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plugins/mod_posix.lua @ 3683:c2158221e2e6
util.timer: Activate higher timer precision.
author | Waqas Hussain <waqas20@gmail.com> |
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date | Thu, 02 Dec 2010 22:41:26 +0500 |
parent | 3555:6938b6153890 |
child | 4623:403b56b78018 |
child | 4794:25ce7720555f |
rev | line source |
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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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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 = "0.3.5"; |
587 | 11 |
12 local pposix = assert(require "util.pposix"); | |
735 | 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 |
587 | 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 lfs = require "lfs"; |
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21 local stat = lfs.attributes; |
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22 |
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23 local prosody = _G.prosody; |
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24 |
587 | 25 module.host = "*"; -- we're a global module |
26 | |
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27 local umask = module:get_option("umask") or "027"; |
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28 pposix.umask(umask); |
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29 |
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30 -- Allow switching away from root, some people like strange ports. |
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31 module:hook("server-started", function () |
1712 | 32 local uid = module:get_option("setuid"); |
33 local gid = module:get_option("setgid"); | |
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34 if gid then |
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35 local success, msg = pposix.setgid(gid); |
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36 if success then |
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37 module:log("debug", "Changed group to "..gid.." successfully."); |
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38 else |
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39 module:log("error", "Failed to change group to "..gid..". Error: "..msg); |
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40 prosody.shutdown("Failed to change group to "..gid); |
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41 end |
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42 end |
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43 if uid then |
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44 local success, msg = pposix.setuid(uid); |
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45 if success then |
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46 module:log("debug", "Changed user to "..uid.." successfully."); |
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47 else |
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48 module:log("error", "Failed to change user to "..uid..". Error: "..msg); |
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49 prosody.shutdown("Failed to change user to "..uid); |
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50 end |
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51 end |
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52 end); |
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53 |
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54 -- Don't even think about it! |
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55 if not prosody.start_time then -- server-starting |
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56 local suid = module:get_option("setuid"); |
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57 if not suid or suid == 0 or suid == "root" then |
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58 if pposix.getuid() == 0 and not module:get_option("run_as_root") then |
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59 module:log("error", "Danger, Will Robinson! Prosody doesn't need to be run as root, so don't do it!"); |
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60 module:log("error", "For more information on running Prosody as root, see http://prosody.im/doc/root"); |
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61 prosody.shutdown("Refusing to run as root"); |
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62 end |
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63 end |
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64 end |
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65 |
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66 local pidfile; |
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67 local pidfile_handle; |
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68 |
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69 local function remove_pidfile() |
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70 if pidfile_handle then |
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71 pidfile_handle:close(); |
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72 os.remove(pidfile); |
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73 pidfile, pidfile_handle = nil, nil; |
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74 end |
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75 end |
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76 |
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77 local function write_pidfile() |
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78 if pidfile_handle then |
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79 remove_pidfile(); |
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80 end |
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81 pidfile = module:get_option("pidfile"); |
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82 if pidfile then |
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83 local err; |
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84 local mode = stat(pidfile) and "r+" or "w+"; |
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85 pidfile_handle, err = io.open(pidfile, mode); |
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86 if not pidfile_handle then |
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87 module:log("error", "Couldn't write pidfile at %s; %s", pidfile, err); |
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88 prosody.shutdown("Couldn't write pidfile"); |
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89 else |
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90 if not lfs.lock(pidfile_handle, "w") then -- Exclusive lock |
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91 local other_pid = pidfile_handle:read("*a"); |
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92 module:log("error", "Another Prosody instance seems to be running with PID %s, quitting", other_pid); |
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93 pidfile_handle = nil; |
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94 prosody.shutdown("Prosody already running"); |
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95 else |
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96 pidfile_handle:close(); |
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97 pidfile_handle, err = io.open(pidfile, "w+"); |
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98 if not pidfile_handle then |
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99 module:log("error", "Couldn't write pidfile at %s; %s", pidfile, err); |
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100 prosody.shutdown("Couldn't write pidfile"); |
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101 else |
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102 if lfs.lock(pidfile_handle, "w") then |
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103 pidfile_handle:write(tostring(pposix.getpid())); |
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104 pidfile_handle:flush(); |
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105 end |
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106 end |
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107 end |
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108 end |
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109 end |
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110 end |
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111 |
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112 local syslog_opened; |
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113 function syslog_sink_maker(config) |
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114 if not syslog_opened then |
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115 pposix.syslog_open("prosody"); |
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116 syslog_opened = true; |
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117 end |
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118 local syslog, format = pposix.syslog_log, string.format; |
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119 return function (name, level, message, ...) |
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120 if ... then |
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121 syslog(level, format(message, ...)); |
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122 else |
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123 syslog(level, message); |
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124 end |
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125 end; |
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126 end |
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127 require "core.loggingmanager".register_sink_type("syslog", syslog_sink_maker); |
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128 |
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129 local daemonize = module:get_option("daemonize"); |
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130 if daemonize == nil then |
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131 local no_daemonize = module:get_option("no_daemonize"); --COMPAT w/ 0.5 |
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132 daemonize = not no_daemonize; |
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133 if no_daemonize ~= nil then |
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134 module:log("warn", "The 'no_daemonize' option is now replaced by 'daemonize'"); |
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135 module:log("warn", "Update your config from 'no_daemonize = %s' to 'daemonize = %s'", tostring(no_daemonize), tostring(daemonize)); |
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136 end |
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137 end |
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138 |
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139 if daemonize then |
587 | 140 local function daemonize_server() |
141 local ok, ret = pposix.daemonize(); | |
142 if not ok then | |
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143 module:log("error", "Failed to daemonize: %s", ret); |
587 | 144 elseif ret and ret > 0 then |
145 os.exit(0); | |
146 else | |
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147 module:log("info", "Successfully daemonized to PID %d", pposix.getpid()); |
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148 write_pidfile(); |
587 | 149 end |
150 end | |
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151 if not prosody.start_time then -- server-starting |
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152 daemonize_server(); |
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153 end |
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154 else |
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155 -- Not going to daemonize, so write the pid of this process |
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156 write_pidfile(); |
587 | 157 end |
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158 |
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159 module:hook("server-stopped", remove_pidfile); |
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160 |
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161 -- Set signal handlers |
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162 if signal.signal then |
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163 signal.signal("SIGTERM", function () |
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164 module:log("warn", "Received SIGTERM"); |
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165 prosody.unlock_globals(); |
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166 prosody.shutdown("Received SIGTERM"); |
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167 prosody.lock_globals(); |
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168 end); |
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169 |
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170 signal.signal("SIGHUP", function () |
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171 module:log("info", "Received SIGHUP"); |
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172 prosody.reload_config(); |
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173 prosody.reopen_logfiles(); |
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174 end); |
2332 | 175 |
176 signal.signal("SIGINT", function () | |
177 module:log("info", "Received SIGINT"); | |
178 prosody.unlock_globals(); | |
179 prosody.shutdown("Received SIGINT"); | |
180 prosody.lock_globals(); | |
181 end); | |
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182 end |