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 timespec newtime = { .tv_sec = 0, .tv_nsec = 0 };

  if (clock_gettime(CLOCK_REALTIME, &newtime) == -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_nsec = newtime.tv_nsec;
}

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_nsec / 1000 | (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;
}
Revision:	8899
Committed:	Sun Apr 21 18:08:14 2019 UTC (6 years, 4 months ago) by michael
Content type:	text/x-csrc
File size:	13310 byte(s)
Log Message:	- Replace gettimeofday() with clock_gettime(). We're not falling back to gettimeofday() for old/weird systems that don't have clock_gettime()
#	User	Rev	Content
1	adx	30	/*
2	michael	2916	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	adx	30	*
4	michael	8752	* Copyright (c) 1997-2019 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	michael	8089	#include "channel_mode.h"
33	adx	30	#include "client.h"
34			#include "event.h"
35			#include "fdlist.h"
36			#include "hash.h"
37	michael	6161	#include "id.h"
38	adx	30	#include "irc_string.h"
39			#include "ircd_signal.h"
40			#include "motd.h"
41	michael	1632	#include "conf.h"
42	adx	30	#include "hostmask.h"
43			#include "parse.h"
44	michael	3322	#include "res.h"
45	adx	30	#include "restart.h"
46	michael	982	#include "rng_mt.h"
47	adx	30	#include "s_bsd.h"
48	michael	1309	#include "log.h"
49	michael	6481	#include "server.h"
50	michael	8166	#include "server_capab.h"
51	adx	30	#include "send.h"
52			#include "modules.h"
53			#include "memory.h"
54			#include "ircd_getopt.h"
55	michael	1622	#include "conf_db.h"
56	michael	1632	#include "conf_class.h"
57	michael	4325	#include "ipcache.h"
58	michael	6185	#include "isupport.h"
59	michael	8729	#include "patchlevel.h"
60			#include "serno.h"
61	adx	30
62	michael	1858
63	michael	5737	struct SetOptions GlobalSetOptions; /* /quote set variables */
64	michael	5602	struct Counter Count;
65			struct ServerState_t server_state;
66			struct ServerStatistics ServerStats;
67	michael	7330	struct ServerTime SystemTime;
68	michael	5737	struct Connection meConnection; /* That's also part of me */
69	michael	5470	struct Client me = { .connection = &meConnection }; /* That's me */
70	adx	30
71	michael	5460	char **myargv;
72	adx	30	const char *logFileName = LPATH;
73			const char *pidFileName = PPATH;
74
75	michael	8658	bool dorehash;
76			bool doremotd;
77	adx	30
78	michael	8658	static bool printVersion;
79	michael	6735
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	michael	8862	BOOLEAN, "Run in foreground (don't detach)" },
98	michael	6735	{ "version", &printVersion,
99	michael	8862	BOOLEAN, "Print version and exit" },
100	michael	6735	{ "help", NULL, USAGE, "Print this text" },
101			{ NULL, NULL, STRING, NULL },
102			};
103
104	michael	4094	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	adx	30	void
140			set_time(void)
141			{
142	michael	8899	struct timespec newtime = { .tv_sec = 0, .tv_nsec = 0 };
143	adx	30
144	michael	8899	if (clock_gettime(CLOCK_REALTIME, &newtime) == -1)
145	adx	30	{
146	michael	6482	char buf[IRCD_BUFSIZE];
147
148			snprintf(buf, sizeof(buf), "Clock failure, TS can be corrupted: %s",
149			strerror(errno));
150	michael	8706	server_die(buf, false);
151	adx	30	}
152
153	michael	7330	if ((uintmax_t)newtime.tv_sec < CurrentTime)
154	adx	30	{
155	michael	6782	ilog(LOG_TYPE_IRCD, "System clock is running backwards - (%ju < %ju)",
156	michael	7330	(uintmax_t)newtime.tv_sec, CurrentTime);
157	michael	2980	sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
158	michael	6782	"System clock is running backwards - (%ju < %ju)",
159	michael	7330	(uintmax_t)newtime.tv_sec, CurrentTime);
160			event_set_back_events(CurrentTime - (uintmax_t)newtime.tv_sec);
161	adx	30	}
162
163	michael	6481	SystemTime.tv_sec = newtime.tv_sec;
164	michael	8899	SystemTime.tv_nsec = newtime.tv_nsec;
165	adx	30	}
166
167			static void
168			io_loop(void)
169			{
170	michael	8664	while (true)
171	adx	30	{
172			if (listing_client_list.head)
173			{
174	michael	4815	dlink_node node = NULL, node_next = NULL;
175			DLINK_FOREACH_SAFE(node, node_next, listing_client_list.head)
176	michael	8656	safe_list_channels(node->data, false);
177	adx	30	}
178
179	michael	4094	/* Run pending events */
180			event_run();
