prosody
598df17b8ebb
plugins/mod_posix.lua

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plugins/mod_posix.lua @ 13458:598df17b8ebb

util.startup: Hook signals after daemonization signalfds stop working with epoll after forking hooking signals later should not affect anything
author Kim Alvefur <zash@zash.se>
date Wed, 06 Mar 2024 20:43:25 +0100
parent 13452:69faf3552d52
child 13461:c673ff1075bd
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
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>
parents: 1238
diff changeset
7 --
569d58d21612 Add copyright header to those files missing one
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
e898c8fda986 util.pposix: Remove fallocate
Kim Alvefur <zash@zash.se>
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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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edf3db386a19 mod_posix: Improve error message for a pposix version mismatch
Matthew Wild <mwild1@gmail.com>
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13 if pposix._VERSION ~= want_pposix_version then
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bbedf564b9f9 mod_posix: Split long line [luacheck]
Kim Alvefur <zash@zash.se>
parents: 8116
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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);
5452
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16 end
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17
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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18
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08892e3f24bd mod_posix: Lock pidfile when in use, shut down if we can't write or lock the pidfile
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19 local lfs = require "lfs";
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d6fcd13c07e7 mod_posix: Adjust file open mode depending on whether file exists (take that fopen designers!!!)
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20 local stat = lfs.attributes;
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21
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f4c08caca3e7 mod_posix: Use global prosody object
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22 local prosody = _G.prosody;
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23
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403b56b78018 mod_posix, mod_bosh, mod_admin_telnet: Use module:set_global()
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24 module:set_global(); -- we're a global module
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25
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26 local umask = module:get_option_string("umask", "027");
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11e3d16a128f mod_posix: Set umask to 'umask' from the config, or 027
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27 pposix.umask(umask);
11e3d16a128f mod_posix: Set umask to 'umask' from the config, or 027
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28
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b547967d87fc mod_posix: Don't let the server run as root without the magic run_as_root in config
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29 -- Don't even think about it!
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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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30 if not prosody.start_time then -- server-starting
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93cdd1ece689 mod_posix: Remove ancient undocumented user switching
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31 if pposix.getuid() == 0 and not module:get_option_boolean("run_as_root") then
93cdd1ece689 mod_posix: Remove ancient undocumented user switching
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32 module:log("error", "Danger, Will Robinson! Prosody doesn't need to be run as root, so don't do it!");
93cdd1ece689 mod_posix: Remove ancient undocumented user switching
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33 module:log("error", "For more information on running Prosody as root, see https://prosody.im/doc/root");
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Kim Alvefur <zash@zash.se>
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34 prosody.shutdown("Refusing to run as root", 1);
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35 end
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36 end
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37
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38 local pidfile;
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39 local pidfile_handle;
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40
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41 local function remove_pidfile()
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42 if pidfile_handle then
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43 pidfile_handle:close();
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44 os.remove(pidfile);
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45 pidfile, pidfile_handle = nil, nil;
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46 end
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47 end
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48
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49 local function write_pidfile()
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50 if pidfile_handle then
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51 remove_pidfile();
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52 end
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51396e0836cf mod_posix: Use path variant of config API for pidfile option
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53 pidfile = module:get_option_path("pidfile", nil, "data");
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54 if pidfile then
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dec4527a7499 mod_posix: Fixed a global access.
