aboutsummaryrefslogtreecommitdiffstats
path: root/util/startup.lua
blob: a627f11c6c5d7beb54ec1344c4a86416bd9fc7aa (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
-- Ignore the CFG_* variables
-- luacheck: ignore 113/CFG_CONFIGDIR 113/CFG_SOURCEDIR 113/CFG_DATADIR 113/CFG_PLUGINDIR
local startup = {};

local prosody = { events = require "prosody.util.events".new() };
local logger = require "prosody.util.logger";
local log = logger.init("startup");
local parse_args = require "prosody.util.argparse".parse;

local config = require "prosody.core.configmanager";
local config_warnings;

local dependencies = require "prosody.util.dependencies";

local original_logging_config;

local default_gc_params = {
	mode = "incremental";
	-- Incremental mode defaults
	threshold = 105, speed = 500;
	-- Generational mode defaults
	minor_threshold = 20, major_threshold = 50;
};

local arg_settigs = {
	prosody = {
		short_params = { D = "daemonize"; F = "no-daemonize", h = "help", ["?"] = "help" };
		value_params = { config = true };
	};
	prosodyctl = {
		short_params = { v = "verbose", h = "help", ["?"] = "help" };
		value_params = { config = true };
	};
}

function startup.parse_args(profile)
	local opts, err, where = parse_args(arg, arg_settigs[profile or prosody.process_type] or profile);
	if not opts then
		if err == "param-not-found" then
			print("Unknown command-line option: "..tostring(where));
			if prosody.process_type == "prosody" then
				print("Perhaps you meant to use prosodyctl instead?");
			end
		elseif err == "missing-value" then
			print("Expected a value to follow command-line option: "..where);
		end
		os.exit(1);
	end
	if prosody.process_type == "prosody" then
		if #arg > 0 then
			print("Unrecognized option: "..arg[1]);
			print("(Did you mean 'prosodyctl "..arg[1].."'?)");
			print("");
		end
		if opts.help or #arg > 0 then
			print("prosody [ -D | -F ] [ --config /path/to/prosody.cfg.lua ]");
			print("  -D, --daemonize       Run in the background")
			print("  -F, --no-daemonize    Run in the foreground")
			print("  --config FILE         Specify config file")
			os.exit(0);
		end
	end
	prosody.opts = opts;
end

function startup.read_config()
	local filenames = {};

	local filename;
	if prosody.opts.config then
		table.insert(filenames, prosody.opts.config);
		if CFG_CONFIGDIR then
			table.insert(filenames, CFG_CONFIGDIR.."/"..prosody.opts.config);
		end
	elseif os.getenv("PROSODY_CONFIG") then -- Passed by prosodyctl
			table.insert(filenames, os.getenv("PROSODY_CONFIG"));
	else
		table.insert(filenames, (CFG_CONFIGDIR or ".").."/prosody.cfg.lua");
	end
	for _,_filename in ipairs(filenames) do
		filename = _filename;
		local file = io.open(filename);
		if file then
			file:close();
			prosody.config_file = filename;
			prosody.paths.config = filename:match("^(.*)[\\/][^\\/]*$");
			CFG_CONFIGDIR = prosody.paths.config; -- luacheck: ignore 111
			break;
		end
	end
	prosody.config_file = filename
	local ok, level, err = config.load(filename);
	if not ok then
		print("\n");
		print("**************************");
		if level == "parser" then
			print("A problem occurred while reading the config file "..filename);
			print("");
			local err_line, err_message = tostring(err):match("%[string .-%]:(%d*): (.*)");
			if err:match("chunk has too many syntax levels$") then
				print("An Include statement in a config file is including an already-included");
				print("file and causing an infinite loop. An Include statement in a config file is...");
			else
				print("Error"..(err_line and (" on line "..err_line) or "")..": "..(err_message or tostring(err)));
			end
			print("");
		elseif level == "file" then
			print("Prosody was unable to find the configuration file.");
			print("We looked for: "..filename);
			print("A sample config file is included in the Prosody download called prosody.cfg.lua.dist");
			print("Copy or rename it to prosody.cfg.lua and edit as necessary.");
		end
		print("More help on configuring Prosody can be found at https://prosody.im/doc/configure");
		print("Good luck!");
		print("**************************");
		print("");
		os.exit(1);
	elseif err and #err > 0 then
		config_warnings = err;
	end
	prosody.config_loaded = true;
end

function startup.check_dependencies()
	if not dependencies.check_dependencies() then
		os.exit(1);
	end
end

