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 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;

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 ((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 (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;
}

/* 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();
    close_standard_fds(); /* this needs to be before netio_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);

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

  /* 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 */
  resolver_init();      /* Needs to be setup before the io loop */
  modules_init();
  read_conf_files(1);   /* cold start init conf files */
  server_capab_init();  /* 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:	7573
Committed:	Tue May 24 16:34:18 2016 UTC (9 years, 3 months ago) by michael
Content type:	text/x-csrc
File size:	12866 byte(s)
Log Message:	- Move initialize_server_capabs() from ircd.c to server.c and rename it to server_capab_init()
#	User	Rev	Content
1	adx	30	/*
2	michael	2916	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	adx	30	*
4	michael	7006	* Copyright (c) 1997-2016 ircd-hybrid development team
5	adx	30	*
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	michael	4565	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
19	adx	30	* USA
20			*/
21
22	michael	2916	/*! \file ircd.c
23			* \brief Starts up and runs the ircd.
24			* \version $Id$
25			*/
26
27	adx	30	#include "stdinc.h"
28	michael	3347	#include "user.h"
29	michael	1011	#include "list.h"
30	adx	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	michael	6161	#include "id.h"
37	adx	30	#include "irc_string.h"
38			#include "ircd_signal.h"
39			#include "motd.h"
40	michael	1632	#include "conf.h"
41	adx	30	#include "hostmask.h"
42			#include "parse.h"
43	michael	3322	#include "res.h"
44	adx	30	#include "restart.h"
45	michael	982	#include "rng_mt.h"
46	michael	3324	#include "auth.h"
47	adx	30	#include "s_bsd.h"
48	michael	1309	#include "log.h"
49	michael	6481	#include "server.h"
50	adx	30	#include "send.h"
51			#include "whowas.h"
52			#include "modules.h"
53			#include "memory.h"
54	michael	1654	#include "mempool.h"
55	adx	30	#include "ircd_getopt.h"
56	michael	876	#include "watch.h"
57	michael	1622	#include "conf_db.h"
58	michael	1632	#include "conf_class.h"
59	michael	4325	#include "ipcache.h"
60	michael	6185	#include "isupport.h"
61	michael	6393	#include "userhost.h"
62	adx	30
63	michael	1858
64			#ifdef HAVE_LIBGEOIP
65	michael	7258	GeoIP *GeoIPv4_ctx;
66			GeoIP *GeoIPv6_ctx;
67	michael	1858	#endif
68	michael	2872
69	michael	5737	struct SetOptions GlobalSetOptions; /* /quote set variables */
70	michael	5602	struct Counter Count;
71			struct ServerState_t server_state;
72			struct ServerStatistics ServerStats;
73	michael	7330	struct ServerTime SystemTime;
74	michael	5737	struct Connection meConnection; /* That's also part of me */
75	michael	5470	struct Client me = { .connection = &meConnection }; /* That's me */
76	adx	30
77	michael	5460	char **myargv;
78	adx	30	const char *logFileName = LPATH;
79			const char *pidFileName = PPATH;
80
81	michael	5460	unsigned int dorehash;
82			unsigned int doremotd;
83	adx	30
84	michael	6735	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	michael	4094	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	adx	30	void
146			set_time(void)
147			{
148	michael	2978	struct timeval newtime = { .tv_sec = 0, .tv_usec = 0 };
149	adx	30
150			if (gettimeofday(&newtime, NULL) == -1)
151			{
152	michael	6482	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	adx	30	}
158
159	michael	7330	if ((uintmax_t)newtime.tv_sec < CurrentTime)
160	adx	30	{
161	michael	6782	ilog(LOG_TYPE_IRCD, "System clock is running backwards - (%ju < %ju)",
162	michael	7330	(uintmax_t)newtime.tv_sec, CurrentTime);
163	michael	2980	sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
164	michael	6782	"System clock is running backwards - (%ju < %ju)",
