File

prosodyctl @ 5877:615a0774e4cc

util.timer: Updated to use util.indexedbheap to provide a more complete API. Timers can now be stopped or rescheduled. Callbacks are now pcall'd. Adding/removing timers from within timer callbacks works better. Optional parameter can be passed when creating timer which gets passed to callback, eliminating the need for closures in various timer uses. Timers are now much more lightweight.
author Waqas Hussain <waqas20@gmail.com>
date Wed, 30 Oct 2013 17:44:42 -0400
parent 5809:be997c6a69be
child 6038:b3ceb7627e27
line wrap: on
line source

#!/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=os.getenv("PROSODY_SRCDIR");
CFG_CONFIGDIR=os.getenv("PROSODY_CFGDIR");
CFG_PLUGINDIR=os.getenv("PROSODY_PLUGINDIR");
CFG_DATADIR=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

-- Global 'prosody' object
local prosody = {
	hosts = {};
	events = require "util.events".new();
	platform = "posix";
	lock_globals = function () end;
	unlock_globals = function () end;
	installed = CFG_SOURCEDIR ~= nil;
	core_post_stanza = function () end; -- TODO: mod_router!
};
_G.prosody = prosody;

local dependencies = require "util.dependencies";
if not dependencies.check_dependencies() then
	os.exit(1);
end

config = require "core.configmanager"

local ENV_CONFIG;
do
	local filenames = {};
	
	local filename;
	if arg[1] == "--config" and arg[2] then
		table.insert(filenames, arg[2]);
		if CFG_CONFIGDIR then
			table.insert(filenames, CFG_CONFIGDIR.."/"..arg[2]);
		end
		table.remove(arg, 1); table.remove(arg, 1);
	else
		for _, format in ipairs(config.parsers()) do
			table.insert(filenames, (CFG_CONFIGDIR or ".").."/prosody.cfg."..format);
		end
	end
	for _,_filename in ipairs(filenames) do
		filename = _filename;
		local file = io.open(filename);
		if file then
			file:close();
			ENV_CONFIG = filename;
			CFG_CONFIGDIR = filename:match("^(.*)[\\/][^\\/]*$");
			break;
		end
	end
	local ok, level, err = config.load(filename);
	if not ok then
		print("\n");
		print("**************************");
		if level == "parser" then
			print("A problem occured while reading the config file "..(CFG_CONFIGDIR or ".").."/prosody.cfg.lua");
			local err_line, err_message = tostring(err):match("%[string .-%]:(%d*): (.*)");
			print("Error"..(err_line and (" on line "..err_line) or "")..": "..(err_message or tostring(err)));
			print("");
		elseif level == "file" then
			print("Prosody was unable to find the configuration file.");
			print("We looked for: "..(CFG_CONFIGDIR or ".").."/prosody.cfg.lua");
			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 http://prosody.im/doc/configure");
		print("Good luck!");
		print("**************************");
		print("");
		os.exit(1);
	end
end
local original_logging_config = config.get("*", "log");
config.set("*", "log", { { levels = { min="info" }, to = "console" } });

local data_path = config.get("*", "data_path") or CFG_DATADIR or "data";
local custom_plugin_paths = config.get("*", "plugin_paths");
if custom_plugin_paths then
	local path_sep = package.config:sub(3,3);
	-- path1;path2;path3;defaultpath...
	CFG_PLUGINDIR = table.concat(custom_plugin_paths, path_sep)..path_sep..(CFG_PLUGINDIR or "plugins");
end
prosody.paths = { source = CFG_SOURCEDIR, config = CFG_CONFIGDIR, 
	          plugins = CFG_PLUGINDIR or "plugins", data = data_path };

if prosody.installed then
	-- Change working directory to data path.
	require "lfs".chdir(data_path);
end

require "core.loggingmanager"

dependencies.log_warnings();

-- Switch away from root and into the prosody user --
local switched_user, current_uid;

local want_pposix_version = "0.3.6";
local ok, pposix = pcall(require, "util.pposix");

if ok and pposix then
	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)); return; end
	current_uid = pposix.getuid();
	if current_uid == 0 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!
				switched_user = true;
			end
		end
		if not switched_user then
			-- Boo!
			print("Warning: Couldn't switch to Prosody user/group '"..tostring(desired_user).."'/'"..tostring(desired_group).."': "..tostring(err));
		end
	end
	
	-- Set our umask to protect data files
	pposix.umask(config.get("*", "umask") or "027");
	pposix.setenv("HOME", data_path);
	pposix.setenv("PROSODY_CONFIG", ENV_CONFIG);
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 http://prosody.im/discuss");
	print(tostring(pposix))
	os.exit(1);
end

