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authorErlang/OTP <[email protected]>2009-11-20 14:54:40 +0000
committerErlang/OTP <[email protected]>2009-11-20 14:54:40 +0000
commit84adefa331c4159d432d22840663c38f155cd4c1 (patch)
treebff9a9c66adda4df2106dfd0e5c053ab182a12bd /lib/inets/src/tftp/tftp_sup.erl
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The R13B03 release.OTP_R13B03
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+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2005-2009. 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%
+%%
+%%
+%%----------------------------------------------------------------------
+%% Purpose: The top supervisor for tftp hangs under inets_sup.
+%%----------------------------------------------------------------------
+
+-module(tftp_sup).
+
+-behaviour(supervisor).
+
+%% API
+-export([start_link/1,
+ start_child/1,
+ stop_child/1,
+ which_children/0]).
+
+%% Supervisor callback
+-export([init/1]).
+
+%%%=========================================================================
+%%% API
+%%%=========================================================================
+
+start_link(TftpServices) ->
+ supervisor:start_link({local, ?MODULE}, ?MODULE, [TftpServices]).
+
+start_child(Options) ->
+ KillAfter = default_kill_after(),
+ ChildSpec = worker_spec(KillAfter, Options),
+ supervisor:start_child(?MODULE, ChildSpec).
+
+stop_child(Pid) when is_pid(Pid) ->
+ Children = supervisor:which_children(?MODULE),
+ case [Id || {Id, P, _Type, _Modules} <- Children, P =:= Pid] of
+ [] ->
+ {error, not_found};
+ [Id] ->
+ case supervisor:terminate_child(?MODULE, Id) of
+ ok ->
+ supervisor:delete_child(?MODULE, Id);
+ {error, not_found} ->
+ supervisor:delete_child(?MODULE, Id);
+ {error, Reason} ->
+ {error, Reason}
+ end
+ end.
+
+which_children() ->
+ Children = supervisor:which_children(?MODULE),
+ [{tftpd, Pid} || {_Id, Pid, _Type, _Modules} <- Children, Pid =/= undefined].
+
+%%%=========================================================================
+%%% Supervisor callback
+%%%=========================================================================
+
+init([Services]) when is_list(Services) ->
+ RestartStrategy = one_for_one,
+ MaxR = 10,
+ MaxT = 3600,
+ KillAfter = default_kill_after(),
+ Children = [worker_spec(KillAfter, Options) || {tftpd, Options} <- Services],
+ {ok, {{RestartStrategy, MaxR, MaxT}, Children}}.
+
+%%%=========================================================================
+%%% Internal functions
+%%%=========================================================================
+
+worker_spec(KillAfter, Options) ->
+ Modules = [proc_lib, tftp, tftp_engine],
+ KA = supervisor_timeout(KillAfter),
+ Name = unique_name(Options),
+ {Name, {tftp, start, [Options]}, permanent, KA, worker, Modules}.
+
+unique_name(Options) ->
+ case lists:keysearch(port, 1, Options) of
+ {value, {_, Port}} when is_integer(Port), Port > 0 ->
+ {tftpd, Port};
+ _ ->
+ {tftpd, erlang:now()}
+ end.
+
+default_kill_after() ->
+ timer:seconds(3).
+
+%% supervisor_spec(Name) ->
+%% {Name, {Name, start, []}, permanent, infinity, supervisor,
+%% [Name, supervisor]}.
+
+-ifdef(debug_shutdown).
+supervisor_timeout(_KillAfter) -> timer:hours(24).
+-else.
+supervisor_timeout(KillAfter) -> KillAfter.
+-endif.