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plugins/mod_posix.lua @ 8878:7c3e16fdaf1d
mod_muc_unique: Use util.id for more compact identifiers
author | Kim Alvefur <zash@zash.se> |
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date | Wed, 06 Jun 2018 13:33:37 +0200 |
parent | 8663:a7a9d9511dc1 |
child | 9763:982529dd0bed |
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 |
8012 | 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 |
587 | 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 format = require "util.format".format; |
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24 local lfs = require "lfs"; |
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25 local stat = lfs.attributes; |
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26 |
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27 local prosody = _G.prosody; |
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28 |
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29 module:set_global(); -- we're a global module |
587 | 30 |
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31 local umask = module:get_option_string("umask", "027"); |
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32 pposix.umask(umask); |
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33 |
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34 -- Allow switching away from root, some people like strange ports. |
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35 module:hook("server-started", function () |
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36 local uid = module:get_option("setuid"); |
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37 local gid = module:get_option("setgid"); |
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38 if gid then |
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39 local success, msg = pposix.setgid(gid); |
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40 if success then |
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41 module:log("debug", "Changed group to %s successfully.", gid); |
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42 else |
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43 module:log("error", "Failed to change group to %s. Error: %s", gid, msg); |
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44 prosody.shutdown("Failed to change group to %s", gid); |
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45 end |
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46 end |
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47 if uid then |
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48 local success, msg = pposix.setuid(uid); |
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49 if success then |
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50 module:log("debug", "Changed user to %s successfully.", uid); |
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51 else |
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52 module:log("error", "Failed to change user to %s. Error: %s", uid, msg); |
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53 prosody.shutdown("Failed to change user to %s", uid); |
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54 end |
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55 end |
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56 end); |
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57 |
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58 -- Don't even think about it! |
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59 if not prosody.start_time then -- server-starting |
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60 local suid = module:get_option("setuid"); |
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61 if not suid or suid == 0 or suid == "root" then |
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62 if pposix.getuid() == 0 and not module:get_option_boolean("run_as_root") then |
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63 module:log("error", "Danger, Will Robinson! Prosody doesn't need to be run as root, so don't do it!"); |
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64 module:log("error", "For more information on running Prosody as root, see https://prosody.im/doc/root"); |
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65 prosody.shutdown("Refusing to run as root"); |
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66 end |
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67 end |
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68 end |
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69 |
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70 local pidfile; |
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71 local pidfile_handle; |
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72 |
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73 local function remove_pidfile() |
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74 if pidfile_handle then |
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75 pidfile_handle:close(); |
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76 os.remove(pidfile); |
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77 pidfile, pidfile_handle = nil, nil; |
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78 end |
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79 end |
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80 |
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81 local function write_pidfile() |
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82 if pidfile_handle then |
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83 remove_pidfile(); |
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84 end |
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85 pidfile = module:get_option_path("pidfile", nil, "data"); |
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86 if pidfile then |
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87 local err; |
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88 local mode = stat(pidfile) and "r+" or "w+"; |
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89 pidfile_handle, err = io.open(pidfile, mode); |
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90 if not pidfile_handle then |
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91 module:log("error", "Couldn't write pidfile at %s; %s", pidfile, err); |
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92 prosody.shutdown("Couldn't write pidfile"); |
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93 else |
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94 if not lfs.lock(pidfile_handle, "w") then -- Exclusive lock |
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95 local other_pid = pidfile_handle:read("*a"); |
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96 module:log("error", "Another Prosody instance seems to be running with PID %s, quitting", other_pid); |
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97 pidfile_handle = nil; |
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98 prosody.shutdown("Prosody already running"); |
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99 else |
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100 pidfile_handle:close(); |
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101 pidfile_handle, err = io.open(pidfile, "w+"); |
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102 if not pidfile_handle then |
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103 module:log("error", "Couldn't write pidfile at %s; %s", pidfile, err); |
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104 prosody.shutdown("Couldn't write pidfile"); |
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105 else |
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106 if lfs.lock(pidfile_handle, "w") then |
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107 pidfile_handle:write(tostring(pposix.getpid())); |
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108 pidfile_handle:flush(); |
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109 end |
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mod_posix: Truncate the pidfile before writing to ensure that we never overwrite with a PID shorter than the previous, and end with an invalid PID in the file.
