trunk/src/ircd.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 1997-2016 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 "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 "auth.h"
#include "s_bsd.h"
#include "log.h"
#include "server.h"
#include "send.h"
#include "whowas.h"
#include "modules.h"
#include "memory.h"
#include "mempool.h"
#include "ircd_getopt.h"
#include "watch.h"
#include "conf_db.h"
#include "conf_class.h"
#include "ipcache.h"
#include "isupport.h"
#include "userhost.h"


#ifdef HAVE_LIBGEOIP
GeoIP *GeoIPv4_ctx;
GeoIP *GeoIPv6_ctx;
#endif

struct SetOptions GlobalSetOptions;  /* /quote set variables */
struct Counter Count;
struct ServerState_t server_state;
struct ServerStatistics ServerStats;
struct timeval 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;

unsigned int dorehash;
unsigned int doremotd;

static int 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,
   YESNO, "Run in foreground (don't detach)" },
  { "version",    &printVersion,
   YESNO, "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, SERVER_SHUTDOWN);
  }

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

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

static void
io_loop(void)
{
  while (1)
  {
    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, 0);
    }

    /* 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)
    {
      conf_rehash(1);
      dorehash = 0;
    }

    if (doremotd)
    {
      motd_recache();
      sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE,
                           "Got signal SIGUSR1, reloading motd file(s)");
      doremotd = 0;
    }
  }
}

/* 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 = 1;
  GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
  GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
  GlobalSetOptions.floodcount = ConfigGeneral.default_floodcount;
  GlobalSetOptions.joinfloodcount = ConfigChannel.default_join_flood_count;
  GlobalSetOptions.joinfloodtime = ConfigChannel.default_join_flood_time;
  GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
}

/* initialize_server_capabs()
 *
 * inputs       - none
 * output       - none
 */
static void
initialize_server_capabs(void)
{
  add_capability("QS", CAPAB_QS);
  add_capability("EOB", CAPAB_EOB);
  add_capability("CLUSTER", CAPAB_CLUSTER);
  add_capability("SVS", CAPAB_SVS);
  add_capability("CHW", CAPAB_CHW);
  add_capability("HOPS", CAPAB_HOPS);
}

/* 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))
      ilog(LOG_TYPE_IRCD, "Error reading from pid file %s: %s",
           filename, strerror(errno));
    else
    {
      pid_t pid = atoi(buf);

      if (!kill(pid, 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)
{
#ifdef HAVE_SYS_RESOURCE_H
  struct rlimit rlim; /* resource limits */

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

/*
 * print_startup - print startup information
 */
static void
print_startup(int pid)
{
  printf("ircd: version %s(%s)\n", ircd_version, serno);
  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())
  {
    fprintf(stderr, "ERROR: This server won't run as root/superuser\n");
    return -1;
  }

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

  /* 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)
  {
    printf("ircd: version %s(%s)\n", ircd_version, serno);
    exit(EXIT_SUCCESS);
  }

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

  if (!server_state.foreground)
  {
    make_daemon();
    //https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=768841 says close_standard_fds should be ok
    //since we are initing gnutls explicitly on the other side, but it doesn't work for me
    //close_standard_fds(); /* this needs to be before init_netio()! */
  }
  else
    print_startup(getpid());

  tls_init();
  setup_signals();

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

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

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

  mp_pool_init();
  init_dlink_nodes();
  isupport_init();
  dbuf_init();
  hash_init();
  userhost_init();
  ipcache_init();
  client_init();
  class_init();
  whowas_init();
  watch_init();
  auth_init();          /* Initialise the auth code */
  init_resolver();      /* Needs to be setup before the io loop */
  modules_init();
  read_conf_files(1);   /* cold start init conf files */
  initialize_server_capabs();   /* Set up default_server_capabs */
  initialize_global_set_options();  /* Has to be called after read_conf_files() */
  channel_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);
  make_server(&me);

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

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

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

  load_all_modules(1);
  load_conf_modules();
  load_core_modules(1);

