/*-
 * Copyright 2016 Vsevolod Stakhov
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#include "config.h"
#include "blas-config.h"
#include "rspamd.h"
#include "libserver/maps/map.h"
#include "lua/lua_common.h"
#include "libserver/worker_util.h"
#include "libserver/rspamd_control.h"
#include "ottery.h"
#include "cryptobox.h"
#include "utlist.h"
#include "unix-std.h"
/* pwd and grp */
#ifdef HAVE_PWD_H
#include <pwd.h>
#endif
#ifdef HAVE_GRP_H
#include <grp.h>
#endif

#ifdef HAVE_NFTW
#include <ftw.h>
#endif

#include <signal.h>
#ifdef HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif
#ifdef HAVE_LIBUTIL_H
#include <libutil.h>
#endif

#ifdef HAVE_OPENSSL
#include <openssl/err.h>
#include <openssl/evp.h>
#include <math.h>

#endif

#include "sqlite3.h"
#include "contrib/libev/ev.h"

#ifdef WITH_HYPERSCAN
#include "libserver/hyperscan_tools.h"
#endif

/* 2 seconds to fork new process in place of dead one */
#define SOFT_FORK_TIME 2

/* 10 seconds after getting termination signal to terminate all workers with SIGKILL */
#define TERMINATION_INTERVAL (0.2)

static gboolean load_rspamd_config(struct rspamd_main *rspamd_main,
								   struct rspamd_config *cfg,
								   gboolean init_modules,
								   enum rspamd_post_load_options opts,
								   gboolean reload);
static void rspamd_cld_handler(EV_P_ ev_child *w,
							   struct rspamd_main *rspamd_main,
							   struct rspamd_worker *wrk);

/* Control socket */
static gint control_fd;
static ev_io control_ev;
static struct rspamd_stat old_stat;
static ev_timer stat_ev;

static gboolean valgrind_mode = FALSE;

/* Cmdline options */
static gboolean no_fork = FALSE;
static gboolean show_version = FALSE;
static gchar **cfg_names = NULL;
static gchar *rspamd_user = NULL;
static gchar *rspamd_group = NULL;
static gchar *rspamd_pidfile = NULL;
static gboolean is_debug = FALSE;
static gboolean is_insecure = FALSE;
static GHashTable *ucl_vars = NULL;
static gchar **lua_env = NULL;
static gboolean skip_template = FALSE;

static gint term_attempts = 0;

/* List of active listen sockets indexed by worker type */
static GHashTable *listen_sockets = NULL;

/* Defined in modules.c */
extern module_t *modules[];
extern worker_t *workers[];

/* Command line options */
static gboolean rspamd_parse_var(const gchar *option_name,
								 const gchar *value, gpointer data,
								 GError **error);
static GOptionEntry entries[] =
	{
		{"no-fork", 'f', 0, G_OPTION_ARG_NONE, &no_fork,
		 "Do not daemonize main process", NULL},
		{"config", 'c', 0, G_OPTION_ARG_FILENAME_ARRAY, &cfg_names,
		 "Specify config file(s)", NULL},
		{"user", 'u', 0, G_OPTION_ARG_STRING, &rspamd_user,
		 "User to run rspamd as", NULL},
		{"group", 'g', 0, G_OPTION_ARG_STRING, &rspamd_group,
		 "Group to run rspamd as", NULL},
		{"pid", 'p', 0, G_OPTION_ARG_STRING, &rspamd_pidfile, "Path to pidfile",
		 NULL},
		{"debug", 'd', 0, G_OPTION_ARG_NONE, &is_debug, "Force debug output",
		 NULL},
		{"insecure", 'i', 0, G_OPTION_ARG_NONE, &is_insecure,
		 "Ignore running workers as privileged users (insecure)", NULL},
		{"version", 'v', 0, G_OPTION_ARG_NONE, &show_version,
		 "Show version and exit", NULL},
		{"var", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &rspamd_parse_var,
		 "Redefine/define environment variable", NULL},
		{"skip-template", 'T', 0, G_OPTION_ARG_NONE, &skip_template,
		 "Do not apply Jinja templates", NULL},
		{"lua-env", '\0', 0, G_OPTION_ARG_FILENAME_ARRAY, &lua_env,
		 "Load lua environment from the specified files", NULL},
		{NULL, 0, 0, G_OPTION_ARG_NONE, NULL, NULL, NULL}};

static gboolean
rspamd_parse_var(const gchar *option_name,
				 const gchar *value, gpointer data,
				 GError **error)
{
	gchar *k, *v, *t;

	t = strchr(value, '=');

	if (t != NULL) {
		k = g_strdup(value);
		t = k + (t - value);
		v = g_strdup(t + 1);
		*t = '\0';

		if (ucl_vars == NULL) {
			ucl_vars = g_hash_table_new_full(rspamd_strcase_hash,
											 rspamd_strcase_equal, g_free, g_free);
		}

		g_hash_table_insert(ucl_vars, k, v);
	}
	else {
		g_set_error(error, g_quark_try_string("main"), EINVAL,
					"Bad variable format: %s", value);
		return FALSE;
	}

	return TRUE;
}

static void
read_cmd_line(gint *argc, gchar ***argv, struct rspamd_config *cfg)
{
	GError *error = NULL;
	GOptionContext *context;
	guint cfg_num;

	context = g_option_context_new("- run rspamd daemon");
#if defined(GIT_VERSION) && GIT_VERSION == 1
	g_option_context_set_summary(context,
								 "Summary:\n  Rspamd daemon version " RVERSION "-git\n  Git id: " RID);
#else
	g_option_context_set_summary(context,
								 "Summary:\n  Rspamd daemon version " RVERSION);
#endif
	g_option_context_add_main_entries(context, entries, NULL);

	if (!g_option_context_parse(context, argc, argv, &error)) {
		fprintf(stderr, "option parsing failed: %s\n", error->message);
		g_option_context_free(context);
		exit(EXIT_FAILURE);
	}

	cfg->rspamd_user = rspamd_user;
	cfg->rspamd_group = rspamd_group;
	cfg_num = cfg_names != NULL ? g_strv_length(cfg_names) : 0;

	if (cfg_num == 0) {
		cfg->cfg_name = FIXED_CONFIG_FILE;
	}
	else {
		cfg->cfg_name = cfg_names[0];
		g_assert(cfg_num == 1);
	}

	cfg->pid_file = rspamd_pidfile;
	g_option_context_free(context);
}

static int
rspamd_write_pid(struct rspamd_main *main)
{
	pid_t pid;

	if (main->cfg->pid_file == NULL) {
		return -1;
	}
	main->pfh = rspamd_pidfile_open(main->cfg->pid_file, 0644, &pid);

	if (main->pfh == NULL) {
		return -1;
	}

	if (main->is_privileged) {
		/* Force root user as owner of pid file */
#ifdef HAVE_PIDFILE_FILENO
		if (fchown(pidfile_fileno(main->pfh), 0, 0) == -1) {
#else
		if (fchown(main->pfh->pf_fd, 0, 0) == -1) {
#endif
		}
	}

	rspamd_pidfile_write(main->pfh);

	return 0;
}

/* Detect privileged mode */
static void
detect_priv(struct rspamd_main *rspamd_main)
{
	struct passwd *pwd;
	struct group *grp;
	uid_t euid;

	euid = geteuid();