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


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 http://prosody.im/doc/prosodyctl#pidfile for help";
		["no-posix"] = "The mod_posix module is not enabled in the Prosody config file, see http://prosody.im/doc/prosodyctl for more info";
		["no-such-method"] = "This module has no commands";
		["not-running"] = "Prosody is not running";
		}, { __index = function (t,k) return "Error: "..(tostring(k):gsub("%-", " "):gsub("^.", string.upper)); end });

hosts = prosody.hosts;

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

for hostname, config in pairs(config.getconfig()) do
	hosts[hostname] = make_host(hostname);
end
	
local modulemanager = require "core.modulemanager"

local prosodyctl = require "util.prosodyctl"
require "socket"
-----------------------

 -- FIXME: Duplicate code waiting for util.startup
function read_version()
	-- Try to determine version
	local version_file = io.open((CFG_SOURCEDIR or ".").."/prosody.version");
	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
		prosody.version = "unknown";
	end
end

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

local prosodyctl_timeout = (config.get("*", "prosodyctl_timeout") or 5) * 2;
-----------------------
local commands = {};
local command = arg[1];

function commands.adduser(arg)
	local jid_split = require "util.jid".split;
	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 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.");
		hosts[host] = make_host(host);
	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)
	local jid_split = require "util.jid".split;
	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 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.");
		hosts[host] = make_host(host);
	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)
	local jid_split = require "util.jid".split;
	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 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 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.");
		hosts[host] = make_host(host);
	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
		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
	
	local ok, ret = prosodyctl.start();
	if ok then
		if config.get("*", "daemonize") ~= false 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
		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 switched_user and 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
	return 1;
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)
	read_version();
	if arg[1] == "--help" then
		show_usage([[about]], [[Show information about this Prosody installation]]);
		return 1;
	end
	
	local array = require "util.array";
	local keys = require "util.iterators".keys;
	
	print("Prosody "..(prosody.version or "(unknown version)"));
	print("");
	print("# Prosody directories");
	print("Data directory:  ", CFG_DATADIR or "./");
	print("Plugin directory:", CFG_PLUGINDIR or "./");
	print("Config directory:", CFG_CONFIGDIR or "./");
	print("Source directory:", CFG_SOURCEDIR or "./");
	print("");
	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 = (pcall(require, "luarocks.loader") and "Installed ("..(luarocks.cfg.program_version or "2.x+")..")")
		or (pcall(require, "luarocks.require") and "Installed (1.x)")
		or "Not installed";
	print("LuaRocks:        ", luarocks_status);
	print("");
	print("# Lua module versions");
	local module_versions, longest_name = {}, 8;
	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
	local sorted_keys = array.collect(keys(module_versions)):sort();
	for _, name in ipairs(array.collect(keys(module_versions)):sort()) 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

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 = {};

local function ask_overwrite(filename)
	return lfs.attributes(filename) and not show_yesno("Overwrite "..filename .. "?");
end

function cert_commands.config(arg)
	if #arg >= 1 and arg[1] ~= "--help" then
		local conf_filename = (CFG_DATADIR or "./certs") .. "/" .. arg[1] .. ".cnf";
		if ask_overwrite(conf_filename) then
			return nil, conf_filename;
		end
		local conf = openssl.config.new();
		conf:from_prosody(hosts, config, arg);
		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 i, k in ipairs(openssl._DN_order) do
			local v = conf.distinguished_name[k];
			if v then
				local nv;
				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
		local conf_file = io.open(conf_filename, "w");
		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 = (CFG_DATADIR or "./certs") .. "/" .. arg[1] .. ".key";
		if ask_overwrite(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 = (CFG_DATADIR or "./certs") .. "/" .. arg[1] .. ".req";
		if ask_overwrite(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, 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 = (CFG_DATADIR or "./certs") .. "/" .. arg[1] .. ".crt";
		if ask_overwrite(cert_filename) then
			return nil, cert_filename;
		end
		local _, key_filename = cert_commands.key({arg[1]});
		local _, conf_filename = cert_commands.config(arg);
		local ret;
		if key_filename and conf_filename and cert_filename
			and openssl.req{new=true, x509=true, nodes=true, key=key_filename,
				days=365, sha1=true, utf8=true, config=conf_filename, out=cert_filename} then
			show_message("Certificate written to ".. cert_filename);
		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

