Annotate

plugins/mod_posix.lua @ 9952:6402bc76f51a 0.11

net.dns: Close resolv.conf handle when done (fixes #1342)
author Kim Alvefur <zash@zash.se>
date Sat, 13 Apr 2019 18:16:28 +0200
parent 9763:982529dd0bed
child 9927:1460c4966262
child 10598:5cf481bee678
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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2 -- Copyright (C) 2008-2010 Matthew Wild
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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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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
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9
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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");
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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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cda9db4b881d loggingmanager, mod_posix: Import util.format correctly (fixes #985)
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23 local format = require "util.format".format;
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24 local lfs = require "lfs";
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25 local stat = lfs.attributes;
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26
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27 local prosody = _G.prosody;
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28
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29 module:set_global(); -- we're a global module
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30
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31 local umask = module:get_option_string("umask", "027");
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32 pposix.umask(umask);
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33
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34 -- Allow switching away from root, some people like strange ports.
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35 module:hook("server-started", function ()
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36 local uid = module:get_option("setuid");
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37 local gid = module:get_option("setgid");
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38 if gid then
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39 local success, msg = pposix.setgid(gid);
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40 if success then
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41 module:log("debug", "Changed group to %s successfully.", gid);
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42 else
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43 module:log("error", "Failed to change group to %s. Error: %s", gid, msg);
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44 prosody.shutdown("Failed to change group to %s", gid);
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45 end
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46 end
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47 if uid then
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48 local success, msg = pposix.setuid(uid);
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49 if success then
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50 module:log("debug", "Changed user to %s successfully.", uid);
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51 else
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52 module:log("error", "Failed to change user to %s. Error: %s", uid, msg);
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53 prosody.shutdown("Failed to change user to %s", uid);
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54 end
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55 end
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56 end);
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57
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58 -- Don't even think about it!
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59 if not prosody.start_time then -- server-starting
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60 local suid = module:get_option("setuid");
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61 if not suid or suid == 0 or suid == "root" then
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62 if pposix.getuid() == 0 and not module:get_option_boolean("run_as_root") then
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63 module:log("error", "Danger, Will Robinson! Prosody doesn't need to be run as root, so don't do it!");
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64 module:log("error", "For more information on running Prosody as root, see https://prosody.im/doc/root");
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65 prosody.shutdown("Refusing to run as root");
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66 end
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67 end
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68 end
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69
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70 local pidfile;
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71 local pidfile_handle;
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72
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73 local function remove_pidfile()
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74 if pidfile_handle then
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75 pidfile_handle:close();
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76 os.remove(pidfile);
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77 pidfile, pidfile_handle = nil, nil;
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78 end
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79 end
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80
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81 local function write_pidfile()
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82 if pidfile_handle then
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83 remove_pidfile();
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84 end
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51396e0836cf mod_posix: Use path variant of config API for pidfile option
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85 pidfile = module:get_option_path("pidfile", nil, "data");
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86 if pidfile then
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Waqas Hussain <waqas20@gmail.com>
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87 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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88 local mode = stat(pidfile) and "r+" or "w+";
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89 pidfile_handle, err = io.open(pidfile, mode);
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90 if not pidfile_handle then
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91 module:log("error", "Couldn't write pidfile at %s; %s", pidfile, err);
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92 prosody.shutdown("Couldn't write pidfile");
991
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diff changeset
93 else
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94 if not lfs.lock(pidfile_handle, "w") then -- Exclusive lock
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95 local other_pid = pidfile_handle:read("*a");
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96 module:log("error", "Another Prosody instance seems to be running with PID %s, quitting", other_pid);
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97 pidfile_handle = nil;
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98 prosody.shutdown("Prosody already running");
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99 else
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a8a3e662fea7 mod_posix: Some (perhaps temporary) changes to re-lock the pidfile after truncating, to avoid breaking prosodyctl
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100 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.
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parents: 3029
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101 pidfile_handle, err = io.open(pidfile, "w+");
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102 if not pidfile_handle then
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diff changeset
103 module:log("error", "Couldn't write pidfile at %s; %s", pidfile, err);
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parents: 3029
diff changeset
104 prosody.shutdown("Couldn't write pidfile");
3341
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parents: 3340
diff changeset
105 else
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parents: 3340
diff changeset
106 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
diff changeset
107 pidfile_handle:write(tostring(pposix.getpid()));
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108 pidfile_handle:flush();
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109 end
3340
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parents: 3029
diff changeset
110 end
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111 end
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112 end
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113 end
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114 end
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115
3540
bc139431830b Monster whitespace commit (beware the whitespace monster).
Waqas Hussain <waqas20@gmail.com>
parents: 3537
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116 local syslog_opened;
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39188851811c mod_posix: Ignore currently unused argument [luacheck]
Kim Alvefur <zash@zash.se>
parents: 8166
diff changeset
117 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
118 if not syslog_opened then
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25ce7720555f mod_posix: Support syslog_facility config option
Matthew Wild <mwild1@gmail.com>
parents: 3555
diff changeset
119 pposix.syslog_open("prosody", module:get_option_string("syslog_facility"));
1033
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parents: 1032
diff changeset
120 syslog_opened = true;
991
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diff changeset
121 end
8226
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Waqas Hussain <waqas20@gmail.com>
parents: 8167
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122 local syslog = pposix.syslog_log;
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4a9f0d482028 mod_posix: Integrate with loggingmanager, register syslog sink, remove redundant logging code
Matthew Wild <mwild1@gmail.com>
parents: 1032
diff changeset
123 return function (name, level, message, ...)
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parents: 8167
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124 syslog(level, name, format(message, ...));
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bc139431830b Monster whitespace commit (beware the whitespace monster).
