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xmpp.chapril.org-ejabberd/src/ejabberd_piefxis.erl
Evgeniy Khramtsov fb6267f38e Add config validation at startup
2015-06-01 15:38:27 +03:00

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%%%----------------------------------------------------------------------
%%% File : ejabberd_piefxis.erl
%%% Author : Pablo Polvorin, Vidal Santiago Martinez
%%% Purpose : XEP-0227: Portable Import/Export Format for XMPP-IM Servers
%%% Created : 17 Jul 2008 by Pablo Polvorin <pablo.polvorin@process-one.net>
%%%-------------------------------------------------------------------
%%% @author Evgeniy Khramtsov <ekhramtsov@process-one.net>
%%% @copyright (C) 2012, Evgeniy Khramtsov
%%% @doc
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2015 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.
%%%
%%%----------------------------------------------------------------------
%%% Not implemented:
%%% - write mod_piefxis with ejabberdctl commands
%%% - Export from mod_offline_odbc.erl
%%% - Export from mod_private_odbc.erl
%%% - XEP-227: 6. Security Considerations
%%% - Other schemas of XInclude are not tested, and may not be imported correctly.
%%% - If a host has many users, split that host in XML files with 50 users each.
%%%% Headers
-module(ejabberd_piefxis).
-behaviour(ejabberd_config).
-protocol({xep, 227, '1.0'}).
-export([import_file/1, export_server/1, export_host/2,
opt_type/1]).
-define(CHUNK_SIZE, 1024*20). %20k
-include("ejabberd.hrl").
-include("logger.hrl").
-include("jlib.hrl").
-include("mod_privacy.hrl").
-include("mod_roster.hrl").
%%-include_lib("exmpp/include/exmpp.hrl").
%%-include_lib("exmpp/include/exmpp_client.hrl").
%% Copied from exmpp header files:
%% Copied from mod_private.erl
%%-define(ERROR_MSG(M,Args),io:format(M,Args)).
%%-define(INFO_MSG(M,Args),ok).
%%%==================================
%%%% Import file
-define(NS_PIE, <<"urn:xmpp:pie:0">>).
-define(NS_PIEFXIS, <<"http://www.xmpp.org/extensions/xep-0227.html#ns">>).
-define(NS_XI, <<"http://www.w3.org/2001/XInclude">>).
-record(state, {xml_stream_state :: xml_stream:xml_stream_state(),
user = <<"">> :: binary(),
server = <<"">> :: binary(),
fd :: file:io_device(),
dir = <<"">> :: binary()}).
-type state() :: #state{}.
%%File could be large.. we read it in chunks
%%%===================================================================
%%% API
%%%===================================================================
import_file(FileName) ->
import_file(FileName, #state{}).
-spec import_file(binary(), state()) -> ok | {error, atom()}.
import_file(FileName, State) ->
case file:open(FileName, [read, binary]) of
{ok, Fd} ->
Dir = filename:dirname(FileName),
XMLStreamState = xml_stream:new(self(), infinity),
Res = process(State#state{xml_stream_state = XMLStreamState,
fd = Fd,
dir = Dir}),
file:close(Fd),
Res;
{error, Reason} ->
ErrTxt = file:format_error(Reason),
?ERROR_MSG("Failed to open file '~s': ~s", [FileName, ErrTxt]),
{error, Reason}
end.
%%%==================================
%%%% Process Elements
%%%==================================
%%%% Process Element
%%%==================================
%%%% Add user
%% @spec (El::xmlel(), Domain::string(), User::binary(), Password::binary() | none)
%% -> ok | {error, ErrorText::string()}
%% @doc Add a new user to the database.
%% If user already exists, it will be only updated.
-spec export_server(binary()) -> any().
%% @spec (User::string(), Password::string(), Domain::string())
%% -> ok | {atomic, exists} | {error, not_allowed}
%% @doc Create a new user
export_server(Dir) ->
export_hosts(?MYHOSTS, Dir).
%%%==================================
%%%% Populate user
%% @spec (User::string(), Domain::string(), El::xml())
%% -> ok | {error, not_found}
%%
%% @doc Add a new user from a XML file with a roster list.
