aboutsummaryrefslogtreecommitdiffstats
path: root/prosodyctl
blob: a7300973b3add24cfb3b819dd7046e6c0689eff8 (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
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
#!/usr/bin/env lua
-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--

-- prosodyctl - command-line controller for Prosody XMPP server

-- Will be modified by configure script if run --

CFG_SOURCEDIR=CFG_SOURCEDIR or os.getenv("PROSODY_SRCDIR");
CFG_CONFIGDIR=CFG_CONFIGDIR or os.getenv("PROSODY_CFGDIR");
CFG_PLUGINDIR=CFG_PLUGINDIR or os.getenv("PROSODY_PLUGINDIR");
CFG_DATADIR=CFG_DATADIR or os.getenv("PROSODY_DATADIR");

-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

local function is_relative(path)
	local path_sep = package.config:sub(1,1);
        return ((path_sep == "/" and path:sub(1,1) ~= "/")
	or (path_sep == "\\" and (path:sub(1,1) ~= "/" and path:sub(2,3) ~= ":\\")))
end

-- Tell Lua where to find our libraries
if CFG_SOURCEDIR then
	local function filter_relative_paths(path)
		if is_relative(path) then return ""; end
	end
	local function sanitise_paths(paths)
		return (paths:gsub("[^;]+;?", filter_relative_paths):gsub(";;+", ";"));
	end
	package.path = sanitise_paths(CFG_SOURCEDIR.."/?.lua;"..package.path);
	package.cpath = sanitise_paths(CFG_SOURCEDIR.."/?.so;"..package.cpath);
end

-- Substitute ~ with path to home directory in data path
if CFG_DATADIR then
	if os.getenv("HOME") then
		CFG_DATADIR = CFG_DATADIR:gsub("^~", os.getenv("HOME"));
	end
end

-----------

local startup = require "util.startup";
startup.prosodyctl();

-----------

local error_messages = setmetatable({
		["invalid-username"] = "The given username is invalid in a Jabber ID";
		["invalid-hostname"] = "The given hostname is invalid";
		["no-password"] = "No password was supplied";
		["no-such-user"] = "The given user does not exist on the server";
		["no-such-host"] = "The given hostname does not exist in the config";
		["unable-to-save-data"] = "Unable to store, perhaps you don't have permission?";
		["no-pidfile"] = "There is no 'pidfile' option in the configuration file, see https://prosody.im/doc/prosodyctl#pidfile for help";
		["invalid-pidfile"] = "The 'pidfile' option in the configuration file is not a string, see https://prosody.im/doc/prosodyctl#pidfile for help";
		["no-posix"] = "The mod_posix module is not enabled in the Prosody config file, see https://prosody.im/doc/prosodyctl for more info";
		["no-such-method"] = "This module has no commands";
		["not-running"] = "Prosody is not running";
		}, { __index = function (_,k) return "Error: "..(tostring(k):gsub("%-", " "):gsub("^.", string.upper)); end });

local configmanager = require "core.configmanager";
local modulemanager = require "core.modulemanager"
local prosodyctl = require "util.prosodyctl"
local socket = require "socket"
local dependencies = require "util.dependencies";

-----------------------

local show_message, show_warning = prosodyctl.show_message, prosodyctl.show_warning;
local show_usage = prosodyctl.show_usage;
local show_yesno = prosodyctl.show_yesno;
local show_prompt = prosodyctl.show_prompt;
local read_password = prosodyctl.read_password;

local jid_split = require "util.jid".prepped_split;

local prosodyctl_timeout = (configmanager.get("*", "prosodyctl_timeout") or 5) * 2;
-----------------------
local commands = {};
local command = table.remove(arg, 1);

function commands.enabled_plugins()
	for module in modulemanager.get_modules_for_host() do
		show_warning("%s", module)
	end
end

function commands.local_plugins()
	local directory = "./plugins"
    local i, t, popen = 0, {}, io.popen
    local pfile = popen('ls -a "'..directory..'"')
    for filename in pfile:lines() do
		if filename == "." or filename == ".." then
			i = i + 1
		else
			i = i + 1
			t[i] = filename
			show_warning("%s", t[i])
        end
    end
    pfile:close()
end

function commands.adduser(arg)
	if not arg[1] or arg[1] == "--help" then
		show_usage([[adduser JID]], [[Create the specified user account in Prosody]]);
		return 1;
	end
	local user, host = jid_split(arg[1]);
	if not user and host then
		show_message [[Failed to understand JID, please supply the JID you want to create]]
		show_usage [[adduser user@host]]
		return 1;
	end

	if not host then
		show_message [[Please specify a JID, including a host. e.g. alice@example.com]];
		return 1;
	end

	if not prosody.hosts[host] then
		show_warning("The host '%s' is not listed in the configuration file (or is not enabled).", host)
		show_warning("The user will not be able to log in until this is changed.");
		prosody.hosts[host] = startup.make_host(host); --luacheck: ignore 122
	end

	if prosodyctl.user_exists{ user = user, host = host } then
		show_message [[That user already exists]];
		return 1;
	end

	local password = read_password();
	if not password then return 1; end

	local ok, msg = prosodyctl.adduser { user = user, host = host, password = password };

	if ok then return 0; end

	show_message(msg)
	return 1;
end

function commands.passwd(arg)
	if not arg[1] or arg[1] == "--help" then
		show_usage([[passwd JID]], [[Set the password for the specified user account in Prosody]]);
		return 1;
	end
	local user, host = jid_split(arg[1]);
	if not user and host then
		show_message [[Failed to understand JID, please supply the JID you want to set the password for]]
		show_usage [[passwd user@host]]
		return 1;
	end

	if not host then
		show_message [[Please specify a JID, including a host. e.g. alice@example.com]];
		return 1;
	end

	if not prosody.hosts[host] then
		show_warning("The host '%s' is not listed in the configuration file (or is not enabled).", host)
		show_warning("The user will not be able to log in until this is changed.");
		prosody.hosts[host] = startup.make_host(host); --luacheck: ignore 122
	end

