prosody
45be94611593
plugins/mod_posix.lua

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plugins/mod_posix.lua @ 8168:45be94611593

Merge 0.10->trunk
author Kim Alvefur <zash@zash.se>
date Tue, 13 Jun 2017 20:14:06 +0200
parent 8121:a33a87f13155
parent 8167:39188851811c
child 8235:7d9a2c200736
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
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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
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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8
728
fa45dfb27ee5 mod_posix: Check version of pposix
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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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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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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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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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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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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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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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64 prosody.shutdown("Refusing to run as root");
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65 end
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66 end
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67 end
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68
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69 local 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
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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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80 local function write_pidfile()
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81 if pidfile_handle then
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82 remove_pidfile();
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83 end
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51396e0836cf mod_posix: Use path variant of config API for pidfile option
Kim Alvefur <zash@zash.se>
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84 pidfile = module:get_option_path("pidfile", nil, "data");
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85 if pidfile then
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dec4527a7499 mod_posix: Fixed a global access.
Waqas Hussain <waqas20@gmail.com>
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86 local err;
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d6fcd13c07e7 mod_posix: Adjust file open mode depending on whether file exists (take that fopen designers!!!)
Matthew Wild <mwild1@gmail.com>
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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!!!)
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88 pidfile_handle, err = io.open(pidfile, mode);
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89 if not pidfile_handle then
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90 module:log("error", "Couldn't write pidfile at %s; %s", pidfile, err);
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91 prosody.shutdown("Couldn't write pidfile");
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92 else
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93 if not lfs.lock(pidfile_handle, "w") then -- Exclusive lock
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94 local other_pid = pidfile_handle:read("*a");
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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");
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98 else
3341
a8a3e662fea7 mod_posix: Some (perhaps temporary) changes to re-lock the pidfile after truncating, to avoid breaking prosodyctl
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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
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100 pidfile_handle, err = io.open(pidfile, "w+");
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101 if not pidfile_handle then
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102 module:log("error", "Couldn't write pidfile at %s; %s", pidfile, err);
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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
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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
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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
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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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110 end
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
111 end
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
112 end
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
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
3540
bc139431830b Monster whitespace commit (beware the whitespace monster).
Waqas Hussain <waqas20@gmail.com>
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115 local syslog_opened;
8167
39188851811c mod_posix: Ignore currently unused argument [luacheck]
Kim Alvefur <zash@zash.se>
parents: 8166
diff changeset
116 function syslog_sink_maker(config) -- luacheck: ignore 212/config
1033
4a9f0d482028 mod_posix: Integrate with loggingmanager, register syslog sink, remove redundant logging code
Matthew Wild <mwild1@gmail.com>
parents: 1032
diff changeset
117 if not syslog_opened then
4794
25ce7720555f mod_posix: Support syslog_facility config option
Matthew Wild <mwild1@gmail.com>
parents: 3555
diff changeset
118 pposix.syslog_open("prosody", module:get_option_string("syslog_facility"));
1033
4a9f0d482028 mod_posix: Integrate with loggingmanager, register syslog sink, remove redundant logging code
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parents: 1032
diff changeset
119 syslog_opened = true;
991
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120 end
1033
4a9f0d482028 mod_posix: Integrate with loggingmanager, register syslog sink, remove redundant logging code
Matthew Wild <mwild1@gmail.com>
parents: 1032
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121 local syslog, format = pposix.syslog_log, string.format;
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Matthew Wild <mwild1@gmail.com>
parents: 1032
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122 return function (name, level, message, ...)
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Waqas Hussain <waqas20@gmail.com>
parents: 3537
diff changeset
123 if ... then
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Matthew Wild <mwild1@gmail.com>
parents: 5177
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124 syslog(level, name, format(message, ...));
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Waqas Hussain <waqas20@gmail.com>
parents: 3537
diff changeset
125 else
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Matthew Wild <mwild1@gmail.com>
parents: 5177
diff changeset
126 syslog(level, name, message);
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Waqas Hussain <waqas20@gmail.com>
parents: 3537
diff changeset
127 end
bc139431830b Monster whitespace commit (beware the whitespace monster).