Waqas Hussain <waqas20@gmail.com>
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55 local err;
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56 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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57 pidfile_handle, err = io.open(pidfile, mode);
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58 if not pidfile_handle then
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59 module:log("error", "Couldn't write pidfile at %s; %s", pidfile, err);
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60 prosody.shutdown("Couldn't write pidfile", 1);
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61 else
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62 if not lfs.lock(pidfile_handle, "w") then -- Exclusive lock
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63 local other_pid = pidfile_handle:read("*a");
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64 module:log("error", "Another Prosody instance seems to be running with PID %s, quitting", other_pid);
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65 pidfile_handle = nil;
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66 prosody.shutdown("Prosody already running", 1);
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67 else
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a8a3e662fea7 mod_posix: Some (perhaps temporary) changes to re-lock the pidfile after truncating, to avoid breaking prosodyctl
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68 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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69 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
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70 if not pidfile_handle then
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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71 module:log("error", "Couldn't write pidfile at %s; %s", pidfile, err);
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72 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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73 else
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parents: 3340
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74 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
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parents: 3340
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75 pidfile_handle:write(tostring(pposix.getpid()));
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Matthew Wild <mwild1@gmail.com>
parents: 3340
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76 pidfile_handle:flush();
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parents: 3340
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77 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
78 end
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79 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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parents: 735
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80 end
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81 end
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parents: 735
diff changeset
82 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
83
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84 local daemonize = prosody.opts.daemonize;
5cf481bee678 mod_posix: Support for command-line flags to override 'daemonize' config option
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85
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86 if daemonize == nil then
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87 -- Fall back to config file if not specified on command-line
10628
25e178edbc2c mod_posix: Add deprecation warning for the 'daemonize' option
Kim Alvefur <zash@zash.se>
parents: 10599
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88 daemonize = module:get_option_boolean("daemonize", nil);
25e178edbc2c mod_posix: Add deprecation warning for the 'daemonize' option
Kim Alvefur <zash@zash.se>
parents: 10599
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89 if daemonize ~= nil then
25e178edbc2c mod_posix: Add deprecation warning for the 'daemonize' option
Kim Alvefur <zash@zash.se>
parents: 10599
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90 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
Kim Alvefur <zash@zash.se>
parents: 10599
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91 -- TODO: Write some docs and include a link in the warning.
25e178edbc2c mod_posix: Add deprecation warning for the 'daemonize' option
Kim Alvefur <zash@zash.se>
parents: 10599
diff changeset
92 end
10598
5cf481bee678 mod_posix: Support for command-line flags to override 'daemonize' config option
Matthew Wild <mwild1@gmail.com>
parents: 9763
diff changeset
93 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
94
5175
fabaed7418a6 mod_posix: Remove console and stdout logging sinks before daemonizing
Kim Alvefur <zash@zash.se>
parents: 4993
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95 local function remove_log_sinks()
12977
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Kim Alvefur <zash@zash.se>
parents: 12297
diff changeset
96 local lm = require "prosody.core.loggingmanager";
5175
fabaed7418a6 mod_posix: Remove console and stdout logging sinks before daemonizing
Kim Alvefur <zash@zash.se>
parents: 4993
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97 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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98 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
99 lm.reload_logging();
fabaed7418a6 mod_posix: Remove console and stdout logging sinks before daemonizing
Kim Alvefur <zash@zash.se>
parents: 4993
diff changeset
100 end
fabaed7418a6 mod_posix: Remove console and stdout logging sinks before daemonizing
Kim Alvefur <zash@zash.se>
parents: 4993
diff changeset
101
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
102 if daemonize then
587
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parents:
diff changeset
103 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
104 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
105 remove_log_sinks();
587
43f509a1519a Add mod_posix, fixes #5
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
106 local ok, ret = pposix.daemonize();
43f509a1519a Add mod_posix, fixes #5
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parents:
diff changeset
107 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
108 module:log("error", "Failed to daemonize: %s", ret);
587
43f509a1519a Add mod_posix, fixes #5
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parents:
diff changeset
109 elseif ret and ret > 0 then
43f509a1519a Add mod_posix, fixes #5
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parents:
diff changeset
110 os.exit(0);
43f509a1519a Add mod_posix, fixes #5
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parents:
diff changeset
111 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
112 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
113 write_pidfile();
587
43f509a1519a Add mod_posix, fixes #5
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parents:
diff changeset
114 end
43f509a1519a Add mod_posix, fixes #5
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
115 end
11062
dd3b1b9d867d mod_posix: Daemonize later
Kim Alvefur <zash@zash.se>
parents: 11047
diff changeset
116 module:hook("server-started", daemonize_server)
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
117 else
1032
409f22d0430f mod_posix: Remove pidfile on exit
Matthew Wild <mwild1@gmail.com>
parents: 991
diff changeset
118 -- 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
119 write_pidfile();
587
43f509a1519a Add mod_posix, fixes #5
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parents:
diff changeset
120 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
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121
3537
7bbb19804d82 mod_posix: Updated to use the new events API.
Waqas Hussain <waqas20@gmail.com>
parents: 3481
diff changeset
122 module:hook("server-stopped", remove_pidfile);