181	adx	30
182			comm_select();
183			exit_aborted_clients();
184			free_exited_clients();
185
186	michael	6735	/* Check to see whether we have to rehash the configuration. */
187	michael	8658	if (dorehash == true)
188	adx	30	{
189	michael	8658	conf_rehash(true);
190			dorehash = false;
191	adx	30	}
192	michael	3215
193	michael	8658	if (doremotd == true)
194	adx	30	{
195	michael	2150	motd_recache();
196	michael	6318	sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE,
197	michael	3065	"Got signal SIGUSR1, reloading motd file(s)");
198	michael	8658	doremotd = false;
199	adx	30	}
200			}
201			}
202
203			/* initalialize_global_set_options()
204			*
205			* inputs - none
206			* output - none
207	michael	2916	* side effects - This sets all global set options needed
208	adx	30	*/
209			static void
210			initialize_global_set_options(void)
211			{
212	michael	5489	GlobalSetOptions.maxclients = ConfigServerInfo.default_max_clients;
213	michael	8800	GlobalSetOptions.autoconn = true;
214	adx	30	GlobalSetOptions.spam_time = MIN_JOIN_LEAVE_TIME;
215	michael	5499	GlobalSetOptions.spam_num = MAX_JOIN_LEAVE_COUNT;
216			GlobalSetOptions.floodcount = ConfigGeneral.default_floodcount;
217	michael	7858	GlobalSetOptions.floodtime = ConfigGeneral.default_floodtime;
218	michael	5489	GlobalSetOptions.joinfloodcount = ConfigChannel.default_join_flood_count;
219			GlobalSetOptions.joinfloodtime = ConfigChannel.default_join_flood_time;
220	adx	30	}
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	michael	1325	FILE *fb;
232	adx	30
233	michael	1325	if ((fb = fopen(filename, "w")))
234	adx	30	{
235	michael	6470	char buf[IRCD_BUFSIZE];
236	adx	30	unsigned int pid = (unsigned int)getpid();
237
238	michael	6470	snprintf(buf, sizeof(buf), "%u\n", pid);
239	michael	1325
240	michael	6470	if (fputs(buf, fb) == -1)
241	michael	5737	ilog(LOG_TYPE_IRCD, "Error writing to pid file %s: %s",
242			filename, strerror(errno));
243	adx	30
244	michael	1325	fclose(fb);
245	adx	30	}
246			else
247	michael	5566	ilog(LOG_TYPE_IRCD, "Error opening pid file %s: %s",
248	michael	4748	filename, strerror(errno));
249	adx	30	}
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	michael	1325	FILE *fb;
263	michael	6470	char buf[IRCD_BUFSIZE];
264	adx	30
265	michael	1325	if ((fb = fopen(filename, "r")))
266	adx	30	{
267	michael	8702	if (fgets(buf, 20, fb) == NULL)
268	michael	6260	ilog(LOG_TYPE_IRCD, "Error reading from pid file %s: %s",
269			filename, strerror(errno));
270	adx	30	else
271			{
272	michael	6481	pid_t pid = atoi(buf);
273	adx	30
274	michael	8702	if (kill(pid, 0) == 0)
275	adx	30	{
276			/* log(L_ERROR, "Server is already running"); */
277			printf("ircd: daemon is already running\n");
278	michael	6646	exit(EXIT_FAILURE);
279	adx	30	}
280			}
281
282	michael	1325	fclose(fb);
283	adx	30	}
284			else if (errno != ENOENT)
285	michael	6260	ilog(LOG_TYPE_IRCD, "Error opening pid file %s: %s",
286			filename, strerror(errno));
287	adx	30	}
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	michael	8702	if (getrlimit(RLIMIT_CORE, &rlim) == 0)
303	adx	30	{
304			rlim.rlim_cur = rlim.rlim_max;
305			setrlimit(RLIMIT_CORE, &rlim);
306			}
307			}
308
309	michael	8774	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	michael	6735	/*
336			* print_startup - print startup information
337			*/
338			static void
339			print_startup(int pid)
340			{
341	michael	8729	printf("ircd: version %s(%s)\n", PATCHLEVEL, SERIALNUM);
342	michael	6735	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	adx	30	int
367			main(int argc, char *argv[])
368			{
369	michael	2253	/* Check to see if the user is running us as root, which is a nono */
370	michael	8702	if (geteuid() == 0)
371	adx	30	{
372	michael	3525	fprintf(stderr, "ERROR: This server won't run as root/superuser\n");
373	michael	982	return -1;
374	adx	30	}
375
376			/* Setup corefile size immediately after boot -kre */
377			setup_corefile();
378
379	michael	8774	setup_fdlimit();
380
381	michael	5545	/* Save server boot time right away, so getrusage works correctly */
382	adx	30	set_time();
383
384	michael	5545	/* It's not random, but it ought to be a little harder to guess */
385	michael	8899	init_genrand(SystemTime.tv_sec ^ (SystemTime.tv_nsec / 1000 \| (getpid() << 20)));
386	michael	982