165	michael	7330	(uintmax_t)newtime.tv_sec, CurrentTime);
166			event_set_back_events(CurrentTime - (uintmax_t)newtime.tv_sec);
167	adx	30	}
168
169	michael	6481	SystemTime.tv_sec = newtime.tv_sec;
170	adx	30	SystemTime.tv_usec = newtime.tv_usec;
171			}
172
173			static void
174			io_loop(void)
175			{
176	michael	3215	while (1)
177	adx	30	{
178			if (listing_client_list.head)
179			{
180	michael	4815	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	adx	30	}
184
185	michael	4094	/* Run pending events */
186			event_run();
187	adx	30
188			comm_select();
189			exit_aborted_clients();
190			free_exited_clients();
191
192	michael	6735	/* Check to see whether we have to rehash the configuration. */
193	adx	30	if (dorehash)
194			{
195	michael	4982	conf_rehash(1);
196	adx	30	dorehash = 0;
197			}
198	michael	3215
199	adx	30	if (doremotd)
200			{
201	michael	2150	motd_recache();
202	michael	6318	sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE,
203	michael	3065	"Got signal SIGUSR1, reloading motd file(s)");
204	adx	30	doremotd = 0;
205			}
206			}
207			}
208
209			/* initalialize_global_set_options()
210			*
211			* inputs - none
212			* output - none
213	michael	2916	* side effects - This sets all global set options needed
214	adx	30	*/
215			static void
216			initialize_global_set_options(void)
217			{
218	michael	5489	GlobalSetOptions.maxclients = ConfigServerInfo.default_max_clients;
219	michael	5499	GlobalSetOptions.autoconn = 1;
220	adx	30	GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
221	michael	5499	GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
222			GlobalSetOptions.floodcount = ConfigGeneral.default_floodcount;
223	michael	5489	GlobalSetOptions.joinfloodcount = ConfigChannel.default_join_flood_count;
224			GlobalSetOptions.joinfloodtime = ConfigChannel.default_join_flood_time;
225	adx	30	GlobalSetOptions.ident_timeout = IDENT_TIMEOUT;
226			}
227
228			/* write_pidfile()
229			*
230			* inputs - filename+path of pid file
231			* output - NONE
232			* side effects - write the pid of the ircd to filename
233			*/
234			static void
235			write_pidfile(const char *filename)
236			{
237	michael	1325	FILE *fb;
238	adx	30
239	michael	1325	if ((fb = fopen(filename, "w")))
240	adx	30	{
241	michael	6470	char buf[IRCD_BUFSIZE];
242	adx	30	unsigned int pid = (unsigned int)getpid();
243
244	michael	6470	snprintf(buf, sizeof(buf), "%u\n", pid);
245	michael	1325
246	michael	6470	if (fputs(buf, fb) == -1)
247	michael	5737	ilog(LOG_TYPE_IRCD, "Error writing to pid file %s: %s",
248			filename, strerror(errno));
249	adx	30
250	michael	1325	fclose(fb);
251	adx	30	}
252			else
253	michael	5566	ilog(LOG_TYPE_IRCD, "Error opening pid file %s: %s",
254	michael	4748	filename, strerror(errno));
255	adx	30	}
256
257			/* check_pidfile()
258			*
259			* inputs - filename+path of pid file
260			* output - none
261			* side effects - reads pid from pidfile and checks if ircd is in process
262			* list. if it is, gracefully exits
263			* -kre
264			*/
265			static void
266			check_pidfile(const char *filename)
267			{
268	michael	1325	FILE *fb;
269	michael	6470	char buf[IRCD_BUFSIZE];
270	adx	30
271	michael	1325	if ((fb = fopen(filename, "r")))
272	adx	30	{
273	michael	6470	if (!fgets(buf, 20, fb))
274	michael	6260	ilog(LOG_TYPE_IRCD, "Error reading from pid file %s: %s",
275			filename, strerror(errno));
276	adx	30	else
277			{
278	michael	6481	pid_t pid = atoi(buf);
279	adx	30
280	michael	6481	if (!kill(pid, 0))
281	adx	30	{
282			/* log(L_ERROR, "Server is already running"); */
283			printf("ircd: daemon is already running\n");
284	michael	6646	exit(EXIT_FAILURE);
285	adx	30	}
286			}
287
288	michael	1325	fclose(fb);
289	adx	30	}
290			else if (errno != ENOENT)
291	michael	6260	ilog(LOG_TYPE_IRCD, "Error opening pid file %s: %s",
292			filename, strerror(errno));
293	adx	30	}
294
295			/* setup_corefile()
296			*
297			* inputs - nothing
298			* output - nothing
299			* side effects - setups corefile to system limits.
