prosody
df96af198222
plugins/mod_posix.lua

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plugins/mod_posix.lua @ 13255:df96af198222

tools: Reflect bash-ness of mod2spec in shebang Non-portable substitution syntax? Oh well.
author Kim Alvefur <zash@zash.se>
date Sat, 26 Aug 2023 15:10:58 +0200
parent 12977:74b9e05af71e
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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Matthew Wild <mwild1@gmail.com>
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2 -- Copyright (C) 2008-2010 Matthew Wild
b7049746bd29 Update copyright headers for 2010
Matthew Wild <mwild1@gmail.com>
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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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Matthew Wild <mwild1@gmail.com>
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5 -- This project is MIT/X11 licensed. Please see the
569d58d21612 Add copyright header to those files missing one
Matthew Wild <mwild1@gmail.com>
parents: 1238
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6 -- COPYING file in the source package for more information.
569d58d21612 Add copyright header to those files missing one
Matthew Wild <mwild1@gmail.com>
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7 --
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8
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9
8012
e898c8fda986 util.pposix: Remove fallocate
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10 local want_pposix_version = "0.4.0";
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11
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12 local pposix = assert(require "prosody.util.pposix");
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13 if pposix._VERSION ~= want_pposix_version then
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bbedf564b9f9 mod_posix: Split long line [luacheck]
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14 module:log("warn", "Unknown version (%s) of binary pposix module, expected %s."
bbedf564b9f9 mod_posix: Split long line [luacheck]
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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, "prosody.util.signal");
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>
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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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403b56b78018 mod_posix, mod_bosh, mod_admin_telnet: Use module:set_global()
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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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Waqas Hussain <waqas20@gmail.com>
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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", 1);
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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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dec4527a7499 mod_posix: Fixed a global access.
Waqas Hussain <waqas20@gmail.com>
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59 local err;
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d6fcd13c07e7 mod_posix: Adjust file open mode depending on whether file exists (take that fopen designers!!!)
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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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7fe2fbfbdb1c mod_posix: Exit with non-zero status code on problems
Kim Alvefur <zash@zash.se>
parents: 11179
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64 prosody.shutdown("Couldn't write pidfile", 1);
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cd0d75de8345 mod_posix: Allow logging and pidfile options to take effect without needing to daemonize. Add the ability to catch SIGTERM.
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parents: 735
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65 else
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66 if not lfs.lock(pidfile_handle, "w") then -- Exclusive lock
08892e3f24bd mod_posix: Lock pidfile when in use, shut down if we can't write or lock the pidfile
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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", 1);
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71 else
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72 pidfile_handle:close();
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0769cc5f34b6 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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73 pidfile_handle, err = io.open(pidfile, "w+");
0769cc5f34b6 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.
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74 if not pidfile_handle then
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Brian Cully <bjc@junctionnetworks.com>
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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", 1);
3341
a8a3e662fea7 mod_posix: Some (perhaps temporary) changes to re-lock the pidfile after truncating, to avoid breaking prosodyctl
Matthew Wild <mwild1@gmail.com>
parents: 3340
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77 else
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Matthew Wild <mwild1@gmail.com>
parents: 3340
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78 if lfs.lock(pidfile_handle, "w") then
a8a3e662fea7 mod_posix: Some (perhaps temporary) changes to re-lock the pidfile after truncating, to avoid breaking prosodyctl
Matthew Wild <mwild1@gmail.com>
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79 pidfile_handle:write(tostring(pposix.getpid()));
a8a3e662fea7 mod_posix: Some (perhaps temporary) changes to re-lock the pidfile after truncating, to avoid breaking prosodyctl
Matthew Wild <mwild1@gmail.com>
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80 pidfile_handle:flush();
a8a3e662fea7 mod_posix: Some (perhaps temporary) changes to re-lock the pidfile after truncating, to avoid breaking prosodyctl
Matthew Wild <mwild1@gmail.com>
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81 end
3340
0769cc5f34b6 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.
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diff changeset
82 end
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83 end
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cd0d75de8345 mod_posix: Allow logging and pidfile options to take effect without needing to daemonize. Add the ability to catch SIGTERM.
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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;
5cf481bee678 mod_posix: Support for command-line flags to override 'daemonize' config option
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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
10628
25e178edbc2c mod_posix: Add deprecation warning for the 'daemonize' option
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92 daemonize = module:get_option_boolean("daemonize", nil);
25e178edbc2c mod_posix: Add deprecation warning for the 'daemonize' option
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parents: 10599
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93 if daemonize ~= nil then
25e178edbc2c mod_posix: Add deprecation warning for the 'daemonize' option
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parents: 10599
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94 module:log("warn", "The 'daemonize' option has been deprecated, specify -D or -F on the command line instead.");
25e178edbc2c mod_posix: Add deprecation warning for the 'daemonize' option
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95 -- TODO: Write some docs and include a link in the warning.
