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-- 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.
--
local want_pposix_version = "0.3.6";
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. Perhaps you need to recompile?", tostring(pposix._VERSION), want_pposix_version);
end
local have_signal, signal = pcall(require, "util.signal");
if not have_signal then
module:log("warn", "Couldn't load signal library, won't respond to SIGTERM");
end
local lfs = require "lfs";
local stat = lfs.attributes;
local prosody = _G.prosody;
module:set_global(); -- we're a global module
local umask = module:get_option_string("umask", "027");
pposix.umask(umask);
-- Allow switching away from root, some people like strange ports.
module: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 %s successfully.", gid);
else
module:log("error", "Failed to change group to %s. Error: %s", gid, msg);
prosody.shutdown("Failed to change group to %s", gid);
end
end
if uid then
local success, msg = pposix.setuid(uid);
if success then
module:log("debug", "Changed user to %s successfully.", uid);
else
module:log("error", "Failed to change user to %s. Error: %s", uid, msg);
prosody.shutdown("Failed to change user to %s", uid);
end
end
end);
-- Don't even think about it!
if not prosody.start_time then -- server-starting
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 https://prosody.im/doc/root");
prosody.shutdown("Refusing to run as root");
end
end
end
local pidfile;
local pidfile_handle;
local function remove_pidfile()
if pidfile_handle then
pidfile_handle:close();
os.remove(pidfile);
pidfile, pidfile_handle = nil, nil;
end
end
local function write_pidfile()
if pidfile_handle then
remove_pidfile();
end
pidfile = module:get_option_path("pidfile", nil, "data");
if pidfile then
local err;
local mode = stat(pidfile) and "r+" or "w+";
pidfile_handle, err = io.open(pidfile, mode);
if not pidfile_handle then
module:log("error", "Couldn't write pidfile at %s; %s", pidfile, err);
prosody.shutdown("Couldn't write pidfile");
else
if not lfs.lock(pidfile_handle, "w") then -- Exclusive lock
local other_pid = pidfile_handle:read("*a");
module:log("error", "Another Prosody instance seems to be running with PID %s, quitting", other_pid);
pidfile_handle = nil;
prosody.shutdown("Prosody already running");
else
pidfile_handle:close();
pidfile_handle, err = io.open(pidfile, "w+");
if not pidfile_handle then
module:log("error", "Couldn't write pidfile at %s; %s", pidfile, err);
prosody.shutdown("Couldn't write pidfile");
else
if lfs.lock(pidfile_handle, "w") then
pidfile_handle:write(tostring(pposix.getpid()));
pidfile_handle:flush();
end
end
end
end
end
end
local syslog_opened;
function syslog_sink_maker(config)
if not syslog_opened then
pposix.syslog_open("prosody", module:get_option_string("syslog_facility"));
syslog_opened = true;
end
local syslog, format = pposix.syslog_log, string.format;
return function (name, level, message, ...)
if ... then
syslog(level, name, format(message, ...));
else
syslog(level, name, message);
end
end;
end
require "core.loggingmanager".register_sink_type("syslog", syslog_sink_maker);
local daemonize = module:get_option("daemonize", prosody.installed);
local function remove_log_sinks()
local lm = require "core.loggingmanager";
lm.register_sink_type("console", nil);
lm.register_sink_type("stdout", nil);
lm.reload_logging();
end
if daemonize then
local function daemonize_server()
module:log("info", "Prosody is about to detach from the console, disabling further console output");
remove_log_sinks();
local ok, ret = pposix.daemonize();
if not ok then
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
if not prosody.start_time then -- server-starting
daemonize_server();
end
else
-- Not going to daemonize, so write the pid of this process
write_pidfile();
end
module:hook("server-stopped", remove_pidfile);
-- Set signal handlers
if have_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
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