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xmpp.chapril.org-ejabberd/src/ejabberd_ctl.erl
Evgeny Khramtsov 2d246f61dd Fix some dialyzer warnings
2018-09-09 09:59:08 +03:00

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%%%----------------------------------------------------------------------
%%% File : ejabberd_ctl.erl
%%% Author : Alexey Shchepin <alexey@process-one.net>
%%% Purpose : ejabberd command line admin tool
%%% Created : 11 Jan 2004 by Alexey Shchepin <alexey@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2018 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.
%%%
%%%----------------------------------------------------------------------
%%% @headerfile "ejabberd_ctl.hrl"
%%% @doc Management of ejabberdctl commands and frontend to ejabberd commands.
%%%
%%% An ejabberdctl command is an abstract function identified by a
%%% name, with a defined number of calling arguments, that can be
%%% defined in any Erlang module and executed using ejabberdctl
%%% administration script.
%%%
%%% Note: strings cannot have blankspaces
%%%
%%% Does not support commands that have arguments with ctypes: list, tuple
%%%
%%% TODO: Update the guide
%%% TODO: Mention this in the release notes
%%% Note: the commands with several words use now the underline: _
%%% It is still possible to call the commands with dash: -
%%% but this is deprecated, and may be removed in a future version.
-module(ejabberd_ctl).
-behaviour(ejabberd_config).
-behaviour(gen_server).
-author('alexey@process-one.net').
-export([start/0, start_link/0, process/1, process2/2,
register_commands/3, unregister_commands/3,
opt_type/1]).
%% gen_server callbacks
-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
terminate/2, code_change/3]).
-include("ejabberd_ctl.hrl").
-include("ejabberd_commands.hrl").
-include("logger.hrl").
-define(DEFAULT_VERSION, 1000000).
-record(state, {}).
%%-----------------------------
%% Module
%%-----------------------------
start() ->
[SNode, Timeout, Args] = case init:get_plain_arguments() of
[SNode2, "--no-timeout" | Args2] ->
[SNode2, infinity, Args2];
[SNode3 | Args3] ->
[SNode3, 60000, Args3];
_ ->
print_usage(?DEFAULT_VERSION),
halt(?STATUS_USAGE)
end,
SNode1 = case string:tokens(SNode, "@") of
[_Node, _Server] ->
SNode;
_ ->
case net_kernel:longnames() of
true ->
lists:flatten([SNode, "@", inet_db:gethostname(),
".", inet_db:res_option(domain)]);
false ->
lists:flatten([SNode, "@", inet_db:gethostname()]);
_ ->
SNode
end
end,
Node = list_to_atom(SNode1),
Status = case rpc:call(Node, ?MODULE, process, [Args], Timeout) of
{badrpc, Reason} ->
print("Failed RPC connection to the node ~p: ~p~n",
[Node, Reason]),
%% TODO: show minimal start help
?STATUS_BADRPC;
{invalid_version, V} ->
print("Invalid API version number: ~p~n", [V]),
?STATUS_ERROR;
S ->
S
end,
halt(Status).
start_link() ->
gen_server:start_link({local, ?MODULE}, ?MODULE, [], []).
init([]) ->
ets:new(ejabberd_ctl_cmds, [named_table, set, public]),
ets:new(ejabberd_ctl_host_cmds, [named_table, set, public]),
{ok, #state{}}.
handle_call(_Request, _From, State) ->
Reply = ok,
{reply, Reply, State}.
handle_cast(_Msg, State) ->
{noreply, State}.
handle_info(_Info, State) ->
{noreply, State}.
terminate(_Reason, _State) ->
ok.
code_change(_OldVsn, State, _Extra) ->
{ok, State}.
%%-----------------------------
%% ejabberdctl Command management
%%-----------------------------
register_commands(CmdDescs, Module, Function) ->
ets:insert(ejabberd_ctl_cmds, CmdDescs),
ejabberd_hooks:add(ejabberd_ctl_process,
Module, Function, 50),
ok.
unregister_commands(CmdDescs, Module, Function) ->
lists:foreach(fun(CmdDesc) ->
ets:delete_object(ejabberd_ctl_cmds, CmdDesc)
end, CmdDescs),
ejabberd_hooks:delete(ejabberd_ctl_process,
Module, Function, 50),
ok.
%%-----------------------------
%% Process
%%-----------------------------
-spec process([string()]) -> non_neg_integer().
process(Args) ->
process(Args, ?DEFAULT_VERSION).
-spec process([string()], non_neg_integer()) -> non_neg_integer().