  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 == 0)
  {
    event_write_links_file.when = ConfigServerHide.flatten_links_delay;
    event_add(&event_write_links_file, NULL);
  }

  ilog(LOG_TYPE_IRCD, "Server Ready");
  io_loop();

  return 0;
}
Revision:	7258
Committed:	Sat Feb 6 17:29:57 2016 UTC (9 years, 6 months ago) by michael
Content type:	text/x-csrc
File size:	13375 byte(s)
Log Message:	- Improve libGeoIP support
#	Content
1	/*
2	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	*
4	* Copyright (c) 1997-2016 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 "client.h"
33	#include "event.h"
34	#include "fdlist.h"
35	#include "hash.h"
36	#include "id.h"
37	#include "irc_string.h"
38	#include "ircd_signal.h"
39	#include "motd.h"
40	#include "conf.h"
41	#include "hostmask.h"
42	#include "parse.h"
43	#include "res.h"
44	#include "restart.h"
45	#include "rng_mt.h"
46	#include "auth.h"
47	#include "s_bsd.h"
48	#include "log.h"
49	#include "server.h"
50	#include "send.h"
51	#include "whowas.h"
52	#include "modules.h"
53	#include "memory.h"
54	#include "mempool.h"
55	#include "ircd_getopt.h"
56	#include "watch.h"
57	#include "conf_db.h"
58	#include "conf_class.h"
59	#include "ipcache.h"
60	#include "isupport.h"
61	#include "userhost.h"
62
63
64	#ifdef HAVE_LIBGEOIP
65	GeoIP *GeoIPv4_ctx;
66	GeoIP *GeoIPv6_ctx;
67	#endif
68
69	struct SetOptions GlobalSetOptions; /* /quote set variables */
70	struct Counter Count;
71	struct ServerState_t server_state;
72	struct ServerStatistics ServerStats;
73	struct timeval SystemTime;
74	struct Connection meConnection; /* That's also part of me */
75	struct Client me = { .connection = &meConnection }; /* That's me */
76
77	char **myargv;
78	const char *logFileName = LPATH;
79	const char *pidFileName = PPATH;
80
81	unsigned int dorehash;
82	unsigned int doremotd;
83
84	static int printVersion;
85
86	static struct lgetopt myopts[] =
87	{
88	{ "configfile", &ConfigGeneral.configfile,
89	STRING, "File to use for ircd.conf" },
90	{ "klinefile", &ConfigGeneral.klinefile,
91	STRING, "File to use for kline database" },
92	{ "dlinefile", &ConfigGeneral.dlinefile,
93	STRING, "File to use for dline database" },
94	{ "xlinefile", &ConfigGeneral.xlinefile,
95	STRING, "File to use for xline database" },
96	{ "resvfile", &ConfigGeneral.resvfile,
97	STRING, "File to use for resv database" },
98	{ "logfile", &logFileName,
99	STRING, "File to use for ircd.log" },
100	{ "pidfile", &pidFileName,
101	STRING, "File to use for process ID" },
102	{ "foreground", &server_state.foreground,
103	YESNO, "Run in foreground (don't detach)" },
104	{ "version", &printVersion,
105	YESNO, "Print version and exit" },
106	{ "help", NULL, USAGE, "Print this text" },
107	{ NULL, NULL, STRING, NULL },
108	};
109
110	static struct event event_cleanup_tklines =
111	{
112	.name = "cleanup_tklines",
113	.handler = cleanup_tklines,
114	.when = CLEANUP_TKLINES_TIME
115	};
116
117	static struct event event_try_connections =
118	{
119	.name = "try_connections",
120	.handler = try_connections,
121	.when = STARTUP_CONNECTIONS_TIME
122	};
123
124	static struct event event_comm_checktimeouts =
125	{
126	.name = "comm_checktimeouts",
127	.handler = comm_checktimeouts,
128	.when = 1
129	};
130
131	static struct event event_save_all_databases =
132	{
133	.name = "save_all_databases",
134	.handler = save_all_databases,
135	.when = DATABASE_UPDATE_TIMEOUT
