prosody
2a163f6a4bc2
plugins/mod_posix.lua

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plugins/mod_posix.lua @ 2338:2a163f6a4bc2

mod_posix: Set empty SIGINT handler when a SIGINT is caught
author Matthew Wild <mwild1@gmail.com>
date Tue, 08 Dec 2009 01:16:24 +0000
parent 2332:7772dde4010b
child 2342:8b20702d5b9e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1522
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2009 Matthew Wild
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3 -- Copyright (C) 2008-2009 Waqas Hussain
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4 --
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8
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9
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10 local want_pposix_version = "0.3.1";
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11
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12 local pposix = assert(require "util.pposix");
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13 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
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14
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15 local signal = select(2, pcall(require, "util.signal"));
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16 if type(signal) == "string" then
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17 module:log("warn", "Couldn't load signal library, won't respond to SIGTERM");
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18 end
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19
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20 local logger_set = require "util.logger".setwriter;
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21
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22 local prosody = _G.prosody;
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23
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24 module.host = "*"; -- we're a global module
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25
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26 -- Allow switching away from root, some people like strange ports.
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27 module:add_event_hook("server-started", function ()
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28 local uid = module:get_option("setuid");
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29 local gid = module:get_option("setgid");
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30 if gid then
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31 local success, msg = pposix.setgid(gid);
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32 if success then
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33 module:log("debug", "Changed group to "..gid.." successfully.");
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34 else
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35 module:log("error", "Failed to change group to "..gid..". Error: "..msg);
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36 prosody.shutdown("Failed to change group to "..gid);
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37 end
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38 end
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39 if uid then
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40 local success, msg = pposix.setuid(uid);
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41 if success then
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42 module:log("debug", "Changed user to "..uid.." successfully.");
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43 else
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44 module:log("error", "Failed to change user to "..uid..". Error: "..msg);
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45 prosody.shutdown("Failed to change user to "..uid);
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46 end
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47 end
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48 end);
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49
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50 -- Don't even think about it!
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51 module:add_event_hook("server-starting", function ()
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52 local suid = module:get_option("setuid");
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53 if not suid or suid == 0 or suid == "root" then
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54 if pposix.getuid() == 0 and not module:get_option("run_as_root") then
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55 module:log("error", "Danger, Will Robinson! Prosody doesn't need to be run as root, so don't do it!");
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56 module:log("error", "For more information on running Prosody as root, see http://prosody.im/doc/root");
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57 prosody.shutdown("Refusing to run as root");
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58 end
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59 end
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60 end);
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61
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62 local pidfile_written;
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63
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64 local function remove_pidfile()
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65 if pidfile_written then
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66 os.remove(pidfile_written);
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67 pidfile_written = nil;
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68 end
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69 end
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70
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71 local function write_pidfile()
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72 if pidfile_written then
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73 remove_pidfile();
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74 end
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75 local pidfile = module:get_option("pidfile");
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76 if pidfile then
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77 local pf, err = io.open(pidfile, "w+");
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78 if not pf then
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79 module:log("error", "Couldn't write pidfile; %s", err);
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80 else
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81 pf:write(tostring(pposix.getpid()));
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82 pf:close();
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83 pidfile_written = pidfile;
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84 end
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85 end
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86 end
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87
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88 local syslog_opened
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89 function syslog_sink_maker(config)
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90 if not syslog_opened then
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91 pposix.syslog_open("prosody");
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92 syslog_opened = true;
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93 end
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94 local syslog, format = pposix.syslog_log, string.format;
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95 return function (name, level, message, ...)
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96 if ... then
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97 syslog(level, format(message, ...));
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98 else
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99 syslog(level, message);
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100 end
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101 end;
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102 end
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103 require "core.loggingmanager".register_sink_type("syslog", syslog_sink_maker);
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104
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105 local daemonize = module:get_option("daemonize");
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106 if daemonize == nil then
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107 local no_daemonize = module:get_option("no_daemonize"); --COMPAT w/ 0.5
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108 daemonize = not no_daemonize;
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109 if no_daemonize ~= nil then
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110 module:log("warn", "The 'no_daemonize' option is now replaced by 'daemonize'");
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111 module:log("warn", "Update your config from 'no_daemonize = %s' to 'daemonize = %s'", tostring(no_daemonize), tostring(daemonize));
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112 end
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113 end
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114
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115 if daemonize then
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116 local function daemonize_server()
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117 local ok, ret = pposix.daemonize();
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118 if not ok then
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119 module:log("error", "Failed to daemonize: %s", ret);
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120 elseif ret and ret > 0 then
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121 os.exit(0);
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122 else
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123 module:log("info", "Successfully daemonized to PID %d", pposix.getpid());
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124 write_pidfile();
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125 end
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126 end
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127 module:add_event_hook("server-starting", daemonize_server);
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128 else
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129 -- Not going to daemonize, so write the pid of this process
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130 write_pidfile();
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131 end
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132
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133 module:add_event_hook("server-stopped", remove_pidfile);
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134
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135 -- Set signal handlers
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136 if signal.signal then
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137 signal.signal("SIGTERM", function ()
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138 module:log("warn", "Received SIGTERM");
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139 prosody.unlock_globals();
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140 prosody.shutdown("Received SIGTERM");
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141 prosody.lock_globals();
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142 end);
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143
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144 signal.signal("SIGHUP", function ()
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145 module:log("info", "Received SIGHUP");
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146 prosody.reload_config();
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147 prosody.reopen_logfiles();
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148 end);
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149
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150 signal.signal("SIGINT", function ()
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151 module:log("info", "Received SIGINT");
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152 signal.signal("SIGINT", function () end); -- Fixes us getting into some kind of loop
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153 prosody.unlock_globals();
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154 prosody.shutdown("Received SIGINT");
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155 prosody.lock_globals();
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156 end);
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157 end