-- luacheck: globals socket server

function startup.load_libraries()
	-- Load socket framework
	-- luacheck: ignore 111/server 111/socket
	require "prosody.util.import"
	socket = require "socket";
	server = require "prosody.net.server"
end

function startup.init_logging()
	-- Initialize logging
	local loggingmanager = require "prosody.core.loggingmanager"
	loggingmanager.reload_logging();
	prosody.events.add_handler("config-reloaded", function ()
		prosody.events.fire_event("reopen-log-files");
	end);
	prosody.events.add_handler("reopen-log-files", function ()
		loggingmanager.reload_logging();
		prosody.events.fire_event("logging-reloaded");
	end);
end

function startup.log_startup_warnings()
	dependencies.log_warnings();
	if config_warnings then
		for _, warning in ipairs(config_warnings) do
			log("warn", "Configuration warning: %s", warning);
		end
	end
end

function startup.sanity_check()
	for host, host_config in pairs(config.getconfig()) do
		if host ~= "*"
		and host_config.enabled ~= false
		and not host_config.component_module then
			return;
		end
	end
	log("error", "No enabled VirtualHost entries found in the config file.");
	log("error", "At least one active host is required for Prosody to function. Exiting...");
	os.exit(1);
end

function startup.sandbox_require()
	-- Replace require() with one that doesn't pollute _G, required
	-- for neat sandboxing of modules
	-- luacheck: ignore 113/getfenv 111/require
	local _realG = _G;
	local _real_require = require;
	local getfenv = getfenv or function (f)
		-- FIXME: This is a hack to replace getfenv() in Lua 5.2
		local name, env = debug.getupvalue(debug.getinfo(f or 1).func, 1);
		if name == "_ENV" then
			return env;
		end
	end
	function require(...) -- luacheck: ignore 121
		local curr_env = getfenv(2);
		local curr_env_mt = getmetatable(curr_env);
		local _realG_mt = getmetatable(_realG);
		if curr_env_mt and curr_env_mt.__index and not curr_env_mt.__newindex and _realG_mt then
			local old_newindex, old_index;
			old_newindex, _realG_mt.__newindex = _realG_mt.__newindex, curr_env;
			old_index, _realG_mt.__index = _realG_mt.__index, function (_G, k) -- luacheck: ignore 212/_G
				return rawget(curr_env, k);
			end;
			local ret = _real_require(...);
			_realG_mt.__newindex = old_newindex;
			_realG_mt.__index = old_index;
			return ret;
		end
		return _real_require(...);
	end
end

function startup.set_function_metatable()
	local mt = {};
	function mt.__index(f, upvalue)
		local i, name, value = 0;
		repeat
			i = i + 1;
			name, value = debug.getupvalue(f, i);
		until name == upvalue or name == nil;
		return value;
	end
	function mt.__newindex(f, upvalue, value)
		local i, name = 0;
		repeat
			i = i + 1;
			name = debug.getupvalue(f, i);
		until name == upvalue or name == nil;
		if name then
			debug.setupvalue(f, i, value);
		end
	end
	function mt.__tostring(f)
		local info = debug.getinfo(f, "Su");
		local n_params = info.nparams or 0;
		for i = 1, n_params do
			info[i] = debug.getlocal(f, i);
		end
		if info.isvararg then
			info[n_params+1] = "...";
		end
		return ("function @%s:%d(%s)"):format(info.short_src:match("[^\\/]*$"), info.linedefined, table.concat(info, ", "));
	end
	debug.setmetatable(function() end, mt);
end

function startup.detect_platform()
	prosody.platform = "unknown";
	if os.getenv("WINDIR") then
		prosody.platform = "windows";
	elseif package.config:sub(1,1) == "/" then
		prosody.platform = "posix";
	end
end

function startup.detect_installed()
	prosody.installed = nil;
	if CFG_SOURCEDIR and (prosody.platform == "windows" or CFG_SOURCEDIR:match("^/")) then
		prosody.installed = true;
	end
end

function startup.init_global_state()
	-- luacheck: ignore 121
	prosody.bare_sessions = {};
	prosody.full_sessions = {};
	prosody.hosts = {};