	if (euid == 0) {
		if (!rspamd_main->cfg->rspamd_user && !is_insecure) {
			msg_err_main(
				"cannot run rspamd workers as root user, please add -u and -g options to select a proper unprivileged user or specify --insecure flag");
			exit(EXIT_FAILURE);
		}
		else if (is_insecure) {
			rspamd_main->is_privileged = TRUE;
			rspamd_main->workers_uid = 0;
			rspamd_main->workers_gid = 0;
		}
		else {
			rspamd_main->is_privileged = TRUE;
			pwd = getpwnam(rspamd_main->cfg->rspamd_user);
			if (pwd == NULL) {
				msg_err_main("user specified does not exists (%s), aborting",
							 strerror(errno));
				exit(-errno);
			}
			if (rspamd_main->cfg->rspamd_group) {
				grp = getgrnam(rspamd_main->cfg->rspamd_group);
				if (grp == NULL) {
					msg_err_main("group specified does not exists (%s), aborting",
								 strerror(errno));
					exit(-errno);
				}
				rspamd_main->workers_gid = grp->gr_gid;
			}
			else {
				/* Use the main group of user */
				rspamd_main->workers_gid = pwd->pw_gid;
			}
			rspamd_main->workers_uid = pwd->pw_uid;
		}
	}
	else {
		rspamd_main->is_privileged = FALSE;
		rspamd_main->workers_uid = (uid_t) -1;
		rspamd_main->workers_gid = (gid_t) -1;
	}
}

static void
config_logger(rspamd_mempool_t *pool, gpointer ud)
{
	struct rspamd_main *rspamd_main = ud;

	rspamd_main->logger = rspamd_log_open_specific(rspamd_main->server_pool,
												   rspamd_main->cfg,
												   "main",
												   rspamd_main->workers_uid,
												   rspamd_main->workers_gid);

	if (rspamd_main->logger == NULL) {
		/*
		 * XXX:
		 * Error has been already logged (in fact,
		 * we might fall back to console logger here)
		 */
		exit(EXIT_FAILURE);
	}

	rspamd_logger_configure_modules(rspamd_main->cfg->debug_modules);
}

static gboolean
reread_config(struct rspamd_main *rspamd_main)
{
	struct rspamd_config *tmp_cfg, *old_cfg;
	gchar *cfg_file;
	int load_opts = RSPAMD_CONFIG_INIT_VALIDATE | RSPAMD_CONFIG_INIT_SYMCACHE |
					RSPAMD_CONFIG_INIT_LIBS | RSPAMD_CONFIG_INIT_URL;

	rspamd_symcache_save(rspamd_main->cfg->cache);
	tmp_cfg = rspamd_config_new(RSPAMD_CONFIG_INIT_DEFAULT);
	tmp_cfg->libs_ctx = rspamd_main->cfg->libs_ctx;
	REF_RETAIN(tmp_cfg->libs_ctx);
	cfg_file = rspamd_mempool_strdup(tmp_cfg->cfg_pool,
									 rspamd_main->cfg->cfg_name);
	/* Save some variables */
	tmp_cfg->cfg_name = cfg_file;
	old_cfg = rspamd_main->cfg;
	rspamd_main->cfg = tmp_cfg;
	rspamd_logger_t *old_logger = rspamd_main->logger;

	if (!load_rspamd_config(rspamd_main, tmp_cfg, TRUE, load_opts, TRUE)) {
		rspamd_main->cfg = old_cfg;
		rspamd_main->logger = old_logger;
		msg_err_main("cannot parse new config file, revert to old one");
		REF_RELEASE(tmp_cfg);

		return FALSE;
	}
	else {
		rspamd_log_close(old_logger);
		msg_info_main("replacing config");
		REF_RELEASE(old_cfg);
		rspamd_main->cfg->rspamd_user = rspamd_user;
		rspamd_main->cfg->rspamd_group = rspamd_group;
		/* Here, we can do post actions with the existing config */
		/*
		 * As some rules are defined in lua, we need to process them, then init
		 * modules and merely afterwards to init modules
		 */
		rspamd_lua_post_load_config(tmp_cfg);
		rspamd_init_filters(tmp_cfg, true, false);

		/* Do post-load actions */
		rspamd_config_post_load(tmp_cfg,
								load_opts | RSPAMD_CONFIG_INIT_POST_LOAD_LUA | RSPAMD_CONFIG_INIT_PRELOAD_MAPS);
		msg_info_main("config has been reread successfully");
	}

	return TRUE;
}

struct waiting_worker {
	struct rspamd_main *rspamd_main;
	struct ev_timer wait_ev;
	struct rspamd_worker_conf *cf;
	guint oldindex;
};

static void
rspamd_fork_delayed_cb(EV_P_ ev_timer *w, int revents)
{
	struct waiting_worker *waiting_worker = (struct waiting_worker *) w->data;

	ev_timer_stop(EV_A_ & waiting_worker->wait_ev);
	rspamd_fork_worker(waiting_worker->rspamd_main, waiting_worker->cf,
					   waiting_worker->oldindex,
					   waiting_worker->rspamd_main->event_loop,
					   rspamd_cld_handler, listen_sockets);
	REF_RELEASE(waiting_worker->cf);
	g_free(waiting_worker);
}

static void
rspamd_fork_delayed(struct rspamd_worker_conf *cf,
					guint index,
					struct rspamd_main *rspamd_main)
{
	struct waiting_worker *nw;

	nw = g_malloc0(sizeof(*nw));
	nw->cf = cf;
	nw->oldindex = index;
	nw->rspamd_main = rspamd_main;
	REF_RETAIN(cf);
	nw->wait_ev.data = nw;
	ev_timer_init(&nw->wait_ev, rspamd_fork_delayed_cb, SOFT_FORK_TIME, 0.0);
	ev_timer_start(rspamd_main->event_loop, &nw->wait_ev);
}

static GList *
create_listen_socket(GPtrArray *addrs, guint cnt,
					 enum rspamd_worker_socket_type listen_type)
{
	GList *result = NULL;
	gint fd;
	guint i;
	static const int listen_opts = RSPAMD_INET_ADDRESS_LISTEN_ASYNC;
	struct rspamd_worker_listen_socket *ls;

	g_ptr_array_sort(addrs, rspamd_inet_address_compare_ptr);
	for (i = 0; i < cnt; i++) {

