%%%----------------------------------------------------------------------
%%% File : ejabberd.erl
%%% Author : Alexey Shchepin <alexey@process-one.net>
%%% Purpose : ejabberd wrapper: start / stop
%%% Created : 16 Nov 2002 by Alexey Shchepin <alexey@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2021 ProcessOne
%%%
%%% This program is free software; you can redistribute it and/or
%%% modify it under the terms of the GNU General Public License as
%%% published by the Free Software Foundation; either version 2 of the
%%% License, or (at your option) any later version.
%%%
%%% This program is distributed in the hope that it will be useful,
%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
%%% General Public License for more details.
%%%
%%% You should have received a copy of the GNU General Public License along
%%% with this program; if not, write to the Free Software Foundation, Inc.,
%%% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
%%%
%%%----------------------------------------------------------------------
-module(ejabberd).
-author('alexey@process-one.net').
-compile({no_auto_import, [{halt, 0}]}).
-protocol({xep, 4, '2.9'}).
-protocol({xep, 86, '1.0'}).
-protocol({xep, 106, '1.1'}).
-protocol({xep, 170, '1.0'}).
-protocol({xep, 205, '1.0'}).
-protocol({xep, 212, '1.0'}).
-protocol({xep, 216, '1.0'}).
-protocol({xep, 243, '1.0'}).
-protocol({xep, 270, '1.0'}).
-export([start/0, stop/0, halt/0, start_app/1, start_app/2,
get_pid_file/0, check_apps/0, module_name/1, is_loaded/0]).
-include("logger.hrl").
start() ->
application:ensure_all_started(ejabberd).
stop() ->
application:stop(ejabberd).
halt() ->
ejabberd_logger:flush(),
erlang:halt(1, [{flush, true}]).
%% @spec () -> false | string()
get_pid_file() ->
case os:getenv("EJABBERD_PID_PATH") of
false ->
false;
"" ->
false;
Path ->
Path
end.
start_app(App) ->
start_app(App, temporary).
start_app(App, Type) ->
StartFlag = not is_loaded(),
start_app(App, Type, StartFlag).
is_loaded() ->
Apps = application:which_applications(),
lists:keymember(ejabberd, 1, Apps).
start_app(App, Type, StartFlag) when is_atom(App) ->
start_app([App], Type, StartFlag);
start_app([App|Apps], Type, StartFlag) ->
case application:start(App,Type) of
ok ->
start_app(Apps, Type, StartFlag);
{error, {already_started, _}} ->
start_app(Apps, Type, StartFlag);
{error, {not_started, DepApp}} ->
case lists:member(DepApp, [App|Apps]) of
true ->
Reason = io_lib:format(
"Failed to start Erlang application '~ts': "
"circular dependency with '~ts' detected",
[App, DepApp]),
exit_or_halt(Reason, StartFlag);
false ->
start_app([DepApp,App|Apps], Type, StartFlag)
end;
{error, Why} ->
Reason = io_lib:format(
"Failed to start Erlang application '~ts': ~ts. ~ts",
[App, format_error(Why), hint()]),
exit_or_halt(Reason, StartFlag)
end;
start_app([], _Type, _StartFlag) ->
ok.
check_app_modules(App, StartFlag) ->
case application:get_key(App, modules) of
{ok, Mods} ->
lists:foreach(
fun(Mod) ->
case code:which(Mod) of
non_existing ->
File = get_module_file(App, Mod),
Reason = io_lib:format(
"Couldn't find file ~ts needed "
"for Erlang application '~ts'. ~ts",
[File, App, hint()]),
exit_or_halt(Reason, StartFlag);
_ ->
ok
end
end, Mods);
_ ->
%% No modules? This is strange
ok
end.
check_apps() ->
spawn(
fun() ->
Apps = [ejabberd |
[App || {App, _, _} <- application:which_applications(),
App /= ejabberd]],
?DEBUG("Checking consistency of applications: ~ts",
[misc:join_atoms(Apps, <<", ">>)]),
misc:peach(
fun(App) ->
check_app_modules(App, true)
end, Apps),
?DEBUG("All applications are intact", []),
lists:foreach(fun erlang:garbage_collect/1, processes())
end).
-spec exit_or_halt(iodata(), boolean()) -> no_return().
exit_or_halt(Reason, StartFlag) ->
?CRITICAL_MSG(Reason, []),
if StartFlag ->
%% Wait for the critical message is written in the console/log
halt();
true ->
erlang:error(application_start_failed)
end.
get_module_file(App, Mod) ->
BaseName = atom_to_list(Mod),
case code:lib_dir(App, ebin) of
{error, _} ->
BaseName;
Dir ->
filename:join([Dir, BaseName ++ ".beam"])
end.
module_name([Dir, _, <<H,_/binary>> | _] = Mod) when H >= 65, H =< 90 ->
Module = str:join([elixir_name(M) || M<-tl(Mod)], <<>>),
Prefix = case elixir_name(Dir) of
<<"Ejabberd">> -> <<"Elixir.Ejabberd.">>;
Lib -> <<"Elixir.Ejabberd.", Lib/binary, ".">>
end,
misc:binary_to_atom(<<Prefix/binary, Module/binary>>);
module_name([<<"ejabberd">> | _] = Mod) ->
Module = str:join([erlang_name(M) || M<-Mod], $_),
misc:binary_to_atom(Module);
module_name(Mod) when is_list(Mod) ->
Module = str:join([erlang_name(M) || M<-tl(Mod)], $_),
misc:binary_to_atom(Module).
elixir_name(Atom) when is_atom(Atom) ->
elixir_name(misc:atom_to_binary(Atom));
elixir_name(<<H,T/binary>>) when H >= 65, H =< 90 ->
<<H, T/binary>>;
elixir_name(<<H,T/binary>>) ->
<<(H-32), T/binary>>.
erlang_name(Atom) when is_atom(Atom) ->
misc:atom_to_binary(Atom);
erlang_name(Bin) when is_binary(Bin) ->
Bin.
format_error({Reason, File}) when is_list(Reason), is_list(File) ->
Reason ++ ": " ++ File;
format_error(Term) ->
io_lib:format("~p", [Term]).
hint() ->
"This usually means that ejabberd or Erlang "
"was compiled/installed incorrectly.".
