
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