%%
%% Example of a file:
%% ```
%% <?xml version='1.0' encoding='UTF-8'?>
%% <server-data xmlns='http://www.xmpp.org/extensions/xep-0227.html#ns'>
%% <host jid='localhost'>
%% <user name='juliet' password='s3crEt'>
%% <query xmlns='jabber:iq:roster'>
%% <item jid='romeo@montague.net'
%% name='Romeo'
%% subscription='both'>
%% <group>Friends</group>
%% </item>
%% </query>
%% </user>
%% </host>
%% </server-data>
%% '''
-spec export_host(binary(), binary()) -> any().
export_host(Dir, Host) ->
export_hosts([Host], Dir).
%% @spec User = String with the user name
%% Domain = String with a domain name
%% El = Sub XML element with vCard tags values
%% @ret ok | {error, not_found}
%% @doc Read vcards from the XML and send it to the server
%%
%% Example:
%% ```
%% <?xml version='1.0' encoding='UTF-8'?>
%% <server-data xmlns='http://www.xmpp.org/extensions/xep-0227.html#ns'>
%% <host jid='localhost'>
%% <user name='admin' password='s3crEt'>
%% <vCard xmlns='vcard-temp'>
%% <FN>Admin</FN>
%% </vCard>
%% </user>
%% </host>
%% </server-data>
%% '''
%%%===================================================================
%%% Internal functions
%%%===================================================================
export_hosts(Hosts, Dir) ->
FnT = make_filename_template(),
DFn = make_main_basefilename(Dir, FnT),
case file:open(DFn, [raw, write]) of
{ok, Fd} ->
print(Fd, make_piefxis_xml_head()),
print(Fd, make_piefxis_server_head()),
FilesAndHosts = [{make_host_filename(FnT, Host), Host}
|| Host <- Hosts],
lists:foreach(
fun({FnH, _}) ->
print(Fd, make_xinclude(FnH))
end, FilesAndHosts),
print(Fd, make_piefxis_server_tail()),
print(Fd, make_piefxis_xml_tail()),
file:close(Fd),
lists:foldl(
fun({FnH, Host}, ok) ->
export_host(Dir, FnH, Host);
(_, Err) ->
Err
end, ok, FilesAndHosts);
{error, Reason} ->
ErrTxt = file:format_error(Reason),
?ERROR_MSG("Failed to open file '~s': ~s", [DFn, ErrTxt]),
{error, Reason}
end.
%% @spec User = String with the user name
%% Domain = String with a domain name
%% El = Sub XML element with offline messages values
%% @ret ok | {error, not_found}
%% @doc Read off-line message from the XML and send it to the server
export_host(Dir, FnH, Host) ->
DFn = make_host_basefilename(Dir, FnH),
case file:open(DFn, [raw, write]) of
{ok, Fd} ->
print(Fd, make_piefxis_xml_head()),
print(Fd, make_piefxis_host_head(Host)),
Users = ejabberd_auth:get_vh_registered_users(Host),
case export_users(Users, Host, Fd) of
ok ->
print(Fd, make_piefxis_host_tail()),
print(Fd, make_piefxis_xml_tail()),
file:close(Fd),
ok;
Err ->
file:close(Fd),
file:delete(DFn),
Err
end;
{error, Reason} ->
ErrTxt = file:format_error(Reason),
?ERROR_MSG("Failed to open file '~s': ~s", [DFn, ErrTxt]),
{error, Reason}
end.
%% @spec User = String with the user name
%% Domain = String with a domain name
%% El = Sub XML element with private storage values
%% @ret ok | {error, not_found}
%% @doc Private storage parsing
export_users([{User, _S}|Users], Server, Fd) ->
case export_user(User, Server, Fd) of
ok ->
export_users(Users, Server, Fd);
Err ->
Err
end;
export_users([], _Server, _Fd) ->
ok.
