plugins/mod_posix.lua

   1
   2 local want_pposix_version = "0.3.0";
   3
   4 local pposix = assert(require "util.pposix");
   5 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
   6
   7 local signal = select(2, pcall(require, "util.signal"));
   8 if type(signal) == "string" then
   9         module:log("warn", "Couldn't load signal library, won't respond to SIGTERM");
  10 end
  11
  12 local config_get = require "core.configmanager".get;
  13 local logger_set = require "util.logger".setwriter;
  14
  15 local prosody = _G.prosody;
  16
  17 module.host = "*"; -- we're a global module
  18
  19 -- Don't even think about it!
  20 module:add_event_hook("server-starting", function ()
  21                 if pposix.getuid() == 0 and not config_get("*", "core", "run_as_root") then
  22                         module:log("error", "Danger, Will Robinson! Prosody doesn't need to be run as root, so don't do it!");
  23                         module:log("error", "For more information on running Prosody as root, see http://prosody.im/doc/root");
  24                         prosody.shutdown("Refusing to run as root");
  25                 end
  26         end);
  27
  28 local pidfile_written;
  29
  30 local function remove_pidfile()
  31         if pidfile_written then
  32                 os.remove(pidfile_written);
  33                 pidfile_written = nil;
  34         end
  35 end
  36
  37 local function write_pidfile()
  38         if pidfile_written then
  39                 remove_pidfile();
  40         end
  41         local pidfile = config_get("*", "core", "pidfile");
  42         if pidfile then
  43                 local pf, err = io.open(pidfile, "w+");
  44                 if not pf then
  45                         module:log("error", "Couldn't write pidfile; %s", err);
  46                 else
  47                         pf:write(tostring(pposix.getpid()));
  48                         pf:close();
  49                         pidfile_written = pidfile;
  50                 end
  51         end
  52 end
  53
  54 local syslog_opened
  55 function syslog_sink_maker(config)
  56         if not syslog_opened then
  57                 pposix.syslog_open("prosody");
  58                 syslog_opened = true;
  59         end
  60         local syslog, format = pposix.syslog_log, string.format;
  61         return function (name, level, message, ...)
  62                         if ... then
  63                                 syslog(level, format(message, ...));
  64                         else
  65                                 syslog(level, message);
  66                         end
  67                 end;
  68 end
  69 require "core.loggingmanager".register_sink_type("syslog", syslog_sink_maker);
  70
  71 if not config_get("*", "core", "no_daemonize") then
  72         local function daemonize_server()
  73                 local ok, ret = pposix.daemonize();
  74                 if not ok then
  75                         module:log("error", "Failed to daemonize: %s", ret);
  76                 elseif ret and ret > 0 then
  77                         os.exit(0);
  78                 else
  79                         module:log("info", "Successfully daemonized to PID %d", pposix.getpid());
  80                         write_pidfile();
  81                 end
  82         end
  83         module:add_event_hook("server-starting", daemonize_server);
  84 else
  85         -- Not going to daemonize, so write the pid of this process
  86         write_pidfile();
  87 end
  88
  89 module:add_event_hook("server-stopped", remove_pidfile);
  90
  91 -- Set signal handlers
  92 if signal.signal then
  93         signal.signal("SIGTERM", function ()
  94                 module:log("warn", "Received SIGTERM");
  95                 prosody.unlock_globals();
  96                 prosody.shutdown("Received SIGTERM");
  97                 prosody.lock_globals();
  98         end);
  99
 100         signal.signal("SIGHUP", function ()
 101                 module:log("info", "Received SIGHUP");
 102                 prosody.reload_config();
 103                 prosody.reopen_logfiles();
 104         end);
 105 end