%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2008-2015. 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: Print some info of a running ssh aplication.
%%----------------------------------------------------------------------
-module(ssh_info).
-compile(export_all).
print() ->
try supervisor:which_children(ssh_sup)
of
_ ->
io:nl(),
print_general(),
io:nl(),
underline("Client part", $=),
print_clients(),
io:nl(),
underline("Server part", $=),
print_servers(),
io:nl(),
%% case os:type() of
%% {unix,_} ->
%% io:nl(),
%% underline("Linux part", $=),
%% underline("Listening"),
%% catch io:format(os:cmd("netstat -tpln")),
%% io:nl(),
%% underline("Other"),
%% catch io:format(os:cmd("netstat -tpn"));
%% _ -> ok
%% end,
underline("Supervisors", $=),
walk_sups(ssh_sup),
io:nl()
catch
_:_ ->
io:format("Ssh not found~n",[])
end.
%%%================================================================
print_general() ->
{_Name, Slogan, Ver} = lists:keyfind(ssh,1,application:which_applications()),
underline(io_lib:format("~s ~s", [Slogan, Ver]), $=),
io:format('This printout is generated ~s. ~n',[datetime()]).
%%%================================================================
print_clients() ->
try
lists:foreach(fun print_client/1, supervisor:which_children(sshc_sup))
catch
C:E ->
io:format('***FAILED: ~p:~p~n',[C,E])
end.
print_client({undefined,Pid,supervisor,[ssh_connection_handler]}) ->
{{Local,Remote},_Str} = ssh_connection_handler:get_print_info(Pid),
io:format(" Local=~s Remote=~s~n",[fmt_host_port(Local),fmt_host_port(Remote)]);
print_client(Other) ->
io:format(" [[Other 1: ~p]]~n",[Other]).
%%%================================================================
print_servers() ->
try
lists:foreach(fun print_server/1, supervisor:which_children(sshd_sup))
catch
C:E ->
io:format('***FAILED: ~p:~p~n',[C,E])
end.
print_server({{server,ssh_system_sup,LocalHost,LocalPort},Pid,supervisor,[ssh_system_sup]}) when is_pid(Pid) ->
io:format('Local=~s (~p children)~n',[fmt_host_port({LocalHost,LocalPort}),
ssh_acceptor:number_of_connections(Pid)]),
lists:foreach(fun print_system_sup/1, supervisor:which_children(Pid));
print_server(Other) ->
io:format(" [[Other 2: ~p]]~n",[Other]).
print_system_sup({Ref,Pid,supervisor,[ssh_subsystem_sup]}) when is_reference(Ref),
is_pid(Pid) ->
lists:foreach(fun print_channels/1, supervisor:which_children(Pid));
print_system_sup({{ssh_acceptor_sup,LocalHost,LocalPort}, Pid,supervisor, [ssh_acceptor_sup]}) when is_pid(Pid) ->
io:format(" [Acceptor for ~s]~n",[fmt_host_port({LocalHost,LocalPort})]);
print_system_sup(Other) ->
io:format(" [[Other 3: ~p]]~n",[Other]).
print_channels({{server,ssh_channel_sup,_,_},Pid,supervisor,[ssh_channel_sup]}) when is_pid(Pid) ->
lists:foreach(fun print_channel/1, supervisor:which_children(Pid));
print_channels(Other) ->
io:format(" [[Other 4: ~p]]~n",[Other]).
print_channel({Ref,Pid,worker,[ssh_channel]}) when is_reference(Ref),
is_pid(Pid) ->
{{ConnManager,ChannelID}, Str} = ssh_channel:get_print_info(Pid),
{{Local,Remote},StrM} = ssh_connection_handler:get_print_info(ConnManager),
io:format(' ch ~p: ~s ~s',[ChannelID, StrM, Str]),
io:format(" Local=~s Remote=~s~n",[fmt_host_port(Local),fmt_host_port(Remote)]);
print_channel(Other) ->
io:format(" [[Other 5: ~p]]~n",[Other]).
%%%================================================================
-define(inc(N), (N+4)).
walk_sups(StartPid) ->
io:format("Start at ~p, ~s.~n",[StartPid,dead_or_alive(StartPid)]),
walk_sups(children(StartPid), _Indent=?inc(0)).
walk_sups([H={_,Pid,SupOrWorker,_}|T], Indent) ->
indent(Indent), io:format('~200p ~p is ~s~n',[H,Pid,dead_or_alive(Pid)]),
case SupOrWorker of
supervisor -> walk_sups(children(Pid), ?inc(Indent));
_ -> ok
end,
walk_sups(T, Indent);
walk_sups([], _) ->
ok.
dead_or_alive(Name) when is_atom(Name) ->
case whereis(Name) of
undefined ->
"**UNDEFINED**";
Pid ->
dead_or_alive(Pid)
end;
dead_or_alive(Pid) when is_pid(Pid) ->
case process_info(Pid) of
undefined -> "**DEAD**";
_ -> "alive"
end.
indent(I) -> io:format('~*c',[I,$ ]).
children(Pid) ->
Parent = self(),
Helper = spawn(fun() ->
Parent ! {self(),supervisor:which_children(Pid)}
end),
receive
{Helper,L} when is_list(L) ->
L
after
2000 ->
catch exit(Helper, kill),
[]
end.
%%%================================================================
underline(Str) ->
underline(Str, $-).
underline(Str, LineChar) ->
Len = lists:flatlength(Str),
io:format('~s~n',[Str]),
line(Len,LineChar).
line(Len, Char) ->
io:format('~*c~n', [Len,Char]).
datetime() ->
%% Adapt to new OTP 18 erlang time API and be back-compatible
TimeStamp = try
erlang:timestamp()
catch
error:undef ->
erlang:now()
end,
{{YYYY,MM,DD}, {H,M,S}} = calendar:now_to_universal_time(TimeStamp),
lists:flatten(io_lib:format('~4w-~2..0w-~2..0w ~2..0w:~2..0w:~2..0w UTC',[YYYY,MM,DD, H,M,S])).
fmt_host_port({{A,B,C,D},Port}) -> io_lib:format('~p.~p.~p.~p:~p',[A,B,C,D,Port]);
fmt_host_port({Host,Port}) -> io_lib:format('~s:~p',[Host,Port]).
nyi() ->
io:format('Not yet implemented~n',[]),
nyi.
