prosody
f2c9abc71f08
plugins/mod_posix.lua

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plugins/mod_posix.lua @ 10441:f2c9abc71f08

Merge 0.11->trunk
author Kim Alvefur <zash@zash.se>
date Sun, 24 Nov 2019 04:46:36 +0100
parent 9928:d92ab8c8006a
child 10599:4f655918fef1
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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diff changeset
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
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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
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6 -- COPYING file in the source package for more information.
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7 --
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Matthew Wild <mwild1@gmail.com>
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8
728
fa45dfb27ee5 mod_posix: Check version of pposix
Matthew Wild <mwild1@gmail.com>
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9
8012
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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 "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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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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18 local have_signal, signal = pcall(require, "util.signal");
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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diff changeset
19 if not have_signal then
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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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diff changeset
20 module:log("warn", "Couldn't load signal library, won't respond to SIGTERM");
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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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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 -- Allow switching away from root, some people like strange ports.
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34 module:hook("server-started", function ()
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35 local uid = module:get_option("setuid");
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36 local gid = module:get_option("setgid");
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37 if gid then
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38 local success, msg = pposix.setgid(gid);
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39 if success then
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40 module:log("debug", "Changed group to %s successfully.", gid);
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41 else
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42 module:log("error", "Failed to change group to %s. Error: %s", gid, msg);
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43 prosody.shutdown("Failed to change group to %s", gid);
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44 end
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45 end
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46 if uid then
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47 local success, msg = pposix.setuid(uid);
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48 if success then
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49 module:log("debug", "Changed user to %s successfully.", uid);
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50 else
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51 module:log("error", "Failed to change user to %s. Error: %s", uid, msg);
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52 prosody.shutdown("Failed to change user to %s", uid);
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53 end
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54 end
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55 end);
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56
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57 -- Don't even think about it!
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Waqas Hussain <waqas20@gmail.com>
parents: 2925
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58 if not prosody.start_time then -- server-starting
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59 local suid = module:get_option("setuid");
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60 if not suid or suid == 0 or suid == "root" then
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61 if pposix.getuid() == 0 and not module:get_option_boolean("run_as_root") then
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Waqas Hussain <waqas20@gmail.com>
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62 module:log("error", "Danger, Will Robinson! Prosody doesn't need to be run as root, so don't do it!");
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a5a080c12c96 Update every link to the documentation to use HTTPS
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
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63 module:log("error", "For more information on running Prosody as root, see https://prosody.im/doc/root");
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Waqas Hussain <waqas20@gmail.com>
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64 prosody.shutdown("Refusing to run as root");
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65 end
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Waqas Hussain <waqas20@gmail.com>
parents: 2925
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66 end
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: 2925
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67 end
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68
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69 local pidfile;
08892e3f24bd mod_posix: Lock pidfile when in use, shut down if we can't write or lock the pidfile
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70 local pidfile_handle;
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71
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72 local function remove_pidfile()
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73 if pidfile_handle then
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74 pidfile_handle:close();
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75 os.remove(pidfile);
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76 pidfile, pidfile_handle = nil, nil;
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77 end
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78 end
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79
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
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80 local function write_pidfile()
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Matthew Wild <mwild1@gmail.com>
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81 if pidfile_handle then
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Matthew Wild <mwild1@gmail.com>
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82 remove_pidfile();
409f22d0430f mod_posix: Remove pidfile on exit
Matthew Wild <mwild1@gmail.com>
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83 end
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Kim Alvefur <zash@zash.se>
parents: 7731
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84 pidfile = module:get_option_path("pidfile", nil, "data");
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
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85 if pidfile then
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dec4527a7499 mod_posix: Fixed a global access.
Waqas Hussain <waqas20@gmail.com>
parents: 2923
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86 local err;
2795
d6fcd13c07e7 mod_posix: Adjust file open mode depending on whether file exists (take that fopen designers!!!)
Matthew Wild <mwild1@gmail.com>
parents: 2793
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87 local mode = stat(pidfile) and "r+" or "w+";
d6fcd13c07e7 mod_posix: Adjust file open mode depending on whether file exists (take that fopen designers!!!)