25e178edbc2c mod_posix: Add deprecation warning for the 'daemonize' option
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96 end
10598
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97 end
2073
72784ce0c0e0 mod_posix: Switch config option to 'daemonize', fall back to 'no_daemonize' if not set, default behaviour remains the same... daemonize if mod_posix is loaded
Matthew Wild <mwild1@gmail.com>
parents: 1712
diff changeset
98
5175
fabaed7418a6 mod_posix: Remove console and stdout logging sinks before daemonizing
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99 local function remove_log_sinks()
12977
74b9e05af71e plugins: Prefix module imports with prosody namespace
Kim Alvefur <zash@zash.se>
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100 local lm = require "prosody.core.loggingmanager";
5175
fabaed7418a6 mod_posix: Remove console and stdout logging sinks before daemonizing
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101 lm.register_sink_type("console", nil);
fabaed7418a6 mod_posix: Remove console and stdout logging sinks before daemonizing
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102 lm.register_sink_type("stdout", nil);
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103 lm.reload_logging();
fabaed7418a6 mod_posix: Remove console and stdout logging sinks before daemonizing
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104 end
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105
2073
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parents: 1712
diff changeset
106 if daemonize then
587
43f509a1519a Add mod_posix, fixes #5
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parents:
diff changeset
107 local function daemonize_server()
5177
add9ad38208e mod_posix: Log a message explaining that we are detaching from the console
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108 module:log("info", "Prosody is about to detach from the console, disabling further console output");
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Kim Alvefur <zash@zash.se>
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109 remove_log_sinks();
587
43f509a1519a Add mod_posix, fixes #5
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parents:
diff changeset
110 local ok, ret = pposix.daemonize();
43f509a1519a Add mod_posix, fixes #5
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parents:
diff changeset
111 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>
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112 module:log("error", "Failed to daemonize: %s", ret);
587
43f509a1519a Add mod_posix, fixes #5
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parents:
diff changeset
113 elseif ret and ret > 0 then
43f509a1519a Add mod_posix, fixes #5
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114 os.exit(0);
43f509a1519a Add mod_posix, fixes #5
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parents:
diff changeset
115 else
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f9a1ac50782b mod_posix: Fix calls to log() (replace with module:log) and make some global accesses explicit
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116 module:log("info", "Successfully daemonized to PID %d", pposix.getpid());
991
cd0d75de8345 mod_posix: Allow logging and pidfile options to take effect without needing to daemonize. Add the ability to catch SIGTERM.
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parents: 735
diff changeset
117 write_pidfile();
587
43f509a1519a Add mod_posix, fixes #5
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parents:
diff changeset
118 end
43f509a1519a Add mod_posix, fixes #5
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
119 end
11062
dd3b1b9d867d mod_posix: Daemonize later
Kim Alvefur <zash@zash.se>
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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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43f509a1519a Add mod_posix, fixes #5
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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
6875
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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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249eb306f668 mod_posix: Run signal handlers in the startup thread
Kim Alvefur <zash@zash.se>
parents: 11830
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133 prosody.main_thread:run(function ()
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134 prosody.unlock_globals();
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135 prosody.shutdown("Received SIGTERM");
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136 prosody.lock_globals();
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137 end);
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138 end);
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parents: 1092
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139
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140 signal.signal("SIGHUP", function ()
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141 module:log("info", "Received SIGHUP");
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142 prosody.main_thread:run(function ()
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143 prosody.reload_config();
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144 end);
9763
982529dd0bed mod_posix: Don't reload logging twice
Kim Alvefur <zash@zash.se>
parents: 8663
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145 -- this also reloads logging
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parents: 8235
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146 end);
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 5452
diff changeset
147
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148 signal.signal("SIGINT", function ()
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149 module:log("info", "Received SIGINT");
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parents: 11830
diff changeset
150 prosody.main_thread:run(function ()
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Kim Alvefur <zash@zash.se>
parents: 11830
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151 prosody.unlock_globals();
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parents: 11830
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152 prosody.shutdown("Received SIGINT");
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parents: 11830
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153 prosody.lock_globals();
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parents: 11830
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154 end);
8663
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parents: 8235
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155 end);
11179
96da09c771a1 mod_posix: Hook and fire events on SIGUSR1/2
Matthew Wild <mwild1@gmail.com>
parents: 11062
diff changeset
156
96da09c771a1 mod_posix: Hook and fire events on SIGUSR1/2
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diff changeset
157 signal.signal("SIGUSR1", function ()
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diff changeset
158 module:log("info", "Received SIGUSR1");
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parents: 11062
diff changeset
159 module:fire_event("signal/SIGUSR1");
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parents: 11062
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160 end);
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parents: 11062
diff changeset
161
96da09c771a1 mod_posix: Hook and fire events on SIGUSR1/2
Matthew Wild <mwild1@gmail.com>
parents: 11062
diff changeset
162 signal.signal("SIGUSR2", function ()
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parents: 11062
diff changeset
163 module:log("info", "Received SIGUSR2");
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parents: 11062
diff changeset
164 module:fire_event("signal/SIGUSR2");
96da09c771a1 mod_posix: Hook and fire events on SIGUSR1/2
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parents: 11062
diff changeset
165 end);
2332
7772dde4010b mod_posix: Catch SIGINT
Matthew Wild <mwild1@gmail.com>
parents: 2074
diff changeset
166 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
167 end
11179
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Matthew Wild <mwild1@gmail.com>
parents: 11062
diff changeset
168
96da09c771a1 mod_posix: Hook and fire events on SIGUSR1/2
Matthew Wild <mwild1@gmail.com>
parents: 11062
diff changeset
169 -- For other modules to reference
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diff changeset
170 features = {
96da09c771a1 mod_posix: Hook and fire events on SIGUSR1/2
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parents: 11062
diff changeset
171 signal_events = true;
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parents: 11062
diff changeset
172 };