		/*
		 * Copy address to avoid reload issues
		 */
		if (listen_type & RSPAMD_WORKER_SOCKET_TCP) {
			fd = rspamd_inet_address_listen(g_ptr_array_index(addrs, i),
											SOCK_STREAM,
											listen_opts, -1);
			if (fd != -1) {
				ls = g_malloc0(sizeof(*ls));
				ls->addr = rspamd_inet_address_copy(g_ptr_array_index(addrs, i), NULL);
				ls->fd = fd;
				ls->type = RSPAMD_WORKER_SOCKET_TCP;
				result = g_list_prepend(result, ls);
			}
		}
		if (listen_type & RSPAMD_WORKER_SOCKET_UDP) {
			fd = rspamd_inet_address_listen(g_ptr_array_index(addrs, i),
											SOCK_DGRAM,
											listen_opts | RSPAMD_INET_ADDRESS_LISTEN_REUSEPORT, -1);
			if (fd != -1) {
				ls = g_malloc0(sizeof(*ls));
				ls->addr = rspamd_inet_address_copy(g_ptr_array_index(addrs, i), NULL);
				ls->fd = fd;
				ls->type = RSPAMD_WORKER_SOCKET_UDP;
				result = g_list_prepend(result, ls);
			}
		}
	}

	return result;
}

static GList *
systemd_get_socket(struct rspamd_main *rspamd_main, const gchar *fdname)
{
	int number, sock, num_passed, flags;
	GList *result = NULL;
	const gchar *e;
	gchar **fdnames;
	gchar *end;
	struct stat st;
	static const int sd_listen_fds_start = 3; /* SD_LISTEN_FDS_START */
	struct rspamd_worker_listen_socket *ls;

	union {
		struct sockaddr_storage ss;
		struct sockaddr sa;
		struct sockaddr_un sun;
		struct sockaddr_in6 s6;
	} addr_storage;
	socklen_t slen = sizeof(addr_storage);
	gint stype;

	number = strtoul(fdname, &end, 10);
	if (end != NULL && *end != '\0') {
		/* Cannot parse as number, assume a name in LISTEN_FDNAMES. */
		e = getenv("LISTEN_FDNAMES");
		if (!e) {
			msg_err_main("cannot get systemd variable 'LISTEN_FDNAMES'");
			errno = ENOENT;
			return NULL;
		}

		fdnames = g_strsplit(e, ":", -1);
		for (number = 0; fdnames[number]; number++) {
			if (!strcmp(fdnames[number], fdname)) {
				break;
			}
		}
		if (!fdnames[number]) {
			number = -1;
		}
		g_strfreev(fdnames);
	}

	if (number < 0) {
		msg_warn_main("cannot find systemd socket: %s", fdname);
		errno = ENOENT;
		return NULL;
	}

	e = getenv("LISTEN_FDS");
	if (e != NULL) {
		errno = 0;
		num_passed = strtoul(e, &end, 10);
		if ((end == NULL || *end == '\0') && num_passed > number) {
			sock = number + sd_listen_fds_start;
			if (fstat(sock, &st) == -1) {
				msg_warn_main("cannot stat systemd descriptor %d", sock);
				return NULL;
			}
			if (!S_ISSOCK(st.st_mode)) {
				msg_warn_main("systemd descriptor %d is not a socket", sock);
				errno = EINVAL;
				return NULL;
			}
			flags = fcntl(sock, F_GETFD);

			if (flags != -1) {
				(void) fcntl(sock, F_SETFD, flags | FD_CLOEXEC);
			}

			rspamd_socket_nonblocking(sock);

			if (getsockname(sock, &addr_storage.sa, &slen) == -1) {
				msg_warn_main("cannot get name for systemd descriptor %d: %s",
							  sock, strerror(errno));
				errno = EINVAL;
				return NULL;
			}

			ls = g_malloc0(sizeof(*ls));
			ls->addr = rspamd_inet_address_from_sa(&addr_storage.sa, slen);
			ls->fd = sock;
			ls->is_systemd = true;

			slen = sizeof(stype);
			if (getsockopt(sock, SOL_SOCKET, SO_TYPE, &stype, &slen) != -1) {
				if (stype == SOCK_STREAM) {
					ls->type = RSPAMD_WORKER_SOCKET_TCP;
				}
				else {
					ls->type = RSPAMD_WORKER_SOCKET_UDP;
				}
			}
			else {
				msg_warn_main("cannot get type for systemd descriptor %d: %s",
							  sock, strerror(errno));
				ls->type = RSPAMD_WORKER_SOCKET_TCP;
			}


			result = g_list_prepend(result, ls);
		}
		else if (num_passed <= number) {
			msg_err_main("systemd LISTEN_FDS does not contain the expected fd: %d",
						 num_passed);
			errno = EINVAL;
		}
	}
	else {
		msg_err_main("cannot get systemd variable 'LISTEN_FDS'");
		errno = ENOENT;
	}

	return result;
}

static void
pass_signal_cb(gpointer key, gpointer value, gpointer ud)
{
	struct rspamd_worker *cur = value;
	gint signo = GPOINTER_TO_INT(ud);

	kill(cur->pid, signo);
}

static void
rspamd_pass_signal(GHashTable *workers, gint signo)
{
	g_hash_table_foreach(workers, pass_signal_cb, GINT_TO_POINTER(signo));
}

static inline uintptr_t
make_listen_key(struct rspamd_worker_bind_conf *cf)
{
	rspamd_cryptobox_fast_hash_state_t st;
	guint i, keylen = 0;
	guint8 *key;
	rspamd_inet_addr_t *addr;
	guint16 port;

	rspamd_cryptobox_fast_hash_init(&st, rspamd_hash_seed());
	if (cf->is_systemd) {
		/* Something like 'systemd:0' or 'systemd:controller'. */
		rspamd_cryptobox_fast_hash_update(&st, cf->name, strlen(cf->name));
	}
	else {
		rspamd_cryptobox_fast_hash_update(&st, cf->name, strlen(cf->name));
		for (i = 0; i < cf->cnt; i++) {
			addr = g_ptr_array_index(cf->addrs, i);
			key = rspamd_inet_address_get_hash_key(
				addr, &keylen);
			rspamd_cryptobox_fast_hash_update(&st, key, keylen);
			port = rspamd_inet_address_get_port(addr);
			rspamd_cryptobox_fast_hash_update(&st, &port, sizeof(port));
		}
	}

	return rspamd_cryptobox_fast_hash_final(&st);
}

static void
spawn_worker_type(struct rspamd_main *rspamd_main, struct ev_loop *event_loop,
				  struct rspamd_worker_conf *cf)
{
	gint i;

	if (cf->count < 0) {
		msg_info_main("skip spawning of worker %s: disabled in configuration",
					  cf->worker->name);

		return;
	}
	if (cf->worker->flags & RSPAMD_WORKER_UNIQUE) {
		if (cf->count > 1) {
			msg_warn_main(
				"cannot spawn more than 1 %s worker, so spawn one",
				cf->worker->name);
		}
		rspamd_fork_worker(rspamd_main, cf, 0, event_loop, rspamd_cld_handler,
						   listen_sockets);
	}
	else if (cf->worker->flags & RSPAMD_WORKER_THREADED) {
		rspamd_fork_worker(rspamd_main, cf, 0, event_loop, rspamd_cld_handler,
						   listen_sockets);
	}
	else {
		for (i = 0; i < cf->count; i++) {
			rspamd_fork_worker(rspamd_main, cf, i, event_loop,
							   rspamd_cld_handler, listen_sockets);
		}
	}
}

static void
spawn_workers(struct rspamd_main *rspamd_main, struct ev_loop *ev_base)
{
	GList *cur, *ls;
	struct rspamd_worker_conf *cf;
	gpointer p;
	guintptr key;
	struct rspamd_worker_bind_conf *bcf;
	gboolean listen_ok = FALSE;
	GPtrArray *seen_mandatory_workers;
	worker_t **cw, *wrk;
	guint i;