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parents: 3537
diff changeset
125 end;
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Matthew Wild <mwild1@gmail.com>
parents: 735
diff changeset
126 end
1033
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Matthew Wild <mwild1@gmail.com>
parents: 1032
diff changeset
127 require "core.loggingmanager".register_sink_type("syslog", syslog_sink_maker);
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Matthew Wild <mwild1@gmail.com>
parents: 735
diff changeset
128
6002
3547f315a1f5 mod_posix: Daemonize by default only when installed
Kim Alvefur <zash@zash.se>
parents: 5776
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129 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
130
5175
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Kim Alvefur <zash@zash.se>
parents: 4993
diff changeset
131 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
132 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
133 lm.register_sink_type("console", nil);
fabaed7418a6 mod_posix: Remove console and stdout logging sinks before daemonizing
Kim Alvefur <zash@zash.se>
parents: 4993
diff changeset
134 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
135 lm.reload_logging();
fabaed7418a6 mod_posix: Remove console and stdout logging sinks before daemonizing
Kim Alvefur <zash@zash.se>
parents: 4993
diff changeset
136 end
fabaed7418a6 mod_posix: Remove console and stdout logging sinks before daemonizing
Kim Alvefur <zash@zash.se>
parents: 4993
diff changeset
137
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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
138 if daemonize then
587
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Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
139 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
140 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
141 remove_log_sinks();
587
43f509a1519a Add mod_posix, fixes #5
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
142 local ok, ret = pposix.daemonize();
43f509a1519a Add mod_posix, fixes #5
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
143 if not ok then
1062
f9a1ac50782b mod_posix: Fix calls to log() (replace with module:log) and make some global accesses explicit
Matthew Wild <mwild1@gmail.com>
parents: 1061
diff changeset
144 module:log("error", "Failed to daemonize: %s", ret);
587
43f509a1519a Add mod_posix, fixes #5
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
145 elseif ret and ret > 0 then
43f509a1519a Add mod_posix, fixes #5
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
146 os.exit(0);
43f509a1519a Add mod_posix, fixes #5
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
147 else
1062
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Matthew Wild <mwild1@gmail.com>
parents: 1061
diff changeset
148 module:log("info", "Successfully daemonized to PID %d", pposix.getpid());
991
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Matthew Wild <mwild1@gmail.com>
parents: 735
diff changeset
149 write_pidfile();
587
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Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
150 end
43f509a1519a Add mod_posix, fixes #5
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
151 end
3022
948d511f479c mod_posix: Don't add a server-starting event handler while the server-starting event is being fired.
Waqas Hussain <waqas20@gmail.com>
parents: 2925
diff changeset
152 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
153 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
154 end
991
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Matthew Wild <mwild1@gmail.com>
parents: 735
diff changeset
155 else
1032
409f22d0430f mod_posix: Remove pidfile on exit
Matthew Wild <mwild1@gmail.com>
parents: 991
diff changeset
156 -- 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
157 write_pidfile();
587
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Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
158 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
159
3537
7bbb19804d82 mod_posix: Updated to use the new events API.
Waqas Hussain <waqas20@gmail.com>
parents: 3481
diff changeset
160 module:hook("server-stopped", remove_pidfile);
1032
409f22d0430f mod_posix: Remove pidfile on exit
Matthew Wild <mwild1@gmail.com>
parents: 991
diff changeset
161
1118
239d4362a040 mod_posix: Reload the config and reopen log files on SIGHUP
Matthew Wild <mwild1@gmail.com>
parents: 1092
diff changeset
162 -- Set signal handlers
6875
12d68f7b1be0 mod_posix: Detect failure to load util.signal by first pcall return value not by type of the second
Kim Alvefur <zash@zash.se>
parents: 6874
diff changeset
163 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
164 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
165 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
166 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
167 prosody.unlock_globals();
a7a9d9511dc1 mod_posix: Delay setting signal handlers until in the main thread
Matthew Wild <mwild1@gmail.com>
parents: 8235
diff changeset
168 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
169 prosody.lock_globals();
a7a9d9511dc1 mod_posix: Delay setting signal handlers until in the main thread
Matthew Wild <mwild1@gmail.com>
parents: 8235
diff changeset
170 end);
1118
239d4362a040 mod_posix: Reload the config and reopen log files on SIGHUP
Matthew Wild <mwild1@gmail.com>
parents: 1092
diff changeset
171
8663
a7a9d9511dc1 mod_posix: Delay setting signal handlers until in the main thread
Matthew Wild <mwild1@gmail.com>
parents: 8235
diff changeset
172 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
173 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
174 prosody.reload_config();
9763
982529dd0bed mod_posix: Don't reload logging twice
Kim Alvefur <zash@zash.se>
parents: 8663
diff changeset
175 -- 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
176 end);
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 5452
diff changeset
177
8663
a7a9d9511dc1 mod_posix: Delay setting signal handlers until in the main thread
Matthew Wild <mwild1@gmail.com>
parents: 8235
diff changeset
178 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
179 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
180 prosody.unlock_globals();
a7a9d9511dc1 mod_posix: Delay setting signal handlers until in the main thread
Matthew Wild <mwild1@gmail.com>
parents: 8235
diff changeset
181 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
182 prosody.lock_globals();
a7a9d9511dc1 mod_posix: Delay setting signal handlers until in the main thread
Matthew Wild <mwild1@gmail.com>
parents: 8235
diff changeset
183 end);
2332
7772dde4010b mod_posix: Catch SIGINT
Matthew Wild <mwild1@gmail.com>
parents: 2074
diff changeset
184 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
185 end