387	michael	4340	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	michael	1702
396	adx	30	myargv = argv;
397	michael	5723	umask(077); /* umask 077: u=rwx,g=,o= */
398	adx	30
399			parseargs(&argc, &argv, myopts);
400
401	michael	8660	if (printVersion == true)
402	adx	30	{
403	michael	8729	printf("ircd: version %s(%s)\n", PATCHLEVEL, SERIALNUM);
404	adx	30	exit(EXIT_SUCCESS);
405			}
406
407	michael	4340	if (chdir(ConfigGeneral.dpath))
408	adx	30	{
409			perror("chdir");
410			exit(EXIT_FAILURE);
411			}
412
413	michael	8660	if (server_state.foreground == false)
414	adx	30	{
415			make_daemon();
416	michael	8414	close_standard_fds(); /* this needs to be before comm_select_init()! */
417	adx	30	}
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	michael	1831	log_set_file(LOG_TYPE_IRCD, 0, logFileName);
426	michael	4415
427	michael	8414	comm_select_init(); /* This needs to be setup early ! -- adrian */
428	michael	7279	tls_init();
429	michael	2253
430	adx	30	/* Check if there is pidfile and daemon already running */
431			check_pidfile(pidFileName);
432
433	michael	6185	isupport_init();
434	michael	1798	hash_init();
435	michael	4319	ipcache_init();
436	michael	1798	client_init();
437	michael	1632	class_init();
438	michael	7569	resolver_init(); /* Needs to be setup before the io loop */
439	michael	1404	modules_init();
440	michael	8656	read_conf_files(true); /* cold start init conf files */
441	michael	8166	capab_init(); /* Set up default_server_capabs */
442	michael	5489	initialize_global_set_options(); /* Has to be called after read_conf_files() */
443	michael	8089	channel_mode_init();
444	michael	2216	read_links_file();
445	michael	2150	motd_init();
446	michael	6189	user_modes_init();
447	adx	30
448	michael	4340	if (EmptyString(ConfigServerInfo.name))
449	michael	1115	{
450	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server name specified in serverinfo block.");
451	michael	1115	exit(EXIT_FAILURE);
452			}
453
454	michael	4340	strlcpy(me.name, ConfigServerInfo.name, sizeof(me.name));
455	adx	30
456	michael	6481	/* serverinfo {} description must exist. If not, error out.*/
457	michael	4340	if (EmptyString(ConfigServerInfo.description))
458	adx	30	{
459	michael	1247	ilog(LOG_TYPE_IRCD, "ERROR: No server description specified in serverinfo block.");
460	adx	30	exit(EXIT_FAILURE);
461			}
462	michael	885
463	michael	4340	strlcpy(me.info, ConfigServerInfo.description, sizeof(me.info));
464	adx	30
465	michael	6156	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	michael	6464	init_uid();
474
475	michael	5545	me.from = &me;
476			me.servptr = &me;
477			me.connection->lasttime = CurrentTime;
478			me.connection->since = CurrentTime;
479	michael	4588	me.connection->firsttime = CurrentTime;
480	adx	30
481			SetMe(&me);
482	michael	8426	server_make(&me);
483	adx	30
484	michael	1115	hash_add_id(&me);
485	adx	30	hash_add_client(&me);
486	michael	2916
487	michael	7963	dlinkAdd(&me, &me.node, &global_server_list);
488	adx	30
489	michael	6928	load_kline_database(ConfigGeneral.klinefile);
490			load_dline_database(ConfigGeneral.dlinefile);
491			load_xline_database(ConfigGeneral.xlinefile);
492			load_resv_database(ConfigGeneral.resvfile);
493	michael	1622
494	michael	8660	load_all_modules(true);
495	adx	30	load_conf_modules();
496	michael	8660	load_core_modules(true);
497	michael	1115
498	adx	30	write_pidfile(pidFileName);
499
500	michael	4094	event_addish(&event_cleanup_tklines, NULL);
501	adx	30
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	michael	4094	event_addish(&event_try_connections, NULL);
505	adx	30
506			/* Setup the timeout check. I'll shift it later :) -- adrian */
507	michael	4399	event_add(&event_comm_checktimeouts, NULL);
508	adx	30
509	michael	4094	event_addish(&event_save_all_databases, NULL);
510	michael	1625
511	michael	8660	if (ConfigServerHide.flatten_links_delay && event_write_links_file.active == false)
512	michael	4094	{
513	michael	6597	event_write_links_file.when = ConfigServerHide.flatten_links_delay;
514	michael	6636	event_add(&event_write_links_file, NULL);
515	michael	4094	}
516	adx	30
517	michael	8729	ilog(LOG_TYPE_IRCD, "Server ready. Running version: %s(%s)", PATCHLEVEL, SERIALNUM);
518	adx	30	io_loop();
519	michael	6464
520	michael	885	return 0;
521	adx	30	}