	/* Special hack for hs_helper if it's not defined in a config */
	seen_mandatory_workers = g_ptr_array_new();
	cur = rspamd_main->cfg->workers;

	while (cur) {
		cf = cur->data;
		listen_ok = FALSE;

		if (cf->worker == NULL) {
			msg_err_main("type of worker is unspecified, skip spawning");
		}
		else {
			if (!cf->enabled || cf->count <= 0) {
				msg_info_main("worker of type %s(%s) is disabled in the config, "
							  "skip spawning",
							  g_quark_to_string(cf->type),
							  cf->bind_conf ? cf->bind_conf->name : "none");
				cur = g_list_next(cur);

				continue;
			}

			if (cf->worker->flags & RSPAMD_WORKER_ALWAYS_START) {
				g_ptr_array_add(seen_mandatory_workers, cf->worker);
			}
			if (cf->worker->flags & RSPAMD_WORKER_HAS_SOCKET) {
				LL_FOREACH(cf->bind_conf, bcf)
				{
					key = make_listen_key(bcf);

					if ((p =
							 g_hash_table_lookup(listen_sockets,
												 GINT_TO_POINTER(key))) == NULL) {

						if (!bcf->is_systemd) {
							/* Create listen socket */
							ls = create_listen_socket(bcf->addrs, bcf->cnt,
													  cf->worker->listen_type);
						}
						else {
							ls = systemd_get_socket(rspamd_main,
													g_ptr_array_index(bcf->addrs, 0));
						}

						if (ls == NULL) {
							msg_err_main("cannot listen on %s socket %s: %s",
										 bcf->is_systemd ? "systemd" : "normal",
										 bcf->name,
										 strerror(errno));
						}
						else {
							g_hash_table_insert(listen_sockets, (gpointer) key, ls);
							listen_ok = TRUE;
						}
					}
					else {
						/* We had socket for this type of worker */
						ls = p;
						listen_ok = TRUE;
					}
					/* Do not add existing lists as it causes loops */
					if (g_list_position(cf->listen_socks, ls) == -1) {
						cf->listen_socks = g_list_concat(cf->listen_socks, ls);
					}
				}

				if (listen_ok) {
					spawn_worker_type(rspamd_main, ev_base, cf);
				}
				else {
					if (cf->bind_conf == NULL) {
						msg_err_main("cannot create listen socket for %s",
									 g_quark_to_string(cf->type));
					}
					else {
						msg_err_main("cannot create listen socket for %s at %s",
									 g_quark_to_string(cf->type), cf->bind_conf->name);
					}

					rspamd_hard_terminate(rspamd_main);
					g_assert_not_reached();
				}
			}
			else {
				spawn_worker_type(rspamd_main, ev_base, cf);
			}
		}

		cur = g_list_next(cur);
	}

	for (cw = workers; *cw != NULL; cw++) {
		gboolean seen = FALSE;

		wrk = *cw;

		if (wrk->flags & RSPAMD_WORKER_ALWAYS_START) {
			for (i = 0; i < seen_mandatory_workers->len; i++) {
				if (wrk == g_ptr_array_index(seen_mandatory_workers, i)) {
					seen = TRUE;
					break;
				}
			}

			if (!seen) {
				cf = rspamd_config_new_worker(rspamd_main->cfg, NULL);
				cf->count = 1;
				cf->worker = wrk;
				cf->type = g_quark_from_static_string(wrk->name);

				if (cf->worker->worker_init_func) {
					cf->ctx = cf->worker->worker_init_func(rspamd_main->cfg);
				}

				spawn_worker_type(rspamd_main, ev_base, cf);
			}
		}
	}

	g_ptr_array_free(seen_mandatory_workers, TRUE);
}

static void
kill_old_workers(gpointer key, gpointer value, gpointer unused)
{
	struct rspamd_worker *w = value;
	struct rspamd_main *rspamd_main;

	rspamd_main = w->srv;

	if (w->state == rspamd_worker_state_wanna_die) {
		w->state = rspamd_worker_state_terminating;
		kill(w->pid, SIGUSR2);
		ev_io_stop(rspamd_main->event_loop, &w->srv_ev);
		g_hash_table_remove_all(w->control_events_pending);
		msg_info_main("send signal to worker %P", w->pid);
	}
	else if (w->state != rspamd_worker_state_running) {
		msg_info_main("do not send signal to worker %P, already sent", w->pid);
	}
}

static void
mark_old_workers(gpointer key, gpointer value, gpointer unused)
{
	struct rspamd_worker *w = value;

	if (w->state == rspamd_worker_state_running) {
		w->state = rspamd_worker_state_wanna_die;
	}

	w->flags |= RSPAMD_WORKER_OLD_CONFIG;
}

static void
rspamd_worker_wait(struct rspamd_worker *w)
{
	struct rspamd_main *rspamd_main;
	rspamd_main = w->srv;

	if (term_attempts < 0) {
		if (w->cf->worker->flags & RSPAMD_WORKER_KILLABLE) {
			if (kill(w->pid, SIGKILL) == -1) {
				if (errno == ESRCH) {
					/* We have actually killed the process */
					return;
				}
			}
			else {
				msg_warn_main("terminate worker %s(%P) with SIGKILL",
							  g_quark_to_string(w->type), w->pid);
			}
		}
		else {
			kill(w->pid, SIGKILL);
			if (errno == ESRCH) {
				/* We have actually killed the process */
				return;
			}
			else {
				msg_err_main("data corruption warning: terminating "
							 "special worker %s(%P) with SIGKILL",
							 g_quark_to_string(w->type), w->pid);
			}
		}
	}
}

static void
hash_worker_wait_callback(gpointer key, gpointer value, gpointer unused)
{
	rspamd_worker_wait((struct rspamd_worker *) value);
}

struct core_check_cbdata {
	struct rspamd_config *cfg;
	gsize total_count;
	gsize total_size;
};

#ifdef HAVE_NFTW

static struct core_check_cbdata cores_cbdata;

static gint
rspamd_check_core_cb(const gchar *path, const struct stat *st,
					 gint flag, struct FTW *ft)
{
	if (S_ISREG(st->st_mode)) {
		cores_cbdata.total_count++;
		/* Use physical size instead of displayed one */
		cores_cbdata.total_size += st->st_blocks * 512;
	}

	return 0;
}

#endif

static void
rspamd_check_core_limits(struct rspamd_main *rspamd_main)
{
#ifdef HAVE_NFTW
	struct rspamd_config *cfg = rspamd_main->cfg;

	cores_cbdata.cfg = cfg;
	cores_cbdata.total_count = 0;
	cores_cbdata.total_size = 0;

	if (cfg->cores_dir && (cfg->max_cores_count || cfg->max_cores_size)) {
		if (nftw(cfg->cores_dir, rspamd_check_core_cb, 1, FTW_MOUNT | FTW_PHYS) == -1) {
			msg_err_main("nftw failed for path %s: %s", cfg->cores_dir,
						 strerror(errno));
		}
		else {
			if (!rspamd_main->cores_throttling) {
				if (cfg->max_cores_size &&
					cores_cbdata.total_size > cfg->max_cores_size) {
					msg_warn_main(
						"enable cores throttling as size of cores in"
						" %s is %Hz, limit is %Hz",
						cfg->cores_dir,
						cores_cbdata.total_size,
						cfg->max_cores_size);
					rspamd_main->cores_throttling = TRUE;
				}
				if (cfg->max_cores_count &&
					cores_cbdata.total_count > cfg->max_cores_count) {
					msg_warn_main(
						"enable cores throttling as count of cores in"
						" %s is %z, limit is %z",
						cfg->cores_dir,
						cores_cbdata.total_count,
						cfg->max_cores_count);
					rspamd_main->cores_throttling = TRUE;
				}
			}
			else {
				if (cfg->max_cores_size &&
					cores_cbdata.total_size < cfg->max_cores_size) {
					msg_info_main(
						"disable cores throttling as size of cores in"
						" %s is now %Hz, limit is %Hz",
						cfg->cores_dir,
						cores_cbdata.total_size,
						cfg->max_cores_size);
					rspamd_main->cores_throttling = FALSE;
				}
				if (cfg->max_cores_count &&
					cores_cbdata.total_count < cfg->max_cores_count) {
					msg_info_main(
						"disable cores throttling as count of cores in"
						" %s is %z, limit is %z",
						cfg->cores_dir,
						cores_cbdata.total_count,
						cfg->max_cores_count);
					rspamd_main->cores_throttling = FALSE;
				}
			}
		}
	}
#endif
}