300			* -kre
301			*/
302			static void
303			setup_corefile(void)
304			{
305			#ifdef HAVE_SYS_RESOURCE_H
306			struct rlimit rlim; /* resource limits */
307
308			/* Set corefilesize to maximum */
309			if (!getrlimit(RLIMIT_CORE, &rlim))
310			{
311			rlim.rlim_cur = rlim.rlim_max;
312			setrlimit(RLIMIT_CORE, &rlim);
313			}
314			#endif
315			}
316
317	michael	6735	/*
318			* print_startup - print startup information
319			*/
320			static void
321			print_startup(int pid)
322			{
323			printf("ircd: version %s(%s)\n", ircd_version, serno);
324			printf("ircd: pid %d\n", pid);
325			printf("ircd: running in %s mode from %s\n", !server_state.foreground ? "background"
326			: "foreground", ConfigGeneral.dpath);
327			}
328
329			static void
330			make_daemon(void)
331			{
332			int pid;
333
334			if ((pid = fork()) < 0)
335			{
336			perror("fork");
337			exit(EXIT_FAILURE);
338			}
339			else if (pid > 0)
340			{
341			print_startup(pid);
342			exit(EXIT_SUCCESS);
343			}
344
345			setsid();
346			}
347
348	adx	30	int
349			main(int argc, char *argv[])
350			{
351	michael	2253	/* Check to see if the user is running us as root, which is a nono */
352	michael	4733	if (!geteuid())
353	adx	30	{
354	michael	3525	fprintf(stderr, "ERROR: This server won't run as root/superuser\n");
355	michael	982	return -1;
356	adx	30	}
357
358			/* Setup corefile size immediately after boot -kre */
359			setup_corefile();
360
361	michael	5545	/* Save server boot time right away, so getrusage works correctly */
362	adx	30	set_time();
363
364	michael	5545	/* It's not random, but it ought to be a little harder to guess */
365	michael	982	init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_usec \| (getpid() << 20)));
366
367	michael	4340	ConfigGeneral.dpath = DPATH;
368			ConfigGeneral.spath = SPATH;
369			ConfigGeneral.mpath = MPATH;
370			ConfigGeneral.configfile = CPATH; /* Server configuration file */
371			ConfigGeneral.klinefile = KPATH; /* Server kline file */
372			ConfigGeneral.xlinefile = XPATH; /* Server xline file */
373			ConfigGeneral.dlinefile = DLPATH; /* dline file */
374			ConfigGeneral.resvfile = RESVPATH; /* resv file */
375	michael	1702
376	adx	30	myargv = argv;
377	michael	5723	umask(077); /* umask 077: u=rwx,g=,o= */
378	adx	30
379			parseargs(&argc, &argv, myopts);
380
381			if (printVersion)
382			{
383	michael	2646	printf("ircd: version %s(%s)\n", ircd_version, serno);
384	adx	30	exit(EXIT_SUCCESS);
385			}
386
387	michael	4340	if (chdir(ConfigGeneral.dpath))
388	adx	30	{
389			perror("chdir");
390			exit(EXIT_FAILURE);
391			}
392
393			if (!server_state.foreground)
394			{
395			make_daemon();
396	michael	7566	close_standard_fds(); /* this needs to be before netio_init()! */
397	adx	30	}
398			else
399			print_startup(getpid());
400
401			setup_signals();
402
403			/* We need this to initialise the fd array before anything else */
404			fdlist_init();
405	michael	1831	log_set_file(LOG_TYPE_IRCD, 0, logFileName);
406	michael	4415
407	michael	7566	netio_init(); /* This needs to be setup early ! -- adrian */
408	michael	7279	tls_init();
409	michael	2253
410	adx	30	/* Check if there is pidfile and daemon already running */
411			check_pidfile(pidFileName);
412
413	michael	1654	mp_pool_init();
414	adx	30	init_dlink_nodes();
415	michael	6185	isupport_init();
416	adx	30	dbuf_init();
417	michael	1798	hash_init();
418	michael	6393	userhost_init();
419	michael	4319	ipcache_init();