	if not prosodyctl.user_exists { user = user, host = host } then
		show_message [[That user does not exist, use prosodyctl adduser to create a new user]]
		return 1;
	end

	local password = read_password();
	if not password then return 1; end

	local ok, msg = prosodyctl.passwd { user = user, host = host, password = password };

	if ok then return 0; end

	show_message(error_messages[msg])
	return 1;
end

function commands.deluser(arg)
	if not arg[1] or arg[1] == "--help" then
		show_usage([[deluser JID]], [[Permanently remove the specified user account from Prosody]]);
		return 1;
	end
	local user, host = jid_split(arg[1]);
	if not user and host then
		show_message [[Failed to understand JID, please supply the JID to the user account you want to delete]]
		show_usage [[deluser user@host]]
		return 1;
	end

	if not host then
		show_message [[Please specify a JID, including a host. e.g. alice@example.com]];
		return 1;
	end

	if not prosody.hosts[host] then
		show_warning("The host '%s' is not listed in the configuration file (or is not enabled).", host)
		prosody.hosts[host] = startup.make_host(host); --luacheck: ignore 122
	end

	if not prosodyctl.user_exists { user = user, host = host } then
		show_message [[That user does not exist on this server]]
		return 1;
	end

	local ok, msg = prosodyctl.deluser { user = user, host = host };

	if ok then return 0; end

	show_message(error_messages[msg])
	return 1;
end

function commands.start(arg)
	if arg[1] == "--help" then
		show_usage([[start]], [[Start Prosody]]);
		return 1;
	end
	local ok, ret = prosodyctl.isrunning();
	if not ok then
		show_message(error_messages[ret]);
		return 1;
	end

	if ret then
		--luacheck: ignore 421/ret
		local ok, ret = prosodyctl.getpid();
		if not ok then
			show_message("Couldn't get running Prosody's PID");
			show_message(error_messages[ret]);
			return 1;
		end
		show_message("Prosody is already running with PID %s", ret or "(unknown)");
		return 1;
	end

	--luacheck: ignore 411/ret
	local ok, ret = prosodyctl.start(prosody.paths.source, arg[-1]);
	if ok then
		local daemonize = configmanager.get("*", "daemonize");
		if daemonize == nil then
			daemonize = prosody.installed;
		end
		if daemonize then
			local i=1;
			while true do
				local ok, running = prosodyctl.isrunning();
				if ok and running then
					break;
				elseif i == 5 then
					show_message("Still waiting...");
				elseif i >= prosodyctl_timeout then
					show_message("Prosody is still not running. Please give it some time or check your log files for errors.");
					return 2;
				end
				socket.sleep(0.5);
				i = i + 1;
			end
			show_message("Started");
		end
		return 0;
	end

	show_message("Failed to start Prosody");
	show_message(error_messages[ret])
	return 1;
end

function commands.status(arg)
	if arg[1] == "--help" then
		show_usage([[status]], [[Reports the running status of Prosody]]);
		return 1;
	end

	local ok, ret = prosodyctl.isrunning();
	if not ok then
		show_message(error_messages[ret]);
		return 1;
	end

	if ret then
		--luacheck: ignore 421/ret
		local ok, ret = prosodyctl.getpid();
		if not ok then
			show_message("Couldn't get running Prosody's PID");
			show_message(error_messages[ret]);
			return 1;
		end
		show_message("Prosody is running with PID %s", ret or "(unknown)");
		return 0;
	else
		show_message("Prosody is not running");
		if not prosody.switched_user and prosody.current_uid ~= 0 then
			print("\nNote:")
			print(" You will also see this if prosodyctl is not running under");
			print(" the same user account as Prosody. Try running as root (e.g. ");
			print(" with 'sudo' in front) to gain access to Prosody's real status.");
		end
		return 2
	end
end

function commands.stop(arg)
	if arg[1] == "--help" then
		show_usage([[stop]], [[Stop a running Prosody server]]);
		return 1;
	end

	if not prosodyctl.isrunning() then
		show_message("Prosody is not running");
		return 1;
	end

	local ok, ret = prosodyctl.stop();
	if ok then
		local i=1;
		while true do
			local ok, running = prosodyctl.isrunning();
			if ok and not running then
				break;
			elseif i == 5 then
				show_message("Still waiting...");
			elseif i >= prosodyctl_timeout then
				show_message("Prosody is still running. Please give it some time or check your log files for errors.");
				return 2;
			end
			socket.sleep(0.5);
			i = i + 1;
		end
		show_message("Stopped");
		return 0;
	end

	show_message(error_messages[ret]);
	return 1;
end

function commands.restart(arg)
	if arg[1] == "--help" then
		show_usage([[restart]], [[Restart a running Prosody server]]);
		return 1;
	end

	commands.stop(arg);
	return commands.start(arg);
end

function commands.about(arg)
	if arg[1] == "--help" then
		show_usage([[about]], [[Show information about this Prosody installation]]);
		return 1;
	end

	local pwd = ".";
	local array = require "util.array";
	local keys = require "util.iterators".keys;
	local hg = require"util.mercurial";
	local relpath = configmanager.resolve_relative_path;