136	};
137
138	struct event event_write_links_file =
139	{
140	.name = "write_links_file",
141	.handler = write_links_file,
142	};
143
144
145	void
146	set_time(void)
147	{
148	struct timeval newtime = { .tv_sec = 0, .tv_usec = 0 };
149
150	if (gettimeofday(&newtime, NULL) == -1)
151	{
152	char buf[IRCD_BUFSIZE];
153
154	snprintf(buf, sizeof(buf), "Clock failure, TS can be corrupted: %s",
155	strerror(errno));
156	server_die(buf, SERVER_SHUTDOWN);
157	}
158
159	if (newtime.tv_sec < CurrentTime)
160	{
161	ilog(LOG_TYPE_IRCD, "System clock is running backwards - (%ju < %ju)",
162	newtime.tv_sec, CurrentTime);
163	sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
164	"System clock is running backwards - (%ju < %ju)",
165	newtime.tv_sec, CurrentTime);
166	event_set_back_events(CurrentTime - newtime.tv_sec);
167	}
168
169	SystemTime.tv_sec = newtime.tv_sec;
170	SystemTime.tv_usec = newtime.tv_usec;
171	}
172
173	static void
174	io_loop(void)
175	{
176	while (1)
177	{
178	if (listing_client_list.head)
179	{
180	dlink_node node = NULL, node_next = NULL;
181	DLINK_FOREACH_SAFE(node, node_next, listing_client_list.head)
182	safe_list_channels(node->data, 0);
183	}
184
185	/* Run pending events */
186	event_run();
187
188	comm_select();
189	exit_aborted_clients();
190	free_exited_clients();
191
192	/* Check to see whether we have to rehash the configuration. */
193	if (dorehash)
194	{
195	conf_rehash(1);
196	dorehash = 0;
197	}
198
199	if (doremotd)
200	{
201	motd_recache();
202	sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE,
203	"Got signal SIGUSR1, reloading motd file(s)");
204	doremotd = 0;
205	}
206	}
207	}
208
209	/* initalialize_global_set_options()
210	*
211	* inputs - none
212	* output - none
213	* side effects - This sets all global set options needed
214	*/
215	static void
216	initialize_global_set_options(void)
217	{
218	GlobalSetOptions.maxclients = ConfigServerInfo.default_max_clients;
219	GlobalSetOptions.autoconn = 1;
220	GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
221	GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
222	GlobalSetOptions.floodcount = ConfigGeneral.default_floodcount;
223	GlobalSetOptions.joinfloodcount = ConfigChannel.default_join_flood_count;
224	GlobalSetOptions.joinfloodtime = ConfigChannel.default_join_flood_time;
225	GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
226	}
227
228	/* initialize_server_capabs()
229	*
230	* inputs - none
231	* output - none
232	*/
233	static void
234	initialize_server_capabs(void)
235	{
236	add_capability("QS", CAPAB_QS);
237	add_capability("EOB", CAPAB_EOB);
238	add_capability("CLUSTER", CAPAB_CLUSTER);
239	add_capability("SVS", CAPAB_SVS);
240	add_capability("CHW", CAPAB_CHW);
241	add_capability("HOPS", CAPAB_HOPS);
242	}
243
244	/* write_pidfile()
245	*
246	* inputs - filename+path of pid file
247	* output - NONE
248	* side effects - write the pid of the ircd to filename
249	*/
250	static void
251	write_pidfile(const char *filename)
252	{
253	FILE *fb;
254
255	if ((fb = fopen(filename, "w")))
256	{
257	char buf[IRCD_BUFSIZE];
258	unsigned int pid = (unsigned int)getpid();
259
260	snprintf(buf, sizeof(buf), "%u\n", pid);
261
262	if (fputs(buf, fb) == -1)
263	ilog(LOG_TYPE_IRCD, "Error writing to pid file %s: %s",
264	filename, strerror(errno));
265
266	fclose(fb);
267	}
268	else
269	ilog(LOG_TYPE_IRCD, "Error opening pid file %s: %s",