	-- COMPAT: These globals are deprecated
	-- luacheck: ignore 111/bare_sessions 111/full_sessions 111/hosts
	bare_sessions = prosody.bare_sessions;
	full_sessions = prosody.full_sessions;
	hosts = prosody.hosts;

	prosody.paths = { source = CFG_SOURCEDIR, config = CFG_CONFIGDIR or ".",
	                  plugins = CFG_PLUGINDIR or "plugins", data = "data" };

	prosody.arg = _G.arg;

	_G.log = logger.init("general");
	prosody.log = logger.init("general");

	startup.detect_platform();
	startup.detect_installed();
	_G.prosody = prosody;

	-- COMPAT Lua < 5.3
	if not math.type then
		require "prosody.util.mathcompat"
	end
end

function startup.setup_datadir()
	prosody.paths.data = config.get("*", "data_path") or CFG_DATADIR or "data";
end

function startup.setup_plugindir()
	local custom_plugin_paths = config.get("*", "plugin_paths");
	local path_sep = package.config:sub(3,3);
	if custom_plugin_paths then
		-- path1;path2;path3;defaultpath...
		-- luacheck: ignore 111
		CFG_PLUGINDIR = table.concat(custom_plugin_paths, path_sep)..path_sep..(CFG_PLUGINDIR or "plugins");
		prosody.paths.plugins = CFG_PLUGINDIR;
	end
end

function startup.setup_plugin_install_path()
	local installer_plugin_path = config.get("*", "installer_plugin_path") or "custom_plugins";
	local path_sep = package.config:sub(3,3);
	installer_plugin_path = config.resolve_relative_path(CFG_DATADIR or "data", installer_plugin_path);
	require"prosody.util.paths".complement_lua_path(installer_plugin_path);
	-- luacheck: ignore 111
	CFG_PLUGINDIR = installer_plugin_path..path_sep..(CFG_PLUGINDIR or "plugins");
	prosody.paths.installer = installer_plugin_path;
	prosody.paths.plugins = CFG_PLUGINDIR;
end

function startup.chdir()
	if prosody.installed then
		local lfs = require "lfs";
		-- Ensure paths are absolute, not relative to the working directory which we're about to change
		local cwd = lfs.currentdir();
		prosody.paths.source = config.resolve_relative_path(cwd, prosody.paths.source);
		prosody.paths.config = config.resolve_relative_path(cwd, prosody.paths.config);
		prosody.paths.data = config.resolve_relative_path(cwd, prosody.paths.data);
		-- Change working directory to data path.
		lfs.chdir(prosody.paths.data);
	end
end

function startup.add_global_prosody_functions()
	-- Function to reload the config file
	function prosody.reload_config()
		log("info", "Reloading configuration file");
		prosody.events.fire_event("reloading-config");
		local ok, level, err = config.load(prosody.config_file);
		if not ok then
			if level == "parser" then
				log("error", "There was an error parsing the configuration file: %s", err);
			elseif level == "file" then
				log("error", "Couldn't read the config file when trying to reload: %s", err);
			end
		else
			prosody.events.fire_event("config-reloaded", {
				filename = prosody.config_file,
				config = config.getconfig(),
			});
		end
		return ok, (err and tostring(level)..": "..tostring(err)) or nil;
	end

	-- Function to reopen logfiles
	function prosody.reopen_logfiles()
		log("info", "Re-opening log files");
		prosody.events.fire_event("reopen-log-files");
	end

	-- Function to initiate prosody shutdown
	function prosody.shutdown(reason, code)
		log("info", "Shutting down: %s", reason or "unknown reason");
		prosody.shutdown_reason = reason;
		prosody.shutdown_code = code;
		prosody.events.fire_event("server-stopping", {
			reason = reason;
			code = code;
		});
		prosody.main_thread:run(startup.shutdown);
	end
end

function startup.load_secondary_libraries()
	--- Load and initialise core modules
	require "prosody.util.xmppstream"
	require "prosody.core.stanza_router"
	require "prosody.core.statsmanager".metric("gauge", "prosody_info", "", "Prosody version", { "version" }):with_labels(prosody.version):set(1);
	require "prosody.core.hostmanager"
	require "prosody.core.portmanager"
	require "prosody.core.modulemanager"
	require "prosody.core.usermanager"
	require "prosody.core.rostermanager"
	require "prosody.core.sessionmanager"