Waqas Hussain <waqas20@gmail.com>
parents: 3537
diff changeset
128 end;
991
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Matthew Wild <mwild1@gmail.com>
parents: 735
diff changeset
129 end
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Matthew Wild <mwild1@gmail.com>
parents: 1032
diff changeset
130 require "core.loggingmanager".register_sink_type("syslog", syslog_sink_maker);
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Matthew Wild <mwild1@gmail.com>
parents: 735
diff changeset
131
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Kim Alvefur <zash@zash.se>
parents: 5776
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132 local daemonize = module:get_option("daemonize", prosody.installed);
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Matthew Wild <mwild1@gmail.com>
parents: 1712
diff changeset
133
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Kim Alvefur <zash@zash.se>
parents: 4993
diff changeset
134 local function remove_log_sinks()
fabaed7418a6 mod_posix: Remove console and stdout logging sinks before daemonizing
Kim Alvefur <zash@zash.se>
parents: 4993
diff changeset
135 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
136 lm.register_sink_type("console", nil);
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Kim Alvefur <zash@zash.se>
parents: 4993
diff changeset
137 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
138 lm.reload_logging();
fabaed7418a6 mod_posix: Remove console and stdout logging sinks before daemonizing
Kim Alvefur <zash@zash.se>
parents: 4993
diff changeset
139 end
fabaed7418a6 mod_posix: Remove console and stdout logging sinks before daemonizing
Kim Alvefur <zash@zash.se>
parents: 4993
diff changeset
140
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Matthew Wild <mwild1@gmail.com>
parents: 1712
diff changeset
141 if daemonize then
587
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Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
142 local function daemonize_server()
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add9ad38208e mod_posix: Log a message explaining that we are detaching from the console
Kim Alvefur <zash@zash.se>
parents: 5175
diff changeset
143 module:log("info", "Prosody is about to detach from the console, disabling further console output");
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Kim Alvefur <zash@zash.se>
parents: 4993
diff changeset
144 remove_log_sinks();
587
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Matthew Wild <mwild1@gmail.com>
parents:
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145 local ok, ret = pposix.daemonize();
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Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
146 if not ok then
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Matthew Wild <mwild1@gmail.com>
parents: 1061
diff changeset
147 module:log("error", "Failed to daemonize: %s", ret);
587
43f509a1519a Add mod_posix, fixes #5
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
148 elseif ret and ret > 0 then
43f509a1519a Add mod_posix, fixes #5
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
149 os.exit(0);
43f509a1519a Add mod_posix, fixes #5
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
150 else
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Matthew Wild <mwild1@gmail.com>
parents: 1061
diff changeset
151 module:log("info", "Successfully daemonized to PID %d", pposix.getpid());
991
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Matthew Wild <mwild1@gmail.com>
parents: 735
diff changeset
152 write_pidfile();
587
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Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
153 end
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Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
154 end
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Waqas Hussain <waqas20@gmail.com>
parents: 2925
diff changeset
155 if not prosody.start_time then -- server-starting
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Waqas Hussain <waqas20@gmail.com>
parents: 2925
diff changeset
156 daemonize_server();
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Waqas Hussain <waqas20@gmail.com>
parents: 2925
diff changeset
157 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
158 else
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Matthew Wild <mwild1@gmail.com>
parents: 991
diff changeset
159 -- Not going to daemonize, so write the pid of this process
991
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Matthew Wild <mwild1@gmail.com>
parents: 735
diff changeset
160 write_pidfile();
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parents:
diff changeset
161 end
991
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Matthew Wild <mwild1@gmail.com>
parents: 735
diff changeset
162
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Waqas Hussain <waqas20@gmail.com>
parents: 3481
diff changeset
163 module:hook("server-stopped", remove_pidfile);
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Matthew Wild <mwild1@gmail.com>
parents: 991
diff changeset
164
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Matthew Wild <mwild1@gmail.com>
parents: 1092
diff changeset
165 -- Set signal handlers
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Kim Alvefur <zash@zash.se>
parents: 6874
diff changeset
166 if have_signal then
991
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Matthew Wild <mwild1@gmail.com>
parents: 735
diff changeset
167 signal.signal("SIGTERM", function ()
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Matthew Wild <mwild1@gmail.com>
parents: 1092
diff changeset
168 module:log("warn", "Received SIGTERM");
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Matthew Wild <mwild1@gmail.com>
parents: 1119
diff changeset
169 prosody.unlock_globals();
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Matthew Wild <mwild1@gmail.com>
parents: 1119
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170 prosody.shutdown("Received SIGTERM");
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parents: 1119
diff changeset
171 prosody.lock_globals();
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Matthew Wild <mwild1@gmail.com>
parents: 735
diff changeset
172 end);
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Matthew Wild <mwild1@gmail.com>
parents: 1092
diff changeset
173
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Matthew Wild <mwild1@gmail.com>
parents: 1092
diff changeset
174 signal.signal("SIGHUP", function ()
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Matthew Wild <mwild1@gmail.com>
parents: 1092
diff changeset
175 module:log("info", "Received SIGHUP");
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Matthew Wild <mwild1@gmail.com>
parents: 1119
diff changeset
176 prosody.reload_config();
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Matthew Wild <mwild1@gmail.com>
parents: 1119
diff changeset
177 prosody.reopen_logfiles();
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Matthew Wild <mwild1@gmail.com>
parents: 1092
diff changeset
178 end);
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Florian Zeitz <florob@babelmonkeys.de>
parents: 5452
diff changeset
179
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Matthew Wild <mwild1@gmail.com>
parents: 2074
diff changeset
180 signal.signal("SIGINT", function ()
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Matthew Wild <mwild1@gmail.com>
parents: 2074
diff changeset
181 module:log("info", "Received SIGINT");
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Matthew Wild <mwild1@gmail.com>
parents: 2074
diff changeset
182 prosody.unlock_globals();
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Matthew Wild <mwild1@gmail.com>
parents: 2074
diff changeset
183 prosody.shutdown("Received SIGINT");
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Matthew Wild <mwild1@gmail.com>
parents: 2074
diff changeset
184 prosody.lock_globals();
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Matthew Wild <mwild1@gmail.com>
parents: 2074
diff changeset
185 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
186 end