270	filename, strerror(errno));
271	}
272
273	/* check_pidfile()
274	*
275	* inputs - filename+path of pid file
276	* output - none
277	* side effects - reads pid from pidfile and checks if ircd is in process
278	* list. if it is, gracefully exits
279	* -kre
280	*/
281	static void
282	check_pidfile(const char *filename)
283	{
284	FILE *fb;
285	char buf[IRCD_BUFSIZE];
286
287	if ((fb = fopen(filename, "r")))
288	{
289	if (!fgets(buf, 20, fb))
290	ilog(LOG_TYPE_IRCD, "Error reading from pid file %s: %s",
291	filename, strerror(errno));
292	else
293	{
294	pid_t pid = atoi(buf);
295
296	if (!kill(pid, 0))
297	{
298	/* log(L_ERROR, "Server is already running"); */
299	printf("ircd: daemon is already running\n");
300	exit(EXIT_FAILURE);
301	}
302	}
303
304	fclose(fb);
305	}
306	else if (errno != ENOENT)
307	ilog(LOG_TYPE_IRCD, "Error opening pid file %s: %s",
308	filename, strerror(errno));
309	}
310
311	/* setup_corefile()
312	*
313	* inputs - nothing
314	* output - nothing
315	* side effects - setups corefile to system limits.
316	* -kre
317	*/
318	static void
319	setup_corefile(void)
320	{
321	#ifdef HAVE_SYS_RESOURCE_H
322	struct rlimit rlim; /* resource limits */
323
324	/* Set corefilesize to maximum */
325	if (!getrlimit(RLIMIT_CORE, &rlim))
326	{
327	rlim.rlim_cur = rlim.rlim_max;
328	setrlimit(RLIMIT_CORE, &rlim);
329	}
330	#endif
331	}
332
333	/*
334	* print_startup - print startup information
335	*/
336	static void
337	print_startup(int pid)
338	{
339	printf("ircd: version %s(%s)\n", ircd_version, serno);
340	printf("ircd: pid %d\n", pid);
341	printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
342	: "foreground", ConfigGeneral.dpath);
343	}
344
345	static void
346	make_daemon(void)
347	{
348	int pid;
349
350	if ((pid = fork()) < 0)
351	{
352	perror("fork");
353	exit(EXIT_FAILURE);
354	}
355	else if (pid > 0)
356	{
357	print_startup(pid);
358	exit(EXIT_SUCCESS);
359	}
360
361	setsid();
362	}
363
364	int
365	main(int argc, char *argv[])
366	{
367	/* Check to see if the user is running us as root, which is a nono */
368	if (!geteuid())
369	{
370	fprintf(stderr, "ERROR: This server won't run as root/superuser\n");
371	return -1;
372	}
373
374	/* Setup corefile size immediately after boot -kre */
375	setup_corefile();
376
377	/* Save server boot time right away, so getrusage works correctly */
378	set_time();
379
380	/* It's not random, but it ought to be a little harder to guess */
381	init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec \| (getpid() << 20)));
382
383	ConfigGeneral.dpath = DPATH;
384	ConfigGeneral.spath = SPATH;
385	ConfigGeneral.mpath = MPATH;
386	ConfigGeneral.configfile = CPATH; /* Server configuration file */
387	ConfigGeneral.klinefile = KPATH; /* Server kline file */
388	ConfigGeneral.xlinefile = XPATH; /* Server xline file */
389	ConfigGeneral.dlinefile = DLPATH; /* dline file */
390	ConfigGeneral.resvfile = RESVPATH; /* resv file */
391
392	myargv = argv;
393	umask(077); /* umask 077: u=rwx,g=,o= */
394
395	parseargs(&argc, &argv, myopts);
396
397	if (printVersion)
398	{
399	printf("ircd: version %s(%s)\n", ircd_version, serno);
400	exit(EXIT_SUCCESS);
401	}
402
403	if (chdir(ConfigGeneral.dpath))
404	{
405	perror("chdir");
406	exit(EXIT_FAILURE);
407	}
408
409	if (!server_state.foreground)
410	{
411	make_daemon();
412	//https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=768841 says close_standard_fds should be ok