static void
reopen_log_handler(gpointer key, gpointer value, gpointer unused)
{
	struct rspamd_worker *w = value;
	struct rspamd_main *rspamd_main;

	rspamd_main = w->srv;

	if (kill(w->pid, SIGUSR1) == -1) {
		msg_err_main("kill failed for pid %P: %s", w->pid, strerror(errno));
	}
}

static gboolean
load_rspamd_config(struct rspamd_main *rspamd_main,
				   struct rspamd_config *cfg, gboolean init_modules,
				   enum rspamd_post_load_options opts,
				   gboolean reload)
{
	cfg->compiled_modules = modules;
	cfg->compiled_workers = workers;

	if (!rspamd_config_read(cfg, cfg->cfg_name, config_logger, rspamd_main,
							ucl_vars, skip_template, lua_env)) {
		return FALSE;
	}

	/* Strictly set temp dir */
	if (!cfg->temp_dir) {
		msg_warn_main("tempdir is not set, trying to use $TMPDIR");
		cfg->temp_dir =
			rspamd_mempool_strdup(cfg->cfg_pool, getenv("TMPDIR"));

		if (!cfg->temp_dir) {
			msg_warn_main("$TMPDIR is empty too, using /tmp as default");
			cfg->temp_dir = rspamd_mempool_strdup(cfg->cfg_pool, "/tmp");
		}
	}

	if (!reload) {
		/*
		 * As some rules are defined in lua, we need to process them, then init
		 * modules and merely afterwards to init modules
		 */
		rspamd_lua_post_load_config(cfg);

		if (init_modules) {
			if (!rspamd_init_filters(cfg, reload, false)) {
				return FALSE;
			}
		}

		/* Do post-load actions */
		if (!rspamd_config_post_load(cfg, opts)) {
			return FALSE;
		}
	}

	return TRUE;
}

static void
rspamd_detach_worker(struct rspamd_main *rspamd_main, struct rspamd_worker *wrk)
{
	ev_io_stop(rspamd_main->event_loop, &wrk->srv_ev);
	ev_timer_stop(rspamd_main->event_loop, &wrk->hb.heartbeat_ev);
}

static void
rspamd_attach_worker(struct rspamd_main *rspamd_main, struct rspamd_worker *wrk)
{
	ev_io_start(rspamd_main->event_loop, &wrk->srv_ev);
	ev_timer_start(rspamd_main->event_loop, &wrk->hb.heartbeat_ev);
}

static void
stop_srv_ev(gpointer key, gpointer value, gpointer ud)
{
	struct rspamd_worker *cur = (struct rspamd_worker *) value;
	struct rspamd_main *rspamd_main = (struct rspamd_main *) ud;

	rspamd_detach_worker(rspamd_main, cur);
}

static void
start_srv_ev(gpointer key, gpointer value, gpointer ud)
{
	struct rspamd_worker *cur = (struct rspamd_worker *) value;
	struct rspamd_main *rspamd_main = (struct rspamd_main *) ud;

	rspamd_attach_worker(rspamd_main, cur);
}

static void
rspamd_final_timer_handler(EV_P_ ev_timer *w, int revents)
{
	struct rspamd_main *rspamd_main = (struct rspamd_main *) w->data;

	term_attempts--;

	g_hash_table_foreach(rspamd_main->workers, hash_worker_wait_callback,
						 NULL);

	if (g_hash_table_size(rspamd_main->workers) == 0) {
		ev_break(rspamd_main->event_loop, EVBREAK_ALL);
	}
}

/* Signal handlers */
static void
rspamd_term_handler(struct ev_loop *loop, ev_signal *w, int revents)
{
	struct rspamd_main *rspamd_main = (struct rspamd_main *) w->data;
	static ev_timer ev_finale;
	ev_tstamp shutdown_ts;

	if (!rspamd_main->wanna_die) {
		rspamd_main->wanna_die = TRUE;
		shutdown_ts = MAX(SOFT_SHUTDOWN_TIME,
						  rspamd_main->cfg->task_timeout * 2.0);
		msg_info_main("catch termination signal, waiting for %d children for %.2f seconds",
					  (gint) g_hash_table_size(rspamd_main->workers),
					  valgrind_mode ? shutdown_ts * 10 : shutdown_ts);
		/* Stop srv events to avoid false notifications */
		g_hash_table_foreach(rspamd_main->workers, stop_srv_ev, rspamd_main);
		rspamd_pass_signal(rspamd_main->workers, SIGTERM);

		if (control_fd != -1) {
			ev_io_stop(rspamd_main->event_loop, &control_ev);
			close(control_fd);
		}

		if (valgrind_mode) {
			/* Special case if we are likely running with valgrind */
			term_attempts = shutdown_ts / TERMINATION_INTERVAL * 10;
		}
		else {
			term_attempts = shutdown_ts / TERMINATION_INTERVAL;
		}

		ev_finale.data = rspamd_main;
		ev_timer_init(&ev_finale, rspamd_final_timer_handler,
					  TERMINATION_INTERVAL, TERMINATION_INTERVAL);
		ev_timer_start(rspamd_main->event_loop, &ev_finale);
	}
}

static void
rspamd_usr1_handler(struct ev_loop *loop, ev_signal *w, int revents)
{
	struct rspamd_main *rspamd_main = (struct rspamd_main *) w->data;

	if (!rspamd_main->wanna_die) {
		rspamd_log_reopen(rspamd_main->logger,
						  rspamd_main->cfg,
						  rspamd_main->workers_uid,
						  rspamd_main->workers_gid);
		msg_info_main("logging reinitialised");
		g_hash_table_foreach(rspamd_main->workers, reopen_log_handler,
							 NULL);
	}
}

static void
rspamd_stat_update_handler(struct ev_loop *loop, ev_timer *w, int revents)
{
	struct rspamd_main *rspamd_main = (struct rspamd_main *) w->data;
	struct rspamd_stat cur_stat;
	gchar proctitle[128];

	memcpy(&cur_stat, rspamd_main->stat, sizeof(cur_stat));

	if (old_stat.messages_scanned > 0 &&
		cur_stat.messages_scanned > old_stat.messages_scanned) {
		gdouble rate = (double) (cur_stat.messages_scanned - old_stat.messages_scanned) /
					   w->repeat;
		gdouble old_spam = old_stat.actions_stat[METRIC_ACTION_REJECT] +
						   old_stat.actions_stat[METRIC_ACTION_ADD_HEADER] +
						   old_stat.actions_stat[METRIC_ACTION_REWRITE_SUBJECT];
		gdouble old_ham = old_stat.actions_stat[METRIC_ACTION_NOACTION];
		gdouble new_spam = cur_stat.actions_stat[METRIC_ACTION_REJECT] +
						   cur_stat.actions_stat[METRIC_ACTION_ADD_HEADER] +
						   cur_stat.actions_stat[METRIC_ACTION_REWRITE_SUBJECT];
		gdouble new_ham = cur_stat.actions_stat[METRIC_ACTION_NOACTION];

