prosody
874cab7b4b3e
plugins/mod_posix.lua

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plugins/mod_posix.lua @ 5035:874cab7b4b3e

mod_storage_sql: Add method for listing stores
author Kim Alvefur <zash@zash.se>
date Sat, 28 Jul 2012 21:27:45 +0200
parent 4993:5243b74a4cbb
child 5175:fabaed7418a6
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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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";
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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 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
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25 module:set_global(); -- we're a global module
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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 ()
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32 local uid = module:get_option("setuid");
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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 %s successfully.", gid);
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38 else
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39 module:log("error", "Failed to change group to %s. Error: %s", gid, msg);
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40 prosody.shutdown("Failed to change group to %s", 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 %s successfully.", uid);
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47 else
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48 module:log("error", "Failed to change user to %s. Error: %s", uid, msg);
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49 prosody.shutdown("Failed to change user to %s", 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", module:get_option_string("syslog_facility"));
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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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parents: 1712
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130 if daemonize == nil then
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c59c8f3ec645 mod_posix: Log warning when no_daemonize is used, and instruct on how to update config
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parents: 2073
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131 local no_daemonize = module:get_option("no_daemonize"); --COMPAT w/ 0.5
c59c8f3ec645 mod_posix: Log warning when no_daemonize is used, and instruct on how to update config
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parents: 2073
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132 daemonize = not no_daemonize;
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133 if no_daemonize ~= nil then
c59c8f3ec645 mod_posix: Log warning when no_daemonize is used, and instruct on how to update config
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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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parents: 2073
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136 end
2073
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parents: 1712
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137 end
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parents: 1712
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138
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parents: 1712
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139 if daemonize then
587
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parents:
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140 local function daemonize_server()
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parents:
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141 local ok, ret = pposix.daemonize();
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parents:
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142 if not ok then
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Matthew Wild <mwild1@gmail.com>
parents: 1061
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143 module:log("error", "Failed to daemonize: %s", ret);
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parents:
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144 elseif ret and ret > 0 then
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parents:
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145 os.exit(0);
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parents:
diff changeset
146 else
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parents: 1061
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147 module:log("info", "Successfully daemonized to PID %d", pposix.getpid());
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148 write_pidfile();
587
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parents:
diff changeset
149 end
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parents:
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150 end
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Waqas Hussain <waqas20@gmail.com>
parents: 2925
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151 if not prosody.start_time then -- server-starting
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parents: 2925
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152 daemonize_server();
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parents: 2925
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153 end
991
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Matthew Wild <mwild1@gmail.com>
parents: 735
diff changeset
154 else
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parents: 991
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155 -- Not going to daemonize, so write the pid of this process
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156 write_pidfile();
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parents:
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157 end
991
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parents: 735
diff changeset
158
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parents: 3481
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159 module:hook("server-stopped", remove_pidfile);
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parents: 991
diff changeset
160
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161 -- Set signal handlers
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parents: 735
diff changeset
162 if signal.signal then
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parents: 735
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163 signal.signal("SIGTERM", function ()
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parents: 1092
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164 module:log("warn", "Received SIGTERM");
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165 prosody.unlock_globals();
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parents: 1119
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166 prosody.shutdown("Received SIGTERM");
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parents: 1119
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167 prosody.lock_globals();
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parents: 735
diff changeset
168 end);
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parents: 1092
diff changeset
169
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parents: 1092
diff changeset
170 signal.signal("SIGHUP", function ()
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Matthew Wild <mwild1@gmail.com>
parents: 1092
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171 module:log("info", "Received SIGHUP");
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diff changeset
172 prosody.reload_config();
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173 prosody.reopen_logfiles();
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parents: 1092
diff changeset
174 end);
2332
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parents: 2074
diff changeset
175
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parents: 2074
diff changeset
176 signal.signal("SIGINT", function ()
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parents: 2074
diff changeset
177 module:log("info", "Received SIGINT");
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parents: 2074
diff changeset
178 prosody.unlock_globals();
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parents: 2074
diff changeset
179 prosody.shutdown("Received SIGINT");
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parents: 2074
diff changeset
180 prosody.lock_globals();
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parents: 2074
diff changeset
181 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
182 end