420	michael	1798	client_init();
421	michael	1632	class_init();
422	michael	7438	whowas_init();
423	michael	876	watch_init();
424	michael	1798	auth_init(); /* Initialise the auth code */
425	michael	7569	resolver_init(); /* Needs to be setup before the io loop */
426	michael	1404	modules_init();
427	adx	30	read_conf_files(1); /* cold start init conf files */
428	michael	7573	server_capab_init(); /* Set up default_server_capabs */
429	michael	5489	initialize_global_set_options(); /* Has to be called after read_conf_files() */
430	michael	1798	channel_init();
431	michael	2216	read_links_file();
432	michael	2150	motd_init();
433	michael	6189	user_modes_init();
434	adx	30
435	michael	4340	if (EmptyString(ConfigServerInfo.name))
436	michael	1115	{
437	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server name specified in serverinfo block.");
438	michael	1115	exit(EXIT_FAILURE);
439			}
440
441	michael	4340	strlcpy(me.name, ConfigServerInfo.name, sizeof(me.name));
442	adx	30
443	michael	6481	/* serverinfo {} description must exist. If not, error out.*/
444	michael	4340	if (EmptyString(ConfigServerInfo.description))
445	adx	30	{
446	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server description specified in serverinfo block.");
447	adx	30	exit(EXIT_FAILURE);
448			}
449	michael	885
450	michael	4340	strlcpy(me.info, ConfigServerInfo.description, sizeof(me.info));
451	adx	30
452	michael	6156	if (EmptyString(ConfigServerInfo.sid))
453			{
454			ilog(LOG_TYPE_IRCD, "Generating server ID");
455			generate_sid();
456			}
457			else
458			strlcpy(me.id, ConfigServerInfo.sid, sizeof(me.id));
459
460	michael	6464	init_uid();
461
462	michael	5545	me.from = &me;
463			me.servptr = &me;
464			me.connection->lasttime = CurrentTime;
465			me.connection->since = CurrentTime;
466	michael	4588	me.connection->firsttime = CurrentTime;
467	adx	30
468			SetMe(&me);
469			make_server(&me);
470
471	michael	1115	hash_add_id(&me);
472	adx	30	hash_add_client(&me);
473	michael	2916
474	michael	4209	dlinkAdd(&me, make_dlink_node(), &global_server_list);
475	michael	6464	dlinkAdd(&me, &me.node, &global_client_list);
476	adx	30
477	michael	6928	load_kline_database(ConfigGeneral.klinefile);
478			load_dline_database(ConfigGeneral.dlinefile);
479			load_xline_database(ConfigGeneral.xlinefile);
480			load_resv_database(ConfigGeneral.resvfile);
481	michael	1622
482	adx	30	load_all_modules(1);
483			load_conf_modules();
484			load_core_modules(1);
485	michael	1115
486	adx	30	write_pidfile(pidFileName);
487
488	michael	4094	event_addish(&event_cleanup_tklines, NULL);
489	adx	30
490			/* We want try_connections to be called as soon as possible now! -- adrian */
491			/* No, 'cause after a restart it would cause all sorts of nick collides */
492	michael	4094	event_addish(&event_try_connections, NULL);
493	adx	30
494			/* Setup the timeout check. I'll shift it later :) -- adrian */
495	michael	4399	event_add(&event_comm_checktimeouts, NULL);
496	adx	30
497	michael	4094	event_addish(&event_save_all_databases, NULL);
498	michael	1625
499	michael	6642	if (ConfigServerHide.flatten_links_delay && event_write_links_file.active == 0)
500	michael	4094	{
501	michael	6597	event_write_links_file.when = ConfigServerHide.flatten_links_delay;
502	michael	6636	event_add(&event_write_links_file, NULL);
503	michael	4094	}
504	adx	30
505	michael	6464	ilog(LOG_TYPE_IRCD, "Server Ready");
506	adx	30	io_loop();
507	michael	6464
508	michael	885	return 0;
509	adx	30	}