	print("Prosody "..(prosody.version or "(unknown version)"));
	print("");
	print("# Prosody directories");
	print("Data directory:     "..relpath(pwd, prosody.paths.data));
	print("Config directory:   "..relpath(pwd, prosody.paths.config or "."));
	print("Source directory:   "..relpath(pwd, prosody.paths.source or "."));
	print("Plugin directories:")
	print("  "..(prosody.paths.plugins:gsub("([^;]+);?", function(path)
			path = configmanager.resolve_relative_path(pwd, path);
			local hgid, hgrepo = hg.check_id(path);
			if not hgid and hgrepo then
				return path.." - "..hgrepo .."!\n  ";
			end
			-- 010452cfaf53 is the first commit in the prosody-modules repository
			hgrepo = hgrepo == "010452cfaf53" and "prosody-modules";
			return path..(hgid and " - "..(hgrepo or "HG").." rev: "..hgid or "")
				.."\n  ";
		end)));
	print("");
	local have_pposix, pposix = pcall(require, "util.pposix");
	if have_pposix and pposix.uname then
		print("# Operating system");
		local uname, err = pposix.uname();
		print(uname and uname.sysname .. " " .. uname.release or "Unknown POSIX", err or "");
		print("");
	end
	print("# Lua environment");
	print("Lua version:             ", _G._VERSION);
	print("");
	print("Lua module search paths:");
	for path in package.path:gmatch("[^;]+") do
		print("  "..path);
	end
	print("");
	print("Lua C module search paths:");
	for path in package.cpath:gmatch("[^;]+") do
		print("  "..path);
	end
	print("");
	local luarocks_status = "Not installed"
	if pcall(require, "luarocks.loader") then
		luarocks_status = "Installed (2.x+)";
		if package.loaded["luarocks.cfg"] then
			luarocks_status = "Installed ("..(package.loaded["luarocks.cfg"].program_version or "2.x+")..")";
		end
	elseif pcall(require, "luarocks.require") then
		luarocks_status = "Installed (1.x)";
	end
	print("LuaRocks:        ", luarocks_status);
	print("");
	print("# Network");
	print("");
	print("Backend: "..require "net.server".get_backend());
	print("");
	print("# Lua module versions");
	local module_versions, longest_name = {}, 8;
	local luaevent =dependencies.softreq"luaevent";
	dependencies.softreq"ssl";
	dependencies.softreq"DBI";
	for name, module in pairs(package.loaded) do
		if type(module) == "table" and rawget(module, "_VERSION")
		and name ~= "_G" and not name:match("%.") then
			if #name > longest_name then
				longest_name = #name;
			end
			module_versions[name] = module._VERSION;
		end
	end
	if luaevent then
		module_versions["libevent"] = luaevent.core.libevent_version();
	end
	local sorted_keys = array.collect(keys(module_versions)):sort();
	for _, name in ipairs(sorted_keys) do
		print(name..":"..string.rep(" ", longest_name-#name), module_versions[name]);
	end
	print("");
end

function commands.reload(arg)
	if arg[1] == "--help" then
		show_usage([[reload]], [[Reload Prosody's configuration and re-open log files]]);
		return 1;
	end

	if not prosodyctl.isrunning() then
		show_message("Prosody is not running");
		return 1;
	end

	local ok, ret = prosodyctl.reload();
	if ok then

		show_message("Prosody log files re-opened and config file reloaded. You may need to reload modules for some changes to take effect.");
		return 0;
	end

	show_message(error_messages[ret]);
	return 1;
end
-- ejabberdctl compatibility

local unpack = table.unpack or unpack; -- luacheck: ignore 113

function commands.register(arg)
	local user, host, password = unpack(arg);
	if (not (user and host)) or arg[1] == "--help" then
		if user ~= "--help" then
			if not user then
				show_message [[No username specified]]
			elseif not host then
				show_message [[Please specify which host you want to register the user on]];
			end
		end
		show_usage("register USER HOST [PASSWORD]", "Register a user on the server, with the given password");
		return 1;
	end
	if not password then
		password = read_password();
		if not password then
			show_message [[Unable to register user with no password]];
			return 1;
		end
	end

	local ok, msg = prosodyctl.adduser { user = user, host = host, password = password };

	if ok then return 0; end

	show_message(error_messages[msg])
	return 1;
end

function commands.unregister(arg)
	local user, host = unpack(arg);
	if (not (user and host)) or arg[1] == "--help" then
		if user ~= "--help" then
			if not user then
				show_message [[No username specified]]
			elseif not host then
				show_message [[Please specify which host you want to unregister the user from]];
			end
		end
		show_usage("unregister USER HOST [PASSWORD]", "Permanently remove a user account from the server");
		return 1;
	end

	local ok, msg = prosodyctl.deluser { user = user, host = host };

	if ok then return 0; end

	show_message(error_messages[msg])
	return 1;
end

local openssl;
local lfs;

local cert_commands = {};

-- If a file already exists, ask if the user wants to use it or replace it
-- Backups the old file if replaced
local function use_existing(filename)
	local attrs = lfs.attributes(filename);
	if attrs then
		if show_yesno(filename .. " exists, do you want to replace it? [y/n]") then
			local backup = filename..".bkp~"..os.date("%FT%T", attrs.change);
			os.rename(filename, backup);
			show_message(filename.." backed up to "..backup);
		else
			-- Use the existing file
			return true;
		end
	end
end

local have_pposix, pposix = pcall(require, "util.pposix");
local cert_basedir = prosody.paths.data == "." and "./certs" or prosody.paths.data;
if have_pposix and pposix.getuid() == 0 then
	-- FIXME should be enough to check if this directory is writable
	local cert_dir = configmanager.get("*", "certificates") or "certs";
	cert_basedir = configmanager.resolve_relative_path(prosody.paths.config, cert_dir);
end

