/usr/lib/prosody/core/modulemanager.lua is in prosody 0.9.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
local logger = require "util.logger";
local log = logger.init("modulemanager");
local config = require "core.configmanager";
local pluginloader = require "util.pluginloader";
local set = require "util.set";
local new_multitable = require "util.multitable".new;
local hosts = hosts;
local prosody = prosody;
local pcall, xpcall = pcall, xpcall;
local setmetatable, rawget = setmetatable, rawget;
local ipairs, pairs, type, tostring, t_insert = ipairs, pairs, type, tostring, table.insert;
local debug_traceback = debug.traceback;
local unpack, select = unpack, select;
pcall = function(f, ...)
local n = select("#", ...);
local params = {...};
return xpcall(function() return f(unpack(params, 1, n)) end, function(e) return tostring(e).."\n"..debug_traceback(); end);
end
local autoload_modules = {"presence", "message", "iq", "offline", "c2s", "s2s"};
local component_inheritable_modules = {"tls", "dialback", "iq", "s2s"};
-- We need this to let modules access the real global namespace
local _G = _G;
module "modulemanager"
local api = _G.require "core.moduleapi"; -- Module API container
-- [host] = { [module] = module_env }
local modulemap = { ["*"] = {} };
-- Load modules when a host is activated
function load_modules_for_host(host)
local component = config.get(host, "component_module");
local global_modules_enabled = config.get("*", "modules_enabled");
local global_modules_disabled = config.get("*", "modules_disabled");
local host_modules_enabled = config.get(host, "modules_enabled");
local host_modules_disabled = config.get(host, "modules_disabled");
if host_modules_enabled == global_modules_enabled then host_modules_enabled = nil; end
if host_modules_disabled == global_modules_disabled then host_modules_disabled = nil; end
local global_modules = set.new(autoload_modules) + set.new(global_modules_enabled) - set.new(global_modules_disabled);
if component then
global_modules = set.intersection(set.new(component_inheritable_modules), global_modules);
end
local modules = (global_modules + set.new(host_modules_enabled)) - set.new(host_modules_disabled);
-- COMPAT w/ pre 0.8
if modules:contains("console") then
log("error", "The mod_console plugin has been renamed to mod_admin_telnet. Please update your config.");
modules:remove("console");
modules:add("admin_telnet");
end
if component then
load(host, component);
end
for module in modules do
load(host, module);
end
end
prosody.events.add_handler("host-activated", load_modules_for_host);
prosody.events.add_handler("host-deactivated", function (host)
modulemap[host] = nil;
end);
--- Private helpers ---
local function do_unload_module(host, name)
local mod = get_module(host, name);
if not mod then return nil, "module-not-loaded"; end
if module_has_method(mod, "unload") then
local ok, err = call_module_method(mod, "unload");
if (not ok) and err then
log("warn", "Non-fatal error unloading module '%s' on '%s': %s", name, host, err);
end
end
for object, event, handler in mod.module.event_handlers:iter(nil, nil, nil) do
object.remove_handler(event, handler);
end
if mod.module.items then -- remove items
local events = (host == "*" and prosody.events) or hosts[host].events;
for key,t in pairs(mod.module.items) do
for i = #t,1,-1 do
local value = t[i];
t[i] = nil;
events.fire_event("item-removed/"..key, {source = mod.module, item = value});
end
end
end
mod.module.loaded = false;
modulemap[host][name] = nil;
return true;
end
local function do_load_module(host, module_name, state)
if not (host and module_name) then
return nil, "insufficient-parameters";
elseif not hosts[host] and host ~= "*"then
return nil, "unknown-host";
end
if not modulemap[host] then
modulemap[host] = hosts[host].modules;
end
if modulemap[host][module_name] then
log("warn", "%s is already loaded for %s, so not loading again", module_name, host);
return nil, "module-already-loaded";
elseif modulemap["*"][module_name] then
local mod = modulemap["*"][module_name];
if module_has_method(mod, "add_host") then
local _log = logger.init(host..":"..module_name);
local host_module_api = setmetatable({
host = host, event_handlers = new_multitable(), items = {};
_log = _log, log = function (self, ...) return _log(...); end;
},{
__index = modulemap["*"][module_name].module;
});
local host_module = setmetatable({ module = host_module_api }, { __index = mod });
host_module_api.environment = host_module;
modulemap[host][module_name] = host_module;
local ok, result, module_err = call_module_method(mod, "add_host", host_module_api);
if not ok or result == false then
modulemap[host][module_name] = nil;
return nil, ok and module_err or result;
end
return host_module;
end
return nil, "global-module-already-loaded";
end