	require "prosody.util.array"
	require "prosody.util.datetime"
	require "prosody.util.iterators"
	require "prosody.util.timer"
	require "prosody.util.helpers"

	pcall(require, "prosody.util.signal") -- Not on Windows

	-- Commented to protect us from
	-- the second kind of people
	--[[
	pcall(require, "remdebug.engine");
	if remdebug then remdebug.engine.start() end
	]]

	require "prosody.util.stanza"
	require "prosody.util.jid"

	prosody.features = require "prosody.core.features".available;
end

function startup.init_http_client()
	local http = require "prosody.net.http"
	local config_ssl = config.get("*", "ssl") or {}
	local https_client = config.get("*", "client_https_ssl")
	http.default.options.sslctx = require "prosody.core.certmanager".create_context("client_https port 0", "client",
		{ capath = config_ssl.capath, cafile = config_ssl.cafile, verify = "peer", }, https_client);
	http.default.options.use_dane = config.get("*", "use_dane")
end

function startup.init_promise()
	local promise = require "prosody.util.promise";

	local timer = require "prosody.util.timer";
	promise.set_nexttick(function(f) return timer.add_task(0, f); end);
end

function startup.init_async()
	local async = require "prosody.util.async";

	local timer = require "prosody.util.timer";
	async.set_nexttick(function(f) return timer.add_task(0, f); end);
	async.set_schedule_function(timer.add_task);
end

function startup.init_data_store()
	require "prosody.core.storagemanager";
end

local running_state = require "prosody.util.fsm".new({
	default_state = "uninitialized";
	transitions = {
		{ name = "begin_startup",   from = "uninitialized",           to = "starting" };
		{ name = "finish_startup",  from = "starting",                to = "running" };
		{ name = "begin_shutdown",  from = { "running", "starting" }, to = "stopping" };
		{ name = "finish_shutdown", from = "stopping",                to = "stopped" };
	};
	handlers = {
		transitioned = function (transition)
			prosody.state = transition.to;
		end;
	};
	state_handlers = {
		starting = function ()
			prosody.log("debug", "Firing server-starting event");
			prosody.events.fire_event("server-starting");
			prosody.start_time = os.time();
		end;
		running = function ()
			prosody.log("debug", "Startup complete, firing server-started");
			prosody.events.fire_event("server-started");
		end;
	};
}):init();

function startup.prepare_to_start()
	log("info", "Prosody is using the %s backend for connection handling", server.get_backend());

	-- Signal to modules that we are ready to start
	prosody.started = require "prosody.util.promise".new(function (resolve)
		if prosody.state == "running" then
			resolve();
		else
			prosody.events.add_handler("server-started", function ()
				resolve();
			end);
		end
	end):catch(function (err)
		prosody.log("error", "Prosody startup error: %s", err);
	end);

	running_state:begin_startup();
end

function startup.init_global_protection()
	-- Catch global accesses
	-- luacheck: ignore 212/t
	local locked_globals_mt = {
		__index = function (t, k) log("warn", "%s", debug.traceback("Attempt to read a non-existent global '"..tostring(k).."'", 2)); end;
		__newindex = function (t, k, v) error("Attempt to set a global: "..tostring(k).." = "..tostring(v), 2); end;
	};

	function prosody.unlock_globals()
		setmetatable(_G, nil);
	end

	function prosody.lock_globals()
		setmetatable(_G, locked_globals_mt);
	end

	-- And lock now...
	prosody.lock_globals();
end

function startup.read_version()
	-- Try to determine version
	local version_file = io.open((CFG_SOURCEDIR or ".").."/prosody.version");
	prosody.version = "unknown";
	if version_file then
		prosody.version = version_file:read("*a"):gsub("%s*$", "");
		version_file:close();
		if #prosody.version == 12 and prosody.version:match("^[a-f0-9]+$") then
			prosody.version = "hg:"..prosody.version;
		end
	else
		local hg = require"prosody.util.mercurial";
		local hgid = hg.check_id(CFG_SOURCEDIR or ".");
		if hgid then prosody.version = "hg:" .. hgid; end
	end
end

function startup.log_greeting()
	log("info", "Hello and welcome to Prosody version %s", prosody.version);
end