function cert_commands.config(arg)
	if #arg >= 1 and arg[1] ~= "--help" then
		local conf_filename = cert_basedir .. "/" .. arg[1] .. ".cnf";
		if use_existing(conf_filename) then
			return nil, conf_filename;
		end
		local distinguished_name;
		if arg[#arg]:find("^/") then
			distinguished_name = table.remove(arg);
		end
		local conf = openssl.config.new();
		conf:from_prosody(prosody.hosts, configmanager, arg);
		if distinguished_name then
			local dn = {};
			for k, v in distinguished_name:gmatch("/([^=/]+)=([^/]+)") do
				table.insert(dn, k);
				dn[k] = v;
			end
			conf.distinguished_name = dn;
		else
			show_message("Please provide details to include in the certificate config file.");
			show_message("Leave the field empty to use the default value or '.' to exclude the field.")
			for _, k in ipairs(openssl._DN_order) do
				local v = conf.distinguished_name[k];
				if v then
					local nv = nil;
					if k == "commonName" then
						v = arg[1]
					elseif k == "emailAddress" then
						v = "xmpp@" .. arg[1];
					elseif k == "countryName" then
						local tld = arg[1]:match"%.([a-z]+)$";
						if tld and #tld == 2 and tld ~= "uk" then
							v = tld:upper();
						end
					end
					nv = show_prompt(("%s (%s):"):format(k, nv or v));
					nv = (not nv or nv == "") and v or nv;
					if nv:find"[\192-\252][\128-\191]+" then
						conf.req.string_mask = "utf8only"
					end
					conf.distinguished_name[k] = nv ~= "." and nv or nil;
				end
			end
		end
		local conf_file, err = io.open(conf_filename, "w");
		if not conf_file then
			show_warning("Could not open OpenSSL config file for writing");
			show_warning(err);
			os.exit(1);
		end
		conf_file:write(conf:serialize());
		conf_file:close();
		print("");
		show_message("Config written to " .. conf_filename);
		return nil, conf_filename;
	else
		show_usage("cert config HOSTNAME [HOSTNAME+]", "Builds a certificate config file covering the supplied hostname(s)")
	end
end

function cert_commands.key(arg)
	if #arg >= 1 and arg[1] ~= "--help" then
		local key_filename = cert_basedir .. "/" .. arg[1] .. ".key";
		if use_existing(key_filename) then
			return nil, key_filename;
		end
		os.remove(key_filename); -- This file, if it exists is unlikely to have write permissions
		local key_size = tonumber(arg[2] or show_prompt("Choose key size (2048):") or 2048);
		local old_umask = pposix.umask("0377");
		if openssl.genrsa{out=key_filename, key_size} then
			os.execute(("chmod 400 '%s'"):format(key_filename));
			show_message("Key written to ".. key_filename);
			pposix.umask(old_umask);
			return nil, key_filename;
		end
		show_message("There was a problem, see OpenSSL output");
	else
		show_usage("cert key HOSTNAME <bits>", "Generates a RSA key named HOSTNAME.key\n "
		.."Prompts for a key size if none given")
	end
end

function cert_commands.request(arg)
	if #arg >= 1 and arg[1] ~= "--help" then
		local req_filename = cert_basedir .. "/" .. arg[1] .. ".req";
		if use_existing(req_filename) then
			return nil, req_filename;
		end
		local _, key_filename = cert_commands.key({arg[1]});
		local _, conf_filename = cert_commands.config(arg);
		if openssl.req{new=true, key=key_filename, utf8=true, sha256=true, config=conf_filename, out=req_filename} then
			show_message("Certificate request written to ".. req_filename);
		else
			show_message("There was a problem, see OpenSSL output");
		end
	else
		show_usage("cert request HOSTNAME [HOSTNAME+]", "Generates a certificate request for the supplied hostname(s)")
	end
end

function cert_commands.generate(arg)
	if #arg >= 1 and arg[1] ~= "--help" then
		local cert_filename = cert_basedir .. "/" .. arg[1] .. ".crt";
		if use_existing(cert_filename) then
			return nil, cert_filename;
		end
		local _, key_filename = cert_commands.key({arg[1]});
		local _, conf_filename = cert_commands.config(arg);
		if key_filename and conf_filename and cert_filename
			and openssl.req{new=true, x509=true, nodes=true, key=key_filename,
				days=365, sha256=true, utf8=true, config=conf_filename, out=cert_filename} then
			show_message("Certificate written to ".. cert_filename);
			print();
		else
			show_message("There was a problem, see OpenSSL output");
		end
	else
		show_usage("cert generate HOSTNAME [HOSTNAME+]", "Generates a self-signed certificate for the current hostname(s)")
	end
end

local function sh_esc(s)
	return "'" .. s:gsub("'", "'\\''") .. "'";
end

local function copy(from, to, umask, owner, group)
	local old_umask = umask and pposix.umask(umask);
	local attrs = lfs.attributes(to);
	if attrs then -- Move old file out of the way
		local backup = to..".bkp~"..os.date("%FT%T", attrs.change);
		os.rename(to, backup);
	end
	-- FIXME friendlier error handling, maybe move above backup back?
	local input = assert(io.open(from));
	local output = assert(io.open(to, "w"));
	local data = input:read(2^11);
	while data and output:write(data) do
		data = input:read(2^11);
	end
	assert(input:close());
	assert(output:close());
	if not prosody.installed then
		-- FIXME this is possibly specific to GNU chown
		os.execute(("chown -c --reference=%s %s"):format(sh_esc(cert_basedir), sh_esc(to)));
	elseif owner and group then
		local ok = os.execute(("chown %s:%s %s"):format(sh_esc(owner), sh_esc(group), sh_esc(to)));
		assert(ok == true or ok == 0, "Failed to change ownership of "..to);
	end
	if old_umask then pposix.umask(old_umask); end
	return true;
end

