prosody
e76e2fb26fca
plugins/mod_posix.lua

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plugins/mod_posix.lua @ 1681:e76e2fb26fca

Make mod_posix not complain about root user, if setuid is set to something different as root.
author Tobias Markmann <tm@ayena.de>
date Sat, 15 Aug 2009 12:19:07 +0200
parent 1680:f3d241915429
child 1682:883cf1f516a0
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 pposix.setgid(gid);
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33 module:log("debug", "Change group to "..gid..".");
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34 end
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35 if uid then
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36 pposix.setuid(uid);
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37 module:log("debug", "Change user to "..uid..".");
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38 end
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39 end);
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40
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41 -- Don't even think about it!
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42 module:add_event_hook("server-starting", function ()
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43 local suid = config_get("*", "core", "setuid");
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44 if not suid or suid == 0 or suid == "root" then
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45 if pposix.getuid() == 0 and not config_get("*", "core", "run_as_root") then
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46 module:log("error", "Danger, Will Robinson! Prosody doesn't need to be run as root, so don't do it!");
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47 module:log("error", "For more information on running Prosody as root, see http://prosody.im/doc/root");
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48 prosody.shutdown("Refusing to run as root");
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49 end
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50 end
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51 end);
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52
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53 local pidfile_written;
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54
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55 local function remove_pidfile()
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56 if pidfile_written then
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57 os.remove(pidfile_written);
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58 pidfile_written = nil;
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59 end
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60 end
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61
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62 local function write_pidfile()
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63 if pidfile_written then
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64 remove_pidfile();
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65 end
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66 local pidfile = config_get("*", "core", "pidfile");
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67 if pidfile then
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68 local pf, err = io.open(pidfile, "w+");
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69 if not pf then
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70 module:log("error", "Couldn't write pidfile; %s", err);
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71 else
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72 pf:write(tostring(pposix.getpid()));
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73 pf:close();
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74 pidfile_written = pidfile;
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75 end
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76 end
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77 end
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78
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79 local syslog_opened
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80 function syslog_sink_maker(config)
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81 if not syslog_opened then
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82 pposix.syslog_open("prosody");
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83 syslog_opened = true;
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84 end
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85 local syslog, format = pposix.syslog_log, string.format;
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86 return function (name, level, message, ...)
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87 if ... then
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88 syslog(level, format(message, ...));
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89 else
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90 syslog(level, message);
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91 end
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92 end;
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93 end
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94 require "core.loggingmanager".register_sink_type("syslog", syslog_sink_maker);
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95
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96 if not config_get("*", "core", "no_daemonize") then
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97 local function daemonize_server()
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98 local ok, ret = pposix.daemonize();
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99 if not ok then
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100 module:log("error", "Failed to daemonize: %s", ret);
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101 elseif ret and ret > 0 then
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102 os.exit(0);
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103 else
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104 module:log("info", "Successfully daemonized to PID %d", pposix.getpid());
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105 write_pidfile();
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106 end
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107 end
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108 module:add_event_hook("server-starting", daemonize_server);
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109 else
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110 -- Not going to daemonize, so write the pid of this process
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111 write_pidfile();
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112 end
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113
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114 module:add_event_hook("server-stopped", remove_pidfile);
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115
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116 -- Set signal handlers
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117 if signal.signal then
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118 signal.signal("SIGTERM", function ()
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119 module:log("warn", "Received SIGTERM");
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120 prosody.unlock_globals();
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121 prosody.shutdown("Received SIGTERM");
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122 prosody.lock_globals();
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123 end);
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124
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125 signal.signal("SIGHUP", function ()
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126 module:log("info", "Received SIGHUP");
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127 prosody.reload_config();
f4c08caca3e7 mod_posix: Use global prosody object
Matthew Wild <mwild1@gmail.com>
parents: 1119
diff changeset
128 prosody.reopen_logfiles();
1118
239d4362a040 mod_posix: Reload the config and reopen log files on SIGHUP
Matthew Wild <mwild1@gmail.com>
parents: 1092
diff changeset
129 end);
991
cd0d75de8345 mod_posix: Allow logging and pidfile options to take effect without needing to daemonize. Add the ability to catch SIGTERM.
Matthew Wild <mwild1@gmail.com>
parents: 735
diff changeset
130 end