function commands.cert(arg)
	if #arg >= 1 and arg[1] ~= "--help" then
		openssl = require "util.openssl";
		lfs = require "lfs";
		local subcmd = table.remove(arg, 1);
		if type(cert_commands[subcmd]) == "function" then
			if not arg[1] then
				show_message"You need to supply at least one hostname"
				arg = { "--help" };
			end
			if arg[1] ~= "--help" and not hosts[arg[1]] then
				show_message(error_messages["no-such-host"]);
				return
			end
			return cert_commands[subcmd](arg);
		end
	end
	show_usage("cert config|request|generate|key", "Helpers for generating X.509 certificates and keys.")
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 array, set = require "util.array", require "util.set";
	local it = require "util.iterators";
	local ok = true;
	if not what or what == "config" then
		print("Checking config...");
		local known_global_options = set.new({
			"pidfile", "log", "plugin_paths", "prosody_user", "prosody_group", "daemonize",
			"umask", "prosodyctl_timeout", "use_ipv6", "use_libevent", "network_settings"
		});
		local config = config.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 http://prosody.im/doc/configure#overview");
		end
		-- Check for global options under hosts
		local global_options = set.new(it.to_array(it.keys(config["*"])));
		for host, options in it.filter("*", pairs(config)) 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$") 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 http://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
			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: http://prosody.im/doc/dns");
			end
		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(config.get("*", "c2s_ports") or {5222});
		local s2s_ports = set.new(config.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
			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
			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
		
		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 host, host_options in it.filter("*", pairs(config.getconfig())) do
			local all_targets_ok, some_targets_ok = true, false;
			
			local is_component = not not host_options.component_module;
			print("Checking DNS for "..(is_component and "component" or "host").." "..host.."...");
			local target_hosts = set.new();
			if not is_component 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_targst_ok = false;
					else
						target_hosts:add(host);
					end
				end
			end
			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
			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
			
			local modules = set.new(it.to_array(it.values(host_options.modules_enabled)))
			                + set.new(it.to_array(it.values(config.get("*", "modules_enabled"))))
			                + set.new({ config.get(host, "component_module") });

			if modules:contains("proxy65") then
				local proxy65_target = config.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 host in target_hosts do
				local host_ok_v4, host_ok_v6;
				local res = dns.lookup(idna.to_ascii(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("    "..host.." A record points to internal address, external connections might fail");
						else
							print("    "..host.." A record points to unknown address "..record.a);
							all_targets_ok = false;
						end
					end
				end
				local res = dns.lookup(idna.to_ascii(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("    "..host.." AAAA record points to internal address, external connections might fail");
						else
							print("    "..host.." AAAA record points to unknown address "..record.aaaa);
							all_targets_ok = false;
						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 "..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 "..host.." has AAAA records, but your version of LuaSocket does not support IPv6.");
					print("      Please see http://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 http://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 ssl = dependencies.softreq"ssl";
		-- local datetime_parse = require"util.datetime".parse_x509;
		local load_cert = ssl and ssl.x509 and ssl.x509.load;
		-- 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
			for host in pairs(hosts) do
				if host ~= "*" then -- Should check global certs too.
					print("Checking certificate for "..host);
					-- First, let's find out what certificate this host uses.
					local ssl_config = config.rawget(host, "ssl");
					if not ssl_config then
						local base_host = host:match("%.(.*)");
						ssl_config = config.get(base_host, "ssl");
					end
					if not ssl_config then
						print("  No 'ssl' option defined for "..host)
						cert_ok = false
					elseif not ssl_config.certificate then
						print("  No 'certificate' set in ssl option for "..host)
						cert_ok = false
					elseif not ssl_config.key then
						print("  No 'key' set in ssl option 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 = cert_fh:close();
							if not cert:validat(os.time()) then
								print("    Certificate has expired.")
								cert_ok = false
							end
							if config.get(host, "component_module") == nil
							and not x509_verify_identity(host, "_xmpp-client", cert) then
								print("    Not vaild for client connections to "..host..".")
								cert_ok = false
							end
							if (not (config.get(name, "anonymous_login")
								or config.get(name, "authentication") == "anonymous"))
							and not x509_verify_identity(host, "_xmpp-client", cert) then
								print("    Not vaild 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 http://prosody.im/doc/certificates");
				ok = false
			end
		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

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

if command and command:match("^mod_") then -- Is a command in a module
	local module_name = command:match("^mod_(.+)");
	local ret, err = modulemanager.load("*", module_name);
	if not ret then
		show_message("Failed to load module '"..module_name.."': "..err);
		os.exit(1);
	end
	
	table.remove(arg, 1);
	
	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 = commands[command_name];
		if command then
			command{ "--help" };
			print""
			done[command_name] = true;
		end
	end

	for command_name, command in pairs(commands) do
		if not done[command_name] and not hidden_commands:contains(command_name) then
			command{ "--help" };
			print""
			done[command_name] = true;
		end
	end
	
	
	os.exit(0);
end

os.exit(commands[command]({ select(2, unpack(arg)) }));