function cert_commands.import(arg)
	local hostnames = {};
	-- Move hostname arguments out of arg, the rest should be a list of paths
	while arg[1] and prosody.hosts[ arg[1] ] do
		table.insert(hostnames, table.remove(arg, 1));
	end
	if hostnames[1] == nil then
		local domains = os.getenv"RENEWED_DOMAINS"; -- Set if invoked via certbot
		if domains then
			for host in domains:gmatch("%S+") do
				table.insert(hostnames, host);
			end
		else
			for host in pairs(prosody.hosts) do
				if host ~= "*" and configmanager.get(host, "enabled") ~= false then
					table.insert(hostnames, host);
				end
			end
		end
	end
	if not arg[1] or arg[1] == "--help" then -- Probably forgot the path
		show_usage("cert import [HOSTNAME+] /path/to/certs [/other/paths/]+",
			"Copies certificates to "..cert_basedir);
		return 1;
	end
	local owner, group;
	if pposix.getuid() == 0 then -- We need root to change ownership
		owner = configmanager.get("*", "prosody_user") or "prosody";
		group = configmanager.get("*", "prosody_group") or owner;
	end
	local cm = require "core.certmanager";
	local imported = {};
	for _, host in ipairs(hostnames) do
		for _, dir in ipairs(arg) do
			local paths = cm.find_cert(dir, host);
			if paths then
				copy(paths.certificate, cert_basedir .. "/" .. host .. ".crt", nil, owner, group);
				copy(paths.key, cert_basedir .. "/" .. host .. ".key", "0377", owner, group);
				table.insert(imported, host);
			else
				-- TODO Say where we looked
				show_warning("No certificate for host "..host.." found :(");
			end
			-- TODO Additional checks
			-- Certificate names matches the hostname
			-- Private key matches public key in certificate
		end
	end
	if imported[1] then
		show_message("Imported certificate and key for hosts "..table.concat(imported, ", "));
		local ok, err = prosodyctl.reload();
		if not ok and err ~= "not-running" then
			show_message(error_messages[err]);
		end
	else
		show_warning("No certificates imported :(");
		return 1;
	end
end

function commands.cert(arg)
	if #arg >= 1 and arg[1] ~= "--help" then
		openssl = require "util.openssl";
		lfs = require "lfs";
		local cert_dir_attrs = lfs.attributes(cert_basedir);
		if not cert_dir_attrs then
			show_warning("The directory "..cert_basedir.." does not exist");
			return 1; -- TODO Should we create it?
		end
		local uid = pposix.getuid();
		if uid ~= 0 and uid ~= cert_dir_attrs.uid then
			show_warning("The directory "..cert_basedir.." is not owned by the current user, won't be able to write files to it");
			return 1;
		elseif not cert_dir_attrs.permissions then -- COMPAT with LuaFilesystem < 1.6.2 (hey CentOS!)
			show_message("Unable to check permissions on "..cert_basedir.." (LuaFilesystem 1.6.2+ required)");
			show_message("Please confirm that Prosody (and only Prosody) can write to this directory)");
		elseif cert_dir_attrs.permissions:match("^%.w..%-..%-.$") then
			show_warning("The directory "..cert_basedir.." not only writable by its owner");
			return 1;
		end
		local subcmd = table.remove(arg, 1);
		if type(cert_commands[subcmd]) == "function" then
			if subcmd ~= "import" then -- hostnames are optional for import
				if not arg[1] then
					show_message"You need to supply at least one hostname"
					arg = { "--help" };
				end
				if arg[1] ~= "--help" and not prosody.hosts[arg[1]] then
					show_message(error_messages["no-such-host"]);
					return 1;
				end
			end
			return cert_commands[subcmd](arg);
		elseif subcmd == "check" then
			return commands.check({"certs"});
		end
	end
	show_usage("cert config|request|generate|key|import", "Helpers for generating X.509 certificates and keys.")
	for _, cmd in pairs(cert_commands) do
		print()
		cmd{ "--help" }
	end
end

function commands.check(arg)
	if arg[1] == "--help" then
		show_usage([[check]], [[Perform basic checks on your Prosody installation]]);
		return 1;
	end
	local what = table.remove(arg, 1);
	local set = require "util.set";
	local it = require "util.iterators";
	local ok = true;
	local function disabled_hosts(host, conf) return host ~= "*" and conf.enabled ~= false; end
	local function enabled_hosts() return it.filter(disabled_hosts, pairs(configmanager.getconfig())); end
	if not (what == nil or what == "disabled" or what == "config" or what == "dns" or what == "certs") then
		show_warning("Don't know how to check '%s'. Try one of 'config', 'dns', 'certs' or 'disabled'.", what);
		return 1;
	end
	if not what or what == "disabled" then
		local disabled_hosts_set = set.new();
		for host, host_options in it.filter("*", pairs(configmanager.getconfig())) do
			if host_options.enabled == false then
				disabled_hosts_set:add(host);
			end
		end
		if not disabled_hosts_set:empty() then
			local msg = "Checks will be skipped for these disabled hosts: %s";
			if what then msg = "These hosts are disabled: %s"; end
			show_warning(msg, tostring(disabled_hosts_set));
			if what then return 0; end
			print""
		end
	end
	if not what or what == "config" then
		print("Checking config...");
		local deprecated = set.new({
			"bosh_ports", "disallow_s2s", "no_daemonize", "anonymous_login", "require_encryption",
			"vcard_compatibility", "cross_domain_bosh", "cross_domain_websocket"
		});
		local known_global_options = set.new({
			"pidfile", "log", "plugin_paths", "prosody_user", "prosody_group", "daemonize",
			"umask", "prosodyctl_timeout", "use_ipv6", "use_libevent", "network_settings",
			"network_backend", "http_default_host",
			"statistics_interval", "statistics", "statistics_config",
		});
		local config = configmanager.getconfig();
		-- Check that we have any global options (caused by putting a host at the top)
		if it.count(it.filter("log", pairs(config["*"]))) == 0 then
			ok = false;
			print("");
			print("    No global options defined. Perhaps you have put a host definition at the top")
			print("    of the config file? They should be at the bottom, see https://prosody.im/doc/configure#overview");
		end
		if it.count(enabled_hosts()) == 0 then
			ok = false;
			print("");
			if it.count(it.filter("*", pairs(config))) == 0 then
				print("    No hosts are defined, please add at least one VirtualHost section")
			elseif config["*"]["enabled"] == false then
				print("    No hosts are enabled. Remove enabled = false from the global section or put enabled = true under at least one VirtualHost section")
			else
				print("    All hosts are disabled. Remove enabled = false from at least one VirtualHost section")
			end
		end
		if not config["*"].modules_enabled then
			print("    No global modules_enabled is set?");
			local suggested_global_modules;
			for host, options in enabled_hosts() do --luacheck: ignore 213/host
				if not options.component_module and options.modules_enabled then
					suggested_global_modules = set.intersection(suggested_global_modules or set.new(options.modules_enabled), set.new(options.modules_enabled));
				end
			end
			if suggested_global_modules and not suggested_global_modules:empty() then
				print("    Consider moving these modules into modules_enabled in the global section:")
				print("    "..tostring(suggested_global_modules / function (x) return ("%q"):format(x) end));
			end
			print();
		end

		do -- Check for modules enabled both normally and as components
			local modules = set.new(config["*"]["modules_enabled"]);
			for host, options in enabled_hosts() do
				local component_module = options.component_module;
				if component_module and modules:contains(component_module) then
					print(("    mod_%s is enabled both in modules_enabled and as Component %q %q"):format(component_module, host, component_module));
					print("    This means the service is enabled on all VirtualHosts as well as the Component.");
					print("    Are you sure this what you want? It may cause unexpected behaviour.");
				end
			end
		end