%% The commands status, stop and restart are defined here to ensure
%% they are usable even if ejabberd is completely stopped.
process(["status"], _Version) ->
{InternalStatus, ProvidedStatus} = init:get_status(),
print("The node ~p is ~p with status: ~p~n",
[node(), InternalStatus, ProvidedStatus]),
case lists:keymember(ejabberd, 1, application:which_applications()) of
false ->
EjabberdLogPath = ejabberd_logger:get_log_path(),
print("ejabberd is not running in that node~n"
"Check for error messages: ~s~n"
"or other files in that directory.~n", [EjabberdLogPath]),
?STATUS_ERROR;
true ->
print("ejabberd ~s is running in that node~n", [ejabberd_config:get_version()]),
?STATUS_SUCCESS
end;
process(["stop"], _Version) ->
%%ejabberd_cover:stop(),
init:stop(),
?STATUS_SUCCESS;
process(["restart"], _Version) ->
init:restart(),
?STATUS_SUCCESS;
process(["mnesia"], _Version) ->
print("~p~n", [mnesia:system_info(all)]),
?STATUS_SUCCESS;
process(["mnesia", "info"], _Version) ->
mnesia:info(),
?STATUS_SUCCESS;
process(["mnesia", Arg], _Version) ->
case catch mnesia:system_info(list_to_atom(Arg)) of
{'EXIT', Error} -> print("Error: ~p~n", [Error]);
Return -> print("~p~n", [Return])
end,
?STATUS_SUCCESS;
%% The arguments --long and --dual are not documented because they are
%% automatically selected depending in the number of columns of the shell
process(["help" | Mode], Version) ->
{MaxC, ShCode} = get_shell_info(),
case Mode of
[] ->
print_usage(dual, MaxC, ShCode, Version),
?STATUS_USAGE;
["--dual"] ->
print_usage(dual, MaxC, ShCode, Version),
?STATUS_USAGE;
["--long"] ->
print_usage(long, MaxC, ShCode, Version),
?STATUS_USAGE;
["--tags"] ->
print_usage_tags(MaxC, ShCode, Version),
?STATUS_SUCCESS;
["--tags", Tag] ->
print_usage_tags(Tag, MaxC, ShCode, Version),
?STATUS_SUCCESS;
["help"] ->
print_usage_help(MaxC, ShCode),
?STATUS_SUCCESS;
[CmdString | _] ->
CmdStringU = ejabberd_regexp:greplace(
list_to_binary(CmdString), <<"-">>, <<"_">>),
print_usage_commands2(binary_to_list(CmdStringU), MaxC, ShCode, Version),
?STATUS_SUCCESS
end;
process(["--version", Arg | Args], _) ->
Version =
try
list_to_integer(Arg)
catch _:_ ->
throw({invalid_version, Arg})
end,
process(Args, Version);
process(Args, Version) ->
AccessCommands = get_accesscommands(),
{String, Code} = process2(Args, AccessCommands, Version),
case String of
[] -> ok;
_ ->
io:format("~s~n", [String])
end,
Code.
%% @spec (Args::[string()], AccessCommands) -> {String::string(), Code::integer()}
process2(Args, AccessCommands) ->
process2(Args, AccessCommands, ?DEFAULT_VERSION).
%% @spec (Args::[string()], AccessCommands, Version) -> {String::string(), Code::integer()}
process2(["--auth", User, Server, Pass | Args], AccessCommands, Version) ->
process2(Args, AccessCommands, {list_to_binary(User), list_to_binary(Server),
list_to_binary(Pass), true}, Version);
process2(Args, AccessCommands, Version) ->
process2(Args, AccessCommands, noauth, Version).
process2(Args, AccessCommands, Auth, Version) ->
case try_run_ctp(Args, Auth, AccessCommands, Version) of
{String, wrong_command_arguments}
when is_list(String) ->
io:format(lists:flatten(["\n" | String]++["\n"])),
[CommandString | _] = Args,
process(["help" | [CommandString]], Version),
{lists:flatten(String), ?STATUS_ERROR};
{String, Code}
when is_list(String) and is_integer(Code) ->
{lists:flatten(String), Code};
String
when is_list(String) ->
{lists:flatten(String), ?STATUS_SUCCESS};
Code
when is_integer(Code) ->
{"", Code};
Other ->
{"Erroneous result: " ++ io_lib:format("~p", [Other]), ?STATUS_ERROR}
end.
get_accesscommands() ->
ejabberd_config:get_option(ejabberdctl_access_commands, []).