		gsize cnt = MAX_AVG_TIME_SLOTS;
		float sum = rspamd_sum_floats(cur_stat.avg_time.avg_time, &cnt);

		rspamd_snprintf(proctitle, sizeof(proctitle),
						"main process; %.1f msg/sec, %.1f msg/sec spam, %.1f msg/sec ham; %.2fs avg processing time",
						rate,
						(new_spam - old_spam) / w->repeat,
						(new_ham - old_ham) / w->repeat,
						cnt > 0 ? sum / cnt : 0);
		setproctitle("%s", proctitle);
	}

	memcpy(&old_stat, &cur_stat, sizeof(cur_stat));
}

static void
rspamd_hup_handler(struct ev_loop *loop, ev_signal *w, int revents)
{
	struct rspamd_main *rspamd_main = (struct rspamd_main *) w->data;

	if (!rspamd_main->wanna_die) {
		msg_info_main("rspamd " RVERSION
					  " is requested to reload configuration");
		/* Detach existing workers and stop their heartbeats */
		g_hash_table_foreach(rspamd_main->workers, stop_srv_ev, rspamd_main);

		if (reread_config(rspamd_main)) {
			rspamd_check_core_limits(rspamd_main);
			/* Mark old workers */
			g_hash_table_foreach(rspamd_main->workers, mark_old_workers, NULL);
			msg_info_main("spawn workers with a new config");
			spawn_workers(rspamd_main, rspamd_main->event_loop);
			msg_info_main("workers spawning has been finished");
			/* Kill marked */
			msg_info_main("kill old workers");
			g_hash_table_foreach(rspamd_main->workers, kill_old_workers, NULL);
		}
		else {
			/* Reattach old workers */
			msg_info_main("restore old workers with a old config");
			g_hash_table_foreach(rspamd_main->workers, start_srv_ev, rspamd_main);
		}
	}
}

/* Called when a dead child has been found */

static void
rspamd_cld_handler(EV_P_ ev_child *w, struct rspamd_main *rspamd_main,
				   struct rspamd_worker *wrk)
{
	gboolean need_refork;
	static struct rspamd_control_command cmd;

	/* Turn off locking for logger */
	ev_child_stop(EV_A_ w);

	/* Remove dead child form children list */
	g_hash_table_remove(rspamd_main->workers, GSIZE_TO_POINTER(wrk->pid));
	g_hash_table_remove_all(wrk->control_events_pending);

	if (wrk->srv_pipe[0] != -1) {
		/* Ugly workaround */
		if (wrk->tmp_data) {
			g_free(wrk->tmp_data);
		}

		rspamd_detach_worker(rspamd_main, wrk);
	}

	if (wrk->control_pipe[0] != -1) {
		/* We also need to clean descriptors left */
		close(wrk->control_pipe[0]);
		close(wrk->srv_pipe[0]);
	}

	if (!rspamd_main->wanna_die) {
		cmd.type = RSPAMD_CONTROL_CHILD_CHANGE;
		cmd.cmd.child_change.what = rspamd_child_terminated;
		cmd.cmd.child_change.pid = wrk->pid;
		cmd.cmd.child_change.additional = w->rstatus;
		rspamd_control_broadcast_srv_cmd(rspamd_main, &cmd, wrk->pid);
	}

	need_refork = rspamd_check_termination_clause(wrk->srv, wrk, w->rstatus);

	if (need_refork) {
		/* Fork another worker in replace of dead one */
		msg_info_main("respawn process %s in lieu of terminated process with pid %P",
					  g_quark_to_string(wrk->type),
					  wrk->pid);
		rspamd_check_core_limits(rspamd_main);
		rspamd_fork_delayed(wrk->cf, wrk->index, rspamd_main);
	}
	else {
		msg_info_main("do not respawn process %s after found terminated process with pid %P",
					  g_quark_to_string(wrk->type),
					  wrk->pid);
	}

	REF_RELEASE(wrk->cf);
	g_hash_table_unref(wrk->control_events_pending);
	g_free(wrk);
}

/* Control socket handler */
static void
rspamd_control_handler(EV_P_ ev_io *w, int revents)
{
	struct rspamd_main *rspamd_main = (struct rspamd_main *) w->data;
	rspamd_inet_addr_t *addr = NULL;
	gint nfd;

	if ((nfd =
			 rspamd_accept_from_socket(w->fd, &addr, NULL, NULL)) == -1) {
		msg_warn_main("accept failed: %s", strerror(errno));
		return;
	}
	/* Check for EAGAIN */
	if (nfd == 0) {
		rspamd_inet_address_free(addr);
		return;
	}

	msg_info_main("accepted control connection from %s",
				  rspamd_inet_address_to_string(addr));

	rspamd_control_process_client_socket(rspamd_main, nfd, addr);
}

static guint
rspamd_spair_hash(gconstpointer p)
{
	return rspamd_cryptobox_fast_hash(p, PAIR_ID_LEN, rspamd_hash_seed());
}

static gboolean
rspamd_spair_equal(gconstpointer a, gconstpointer b)
{
	return memcmp(a, b, PAIR_ID_LEN) == 0;
}

static void
rspamd_spair_close(gpointer p)
{
	gint *fds = p;

	close(fds[0]);
	close(fds[1]);
	g_free(p);
}

const char *
get_cpu_architecture(void)
{
#if defined(__x86_64__) || defined(_M_X64)
	return "x86_64";
#elif defined(__i386) || defined(_M_IX86)
	return "x86";
#elif defined(__aarch64__)
	return "ARM64";
#elif defined(__arm__) || defined(_M_ARM)
	return "ARM";
#elif defined(__mips__)
	return "MIPS";
#elif defined(__powerpc__) || defined(_M_PPC)
	return "PowerPC";
#elif defined(__sparc__)
	return "SPARC";
#else
	return "Unknown";
#endif
}

static void
version(struct rspamd_main *rspamd_main)
{
#if defined(GIT_VERSION) && GIT_VERSION == 1
	rspamd_printf("Rspamd daemon version " RVERSION "-git." RID "\n\n");
#else
	rspamd_printf("Rspamd daemon version " RVERSION "\n\n");
#endif
	rspamd_printf("CPU architecture %s; features: %s\n",
				  get_cpu_architecture(),
				  rspamd_main->cfg->libs_ctx->crypto_ctx->cpu_extensions);
#ifdef WITH_HYPERSCAN
	rspamd_printf("Hyperscan enabled: TRUE\n");
#else
	rspamd_printf("Hyperscan enabled: FALSE\n");
#endif