		-- Check for global options under hosts
		local global_options = set.new(it.to_array(it.keys(config["*"])));
		local deprecated_global_options = set.intersection(global_options, deprecated);
		if not deprecated_global_options:empty() then
			print("");
			print("    You have some deprecated options in the global section:");
			print("    "..tostring(deprecated_global_options))
			ok = false;
		end
		for host, options in it.filter(function (h) return h ~= "*" end, pairs(configmanager.getconfig())) do
			local host_options = set.new(it.to_array(it.keys(options)));
			local misplaced_options = set.intersection(host_options, known_global_options);
			for name in pairs(options) do
				if name:match("^interfaces?")
				or name:match("_ports?$") or name:match("_interfaces?$")
				or (name:match("_ssl$") and not name:match("^[cs]2s_ssl$")) then
					misplaced_options:add(name);
				end
			end
			if not misplaced_options:empty() then
				ok = false;
				print("");
				local n = it.count(misplaced_options);
				print("    You have "..n.." option"..(n>1 and "s " or " ").."set under "..host.." that should be");
				print("    in the global section of the config file, above any VirtualHost or Component definitions,")
				print("    see https://prosody.im/doc/configure#overview for more information.")
				print("");
				print("    You need to move the following option"..(n>1 and "s" or "")..": "..table.concat(it.to_array(misplaced_options), ", "));
			end
		end
		for host, options in enabled_hosts() do
			local host_options = set.new(it.to_array(it.keys(options)));
			local subdomain = host:match("^[^.]+");
			if not(host_options:contains("component_module")) and (subdomain == "jabber" or subdomain == "xmpp"
			   or subdomain == "chat" or subdomain == "im") then
				print("");
				print("    Suggestion: If "..host.. " is a new host with no real users yet, consider renaming it now to");
				print("     "..host:gsub("^[^.]+%.", "")..". You can use SRV records to redirect XMPP clients and servers to "..host..".");
				print("     For more information see: https://prosody.im/doc/dns");
			end
		end
		local all_modules = set.new(config["*"].modules_enabled);
		local all_options = set.new(it.to_array(it.keys(config["*"])));
		for host in enabled_hosts() do
			all_options:include(set.new(it.to_array(it.keys(config[host]))));
			all_modules:include(set.new(config[host].modules_enabled));
		end
		for mod in all_modules do
			if mod:match("^mod_") then
				print("");
				print("    Modules in modules_enabled should not have the 'mod_' prefix included.");
				print("    Change '"..mod.."' to '"..mod:match("^mod_(.*)").."'.");
			elseif mod:match("^auth_") then
				print("");
				print("    Authentication modules should not be added to modules_enabled,");
				print("    but be specified in the 'authentication' option.");
				print("    Remove '"..mod.."' from modules_enabled and instead add");
				print("        authentication = '"..mod:match("^auth_(.*)").."'");
				print("    For more information see https://prosody.im/doc/authentication");
			elseif mod:match("^storage_") then
				print("");
				print("    storage modules should not be added to modules_enabled,");
				print("    but be specified in the 'storage' option.");
				print("    Remove '"..mod.."' from modules_enabled and instead add");
				print("        storage = '"..mod:match("^storage_(.*)").."'");
				print("    For more information see https://prosody.im/doc/storage");
			end
		end
		for host, host_config in pairs(config) do --luacheck: ignore 213/host
			if type(rawget(host_config, "storage")) == "string" and rawget(host_config, "default_storage") then
				print("");
				print("    The 'default_storage' option is not needed if 'storage' is set to a string.");
				break;
			end
		end
		local require_encryption = set.intersection(all_options, set.new({
			"require_encryption", "c2s_require_encryption", "s2s_require_encryption"
		})):empty();
		local ssl = dependencies.softreq"ssl";
		if not ssl then
			if not require_encryption then
				print("");
				print("    You require encryption but LuaSec is not available.");
				print("    Connections will fail.");
				ok = false;
			end
		elseif not ssl.loadcertificate then
			if all_options:contains("s2s_secure_auth") then
				print("");
				print("    You have set s2s_secure_auth but your version of LuaSec does ");
				print("    not support certificate validation, so all s2s connections will");
				print("    fail.");
				ok = false;
			elseif all_options:contains("s2s_secure_domains") then
				local secure_domains = set.new();
				for host in enabled_hosts() do
					if config[host].s2s_secure_auth == true then
						secure_domains:add("*");
					else
						secure_domains:include(set.new(config[host].s2s_secure_domains));
					end
				end
				if not secure_domains:empty() then
					print("");
					print("    You have set s2s_secure_domains but your version of LuaSec does ");
					print("    not support certificate validation, so s2s connections to/from ");
					print("    these domains will fail.");
					ok = false;
				end
			end
		elseif require_encryption and not all_modules:contains("tls") then
			print("");
			print("    You require encryption but mod_tls is not enabled.");
			print("    Connections will fail.");
			ok = false;
		end