function startup.notify_started()
	running_state:finish_startup();
end

-- Override logging config (used by prosodyctl)
function startup.force_console_logging()
	original_logging_config = config.get("*", "log");
	local log_level = os.getenv("PROSODYCTL_LOG_LEVEL");
	if not log_level then
		if prosody.opts.verbose then
			log_level = "debug";
		elseif prosody.opts.quiet then
			log_level = "error";
		elseif prosody.opts.silent then
			config.set("*", "log", {}); -- ssssshush!
			return
		end
	end
	config.set("*", "log", { { levels = { min = log_level or "info" }, to = "console" } });
end

local function check_posix()
	if prosody.platform ~= "posix" then return end

	local want_pposix_version = "0.4.0";
	local have_pposix, pposix = pcall(require, "prosody.util.pposix");

	if pposix._VERSION ~= want_pposix_version then
		print(string.format("Unknown version (%s) of binary pposix module, expected %s",
			tostring(pposix._VERSION), want_pposix_version));
		os.exit(1);
	end
	if have_pposix and pposix then
		return pposix;
	end
end

function startup.switch_user()
	-- Switch away from root and into the prosody user --
	-- NOTE: This function is only used by prosodyctl.
	-- The prosody process is built with the assumption that
	-- it is already started as the appropriate user.

	local pposix = check_posix()
	if pposix then
		prosody.current_uid = pposix.getuid();
		local arg_root = prosody.opts.root;
		if prosody.current_uid == 0 and config.get("*", "run_as_root") ~= true and not arg_root then
			-- We haz root!
			local desired_user = config.get("*", "prosody_user") or "prosody";
			local desired_group = config.get("*", "prosody_group") or desired_user;
			local ok, err = pposix.setgid(desired_group);
			if ok then
				ok, err = pposix.initgroups(desired_user);
			end
			if ok then
				ok, err = pposix.setuid(desired_user);
				if ok then
					-- Yay!
					prosody.switched_user = true;
				end
			end
			if not prosody.switched_user then
				-- Boo!
				print("Warning: Couldn't switch to Prosody user/group '"..tostring(desired_user).."'/'"..tostring(desired_group).."': "..tostring(err));
			elseif prosody.config_file then
				-- Make sure the Prosody user can read the config
				local conf, err, errno = io.open(prosody.config_file); --luacheck: ignore 211/errno
				if conf then
					conf:close();
				else
					print("The config file is not readable by the '"..desired_user.."' user.");
					print("Prosody will not be able to read it.");
					print("Error was "..err);
					os.exit(1);
				end
			end
		end

		-- Set our umask to protect data files
		pposix.umask(config.get("*", "umask") or "027");
		pposix.setenv("HOME", prosody.paths.data);
		pposix.setenv("PROSODY_CONFIG", prosody.config_file);
	else
		print("Error: Unable to load pposix module. Check that Prosody is installed correctly.")
		print("For more help send the below error to us through https://prosody.im/discuss");
		print(tostring(pposix))
		os.exit(1);
	end
end

function startup.check_unwriteable()
	local function test_writeable(filename)
		local f, err = io.open(filename, "a");
		if not f then
			return false, err;
		end
		f:close();
		return true;
	end

	local unwriteable_files = {};
	if type(original_logging_config) == "string" and original_logging_config:sub(1,1) ~= "*" then
		local ok, err = test_writeable(original_logging_config);
		if not ok then
			table.insert(unwriteable_files, err);
		end
	elseif type(original_logging_config) == "table" then
		for _, rule in ipairs(original_logging_config) do
			if rule.filename then
				local ok, err = test_writeable(rule.filename);
				if not ok then
					table.insert(unwriteable_files, err);
				end
			end
		end
	end

	if #unwriteable_files > 0 then
		print("One of more of the Prosody log files are not");
		print("writeable, please correct the errors and try");
		print("starting prosodyctl again.");
		print("");
		for _, err in ipairs(unwriteable_files) do
			print(err);
		end
		print("");
		os.exit(1);
	end
end

function startup.init_gc()
	-- Apply garbage collector settings from the config file
	local gc = require "prosody.util.gc";
	local gc_settings = config.get("*", "gc") or { mode = default_gc_params.mode };

	local ok, err = gc.configure(gc_settings, default_gc_params);
	if not ok then
		log("error", "Failed to apply GC configuration: %s", err);
		return nil, err;
	end
	return true;
end

function startup.init_errors()
	require "prosody.util.error".configure(config.get("*", "error_library") or {});
end

function startup.make_host(hostname)
	return {
		type = "local",
		events = prosody.events,
		modules = {},
		sessions = {},
		users = require "prosody.core.usermanager".new_null_provider(hostname)
	};
end

function startup.make_dummy_hosts()
	-- When running under prosodyctl, we don't want to
	-- fully initialize the server, so we populate prosody.hosts
	-- with just enough things for most code to work correctly
	-- luacheck: ignore 122/hosts
	prosody.core_post_stanza = function () end; -- TODO: mod_router!