local _log = logger.init(host..":"..module_name);
local api_instance = setmetatable({ name = module_name, host = host,
_log = _log, log = function (self, ...) return _log(...); end, event_handlers = new_multitable(),
reloading = not not state, saved_state = state~=true and state or nil }
, { __index = api });
local pluginenv = setmetatable({ module = api_instance }, { __index = _G });
api_instance.environment = pluginenv;
local mod, err = pluginloader.load_code(module_name, nil, pluginenv);
if not mod then
log("error", "Unable to load module '%s': %s", module_name or "nil", err or "nil");
return nil, err;
end
api_instance.path = err;
modulemap[host][module_name] = pluginenv;
local ok, err = pcall(mod);
if ok then
-- Call module's "load"
if module_has_method(pluginenv, "load") then
ok, err = call_module_method(pluginenv, "load");
if not ok then
log("warn", "Error loading module '%s' on '%s': %s", module_name, host, err or "nil");
end
end
api_instance.reloading, api_instance.saved_state = nil, nil;
if api_instance.host == "*" then
if not api_instance.global then -- COMPAT w/pre-0.9
if host ~= "*" then
log("warn", "mod_%s: Setting module.host = '*' deprecated, call module:set_global() instead", module_name);
end
api_instance:set_global();
end
modulemap[host][module_name] = nil;
modulemap[api_instance.host][module_name] = pluginenv;
if host ~= api_instance.host and module_has_method(pluginenv, "add_host") then
-- Now load the module again onto the host it was originally being loaded on
ok, err = do_load_module(host, module_name);
end
end
end
if not ok then
modulemap[api_instance.host][module_name] = nil;
log("error", "Error initializing module '%s' on '%s': %s", module_name, host, err or "nil");
end
return ok and pluginenv, err;
end
local function do_reload_module(host, name)
local mod = get_module(host, name);
if not mod then return nil, "module-not-loaded"; end
local _mod, err = pluginloader.load_code(name); -- checking for syntax errors
if not _mod then
log("error", "Unable to load module '%s': %s", name or "nil", err or "nil");
return nil, err;
end
local saved;
if module_has_method(mod, "save") then
local ok, ret, err = call_module_method(mod, "save");
if ok then
saved = ret;
else
log("warn", "Error saving module '%s:%s' state: %s", host, name, ret);
if not config.get(host, "force_module_reload") then
log("warn", "Aborting reload due to error, set force_module_reload to ignore this");
return nil, "save-state-failed";
else
log("warn", "Continuing with reload (using the force)");
end
end
end
mod.module.reloading = true;
do_unload_module(host, name);
local ok, err = do_load_module(host, name, saved or true);
if ok then
mod = get_module(host, name);
if module_has_method(mod, "restore") then
local ok, err = call_module_method(mod, "restore", saved or {})
if (not ok) and err then
log("warn", "Error restoring module '%s' from '%s': %s", name, host, err);
end
end
end
return ok and mod, err;
end
--- Public API ---
-- Load a module and fire module-loaded event
function load(host, name)
local mod, err = do_load_module(host, name);
if mod then
(hosts[mod.module.host] or prosody).events.fire_event("module-loaded", { module = name, host = mod.module.host });
end
return mod, err;
end
-- Unload a module and fire module-unloaded
function unload(host, name)
local ok, err = do_unload_module(host, name);
if ok then
(hosts[host] or prosody).events.fire_event("module-unloaded", { module = name, host = host });
end
return ok, err;
end
function reload(host, name)
local mod, err = do_reload_module(host, name);
if mod then
modulemap[host][name].module.reloading = true;
(hosts[host] or prosody).events.fire_event("module-reloaded", { module = name, host = host });
mod.module.reloading = nil;
elseif not is_loaded(host, name) then
(hosts[host] or prosody).events.fire_event("module-unloaded", { module = name, host = host });
end
return mod, err;
end
function get_module(host, name)
return modulemap[host] and modulemap[host][name];
end
function get_items(key, host)
local result = {};
local modules = modulemap[host];
if not key or not host or not modules then return nil; end
for _, module in pairs(modules) do
local mod = module.module;
if mod.items and mod.items[key] then
for _, value in ipairs(mod.items[key]) do
t_insert(result, value);
end
end
end
return result;
end
function get_modules(host)
return modulemap[host];
end
function is_loaded(host, name)
return modulemap[host] and modulemap[host][name] and true;
end
function module_has_method(module, method)
return type(rawget(module.module, method)) == "function";
end
function call_module_method(module, method, ...)
local f = rawget(module.module, method);
if type(f) == "function" then
return pcall(f, ...);
else
return false, "no-such-method";
end
end
return _M;
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