		print("Done.\n");
	end
	if not what or what == "dns" then
		local dns = require "net.dns";
		local idna = require "util.encodings".idna;
		local ip = require "util.ip";
		local c2s_ports = set.new(configmanager.get("*", "c2s_ports") or {5222});
		local s2s_ports = set.new(configmanager.get("*", "s2s_ports") or {5269});

		local c2s_srv_required, s2s_srv_required;
		if not c2s_ports:contains(5222) then
			c2s_srv_required = true;
		end
		if not s2s_ports:contains(5269) then
			s2s_srv_required = true;
		end

		local problem_hosts = set.new();

		local external_addresses, internal_addresses = set.new(), set.new();

		local fqdn = socket.dns.tohostname(socket.dns.gethostname());
		if fqdn then
			do
				local res = dns.lookup(idna.to_ascii(fqdn), "A");
				if res then
					for _, record in ipairs(res) do
						external_addresses:add(record.a);
					end
				end
			end
			do
				local res = dns.lookup(idna.to_ascii(fqdn), "AAAA");
				if res then
					for _, record in ipairs(res) do
						external_addresses:add(record.aaaa);
					end
				end
			end
		end

		local local_addresses = require"util.net".local_addresses() or {};

		for addr in it.values(local_addresses) do
			if not ip.new_ip(addr).private then
				external_addresses:add(addr);
			else
				internal_addresses:add(addr);
			end
		end

		if external_addresses:empty() then
			print("");
			print("   Failed to determine the external addresses of this server. Checks may be inaccurate.");
			c2s_srv_required, s2s_srv_required = true, true;
		end

		local v6_supported = not not socket.tcp6;

		for jid, host_options in enabled_hosts() do
			local all_targets_ok, some_targets_ok = true, false;
			local node, host = jid_split(jid);

			local modules, component_module = modulemanager.get_modules_for_host(host);
			if component_module then
				modules:add(component_module);
			end

			local is_component = not not host_options.component_module;
			print("Checking DNS for "..(is_component and "component" or "host").." "..jid.."...");
			if node then
				print("Only the domain part ("..host..") is used in DNS.")
			end
			local target_hosts = set.new();
			if modules:contains("c2s") then
				local res = dns.lookup("_xmpp-client._tcp."..idna.to_ascii(host)..".", "SRV");
				if res then
					for _, record in ipairs(res) do
						target_hosts:add(record.srv.target);
						if not c2s_ports:contains(record.srv.port) then
							print("    SRV target "..record.srv.target.." contains unknown client port: "..record.srv.port);
						end
					end
				else
					if c2s_srv_required then
						print("    No _xmpp-client SRV record found for "..host..", but it looks like you need one.");
						all_targets_ok = false;
					else
						target_hosts:add(host);
					end
				end
			end
			if modules:contains("s2s") then
				local res = dns.lookup("_xmpp-server._tcp."..idna.to_ascii(host)..".", "SRV");
				if res then
					for _, record in ipairs(res) do
						target_hosts:add(record.srv.target);
						if not s2s_ports:contains(record.srv.port) then
							print("    SRV target "..record.srv.target.." contains unknown server port: "..record.srv.port);
						end
					end
				else
					if s2s_srv_required then
						print("    No _xmpp-server SRV record found for "..host..", but it looks like you need one.");
						all_targets_ok = false;
					else
						target_hosts:add(host);
					end
				end
			end
			if target_hosts:empty() then
				target_hosts:add(host);
			end

			if target_hosts:contains("localhost") then
				print("    Target 'localhost' cannot be accessed from other servers");
				target_hosts:remove("localhost");
			end

			if modules:contains("proxy65") then
				local proxy65_target = configmanager.get(host, "proxy65_address") or host;
				local A, AAAA = dns.lookup(idna.to_ascii(proxy65_target), "A"), dns.lookup(idna.to_ascii(proxy65_target), "AAAA");
				local prob = {};
				if not A then
					table.insert(prob, "A");
				end
				if v6_supported and not AAAA then
					table.insert(prob, "AAAA");
				end
				if #prob > 0 then
					print("    File transfer proxy "..proxy65_target.." has no "..table.concat(prob, "/")
					.." record. Create one or set 'proxy65_address' to the correct host/IP.");
				end
			end

			for target_host in target_hosts do
				local host_ok_v4, host_ok_v6;
				do
					local res = dns.lookup(idna.to_ascii(target_host), "A");
					if res then
						for _, record in ipairs(res) do
							if external_addresses:contains(record.a) then
								some_targets_ok = true;
								host_ok_v4 = true;
							elseif internal_addresses:contains(record.a) then
								host_ok_v4 = true;
								some_targets_ok = true;
								print("    "..target_host.." A record points to internal address, external connections might fail");
							else
								print("    "..target_host.." A record points to unknown address "..record.a);
								all_targets_ok = false;
							end
						end
					end
				end
				do
					local res = dns.lookup(idna.to_ascii(target_host), "AAAA");
					if res then
						for _, record in ipairs(res) do
							if external_addresses:contains(record.aaaa) then
								some_targets_ok = true;
								host_ok_v6 = true;
							elseif internal_addresses:contains(record.aaaa) then
								host_ok_v6 = true;
								some_targets_ok = true;
								print("    "..target_host.." AAAA record points to internal address, external connections might fail");
							else
								print("    "..target_host.." AAAA record points to unknown address "..record.aaaa);
								all_targets_ok = false;
							end
						end
					end
				end