#ifdef WITH_JEMALLOC
	rspamd_printf("Jemalloc enabled: TRUE\n");
#else
	rspamd_printf("Jemalloc enabled: FALSE\n");
#endif
#ifdef WITH_LUAJIT
	rspamd_printf("LuaJIT enabled: TRUE (LuaJIT version: %s)\n", LUAJIT_VERSION);
#else
	rspamd_printf("LuaJIT enabled: FALSE (Lua version: %s)\n", LUA_VERSION);
#endif
#ifndef __has_feature
#define __has_feature(x) 0
#endif
#if (defined(__has_feature) && __has_feature(address_sanitizer)) || defined(ADDRESS_SANITIZER)
	rspamd_printf("ASAN enabled: TRUE\n");
#else
	rspamd_printf("ASAN enabled: FALSE\n");
#endif
#ifdef HAVE_CBLAS
	rspamd_printf("BLAS enabled: TRUE\n");
#else
	rspamd_printf("BLAS enabled: FALSE\n");
#endif
#ifdef WITH_FASTTEXT
	rspamd_printf("Fasttext enabled: TRUE\n");
#else
	rspamd_printf("Fasttext enabled: FALSE\n");
#endif
}

static gboolean
rspamd_main_daemon(struct rspamd_main *rspamd_main)
{
	int fd;
	pid_t old_pid = getpid();

	switch (fork()) {
	case -1:
		msg_err_main("fork() failed: %s", strerror(errno));
		return FALSE;

	case 0:
		break;

	default:
		/* Old process */
		exit(0);
	}

	rspamd_log_on_fork(g_quark_from_static_string("main"),
					   rspamd_main->cfg,
					   rspamd_main->logger);

	if (setsid() == -1) {
		msg_err_main("setsid () failed: %s", strerror(errno));
		return FALSE;
	}

	umask(0);

	fd = open("/dev/null", O_RDWR);
	if (fd == -1) {
		msg_err_main("open(\"/dev/null\") failed: %s", strerror(errno));
		return FALSE;
	}

	if (dup2(fd, STDIN_FILENO) == -1) {
		msg_err_main("dup2(STDIN) failed: %s", strerror(errno));
		return FALSE;
	}

	if (dup2(fd, STDOUT_FILENO) == -1) {
		msg_err_main("dup2(STDOUT) failed: %s", strerror(errno));
		return FALSE;
	}

	if (fd > STDERR_FILENO) {
		if (close(fd) == -1) {
			msg_err_main("close() failed: %s", strerror(errno));
			return FALSE;
		}
	}

	msg_info_main("daemonized successfully; old pid %P, new pid %P; pid file: %s",
				  old_pid, getpid(),
				  rspamd_main->cfg->pid_file);

	return TRUE;
}

gint main(gint argc, gchar **argv, gchar **env)
{
	gint i, res = 0;
	struct sigaction signals, sigpipe_act;
	worker_t **pworker;
	GQuark type;
	rspamd_inet_addr_t *control_addr = NULL;
	struct ev_loop *event_loop;
	struct rspamd_main *rspamd_main;
	gboolean skip_pid = FALSE;
	sigset_t control_signals;

	/* Block special signals on loading */
	sigemptyset(&control_signals);
	sigaddset(&control_signals, SIGHUP);
	sigaddset(&control_signals, SIGUSR1);
	sigaddset(&control_signals, SIGUSR2);
	sigprocmask(SIG_BLOCK, &control_signals, NULL);

	rspamd_main = (struct rspamd_main *) g_malloc0(sizeof(struct rspamd_main));

	rspamd_main->server_pool = rspamd_mempool_new(rspamd_mempool_suggest_size(),
												  "main", 0);
	rspamd_main->stat = rspamd_mempool_alloc0_shared_(rspamd_main->server_pool,
													  sizeof(struct rspamd_stat),
													  RSPAMD_ALIGNOF(struct rspamd_stat),
													  G_STRLOC);
	/* Set all time slots to nan */
	for (i = 0; i < MAX_AVG_TIME_SLOTS; i++) {
		rspamd_main->stat->avg_time.avg_time[i] = NAN;
	}

	rspamd_main->cfg = rspamd_config_new(RSPAMD_CONFIG_INIT_DEFAULT);
	rspamd_main->spairs = g_hash_table_new_full(rspamd_spair_hash,
												rspamd_spair_equal, g_free, rspamd_spair_close);
	rspamd_main->start_mtx = rspamd_mempool_get_mutex(rspamd_main->server_pool);

	if (getenv("VALGRIND") != NULL) {
		valgrind_mode = TRUE;
	}

#ifndef HAVE_SETPROCTITLE
	init_title(rspamd_main->server_pool, argc, argv, env);
#endif

	rspamd_main->cfg->libs_ctx = rspamd_init_libs();
	memset(&signals, 0, sizeof(struct sigaction));

	read_cmd_line(&argc, &argv, rspamd_main->cfg);

	if (show_version) {
		version(rspamd_main);
		exit(EXIT_SUCCESS);
	}

	if (argc > 0) {
		/* Parse variables */
		for (i = 0; i < argc; i++) {
			if (strchr(argv[i], '=') != NULL) {
				gchar *k, *v, *t;

				k = g_strdup(argv[i]);
				t = strchr(k, '=');
				v = g_strdup(t + 1);
				*t = '\0';

				if (ucl_vars == NULL) {
					ucl_vars = g_hash_table_new_full(rspamd_strcase_hash,
													 rspamd_strcase_equal, g_free, g_free);
				}

				g_hash_table_insert(ucl_vars, k, v);
			}
		}
	}

	if (is_debug) {
		rspamd_main->cfg->log_level = G_LOG_LEVEL_DEBUG;
	}
	else {
		rspamd_main->cfg->log_level = G_LOG_LEVEL_MESSAGE;
	}

	type = g_quark_from_static_string("main");

	/* First set logger to console logger */
	rspamd_main->logger = rspamd_log_open_emergency(rspamd_main->server_pool, 0);
	g_assert(rspamd_main->logger != NULL);

	if (is_debug) {
		rspamd_log_set_log_level(rspamd_main->logger, G_LOG_LEVEL_DEBUG);
	}
	else {
		rspamd_log_set_log_level(rspamd_main->logger, G_LOG_LEVEL_MESSAGE);
	}

	g_log_set_default_handler(rspamd_glib_log_function, rspamd_main->logger);
	g_set_printerr_handler(rspamd_glib_printerr_function);

	detect_priv(rspamd_main);

	msg_notice_main("rspamd " RVERSION
					" is loading configuration, build id: " RID);

	pworker = &workers[0];
	while (*pworker) {
		/* Init string quarks */
		(void) g_quark_from_static_string((*pworker)->name);
		pworker++;
	}

	/* Init listen sockets hash */
	listen_sockets = g_hash_table_new(g_direct_hash, g_direct_equal);
	sqlite3_initialize();

	/* Load config */
	if (!load_rspamd_config(rspamd_main, rspamd_main->cfg, TRUE,
							RSPAMD_CONFIG_LOAD_ALL, FALSE)) {
		exit(EXIT_FAILURE);
	}

	/* Override pidfile from configuration by command line argument */
	if (rspamd_pidfile != NULL) {
		rspamd_main->cfg->pid_file = rspamd_pidfile;
	}

	/* Force debug log */
	if (is_debug) {
		rspamd_log_set_log_level(rspamd_main->logger, G_LOG_LEVEL_DEBUG);
	}