Matthew Wild <mwild1@gmail.com>
parents: 2793
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88 pidfile_handle, err = io.open(pidfile, mode);
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89 if not pidfile_handle then
08892e3f24bd mod_posix: Lock pidfile when in use, shut down if we can't write or lock the pidfile
Matthew Wild <mwild1@gmail.com>
parents: 2074
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90 module:log("error", "Couldn't write pidfile at %s; %s", pidfile, err);
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Matthew Wild <mwild1@gmail.com>
parents: 2074
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91 prosody.shutdown("Couldn't write pidfile");
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
92 else
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93 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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94 local other_pid = pidfile_handle:read("*a");
08892e3f24bd mod_posix: Lock pidfile when in use, shut down if we can't write or lock the pidfile
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95 module:log("error", "Another Prosody instance seems to be running with PID %s, quitting", other_pid);
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96 pidfile_handle = nil;
08892e3f24bd mod_posix: Lock pidfile when in use, shut down if we can't write or lock the pidfile
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97 prosody.shutdown("Prosody already running");
08892e3f24bd mod_posix: Lock pidfile when in use, shut down if we can't write or lock the pidfile
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parents: 2074
diff changeset
98 else
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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99 pidfile_handle:close();
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.
Brian Cully <bjc@junctionnetworks.com>
parents: 3029
diff changeset
100 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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parents: 3029
diff changeset
101 if not pidfile_handle then
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parents: 3029
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102 module:log("error", "Couldn't write pidfile at %s; %s", pidfile, err);
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>
parents: 3029
diff changeset
103 prosody.shutdown("Couldn't write pidfile");
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
diff changeset
104 else
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Matthew Wild <mwild1@gmail.com>
parents: 3340
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105 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>
parents: 3340
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106 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>
parents: 3340
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107 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>
parents: 3340
diff changeset
108 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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parents: 3029
diff changeset
109 end
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parents: 2074
diff changeset
110 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
111 end
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
112 end
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
113 end
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
114
6002
3547f315a1f5 mod_posix: Daemonize by default only when installed
Kim Alvefur <zash@zash.se>
parents: 5776
diff changeset
115 local daemonize = module:get_option("daemonize", prosody.installed);
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
116
5175
fabaed7418a6 mod_posix: Remove console and stdout logging sinks before daemonizing
Kim Alvefur <zash@zash.se>
parents: 4993
diff changeset
117 local function remove_log_sinks()
fabaed7418a6 mod_posix: Remove console and stdout logging sinks before daemonizing
Kim Alvefur <zash@zash.se>
parents: 4993
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118 local lm = require "core.loggingmanager";
fabaed7418a6 mod_posix: Remove console and stdout logging sinks before daemonizing
Kim Alvefur <zash@zash.se>
parents: 4993
diff changeset
119 lm.register_sink_type("console", nil);
fabaed7418a6 mod_posix: Remove console and stdout logging sinks before daemonizing
Kim Alvefur <zash@zash.se>
parents: 4993
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120 lm.register_sink_type("stdout", nil);
fabaed7418a6 mod_posix: Remove console and stdout logging sinks before daemonizing
Kim Alvefur <zash@zash.se>
parents: 4993
diff changeset
121 lm.reload_logging();
fabaed7418a6 mod_posix: Remove console and stdout logging sinks before daemonizing
Kim Alvefur <zash@zash.se>
parents: 4993
diff changeset
122 end
fabaed7418a6 mod_posix: Remove console and stdout logging sinks before daemonizing
Kim Alvefur <zash@zash.se>
parents: 4993
diff changeset
123
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
124 if daemonize then
587
43f509a1519a Add mod_posix, fixes #5
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
125 local function daemonize_server()
5177
add9ad38208e mod_posix: Log a message explaining that we are detaching from the console
Kim Alvefur <zash@zash.se>
parents: 5175
diff changeset
126 module:log("info", "Prosody is about to detach from the console, disabling further console output");
5175
fabaed7418a6 mod_posix: Remove console and stdout logging sinks before daemonizing
Kim Alvefur <zash@zash.se>
parents: 4993
diff changeset
127 remove_log_sinks();
587
43f509a1519a Add mod_posix, fixes #5
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
128 local ok, ret = pposix.daemonize();
43f509a1519a Add mod_posix, fixes #5
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
129 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
130 module:log("error", "Failed to daemonize: %s", ret);
587
43f509a1519a Add mod_posix, fixes #5
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
131 elseif ret and ret > 0 then
43f509a1519a Add mod_posix, fixes #5
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
132 os.exit(0);
43f509a1519a Add mod_posix, fixes #5
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
133 else
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
134 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.
Matthew Wild <mwild1@gmail.com>
parents: 735
diff changeset
135 write_pidfile();
587
43f509a1519a Add mod_posix, fixes #5
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
136 end
43f509a1519a Add mod_posix, fixes #5
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
137 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: 2925
diff changeset
138 if not prosody.start_time then -- server-starting
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: 2925
diff changeset
139 daemonize_server();
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: 2925
diff changeset
140 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
141 else
1032
409f22d0430f mod_posix: Remove pidfile on exit
Matthew Wild <mwild1@gmail.com>
parents: 991
diff changeset
142 -- Not going to daemonize, so write the pid of this process
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
143 write_pidfile();
587
43f509a1519a Add mod_posix, fixes #5
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
144 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
145
3537
7bbb19804d82 mod_posix: Updated to use the new events API.
