prosody
113f3912c7cb
plugins/mod_posix.lua

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plugins/mod_posix.lua @ 11432:113f3912c7cb

util: Add Teal interface definition files Enables writing code in Teal that is aware of the interfaces and function prototypes in these other utils. Could also be used to do type checks on Lua sources, but this tends to have a lot of noise.
author Kim Alvefur <zash@zash.se>
date Tue, 09 Mar 2021 14:36:46 +0100
parent 11179:96da09c771a1
child 11830:7fe2fbfbdb1c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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Matthew Wild <mwild1@gmail.com>
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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Florian Zeitz <florob@babelmonkeys.de>
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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 = "0.4.0";
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12 local pposix = assert(require "util.pposix");
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13 if pposix._VERSION ~= want_pposix_version then
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14 module:log("warn", "Unknown version (%s) of binary pposix module, expected %s."
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15 .. "Perhaps you need to recompile?", tostring(pposix._VERSION), want_pposix_version);
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16 end
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17
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18 local have_signal, signal = pcall(require, "util.signal");
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19 if not have_signal then
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20 module:log("warn", "Couldn't load signal library, won't respond to SIGTERM");
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21 end
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22
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23 local lfs = require "lfs";
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24 local stat = lfs.attributes;
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25
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26 local prosody = _G.prosody;
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27
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28 module:set_global(); -- we're a global module
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29
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30 local umask = module:get_option_string("umask", "027");
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31 pposix.umask(umask);
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32
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33 -- Don't even think about it!
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34 if not prosody.start_time then -- server-starting
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35 if pposix.getuid() == 0 and not module:get_option_boolean("run_as_root") then
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36 module:log("error", "Danger, Will Robinson! Prosody doesn't need to be run as root, so don't do it!");
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37 module:log("error", "For more information on running Prosody as root, see https://prosody.im/doc/root");
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38 prosody.shutdown("Refusing to run as root");
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39 end
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40 end
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41
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42 local pidfile;
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43 local pidfile_handle;
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44
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45 local function remove_pidfile()
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46 if pidfile_handle then
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47 pidfile_handle:close();
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48 os.remove(pidfile);
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49 pidfile, pidfile_handle = nil, nil;
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50 end
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51 end
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52
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53 local function write_pidfile()
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54 if pidfile_handle then
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55 remove_pidfile();
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56 end
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57 pidfile = module:get_option_path("pidfile", nil, "data");
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58 if pidfile then
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59 local err;
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60 local mode = stat(pidfile) and "r+" or "w+";
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61 pidfile_handle, err = io.open(pidfile, mode);
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62 if not pidfile_handle then
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63 module:log("error", "Couldn't write pidfile at %s; %s", pidfile, err);
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64 prosody.shutdown("Couldn't write pidfile");
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65 else
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66 if not lfs.lock(pidfile_handle, "w") then -- Exclusive lock
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67 local other_pid = pidfile_handle:read("*a");
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68 module:log("error", "Another Prosody instance seems to be running with PID %s, quitting", other_pid);
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69 pidfile_handle = nil;
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70 prosody.shutdown("Prosody already running");
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71 else
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72 pidfile_handle:close();
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73 pidfile_handle, err = io.open(pidfile, "w+");
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74 if not pidfile_handle then
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75 module:log("error", "Couldn't write pidfile at %s; %s", pidfile, err);
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76 prosody.shutdown("Couldn't write pidfile");
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77 else
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78 if lfs.lock(pidfile_handle, "w") then
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79 pidfile_handle:write(tostring(pposix.getpid()));
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80 pidfile_handle:flush();
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81 end
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82 end
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83 end
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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 daemonize = prosody.opts.daemonize;
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89
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90 if daemonize == nil then
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91 -- Fall back to config file if not specified on command-line
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92 daemonize = module:get_option_boolean("daemonize", nil);
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93 if daemonize ~= nil then
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94 module:log("warn", "The 'daemonize' option has been deprecated, specify -D or -F on the command line instead.");
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95 -- TODO: Write some docs and include a link in the warning.
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96 end
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97 end
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98
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99 local function remove_log_sinks()
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100 local lm = require "core.loggingmanager";
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101 lm.register_sink_type("console", nil);
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102 lm.register_sink_type("stdout", nil);
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103 lm.reload_logging();
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104 end
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105
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106 if daemonize then
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107 local function daemonize_server()
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108 module:log("info", "Prosody is about to detach from the console, disabling further console output");
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109 remove_log_sinks();
587
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110 local ok, ret = pposix.daemonize();
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diff changeset
111 if not ok then
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112 module:log("error", "Failed to daemonize: %s", ret);
587
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113 elseif ret and ret > 0 then
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114 os.exit(0);
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diff changeset
115 else
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116 module:log("info", "Successfully daemonized to PID %d", pposix.getpid());
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diff changeset
117 write_pidfile();
587
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diff changeset
118 end
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parents:
diff changeset
119 end
11062
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120 module:hook("server-started", daemonize_server)
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121 else
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122 -- Not going to daemonize, so write the pid of this process
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123 write_pidfile();
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parents:
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124 end
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125
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Waqas Hussain <waqas20@gmail.com>
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126 module:hook("server-stopped", remove_pidfile);
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127
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128 -- Set signal handlers
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parents: 6874
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129 if have_signal then
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130 module:add_timer(0, function ()
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131 signal.signal("SIGTERM", function ()
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132 module:log("warn", "Received SIGTERM");
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133 prosody.unlock_globals();
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134 prosody.shutdown("Received SIGTERM");
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135 prosody.lock_globals();
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136 end);
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137
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138 signal.signal("SIGHUP", function ()
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139 module:log("info", "Received SIGHUP");
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140 prosody.reload_config();
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982529dd0bed mod_posix: Don't reload logging twice
Kim Alvefur <zash@zash.se>
parents: 8663
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141 -- this also reloads logging
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142 end);
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 5452
diff changeset
143
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144 signal.signal("SIGINT", function ()
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145 module:log("info", "Received SIGINT");
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146 prosody.unlock_globals();
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147 prosody.shutdown("Received SIGINT");
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148 prosody.lock_globals();
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149 end);
11179
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150
96da09c771a1 mod_posix: Hook and fire events on SIGUSR1/2
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diff changeset
151 signal.signal("SIGUSR1", function ()
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diff changeset
152 module:log("info", "Received SIGUSR1");
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153 module:fire_event("signal/SIGUSR1");
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154 end);
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155
96da09c771a1 mod_posix: Hook and fire events on SIGUSR1/2
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diff changeset
156 signal.signal("SIGUSR2", function ()
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157 module:log("info", "Received SIGUSR2");
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diff changeset
158 module:fire_event("signal/SIGUSR2");
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parents: 11062
diff changeset
159 end);
2332
7772dde4010b mod_posix: Catch SIGINT
Matthew Wild <mwild1@gmail.com>
parents: 2074
diff changeset
160 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
161 end
11179
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diff changeset
162
96da09c771a1 mod_posix: Hook and fire events on SIGUSR1/2
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diff changeset
163 -- For other modules to reference
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diff changeset
164 features = {
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165 signal_events = true;
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parents: 11062
diff changeset
166 };