				local bad_protos = {}
				if not host_ok_v4 then
					table.insert(bad_protos, "IPv4");
				end
				if not host_ok_v6 then
					table.insert(bad_protos, "IPv6");
				end
				if #bad_protos > 0 then
					print("    Host "..target_host.." does not seem to resolve to this server ("..table.concat(bad_protos, "/")..")");
				end
				if host_ok_v6 and not v6_supported then
					print("    Host "..target_host.." has AAAA records, but your version of LuaSocket does not support IPv6.");
					print("      Please see https://prosody.im/doc/ipv6 for more information.");
				end
			end
			if not all_targets_ok then
				print("    "..(some_targets_ok and "Only some" or "No").." targets for "..host.." appear to resolve to this server.");
				if is_component then
					print("    DNS records are necessary if you want users on other servers to access this component.");
				end
				problem_hosts:add(host);
			end
			print("");
		end
		if not problem_hosts:empty() then
			print("");
			print("For more information about DNS configuration please see https://prosody.im/doc/dns");
			print("");
			ok = false;
		end
	end
	if not what or what == "certs" then
		local cert_ok;
		print"Checking certificates..."
		local x509_verify_identity = require"util.x509".verify_identity;
		local create_context = require "core.certmanager".create_context;
		local ssl = dependencies.softreq"ssl";
		-- local datetime_parse = require"util.datetime".parse_x509;
		local load_cert = ssl and ssl.loadcertificate;
		-- or ssl.cert_from_pem
		if not ssl then
			print("LuaSec not available, can't perform certificate checks")
			if what == "certs" then cert_ok = false end
		elseif not load_cert then
			print("This version of LuaSec (" .. ssl._VERSION .. ") does not support certificate checking");
			cert_ok = false
		else
			local function skip_bare_jid_hosts(host)
				if jid_split(host) then
					-- See issue #779
					return false;
				end
				return true;
			end
			for host in it.filter(skip_bare_jid_hosts, enabled_hosts()) do
				print("Checking certificate for "..host);
				-- First, let's find out what certificate this host uses.
				local host_ssl_config = configmanager.rawget(host, "ssl")
					or configmanager.rawget(host:match("%.(.*)"), "ssl");
				local global_ssl_config = configmanager.rawget("*", "ssl");
				local ok, err, ssl_config = create_context(host, "server", host_ssl_config, global_ssl_config);
				if not ok then
					print("  Error: "..err);
					cert_ok = false
				elseif not ssl_config.certificate then
					print("  No 'certificate' found for "..host)
					cert_ok = false
				elseif not ssl_config.key then
					print("  No 'key' found for "..host)
					cert_ok = false
				else
					local key, err = io.open(ssl_config.key); -- Permissions check only
					if not key then
						print("    Could not open "..ssl_config.key..": "..err);
						cert_ok = false
					else
						key:close();
					end
					local cert_fh, err = io.open(ssl_config.certificate); -- Load the file.
					if not cert_fh then
						print("    Could not open "..ssl_config.certificate..": "..err);
						cert_ok = false
					else
						print("  Certificate: "..ssl_config.certificate)
						local cert = load_cert(cert_fh:read"*a"); cert_fh:close();
						if not cert:validat(os.time()) then
							print("    Certificate has expired.")
							cert_ok = false
						elseif not cert:validat(os.time() + 86400) then
							print("    Certificate expires within one day.")
							cert_ok = false
						elseif not cert:validat(os.time() + 86400*7) then
							print("    Certificate expires within one week.")
						elseif not cert:validat(os.time() + 86400*31) then
							print("    Certificate expires within one month.")
						end
						if configmanager.get(host, "component_module") == nil
							and not x509_verify_identity(host, "_xmpp-client", cert) then
							print("    Not valid for client connections to "..host..".")
							cert_ok = false
						end
						if (not (configmanager.get(host, "anonymous_login")
							or configmanager.get(host, "authentication") == "anonymous"))
							and not x509_verify_identity(host, "_xmpp-server", cert) then
							print("    Not valid for server-to-server connections to "..host..".")
							cert_ok = false
						end
					end
				end
			end
		end
		if cert_ok == false then
			print("")
			print("For more information about certificates please see https://prosody.im/doc/certificates");
			ok = false
		end
		print("")
	end
	if not ok then
		print("Problems found, see above.");
	else
		print("All checks passed, congratulations!");
	end
	return ok and 0 or 2;
end

---------------------

local async = require "util.async";
local server = require "net.server";
local watchers = {
	error = function (_, err)
		error(err);
	end;
	waiting = function ()
		server.loop();
	end;
};
local command_runner = async.runner(function ()
	if command and command:match("^mod_") then -- Is a command in a module
		local module_name = command:match("^mod_(.+)");
		do
			local ret, err = modulemanager.load("*", module_name);
			if not ret then
				show_message("Failed to load module '"..module_name.."': "..err);
				os.exit(1);
			end
		end

		local module = modulemanager.get_module("*", module_name);
		if not module then
			show_message("Failed to load module '"..module_name.."': Unknown error");
			os.exit(1);
		end

		if not modulemanager.module_has_method(module, "command") then
			show_message("Fail: mod_"..module_name.." does not support any commands");
			os.exit(1);
		end

		local ok, ret = modulemanager.call_module_method(module, "command", arg);
		if ok then
			if type(ret) == "number" then
				os.exit(ret);
			elseif type(ret) == "string" then
				show_message(ret);
			end
			os.exit(0); -- :)
		else
			show_message("Failed to execute command: "..error_messages[ret]);
			os.exit(1); -- :(
		end
	end

	if not commands[command] then -- Show help for all commands
		function show_usage(usage, desc)
			print(" "..usage);
			print("    "..desc);
		end

		print("prosodyctl - Manage a Prosody server");
		print("");
		print("Usage: "..arg[0].." COMMAND [OPTIONS]");
		print("");
		print("Where COMMAND may be one of:\n");

		local hidden_commands = require "util.set".new{ "register", "unregister", "addplugin" };
		local commands_order = { "adduser", "passwd", "deluser", "start", "stop", "restart", "reload", "about" };

		local done = {};

		for _, command_name in ipairs(commands_order) do
			local command_func = commands[command_name];
			if command_func then
				command_func{ "--help" };
				print""
				done[command_name] = true;
			end
		end

		for command_name, command_func in pairs(commands) do
			if not done[command_name] and not hidden_commands:contains(command_name) then
				command_func{ "--help" };
				print""
				done[command_name] = true;
			end
		end


		os.exit(0);
	end

	os.exit(commands[command](arg));
end, watchers);

command_runner:run(true);