Brian Cully <bjc@junctionnetworks.com>
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110 end |
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111 end |
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112 end |
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113 end |
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114 end |
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115 |
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116 local syslog_opened; |
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Kim Alvefur <zash@zash.se>
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changeset
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117 function syslog_sink_maker(config) -- luacheck: ignore 212/config |
1033
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118 if not syslog_opened then |
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119 pposix.syslog_open("prosody", module:get_option_string("syslog_facility")); |
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120 syslog_opened = true; |
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121 end |
8226
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122 local syslog = pposix.syslog_log; |
1033
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123 return function (name, level, message, ...) |
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124 syslog(level, name, format(message, ...)); |
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125 end; |
991
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126 end |
1033
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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", prosody.installed); |
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130 |
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131 local function remove_log_sinks() |
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132 local lm = require "core.loggingmanager"; |
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133 lm.register_sink_type("console", nil); |
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134 lm.register_sink_type("stdout", nil); |
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135 lm.reload_logging(); |
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diff
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136 end |
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parents:
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137 |
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Matthew Wild <mwild1@gmail.com>
parents:
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diff
changeset
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138 if daemonize then |
587 | 139 local function daemonize_server() |
5177
add9ad38208e
mod_posix: Log a message explaining that we are detaching from the console
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parents:
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140 module:log("info", "Prosody is about to detach from the console, disabling further console output"); |
5175
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Kim Alvefur <zash@zash.se>
parents:
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diff
changeset
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141 remove_log_sinks(); |
587 | 142 local ok, ret = pposix.daemonize(); |
143 if not ok then | |
1062
f9a1ac50782b
mod_posix: Fix calls to log() (replace with module:log) and make some global accesses explicit
Matthew Wild <mwild1@gmail.com>
parents:
1061
diff
changeset
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144 module:log("error", "Failed to daemonize: %s", ret); |
587 | 145 elseif ret and ret > 0 then |
146 os.exit(0); | |
147 else | |
1062
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parents:
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148 module:log("info", "Successfully daemonized to PID %d", pposix.getpid()); |
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parents:
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diff
changeset
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149 write_pidfile(); |
587 | 150 end |
151 end | |
3022
948d511f479c
mod_posix: Don't add a server-starting event handler while the server-starting event is being fired.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
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152 if not prosody.start_time then -- server-starting |
948d511f479c
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parents:
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diff
changeset
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153 daemonize_server(); |
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parents:
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diff
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154 end |
991
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parents:
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diff
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155 else |
1032
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mod_posix: Remove pidfile on exit
Matthew Wild <mwild1@gmail.com>
parents:
991
diff
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156 -- Not going to daemonize, so write the pid of this process |
991
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parents:
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diff
changeset
|
157 write_pidfile(); |
587 | 158 end |
991
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parents:
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diff
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159 |
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Waqas Hussain <waqas20@gmail.com>
parents:
3481
diff
changeset
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160 module:hook("server-stopped", remove_pidfile); |
1032
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parents:
991
diff
changeset
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161 |
1118
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mod_posix: Reload the config and reopen log files on SIGHUP
Matthew Wild <mwild1@gmail.com>
parents:
1092
diff
changeset
|
162 -- Set signal handlers |
6875
12d68f7b1be0
mod_posix: Detect failure to load util.signal by first pcall return value not by type of the second
Kim Alvefur <zash@zash.se>
parents:
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diff
changeset
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163 if have_signal then |
8663
a7a9d9511dc1
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Matthew Wild <mwild1@gmail.com>
parents:
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164 module:add_timer(0, function () |
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diff
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165 signal.signal("SIGTERM", function () |
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diff
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166 module:log("warn", "Received SIGTERM"); |
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167 prosody.unlock_globals(); |
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parents:
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168 prosody.shutdown("Received SIGTERM"); |
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parents:
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169 prosody.lock_globals(); |
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parents:
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diff
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170 end); |
1118
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parents:
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diff
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171 |
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172 signal.signal("SIGHUP", function () |
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173 module:log("info", "Received SIGHUP"); |
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parents:
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174 prosody.reload_config(); |
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175 prosody.reopen_logfiles(); |
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Matthew Wild <mwild1@gmail.com>
parents:
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diff
changeset
|
176 end); |
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bd0ff8ae98a8
Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents:
5452
diff
changeset
|
177 |
8663
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parents:
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|
178 signal.signal("SIGINT", function () |
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179 module:log("info", "Received SIGINT"); |
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|
180 prosody.unlock_globals(); |
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parents:
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181 prosody.shutdown("Received SIGINT"); |
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182 prosody.lock_globals(); |
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|
183 end); |
2332 | 184 end); |
991
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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
|
185 end |