-- Prosody IM

-- Copyright (C) 2008-2009 Matthew Wild

-- Copyright (C) 2008-2009 Waqas Hussain

-- 

-- This project is MIT/X11 licensed. Please see the

-- COPYING file in the source package for more information.

--

local want_pposix_version = "0.3.1";

local pposix = assert(require "util.pposix");

if pposix._VERSION ~= want_pposix_version then module:log("warn", "Unknown version (%s) of binary pposix module, expected %s", tostring(pposix._VERSION), want_pposix_version); end

local signal = select(2, pcall(require, "util.signal"));

if type(signal) == "string" then

	module:log("warn", "Couldn't load signal library, won't respond to SIGTERM");

end

local logger_set = require "util.logger".setwriter;

local prosody = _G.prosody;

module.host = "*"; -- we're a global module

-- Allow switching away from root, some people like strange ports.

module:add_event_hook("server-started", function ()

		local uid = module:get_option("setuid");

		local gid = module:get_option("setgid");

		if gid then

			local success, msg = pposix.setgid(gid);

			if success then

				module:log("debug", "Changed group to "..gid.." successfully.");

			else

				module:log("error", "Failed to change group to "..gid..". Error: "..msg);

				prosody.shutdown("Failed to change group to "..gid);

			end

		end

		if uid then

			local success, msg = pposix.setuid(uid);

			if success then

				module:log("debug", "Changed user to "..uid.." successfully.");

			else

				module:log("error", "Failed to change user to "..uid..". Error: "..msg);

				prosody.shutdown("Failed to change user to "..uid);

			end

		end

	end);

-- Don't even think about it!

module:add_event_hook("server-starting", function ()

		local suid = module:get_option("setuid");

		if not suid or suid == 0 or suid == "root" then

			if pposix.getuid() == 0 and not module:get_option("run_as_root") then

				module:log("error", "Danger, Will Robinson! Prosody doesn't need to be run as root, so don't do it!");

				module:log("error", "For more information on running Prosody as root, see http://prosody.im/doc/root");

				prosody.shutdown("Refusing to run as root");

			end

		end

	end);

local pidfile_written;

local function remove_pidfile()

	if pidfile_written then

		os.remove(pidfile_written);

		pidfile_written = nil;

	end

end

local function write_pidfile()

	if pidfile_written then

		remove_pidfile();

	end

	local pidfile = module:get_option("pidfile");

	if pidfile then

		local pf, err = io.open(pidfile, "w+");

		if not pf then

			module:log("error", "Couldn't write pidfile; %s", err);

		else

			pf:write(tostring(pposix.getpid()));

			pf:close();

			pidfile_written = pidfile;

		end

	end

end

local syslog_opened 

function syslog_sink_maker(config)

	if not syslog_opened then

		pposix.syslog_open("prosody");

		syslog_opened = true;

	end

	local syslog, format = pposix.syslog_log, string.format;

	return function (name, level, message, ...)

			if ... then

				syslog(level, format(message, ...));

			else

				syslog(level, message);

			end

		end;

end

require "core.loggingmanager".register_sink_type("syslog", syslog_sink_maker);

local daemonize = module:get_option("daemonize");

if daemonize == nil then

	local no_daemonize = module:get_option("no_daemonize"); --COMPAT w/ 0.5

	daemonize = not no_daemonize;

	if no_daemonize ~= nil then

		module:log("warn", "The 'no_daemonize' option is now replaced by 'daemonize'");

		module:log("warn", "Update your config from 'no_daemonize = %s' to 'daemonize = %s'", tostring(no_daemonize), tostring(daemonize));

	end

end

if daemonize then

	local function daemonize_server()

		local ok, ret = pposix.daemonize();

		if not ok then

			module:log("error", "Failed to daemonize: %s", ret);

		elseif ret and ret > 0 then

			os.exit(0);

		else

			module:log("info", "Successfully daemonized to PID %d", pposix.getpid());

			write_pidfile();

		end

	end

	module:add_event_hook("server-starting", daemonize_server);

else

	-- Not going to daemonize, so write the pid of this process

	write_pidfile();

end

module:add_event_hook("server-stopped", remove_pidfile);

-- Set signal handlers

if signal.signal then

	signal.signal("SIGTERM", function ()

		module:log("warn", "Received SIGTERM");

		prosody.unlock_globals();

		prosody.shutdown("Received SIGTERM");

		prosody.lock_globals();

	end);

	signal.signal("SIGHUP", function ()

		module:log("info", "Received SIGHUP");

		prosody.reload_config();

		prosody.reopen_logfiles();

	end);

	signal.signal("SIGINT", function ()

		module:log("info", "Received SIGINT");

		prosody.unlock_globals();

		prosody.shutdown("Received SIGINT");

		prosody.lock_globals();

	end);

end