%%%==================================
%%%% Utilities
export_user(User, Server, Fd) ->
Password = ejabberd_auth:get_password_s(User, Server),
LServer = jlib:nameprep(Server),
PasswordFormat = ejabberd_config:get_option({auth_password_format, LServer}, fun(X) -> X end, plain),
Pass = case Password of
{_,_,_,_} ->
case PasswordFormat of
scram -> format_scram_password(Password);
_ -> <<"">>
end;
_ -> Password
end,
Els = get_offline(User, Server) ++
get_vcard(User, Server) ++
get_privacy(User, Server) ++
get_roster(User, Server) ++
get_private(User, Server),
print(Fd, xml:element_to_binary(
#xmlel{name = <<"user">>,
attrs = [{<<"name">>, User},
{<<"password">>, Pass}],
children = Els})).
format_scram_password({StoredKey, ServerKey, Salt, IterationCount}) ->
StoredKeyB64 = base64:encode(StoredKey),
ServerKeyB64 = base64:encode(ServerKey),
SaltB64 = base64:encode(Salt),
IterationCountBin = list_to_binary(integer_to_list(IterationCount)),
<<"scram:", StoredKeyB64/binary, ",", ServerKeyB64/binary, ",", SaltB64/binary, ",", IterationCountBin/binary>>.
parse_scram_password(PassData) ->
Split = binary:split(PassData, <<",">>, [global]),
[StoredKeyB64, ServerKeyB64, SaltB64, IterationCountBin] = Split,
#scram{
storedkey = StoredKeyB64,
serverkey = ServerKeyB64,
salt = SaltB64,
iterationcount = list_to_integer(binary_to_list(IterationCountBin))
}.
get_vcard(User, Server) ->
JID = jlib:make_jid(User, Server, <<>>),
case mod_vcard:process_sm_iq(JID, JID, #iq{type = get}) of
#iq{type = result, sub_el = [_|_] = VCardEls} ->
VCardEls;
_ ->
[]
end.
%%%==================================
get_offline(User, Server) ->
case mod_offline:get_offline_els(User, Server) of
[] ->
[];
Els ->
NewEls = lists:map(
fun(#xmlel{attrs = Attrs} = El) ->
NewAttrs = lists:keystore(<<"xmlns">>, 1,
Attrs,
{<<"xmlns">>,
<<"jabber:client">>}),
El#xmlel{attrs = NewAttrs}
end, Els),
[#xmlel{name = <<"offline-messages">>, children = NewEls}]
end.
%%%% Export hosts
get_privacy(User, Server) ->
case mod_privacy:get_user_lists(User, Server) of
{ok, #privacy{default = Default,
lists = [_|_] = Lists}} ->
XLists = lists:map(
fun({Name, Items}) ->
XItems = lists:map(
fun mod_privacy:item_to_xml/1, Items),
#xmlel{name = <<"list">>,
attrs = [{<<"name">>, Name}],
children = XItems}
end, Lists),
DefaultEl = case Default of
none ->
[];
_ ->
[#xmlel{name = <<"default">>,
attrs = [{<<"name">>, Default}]}]
end,
[#xmlel{name = <<"query">>,
attrs = [{<<"xmlns">>, ?NS_PRIVACY}],
children = DefaultEl ++ XLists}];
_ ->
[]
end.
%% @spec (Dir::string(), Hosts::[string()]) -> ok
get_roster(User, Server) ->
JID = jlib:make_jid(User, Server, <<>>),
case mod_roster:get_roster(User, Server) of
[_|_] = Items ->
Subs =
lists:flatmap(
fun(#roster{ask = Ask,
askmessage = Msg} = R)
when Ask == in; Ask == both ->
Status = if is_binary(Msg) -> (Msg);
true -> <<"">>
end,
[#xmlel{name = <<"presence">>,
attrs =
[{<<"from">>,
jlib:jid_to_string(R#roster.jid)},
{<<"to">>, jlib:jid_to_string(JID)},
{<<"xmlns">>, <<"jabber:client">>},
{<<"type">>, <<"subscribe">>}],
children =
[#xmlel{name = <<"status">>,
attrs = [],
children =
[{xmlcdata, Status}]}]}];
(_) ->
[]
end, Items),
Rs = lists:flatmap(
fun(#roster{ask = in, subscription = none}) ->
[];
(R) ->
[mod_roster:item_to_xml(R)]
end, Items),
[#xmlel{name = <<"query">>,
attrs = [{<<"xmlns">>, ?NS_ROSTER}],
children = Rs} | Subs];
_ ->
[]
end.
get_private(User, Server) ->
case mod_private:get_data(User, Server) of
[_|_] = Els ->
[#xmlel{name = <<"query">>,
attrs = [{<<"xmlns">>, ?NS_PRIVATE}],
children = Els}];
_ ->
[]
end.