%%-----------------------------
%% Command calling
%%-----------------------------
%% @spec (Args::[string()], Auth, AccessCommands) -> string() | integer() | {string(), integer()}
try_run_ctp(Args, Auth, AccessCommands, Version) ->
try ejabberd_hooks:run_fold(ejabberd_ctl_process, false, [Args]) of
false when Args /= [] ->
try_call_command(Args, Auth, AccessCommands, Version);
false ->
print_usage(Version),
{"", ?STATUS_USAGE};
Status ->
{"", Status}
catch
exit:Why ->
print_usage(Version),
{io_lib:format("Error in ejabberd ctl process: ~p", [Why]), ?STATUS_USAGE};
Error:Why ->
%% In this case probably ejabberd is not started, so let's show Status
process(["status"], Version),
print("~n", []),
{io_lib:format("Error in ejabberd ctl process: '~p' ~p", [Error, Why]), ?STATUS_USAGE}
end.
%% @spec (Args::[string()], Auth, AccessCommands) -> string() | integer() | {string(), integer()}
try_call_command(Args, Auth, AccessCommands, Version) ->
try call_command(Args, Auth, AccessCommands, Version) of
{error, command_unknown} ->
{io_lib:format("Error: command ~p not known.", [hd(Args)]), ?STATUS_ERROR};
{error, wrong_command_arguments} ->
{"Error: wrong arguments", ?STATUS_ERROR};
Res ->
Res
catch
throw:Error ->
{io_lib:format("~p", [Error]), ?STATUS_ERROR};
A:Why ->
Stack = erlang:get_stacktrace(),
{io_lib:format("Problem '~p ~p' occurred executing the command.~nStacktrace: ~p", [A, Why, Stack]), ?STATUS_ERROR}
end.
%% @spec (Args::[string()], Auth, AccessCommands) -> string() | integer() | {string(), integer()} | {error, ErrorType}
call_command([CmdString | Args], Auth, _AccessCommands, Version) ->
CmdStringU = ejabberd_regexp:greplace(
list_to_binary(CmdString), <<"-">>, <<"_">>),
Command = list_to_atom(binary_to_list(CmdStringU)),
case ejabberd_commands:get_command_format(Command, Auth, Version) of
{error, command_unknown} ->
{error, command_unknown};
{ArgsFormat, ResultFormat} ->
case (catch format_args(Args, ArgsFormat)) of
ArgsFormatted when is_list(ArgsFormatted) ->
CI = case Auth of
{U, S, _, _} -> #{usr => {U, S, <<"">>}, caller_host => S};
_ -> #{}
end,
CI2 = CI#{caller_module => ?MODULE},
Result = ejabberd_commands:execute_command2(Command,
ArgsFormatted,
CI2,
Version),
format_result(Result, ResultFormat);
{'EXIT', {function_clause,[{lists,zip,[A1, A2], _} | _]}} ->
{NumCompa, TextCompa} =
case {length(A1), length(A2)} of
{L1, L2} when L1 < L2 -> {L2-L1, "less argument"};
{L1, L2} when L1 > L2 -> {L1-L2, "more argument"}
end,
{io_lib:format("Error: the command ~p requires ~p ~s.",
[CmdString, NumCompa, TextCompa]),
wrong_command_arguments}
end
end.
%%-----------------------------
%% Format arguments
%%-----------------------------
format_args(Args, ArgsFormat) ->
lists:foldl(
fun({{_ArgName, ArgFormat}, Arg}, Res) ->
Formatted = format_arg(Arg, ArgFormat),
Res ++ [Formatted]
end,
[],
lists:zip(ArgsFormat, Args)).
format_arg(Arg, integer) ->
format_arg2(Arg, "~d");
format_arg(Arg, binary) ->
unicode:characters_to_binary(Arg, utf8);
format_arg("", string) ->
"";
format_arg(Arg, string) ->
NumChars = integer_to_list(length(Arg)),
Parse = "~" ++ NumChars ++ "c",
format_arg2(Arg, Parse).
format_arg2(Arg, Parse)->
{ok, [Arg2], _RemainingArguments} = io_lib:fread(Parse, Arg),
Arg2.
%%-----------------------------
%% Format result
%%-----------------------------
format_result({error, ErrorAtom}, _) ->
{io_lib:format("Error: ~p", [ErrorAtom]), make_status(error)};
%% An error should always be allowed to return extended error to help with API.