	for hostname in pairs(config.getconfig()) do
		prosody.hosts[hostname] = startup.make_host(hostname);
	end
end

function startup.posix_umask()
	if prosody.platform ~= "posix" then return end
	local pposix = require "prosody.util.pposix";
	local umask = config.get("*", "umask") or "027";
	pposix.umask(umask);
end

function startup.check_user()
	local pposix = check_posix();
	if not pposix then return end
	-- Don't even think about it!
	if pposix.getuid() == 0 and not config.get("*", "run_as_root") then
		print("Danger, Will Robinson! Prosody doesn't need to be run as root, so don't do it!");
		print("For more information on running Prosody as root, see https://prosody.im/doc/root");
		os.exit(1); -- Refusing to run as root
	end
end

local function remove_pidfile()
	local pidfile = prosody.pidfile;
	if prosody.pidfile_handle then
		prosody.pidfile_handle:close();
		os.remove(pidfile);
		prosody.pidfile, prosody.pidfile_handle = nil, nil;
	end
end

function startup.write_pidfile()
	local pposix = check_posix();
	if not pposix then return end
	local lfs = require "lfs";
	local stat = lfs.attributes;
	local pidfile = config.get("*", "pidfile") or nil;
	if not pidfile then return end
	pidfile = config.resolve_relative_path(prosody.paths.data, pidfile);
	local mode = stat(pidfile) and "r+" or "w+";
	local pidfile_handle, err = io.open(pidfile, mode);
	if not pidfile_handle then
		log("error", "Couldn't write pidfile at %s; %s", pidfile, err);
		os.exit(1);
	else
		prosody.pidfile = pidfile;
		if not lfs.lock(pidfile_handle, "w") then -- Exclusive lock
			local other_pid = pidfile_handle:read("*a");
			log("error", "Another Prosody instance seems to be running with PID %s, quitting", other_pid);
			prosody.pidfile_handle = nil;
			os.exit(1);
		else
			pidfile_handle:close();
			pidfile_handle, err = io.open(pidfile, "w+");
			if not pidfile_handle then
				log("error", "Couldn't write pidfile at %s; %s", pidfile, err);
				os.exit(1);
			else
				if lfs.lock(pidfile_handle, "w") then
					pidfile_handle:write(tostring(pposix.getpid()));
					pidfile_handle:flush();
					prosody.pidfile_handle = pidfile_handle;
				end
			end
		end
	end
	prosody.events.add_handler("server-stopped", remove_pidfile);
end

local function remove_log_sinks()
	local lm = require "prosody.core.loggingmanager";
	lm.register_sink_type("console", nil);
	lm.register_sink_type("stdout", nil);
	lm.reload_logging();
end

function startup.posix_daemonize()
	if not prosody.opts.daemonize then return end
	local pposix = check_posix();
	log("info", "Prosody is about to detach from the console, disabling further console output");
	remove_log_sinks();
	local ok, ret = pposix.daemonize();
	if not ok then
		log("error", "Failed to daemonize: %s", ret);
	elseif ret and ret > 0 then
		os.exit(0);
	else
		log("info", "Successfully daemonized to PID %d", pposix.getpid());
	end
end

function startup.hook_posix_signals()
	if prosody.platform ~= "posix" then return end
	local have_signal, signal = pcall(require, "prosody.util.signal");
	if not have_signal then
		log("warn", "Couldn't load signal library, won't respond to SIGTERM");
		return
	end
	signal.signal("SIGTERM", function()
		log("warn", "Received SIGTERM");
		prosody.main_thread:run(function()
			prosody.unlock_globals();
			prosody.shutdown("Received SIGTERM");
			prosody.lock_globals();
		end);
	end);

	signal.signal("SIGHUP", function()
		log("info", "Received SIGHUP");
		prosody.main_thread:run(function() prosody.reload_config(); end);
		-- this also reloads logging
	end);