process(#state{xml_stream_state = XMLStreamState, fd = Fd} = State) ->
case file:read(Fd, ?CHUNK_SIZE) of
{ok, Data} ->
NewXMLStreamState = xml_stream:parse(XMLStreamState, Data),
case process_els(State#state{xml_stream_state =
NewXMLStreamState}) of
{ok, NewState} ->
process(NewState);
Err ->
xml_stream:close(NewXMLStreamState),
Err
end;
eof ->
xml_stream:close(XMLStreamState),
ok
end.
process_els(State) ->
receive
{'$gen_event', El} ->
case process_el(El, State) of
{ok, NewState} ->
process_els(NewState);
Err ->
Err
end
after 0 ->
{ok, State}
end.
process_el({xmlstreamstart, <<"server-data">>, Attrs}, State) ->
case xml:get_attr_s(<<"xmlns">>, Attrs) of
?NS_PIEFXIS ->
{ok, State};
?NS_PIE ->
{ok, State};
NS ->
stop("Unknown 'server-data' namespace = ~s", [NS])
end;
process_el({xmlstreamend, _}, State) ->
{ok, State};
process_el({xmlstreamcdata, _}, State) ->
{ok, State};
process_el({xmlstreamelement, #xmlel{name = <<"xi:include">>,
attrs = Attrs}},
#state{dir = Dir, user = <<"">>} = State) ->
FileName = xml:get_attr_s(<<"href">>, Attrs),
case import_file(filename:join([Dir, FileName]), State) of
ok ->
{ok, State};
Err ->
Err
end;
process_el({xmlstreamstart, <<"host">>, Attrs}, State) ->
process_el({xmlstreamelement, #xmlel{name = <<"host">>,
attrs = Attrs}}, State);
process_el({xmlstreamelement, #xmlel{name = <<"host">>,
attrs = Attrs,
children = Els}}, State) ->
JIDS = xml:get_attr_s(<<"jid">>, Attrs),
case jlib:string_to_jid(JIDS) of
#jid{lserver = S} ->
case lists:member(S, ?MYHOSTS) of
true ->
process_users(Els, State#state{server = S});
false ->
stop("Unknown host: ~s", [S])
end;
error ->
stop("Invalid 'jid': ~s", [JIDS])
end;
process_el({xmlstreamstart, <<"user">>, Attrs}, State = #state{server = S})
when S /= <<"">> ->
process_el({xmlstreamelement, #xmlel{name = <<"user">>, attrs = Attrs}},
State);
process_el({xmlstreamelement, #xmlel{name = <<"user">>} = El},
State = #state{server = S}) when S /= <<"">> ->
process_user(El, State);
process_el({xmlstreamelement, El}, State = #state{server = S, user = U})
when S /= <<"">>, U /= <<"">> ->
process_user_el(El, State);
process_el({xmlstreamelement, El}, _State) ->
stop("Unexpected tag: ~p", [El]);
process_el({xmlstreamstart, El, Attrs}, _State) ->
stop("Unexpected payload: ~p", [{El, Attrs}]);
process_el({xmlstreamerror, Err}, _State) ->
stop("Failed to process element = ~p", [Err]).
process_users([#xmlel{} = El|Els], State) ->
case process_user(El, State) of
{ok, NewState} ->
process_users(Els, NewState);
Err ->
Err
end;
process_users([_|Els], State) ->
process_users(Els, State);
process_users([], State) ->
{ok, State}.
process_user(#xmlel{name = <<"user">>, attrs = Attrs, children = Els},
#state{server = LServer} = State) ->
Name = xml:get_attr_s(<<"name">>, Attrs),
Password = xml:get_attr_s(<<"password">>, Attrs),
PasswordFormat = ejabberd_config:get_option({auth_password_format, LServer}, fun(X) -> X end, plain),
Pass = case PasswordFormat of
scram ->
case Password of
<<"scram:", PassData/binary>> ->
parse_scram_password(PassData);
P -> P
end;
_ -> Password
end,
case jlib:nodeprep(Name) of
error ->
stop("Invalid 'user': ~s", [Name]);
LUser ->
case ejabberd_auth:try_register(LUser, LServer, Pass) of
{atomic, _} ->
process_user_els(Els, State#state{user = LUser});
Err ->
stop("Failed to create user '~s': ~p", [Name, Err])
end
end.