413	//since we are initing gnutls explicitly on the other side, but it doesn't work for me
414	//close_standard_fds(); /* this needs to be before init_netio()! */
415	}
416	else
417	print_startup(getpid());
418
419	tls_init();
420	setup_signals();
421
422	/* We need this to initialise the fd array before anything else */
423	fdlist_init();
424	log_set_file(LOG_TYPE_IRCD, 0, logFileName);
425
426	init_netio(); /* This needs to be setup early ! -- adrian */
427
428	/* Check if there is pidfile and daemon already running */
429	check_pidfile(pidFileName);
430
431	mp_pool_init();
432	init_dlink_nodes();
433	isupport_init();
434	dbuf_init();
435	hash_init();
436	userhost_init();
437	ipcache_init();
438	client_init();
439	class_init();
440	whowas_init();
441	watch_init();
442	auth_init(); /* Initialise the auth code */
443	init_resolver(); /* Needs to be setup before the io loop */
444	modules_init();
445	read_conf_files(1); /* cold start init conf files */
446	initialize_server_capabs(); /* Set up default_server_capabs */
447	initialize_global_set_options(); /* Has to be called after read_conf_files() */
448	channel_init();
449	read_links_file();
450	motd_init();
451	user_modes_init();
452
453	if (EmptyString(ConfigServerInfo.name))
454	{
455	ilog(LOG_TYPE_IRCD, "ERROR: No server name specified in serverinfo block.");
456	exit(EXIT_FAILURE);
457	}
458
459	strlcpy(me.name, ConfigServerInfo.name, sizeof(me.name));
460
461	/* serverinfo {} description must exist. If not, error out.*/
462	if (EmptyString(ConfigServerInfo.description))
463	{
464	ilog(LOG_TYPE_IRCD, "ERROR: No server description specified in serverinfo block.");
465	exit(EXIT_FAILURE);
466	}
467
468	strlcpy(me.info, ConfigServerInfo.description, sizeof(me.info));
469
470	if (EmptyString(ConfigServerInfo.sid))
471	{
472	ilog(LOG_TYPE_IRCD, "Generating server ID");
473	generate_sid();
474	}
475	else
476	strlcpy(me.id, ConfigServerInfo.sid, sizeof(me.id));
477
478	init_uid();
479
480	me.from = &me;
481	me.servptr = &me;
482	me.connection->lasttime = CurrentTime;
483	me.connection->since = CurrentTime;
484	me.connection->firsttime = CurrentTime;
485
486	SetMe(&me);
487	make_server(&me);
488
489	hash_add_id(&me);
490	hash_add_client(&me);
491
492	dlinkAdd(&me, make_dlink_node(), &global_server_list);
493	dlinkAdd(&me, &me.node, &global_client_list);
494
495	load_kline_database(ConfigGeneral.klinefile);
496	load_dline_database(ConfigGeneral.dlinefile);
497	load_xline_database(ConfigGeneral.xlinefile);
498	load_resv_database(ConfigGeneral.resvfile);
499
500	load_all_modules(1);
501	load_conf_modules();
502	load_core_modules(1);
503
504	write_pidfile(pidFileName);
505
506	event_addish(&event_cleanup_tklines, NULL);
507
508	/* We want try_connections to be called as soon as possible now! -- adrian */
509	/* No, 'cause after a restart it would cause all sorts of nick collides */
510	event_addish(&event_try_connections, NULL);
511
512	/* Setup the timeout check. I'll shift it later :) -- adrian */
513	event_add(&event_comm_checktimeouts, NULL);
514
515	event_addish(&event_save_all_databases, NULL);
516
517	if (ConfigServerHide.flatten_links_delay && event_write_links_file.active == 0)
518	{
519	event_write_links_file.when = ConfigServerHide.flatten_links_delay;
520	event_add(&event_write_links_file, NULL);
521	}
522
523	ilog(LOG_TYPE_IRCD, "Server Ready");
524	io_loop();
525
526	return 0;
527	}