%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1996-2010. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%%
%% %CopyrightEnd%
%%
-module(sasl).
%% External exports
-export([start/2, stop/1]).
%% Internal exports
-export([init/1, pred/1]).
%%%-----------------------------------------------------------------
%%% This module implements the application SASL,
%%% and a supervisor for SASL.
%%%-----------------------------------------------------------------
-behaviour(application).
-record(state, {sasl_error_logger, error_logger_mf}).
start(_, []) ->
Handler = get_sasl_error_logger(),
Type = get_sasl_error_logger_type(),
Mf = get_error_logger_mf(),
add_sasl_error_logger(Handler, Type),
add_error_logger_mf(Mf),
State = #state{sasl_error_logger = Handler, error_logger_mf = Mf},
case supervisor:start_link({local, sasl_sup}, sasl, []) of
{ok, Pid} -> {ok, Pid, State};
Error -> Error
end.
stop(State) ->
delete_sasl_error_logger(State#state.sasl_error_logger),
delete_error_logger_mf(State#state.error_logger_mf).
%%-----------------------------------------------------------------
%% Internal functions
%%-----------------------------------------------------------------
get_sasl_error_logger() ->
case application:get_env(sasl, sasl_error_logger) of
{ok, false} -> undefined;
{ok, tty} -> tty;
{ok, {file, File}} when is_list(File) -> {file, File};
{ok, Bad} -> exit({bad_config, {sasl, {sasl_error_logger, Bad}}});
_ -> undefined
end.
get_sasl_error_logger_type() ->
case application:get_env(sasl, errlog_type) of
{ok, error} -> error;
{ok, progress} -> progress;
{ok, all} -> all;
{ok, Bad} -> exit({bad_config, {sasl, {errlog_type, Bad}}});
_ -> all
end.
get_error_logger_mf() ->
case catch get_mf() of
{'EXIT', Reason} ->
exit(Reason);
Mf ->
Mf
end.
get_mf() ->
Dir = get_mf_dir(),
MaxB = get_mf_maxb(),
MaxF = get_mf_maxf(),
{Dir, MaxB, MaxF}.
get_mf_dir() ->
case application:get_env(sasl, error_logger_mf_dir) of
{ok, false} -> throw(undefined);
{ok, Dir} when is_list(Dir) -> Dir;
undefined -> throw(undefined);
{ok, Bad} -> exit({bad_config, {sasl, {error_logger_mf_dir, Bad}}})
end.
get_mf_maxb() ->
case application:get_env(sasl, error_logger_mf_maxbytes) of
{ok, MaxB} when is_integer(MaxB) -> MaxB;
undefined -> throw(undefined);
{ok, Bad} -> exit({bad_config, {sasl, {error_logger_mf_maxbytes, Bad}}})
end.
get_mf_maxf() ->
case application:get_env(sasl, error_logger_mf_maxfiles) of
{ok, MaxF} when is_integer(MaxF), MaxF > 0, MaxF < 256 -> MaxF;
undefined -> throw(undefined);
{ok, Bad} -> exit({bad_config, {sasl, {error_logger_mf_maxfiles, Bad}}})
end.
add_sasl_error_logger(undefined, _Type) -> ok;
add_sasl_error_logger(Handler, Type) ->
error_logger:add_report_handler(mod(Handler), args(Handler, Type)).
delete_sasl_error_logger(undefined) -> ok;
delete_sasl_error_logger(Type) ->
error_logger:delete_report_handler(mod(Type)).
mod(tty) -> sasl_report_tty_h;
mod({file, _File}) -> sasl_report_file_h.
args({file, File}, Type) -> {File, type(Type)};
args(_, Type) -> type(Type).
type(error) -> error;
type(progress) -> progress;
type(_) -> all.
add_error_logger_mf(undefined) -> ok;
add_error_logger_mf({Dir, MaxB, MaxF}) ->
error_logger:add_report_handler(
log_mf_h, log_mf_h:init(Dir, MaxB, MaxF, fun pred/1)).
delete_error_logger_mf(undefined) -> ok;
delete_error_logger_mf(_) ->
error_logger:delete_report_handler(log_mf_h).
pred({_Type, GL, _Msg}) when node(GL) =/= node() -> false;
pred(_) -> true.
%%%-----------------------------------------------------------------
%%% supervisor functionality
%%%-----------------------------------------------------------------
init([]) ->
SupFlags = {one_for_one, 0, 1},
%% Reboot node if release_handler crashes!
SafeSupervisor = {sasl_safe_sup,
{supervisor, start_link,
[{local, sasl_safe_sup}, ?MODULE, safe]},
permanent, infinity, supervisor, [?MODULE]},
ReleaseH = {release_handler,
{release_handler, start_link, []},
permanent, 2000, worker, []}, % Note! [] for modules! We
% can't change code on r_h
% this way!!
{ok, {SupFlags, [SafeSupervisor, ReleaseH]}};
init(safe) ->
SupFlags = {one_for_one, 4, 3600},
AlarmH = {alarm_handler,
{alarm_handler, start_link, []},
permanent, 2000, worker, dynamic},
Overload = {overload,
{overload, start_link, []},
permanent, 2000, worker, [overload]},
{ok, {SupFlags, [AlarmH, Overload]}}.