process_user_els([#xmlel{} = El|Els], State) ->
case process_user_el(El, State) of
{ok, NewState} ->
process_user_els(Els, NewState);
Err ->
Err
end;
process_user_els([_|Els], State) ->
process_user_els(Els, State);
process_user_els([], State) ->
{ok, State}.
process_user_el(#xmlel{name = Name, attrs = Attrs, children = Els} = El,
State) ->
case {Name, xml:get_attr_s(<<"xmlns">>, Attrs)} of
{<<"query">>, ?NS_ROSTER} ->
process_roster(El, State);
{<<"query">>, ?NS_PRIVACY} ->
%% Make sure <list/> elements go before <active/> and <default/>
NewEls = lists:reverse(lists:keysort(#xmlel.name, Els)),
process_privacy_el(El#xmlel{children = NewEls}, State);
{<<"query">>, ?NS_PRIVATE} ->
process_private(El, State);
{<<"vCard">>, ?NS_VCARD} ->
process_vcard(El, State);
{<<"offline-messages">>, _} ->
process_offline_msgs(Els, State);
{<<"presence">>, <<"jabber:client">>} ->
process_presence(El, State);
_ ->
{ok, State}
end.
process_privacy_el(#xmlel{children = [#xmlel{} = SubEl|SubEls]} = El, State) ->
case process_privacy(#xmlel{children = [SubEl]}, State) of
{ok, NewState} ->
process_privacy_el(El#xmlel{children = SubEls}, NewState);
Err ->
Err
end;
process_privacy_el(#xmlel{children = [_|SubEls]} = El, State) ->
process_privacy_el(El#xmlel{children = SubEls}, State);
process_privacy_el(#xmlel{children = []}, State) ->
{ok, State}.
process_offline_msgs([#xmlel{} = El|Els], State) ->
case process_offline_msg(El, State) of
{ok, NewState} ->
process_offline_msgs(Els, NewState);
Err ->
Err
end;
process_offline_msgs([_|Els], State) ->
process_offline_msgs(Els, State);
process_offline_msgs([], State) ->
{ok, State}.
process_roster(El, State = #state{user = U, server = S}) ->
case mod_roster:set_items(U, S, El) of
{atomic, _} ->
{ok, State};
Err ->
stop("Failed to write roster: ~p", [Err])
end.
%%%==================================
%%%% Export server
process_privacy(El, State = #state{user = U, server = S}) ->
JID = jlib:make_jid(U, S, <<"">>),
case mod_privacy:process_iq_set(
[], JID, JID, #iq{type = set, sub_el = El}) of
{error, Error} = Err ->
#xmlel{children = Els} = El,
Name = case xml:remove_cdata(Els) of
[#xmlel{name = N}] -> N;
_ -> undefined
end,
#xmlel{attrs = Attrs} = Error,
ErrorCode = case lists:keysearch(<<"code">>, 1, Attrs) of
{value, {_, V}} -> V;
false -> undefined
end,
if
ErrorCode == <<"404">>, Name == <<"default">> ->
{ok, State};
true ->
stop("Failed to write privacy: ~p", [Err])
end;
_ ->
{ok, State}
end.
%% @spec (Dir::string()) -> ok
process_private(El, State = #state{user = U, server = S}) ->
JID = jlib:make_jid(U, S, <<"">>),
case mod_private:process_sm_iq(
JID, JID, #iq{type = set, sub_el = El}) of
#iq{type = result} ->
{ok, State};
Err ->
stop("Failed to write private: ~p", [Err])
end.
%%%==================================
%%%% Export host
process_vcard(El, State = #state{user = U, server = S}) ->
JID = jlib:make_jid(U, S, <<"">>),
case mod_vcard:process_sm_iq(
JID, JID, #iq{type = set, sub_el = El}) of
#iq{type = result} ->
{ok, State};
Err ->
stop("Failed to write vcard: ~p", [Err])
end.