Waqas Hussain <waqas20@gmail.com>
parents: 3481
diff changeset
146 module:hook("server-stopped", remove_pidfile);
1032
409f22d0430f mod_posix: Remove pidfile on exit
Matthew Wild <mwild1@gmail.com>
parents: 991
diff changeset
147
1118
239d4362a040 mod_posix: Reload the config and reopen log files on SIGHUP
Matthew Wild <mwild1@gmail.com>
parents: 1092
diff changeset
148 -- 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: 6874
diff changeset
149 if have_signal then
8663
a7a9d9511dc1 mod_posix: Delay setting signal handlers until in the main thread
Matthew Wild <mwild1@gmail.com>
parents: 8235
diff changeset
150 module:add_timer(0, function ()
a7a9d9511dc1 mod_posix: Delay setting signal handlers until in the main thread
Matthew Wild <mwild1@gmail.com>
parents: 8235
diff changeset
151 signal.signal("SIGTERM", function ()
a7a9d9511dc1 mod_posix: Delay setting signal handlers until in the main thread
Matthew Wild <mwild1@gmail.com>
parents: 8235
diff changeset
152 module:log("warn", "Received SIGTERM");
a7a9d9511dc1 mod_posix: Delay setting signal handlers until in the main thread
Matthew Wild <mwild1@gmail.com>
parents: 8235
diff changeset
153 prosody.unlock_globals();
a7a9d9511dc1 mod_posix: Delay setting signal handlers until in the main thread
Matthew Wild <mwild1@gmail.com>
parents: 8235
diff changeset
154 prosody.shutdown("Received SIGTERM");
a7a9d9511dc1 mod_posix: Delay setting signal handlers until in the main thread
Matthew Wild <mwild1@gmail.com>
parents: 8235
diff changeset
155 prosody.lock_globals();
a7a9d9511dc1 mod_posix: Delay setting signal handlers until in the main thread
Matthew Wild <mwild1@gmail.com>
parents: 8235
diff changeset
156 end);
1118
239d4362a040 mod_posix: Reload the config and reopen log files on SIGHUP
Matthew Wild <mwild1@gmail.com>
parents: 1092
diff changeset
157
8663
a7a9d9511dc1 mod_posix: Delay setting signal handlers until in the main thread
Matthew Wild <mwild1@gmail.com>
parents: 8235
diff changeset
158 signal.signal("SIGHUP", function ()
a7a9d9511dc1 mod_posix: Delay setting signal handlers until in the main thread
Matthew Wild <mwild1@gmail.com>
parents: 8235
diff changeset
159 module:log("info", "Received SIGHUP");
a7a9d9511dc1 mod_posix: Delay setting signal handlers until in the main thread
Matthew Wild <mwild1@gmail.com>
parents: 8235
diff changeset
160 prosody.reload_config();
9763
982529dd0bed mod_posix: Don't reload logging twice
Kim Alvefur <zash@zash.se>
parents: 8663
diff changeset
161 -- this also reloads logging
8663
a7a9d9511dc1 mod_posix: Delay setting signal handlers until in the main thread
Matthew Wild <mwild1@gmail.com>
parents: 8235
diff changeset
162 end);
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 5452
diff changeset
163
8663
a7a9d9511dc1 mod_posix: Delay setting signal handlers until in the main thread
Matthew Wild <mwild1@gmail.com>
parents: 8235
diff changeset
164 signal.signal("SIGINT", function ()
a7a9d9511dc1 mod_posix: Delay setting signal handlers until in the main thread
Matthew Wild <mwild1@gmail.com>
parents: 8235
diff changeset
165 module:log("info", "Received SIGINT");
a7a9d9511dc1 mod_posix: Delay setting signal handlers until in the main thread
Matthew Wild <mwild1@gmail.com>
parents: 8235
diff changeset
166 prosody.unlock_globals();
a7a9d9511dc1 mod_posix: Delay setting signal handlers until in the main thread
Matthew Wild <mwild1@gmail.com>
parents: 8235
diff changeset
167 prosody.shutdown("Received SIGINT");
a7a9d9511dc1 mod_posix: Delay setting signal handlers until in the main thread
Matthew Wild <mwild1@gmail.com>
parents: 8235
diff changeset
168 prosody.lock_globals();
a7a9d9511dc1 mod_posix: Delay setting signal handlers until in the main thread
Matthew Wild <mwild1@gmail.com>
parents: 8235
diff changeset
169 end);
2332
7772dde4010b mod_posix: Catch SIGINT
Matthew Wild <mwild1@gmail.com>
parents: 2074
diff changeset
170 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
171 end