	/* Create rolling history */
	rspamd_main->history = rspamd_roll_history_new(rspamd_main->server_pool,
												   rspamd_main->cfg->history_rows, rspamd_main->cfg);

	msg_info_main("rspamd " RVERSION
				  " is starting, build id: " RID);
	rspamd_main->cfg->cfg_name = rspamd_mempool_strdup(
		rspamd_main->cfg->cfg_pool,
		rspamd_main->cfg->cfg_name);
	msg_info_main("cpu features: %s",
				  rspamd_main->cfg->libs_ctx->crypto_ctx->cpu_extensions);
	msg_info_main("cryptobox configuration: curve25519(libsodium), "
				  "chacha20(%s), poly1305(libsodium), siphash(libsodium), blake2(libsodium), base64(%s)",
				  rspamd_main->cfg->libs_ctx->crypto_ctx->chacha20_impl,
				  rspamd_main->cfg->libs_ctx->crypto_ctx->base64_impl);
	msg_info_main("libottery prf: %s", ottery_get_impl_name());

	/* Daemonize */
	if (!no_fork) {
		if (!rspamd_main_daemon(rspamd_main)) {
			exit(EXIT_FAILURE);
		}

		/* Close emergency logger */
		rspamd_log_close(rspamd_log_emergency_logger());
	}

	/* Write info */
	rspamd_main->pid = getpid();
	rspamd_main->type = type;

	rspamd_set_crash_handler(rspamd_main);

	/* Ignore SIGPIPE as we handle write errors manually */
	sigemptyset(&sigpipe_act.sa_mask);
	sigaddset(&sigpipe_act.sa_mask, SIGPIPE);
	sigpipe_act.sa_handler = SIG_IGN;
	sigpipe_act.sa_flags = 0;
	sigaction(SIGPIPE, &sigpipe_act, NULL);

	if (rspamd_main->cfg->pid_file == NULL) {
		msg_info_main("pid file is not specified, skipping writing it");
		skip_pid = TRUE;
	}
	else if (no_fork) {
		msg_info_main("skip writing pid in no-fork mode");
		skip_pid = TRUE;
	}
	else if (rspamd_write_pid(rspamd_main) == -1) {
		msg_err_main("cannot write pid file %s", rspamd_main->cfg->pid_file);
		exit(-errno);
	}

	sigprocmask(SIG_BLOCK, &signals.sa_mask, NULL);

	/* Set title */
	setproctitle("main process");

	/* Open control socket if needed */
	control_fd = -1;
	if (rspamd_main->cfg->control_socket_path) {
		if (!rspamd_parse_inet_address(&control_addr,
									   rspamd_main->cfg->control_socket_path,
									   strlen(rspamd_main->cfg->control_socket_path),
									   RSPAMD_INET_ADDRESS_PARSE_DEFAULT)) {
			msg_err_main("cannot parse inet address %s",
						 rspamd_main->cfg->control_socket_path);
		}
		else {
			control_fd = rspamd_inet_address_listen(control_addr, SOCK_STREAM,
													RSPAMD_INET_ADDRESS_LISTEN_ASYNC, -1);
			if (control_fd == -1) {
				msg_err_main("cannot open control socket at path: %s",
							 rspamd_main->cfg->control_socket_path);
			}
		}
	}

	/* Maybe read roll history */
	if (rspamd_main->cfg->history_file) {
		rspamd_roll_history_load(rspamd_main->history,
								 rspamd_main->cfg->history_file);
	}

	/* Init workers hash */
	rspamd_main->workers = g_hash_table_new(g_direct_hash, g_direct_equal);

	/* Unblock control signals */
	sigprocmask(SIG_UNBLOCK, &control_signals, NULL);
	/* Init event base */
	event_loop = ev_default_loop(rspamd_config_ev_backend_get(rspamd_main->cfg));
	rspamd_main->event_loop = event_loop;

	if (event_loop) {
		int loop_type = ev_backend(event_loop);
		gboolean effective_backend;
		const gchar *loop_str;

		loop_str =
			rspamd_config_ev_backend_to_string(loop_type, &effective_backend);

		if (!effective_backend) {
			msg_warn_main("event loop uses non-optimal backend: %s", loop_str);
		}
		else {
			msg_info_main("event loop initialised with backend: %s", loop_str);
		}
	}
	else {
		msg_err("cannot init event loop! exiting");
		exit(EXIT_FAILURE);
	}

	/* Unblock signals */
	sigemptyset(&signals.sa_mask);
	sigprocmask(SIG_SETMASK, &signals.sa_mask, NULL);

	/* Set events for signals */
	ev_signal_init(&rspamd_main->term_ev, rspamd_term_handler, SIGTERM);
	rspamd_main->term_ev.data = rspamd_main;
	ev_signal_start(event_loop, &rspamd_main->term_ev);

	ev_signal_init(&rspamd_main->int_ev, rspamd_term_handler, SIGINT);
	rspamd_main->int_ev.data = rspamd_main;
	ev_signal_start(event_loop, &rspamd_main->int_ev);

	ev_signal_init(&rspamd_main->hup_ev, rspamd_hup_handler, SIGHUP);
	rspamd_main->hup_ev.data = rspamd_main;
	ev_signal_start(event_loop, &rspamd_main->hup_ev);

	ev_signal_init(&rspamd_main->usr1_ev, rspamd_usr1_handler, SIGUSR1);
	rspamd_main->usr1_ev.data = rspamd_main;
	ev_signal_start(event_loop, &rspamd_main->usr1_ev);

	/* Update proctitle according to number of messages processed */
	static const ev_tstamp stat_update_time = 10.0;

	memset(&old_stat, 0, sizeof(old_stat));
	stat_ev.data = rspamd_main;
	ev_timer_init(&stat_ev, rspamd_stat_update_handler,
				  stat_update_time, stat_update_time);
	ev_timer_start(event_loop, &stat_ev);

	rspamd_check_core_limits(rspamd_main);
	rspamd_mempool_lock_mutex(rspamd_main->start_mtx);
	spawn_workers(rspamd_main, event_loop);
	rspamd_mempool_unlock_mutex(rspamd_main->start_mtx);

	rspamd_main->http_ctx = rspamd_http_context_create(rspamd_main->cfg,
													   event_loop, rspamd_main->cfg->ups_ctx);

	if (control_fd != -1) {
		msg_info_main("listening for control commands on %s",
					  rspamd_inet_address_to_string(control_addr));
		ev_io_init(&control_ev, rspamd_control_handler, control_fd, EV_READ);
		control_ev.data = rspamd_main;
		ev_io_start(event_loop, &control_ev);
	}

	ev_loop(event_loop, 0);

	/* Maybe save roll history */
	if (rspamd_main->cfg->history_file) {
		rspamd_roll_history_save(rspamd_main->history,
								 rspamd_main->cfg->history_file);
	}

	if (rspamd_main->cfg->cache) {
		rspamd_symcache_save(rspamd_main->cfg->cache);
	}

	msg_info_main("terminating...");

#ifdef WITH_HYPERSCAN
	rspamd_hyperscan_cleanup_maybe();
#endif
	REF_RELEASE(rspamd_main->cfg);
	rspamd_log_close(rspamd_main->logger);
	g_hash_table_unref(rspamd_main->spairs);
	g_hash_table_unref(rspamd_main->workers);
	rspamd_mempool_delete(rspamd_main->server_pool);

	if (!skip_pid) {
		rspamd_pidfile_close(rspamd_main->pfh);
	}

	rspamd_unset_crash_handler(rspamd_main);
	g_free(rspamd_main);
	ev_unref(event_loop);
	sqlite3_shutdown();

	if (control_addr) {
		rspamd_inet_address_free(control_addr);
	}

	return (res);
}