%% @spec (Dir::string(), Host::string()) -> ok
process_offline_msg(El, State = #state{user = U, server = S}) ->
FromS = xml:get_attr_s(<<"from">>, El#xmlel.attrs),
case jlib:string_to_jid(FromS) of
#jid{} = From ->
To = jlib:make_jid(U, S, <<>>),
NewEl = jlib:replace_from_to(From, To, El),
case catch mod_offline:store_packet(From, To, NewEl) of
{'EXIT', _} = Err ->
stop("Failed to store offline message: ~p", [Err]);
_ ->
{ok, State}
end;
_ ->
stop("Invalid 'from' = ~s", [FromS])
end.
%% @spec (Dir::string(), Fn::string(), Host::string()) -> ok
process_presence(El, #state{user = U, server = S} = State) ->
FromS = xml:get_attr_s(<<"from">>, El#xmlel.attrs),
case jlib:string_to_jid(FromS) of
#jid{} = From ->
To = jlib:make_jid(U, S, <<>>),
NewEl = jlib:replace_from_to(From, To, El),
ejabberd_router:route(From, To, NewEl),
{ok, State};
_ ->
stop("Invalid 'from' = ~s", [FromS])
end.
stop(Fmt, Args) ->
?ERROR_MSG(Fmt, Args),
{error, import_failed}.
make_filename_template() ->
{{Year, Month, Day}, {Hour, Minute, Second}} = calendar:local_time(),
list_to_binary(
io_lib:format("~4..0w~2..0w~2..0w-~2..0w~2..0w~2..0w",
[Year, Month, Day, Hour, Minute, Second])).
make_main_basefilename(Dir, FnT) ->
Filename2 = <<FnT/binary, ".xml">>,
filename:join([Dir, Filename2]).
%% @doc Make the filename for the host.
%% Example: ``(<<"20080804-231550">>, <<"jabber.example.org">>) ->
%% <<"20080804-231550_jabber_example_org.xml">>''
make_host_filename(FnT, Host) ->
Host2 = str:join(str:tokens(Host, <<".">>), <<"_">>),
<<FnT/binary, "_", Host2/binary, ".xml">>.
%%%==================================
%%%% PIEFXIS formatting
make_host_basefilename(Dir, FnT) ->
filename:join([Dir, FnT]).
%% @spec () -> string()
make_piefxis_xml_head() ->
"<?xml version='1.0' encoding='UTF-8'?>".
%% @spec () -> string()
make_piefxis_xml_tail() ->
"".
%% @spec () -> string()
make_piefxis_server_head() ->
io_lib:format("<server-data xmlns='~s' xmlns:xi='~s'>",
[?NS_PIE, ?NS_XI]).
%% @spec () -> string()
make_piefxis_server_tail() ->
"</server-data>".
%% @spec (Host::string()) -> string()
make_piefxis_host_head(Host) ->
io_lib:format("<host xmlns='~s' xmlns:xi='~s' jid='~s'>",
[?NS_PIE, ?NS_XI, Host]).
%% @spec () -> string()
make_piefxis_host_tail() ->
"</host>".
%% @spec (Fn::string()) -> string()
make_xinclude(Fn) ->
Base = filename:basename(Fn),
io_lib:format("<xi:include href='~s'/>", [Base]).
%%%==================================
%%%% Export user
%% @spec (Fd, Username::string(), Host::string()) -> ok
%% @doc Extract user information and print it.
%% @spec (Username::string(), Host::string()) -> string()
%% @spec (InfoName::atom(), Username::string(), Host::string()) -> string()
%%%==================================
%%%% Interface with ejabberd offline storage
%% Copied from mod_offline.erl and customized
%%%==================================
%%%% Interface with ejabberd private storage
%%%==================================
%%%% Disk file access
%% @spec () -> string()
%% @spec (Dir::string(), FnT::string()) -> string()
%% @spec (FnT::string(), Host::string()) -> FnH::string()
%% @doc Make the filename for the host.
%% Example: ``("20080804-231550", "jabber.example.org") -> "20080804-231550_jabber_example_org.xml"''
%% @spec (Fn::string()) -> {ok, Fd}
%% @spec (Fd) -> ok
%% @spec (Fd, String::string()) -> ok
print(Fd, String) ->
%%%==================================
%%% vim: set filetype=erlang tabstop=8 foldmarker=%%%%,%%%= foldmethod=marker:
file:write(Fd, String).
opt_type(auth_password_format) -> fun (X) -> X end;
opt_type(_) -> [auth_password_format].
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