	signal.signal("SIGINT", function()
		log("info", "Received SIGINT");
		prosody.main_thread:run(function()
			prosody.unlock_globals();
			prosody.shutdown("Received SIGINT");
			prosody.lock_globals();
		end);
	end);

	signal.signal("SIGUSR1", function()
		log("info", "Received SIGUSR1");
		prosody.events.fire_event("signal/SIGUSR1");
	end);

	signal.signal("SIGUSR2", function()
		log("info", "Received SIGUSR2");
		prosody.events.fire_event("signal/SIGUSR2");
	end);
end

function startup.systemd_notify()
	local notify_socket_name = os.getenv("NOTIFY_SOCKET");
	if not notify_socket_name then return end
	local have_unix, unix = pcall(require, "socket.unix");
	if not have_unix or type(unix) ~= "table" then
		log("error", "LuaSocket without UNIX socket support, can't notify systemd.")
		return os.exit(1);
	end
	log("debug", "Will notify on socket %q", notify_socket_name);
	notify_socket_name = notify_socket_name:gsub("^@", "\0");
	local notify_socket = unix.dgram();
	local ok, err = notify_socket:setpeername(notify_socket_name);
	if not ok then
		log("error", "Could not connect to systemd notification socket %q: %q", notify_socket_name, err);
		return os.exit(1);
	end
	local time = require "prosody.util.time";

	prosody.notify_socket = notify_socket;
	prosody.events.add_handler("server-started", function()
		notify_socket:send("READY=1");
	end);
	prosody.events.add_handler("config-reloading", function()
		notify_socket:send(string.format("RELOADING=1\nMONOTONIC_USEC=%d", math.floor(time.monotonic() * 1000000)));
	end);
	prosody.events.add_handler("config-reloaded", function()
		notify_socket:send("READY=1");
	end);
	prosody.events.add_handler("server-stopping", function()
		notify_socket:send("STOPPING=1");
	end);
end

function startup.cleanup()
	prosody.log("info", "Shutdown status: Cleaning up");
	prosody.events.fire_event("server-cleanup");
end

function startup.shutdown()
	running_state:begin_shutdown();

	prosody.log("info", "Shutting down...");
	startup.cleanup();
	prosody.events.fire_event("server-stopped");

	running_state:finish_shutdown();

	prosody.log("info", "Shutdown complete");
	prosody.log("debug", "Shutdown reason was: %s", prosody.shutdown_reason or "not specified");
	prosody.log("debug", "Exiting with status code: %d", prosody.shutdown_code or 0);
	server.setquitting(true);
end

function startup.exit()
	os.exit(prosody.shutdown_code, true);
end

-- prosodyctl only
function startup.prosodyctl()
	prosody.process_type = "prosodyctl";
	startup.parse_args();
	startup.init_global_state();
	startup.read_config();
	startup.force_console_logging();
	startup.init_logging();
	startup.init_gc();
	startup.init_errors();
	startup.setup_plugindir();
	startup.setup_plugin_install_path();
	startup.setup_datadir();
	startup.chdir();
	startup.read_version();
	startup.switch_user();
	startup.check_dependencies();
	startup.log_startup_warnings();
	startup.check_unwriteable();
	startup.load_libraries();
	startup.init_http_client();
	startup.make_dummy_hosts();
end

function startup.prosody()
	-- These actions are in a strict order, as many depend on
	-- previous steps to have already been performed
	prosody.process_type = "prosody";
	startup.parse_args();
	startup.init_global_state();
	startup.read_config();
	startup.check_user();
	startup.init_logging();
	startup.init_gc();
	startup.init_errors();
	startup.sanity_check();
	startup.sandbox_require();
	startup.set_function_metatable();
	startup.check_dependencies();
	startup.load_libraries();
	startup.setup_plugindir();
	startup.setup_plugin_install_path();
	startup.setup_datadir();
	startup.chdir();
	startup.add_global_prosody_functions();
	startup.read_version();
	startup.log_greeting();
	startup.log_startup_warnings();
	startup.load_secondary_libraries();
	startup.init_promise();
	startup.init_async();
	startup.init_http_client();
	startup.init_data_store();
	startup.init_global_protection();
	startup.posix_daemonize();
	startup.write_pidfile();
	startup.hook_posix_signals();
	startup.systemd_notify();
	startup.prepare_to_start();
	startup.notify_started();
end

return startup;