prosody
883cf1f516a0
plugins/mod_posix.lua

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plugins/mod_posix.lua @ 1682:883cf1f516a0

Shutdown prosody if changing user or group fails.
author Tobias Markmann <tm@ayena.de>
date Sat, 15 Aug 2009 12:30:43 +0200
parent 1681:e76e2fb26fca
child 1712:45a81d6d8777
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 config_get = require "core.configmanager".get;
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21 local logger_set = require "util.logger".setwriter;
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22
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23 local prosody = _G.prosody;
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24
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25 module.host = "*"; -- we're a global module
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26
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27 -- Allow switching away from root, some people like strange ports.
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28 module:add_event_hook("server-started", function ()
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29 local uid = config_get("*", "core", "setuid");
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30 local gid = config_get("*", "core", "setgid");
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31 if gid then
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32 local success, msg = pposix.setgid(gid);
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33 if success then
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34 module:log("debug", "Changed group to "..gid.." successfully.");
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35 else
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36 module:log("error", "Failed to change group to "..gid..". Error: "..msg);
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37 prosody.shutdown("Failed to change group to "..gid);
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38 end
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39 end
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40 if uid then
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41 local success, msg = pposix.setuid(uid);
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42 if success then
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43 module:log("debug", "Changed user to "..uid.." successfully.");
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44 else
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45 module:log("error", "Failed to change user to "..uid..". Error: "..msg);
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46 prosody.shutdown("Failed to change user to "..uid);
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47 end
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48 end
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49 end);
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50
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51 -- Don't even think about it!
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52 module:add_event_hook("server-starting", function ()
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53 local suid = config_get("*", "core", "setuid");
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54 if not suid or suid == 0 or suid == "root" then
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55 if pposix.getuid() == 0 and not config_get("*", "core", "run_as_root") then
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56 module:log("error", "Danger, Will Robinson! Prosody doesn't need to be run as root, so don't do it!");
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57 module:log("error", "For more information on running Prosody as root, see http://prosody.im/doc/root");
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58 prosody.shutdown("Refusing to run as root");
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59 end
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60 end
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61 end);
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62
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63 local pidfile_written;
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64
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65 local function remove_pidfile()
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66 if pidfile_written then
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67 os.remove(pidfile_written);
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68 pidfile_written = nil;
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69 end
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70 end
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71
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72 local function write_pidfile()
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73 if pidfile_written then
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74 remove_pidfile();
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75 end
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76 local pidfile = config_get("*", "core", "pidfile");
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77 if pidfile then
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78 local pf, err = io.open(pidfile, "w+");
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79 if not pf then
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80 module:log("error", "Couldn't write pidfile; %s", err);
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81 else
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82 pf:write(tostring(pposix.getpid()));
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83 pf:close();
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84 pidfile_written = pidfile;
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85 end
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86 end
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87 end
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88
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89 local syslog_opened
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90 function syslog_sink_maker(config)
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91 if not syslog_opened then
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92 pposix.syslog_open("prosody");
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93 syslog_opened = true;
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94 end
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95 local syslog, format = pposix.syslog_log, string.format;
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96 return function (name, level, message, ...)
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97 if ... then
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98 syslog(level, format(message, ...));
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99 else
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100 syslog(level, message);
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101 end
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102 end;
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103 end
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104 require "core.loggingmanager".register_sink_type("syslog", syslog_sink_maker);
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105
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106 if not config_get("*", "core", "no_daemonize") then
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107 local function daemonize_server()
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108 local ok, ret = pposix.daemonize();
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109 if not ok then
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110 module:log("error", "Failed to daemonize: %s", ret);
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111 elseif ret and ret > 0 then
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112 os.exit(0);
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113 else
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114 module:log("info", "Successfully daemonized to PID %d", pposix.getpid());
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115 write_pidfile();
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116 end
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117 end
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118 module:add_event_hook("server-starting", daemonize_server);
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119 else
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120 -- Not going to daemonize, so write the pid of this process
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121 write_pidfile();
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122 end
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123
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124 module:add_event_hook("server-stopped", remove_pidfile);
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125
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126 -- Set signal handlers
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127 if signal.signal then
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128 signal.signal("SIGTERM", function ()
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129 module:log("warn", "Received SIGTERM");
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130 prosody.unlock_globals();
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131 prosody.shutdown("Received SIGTERM");
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132 prosody.lock_globals();
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133 end);
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134
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135 signal.signal("SIGHUP", function ()
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136 module:log("info", "Received SIGHUP");
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137 prosody.reload_config();
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138 prosody.reopen_logfiles();
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parents: 1092
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139 end);
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140 end