%% Extended error is of the form:
%% {error, type :: atom(), code :: int(), Desc :: string()}
format_result({error, ErrorAtom, Code, _Msg}, _) ->
{io_lib:format("Error: ~p", [ErrorAtom]), make_status(Code)};
format_result(Atom, {_Name, atom}) ->
io_lib:format("~p", [Atom]);
format_result(Int, {_Name, integer}) ->
io_lib:format("~p", [Int]);
format_result([A|_]=String, {_Name, string}) when is_list(String) and is_integer(A) ->
io_lib:format("~s", [String]);
format_result(Binary, {_Name, string}) when is_binary(Binary) ->
io_lib:format("~s", [binary_to_list(Binary)]);
format_result(Atom, {_Name, string}) when is_atom(Atom) ->
io_lib:format("~s", [atom_to_list(Atom)]);
format_result(Integer, {_Name, string}) when is_integer(Integer) ->
io_lib:format("~s", [integer_to_list(Integer)]);
format_result(Other, {_Name, string}) ->
io_lib:format("~p", [Other]);
format_result(Code, {_Name, rescode}) ->
make_status(Code);
format_result({Code, Text}, {_Name, restuple}) ->
{io_lib:format("~s", [Text]), make_status(Code)};
%% The result is a list of something: [something()]
format_result([], {_Name, {list, _ElementsDef}}) ->
"";
format_result([FirstElement | Elements], {_Name, {list, ElementsDef}}) ->
%% Start formatting the first element
[format_result(FirstElement, ElementsDef) |
%% If there are more elements, put always first a newline character
lists:map(
fun(Element) ->
["\n" | format_result(Element, ElementsDef)]
end,
Elements)];
%% The result is a tuple with several elements: {something1(), something2(),...}
%% NOTE: the elements in the tuple are separated with tabular characters,
%% if a string is empty, it will be difficult to notice in the shell,
%% maybe a different separation character should be used, like ;;?
format_result(ElementsTuple, {_Name, {tuple, ElementsDef}}) ->
ElementsList = tuple_to_list(ElementsTuple),
[{FirstE, FirstD} | ElementsAndDef] = lists:zip(ElementsList, ElementsDef),
[format_result(FirstE, FirstD) |
lists:map(
fun({Element, ElementDef}) ->
["\t" | format_result(Element, ElementDef)]
end,
ElementsAndDef)];
format_result(404, {_Name, _}) ->
make_status(not_found).
make_status(ok) -> ?STATUS_SUCCESS;
make_status(true) -> ?STATUS_SUCCESS;
make_status(Code) when is_integer(Code), Code > 255 -> ?STATUS_ERROR;
make_status(Code) when is_integer(Code), Code > 0 -> Code;
make_status(_Error) -> ?STATUS_ERROR.
get_list_commands(Version) ->
try ejabberd_commands:list_commands(Version) of
Commands ->
[tuple_command_help(Command)
|| {N,_,_}=Command <- Commands,
%% Don't show again those commands, because they are already
%% announced by ejabberd_ctl itself
N /= status, N /= stop, N /= restart]
catch
exit:_ ->
[]
end.
%% Return: {string(), [string()], string()}
tuple_command_help({Name, _Args, Desc}) ->
{Args, _} = ejabberd_commands:get_command_format(Name, admin),
Arguments = [atom_to_list(ArgN) || {ArgN, _ArgF} <- Args],
Prepend = case is_supported_args(Args) of
true -> "";
false -> "*"
end,
CallString = atom_to_list(Name),
{CallString, Arguments, Prepend ++ Desc}.
is_supported_args(Args) ->
lists:all(
fun({_Name, Format}) ->
(Format == integer)
or (Format == string)
or (Format == binary)
end,
Args).
get_list_ctls() ->
case catch ets:tab2list(ejabberd_ctl_cmds) of
{'EXIT', _} -> [];
Cs -> [{NameArgs, [], Desc} || {NameArgs, Desc} <- Cs]
end.
%%-----------------------------
%% Print help
%%-----------------------------
%% Bold
-define(B1, "\e[1m").
-define(B2, "\e[22m").
-define(B(S), case ShCode of true -> [?B1, S, ?B2]; false -> S end).
%% Underline
-define(U1, "\e[4m").
-define(U2, "\e[24m").
-define(U(S), case ShCode of true -> [?U1, S, ?U2]; false -> S end).
print_usage(Version) ->
{MaxC, ShCode} = get_shell_info(),
print_usage(dual, MaxC, ShCode, Version).
print_usage(HelpMode, MaxC, ShCode, Version) ->
AllCommands =
[
{"status", [], "Get ejabberd status"},
{"stop", [], "Stop ejabberd"},
{"restart", [], "Restart ejabberd"},
{"help", ["[--tags [tag] | com?*]"], "Show help (try: ejabberdctl help help)"},
{"mnesia", ["[info]"], "show information of Mnesia system"}] ++
get_list_commands(Version) ++
get_list_ctls(),
print(
["Usage: ", ?B("ejabberdctl"), " [--no-timeout] [--node ", ?U("nodename"), "] [--version ", ?U("api_version"), "] ",
?U("command"), " [", ?U("options"), "]\n"
"\n"
"Available commands in this ejabberd node:\n"], []),
print_usage_commands(HelpMode, MaxC, ShCode, AllCommands),
print(
["\n"
"Examples:\n"
" ejabberdctl restart\n"
" ejabberdctl --node ejabberd@host restart\n"],
[]).
print_usage_commands(HelpMode, MaxC, ShCode, Commands) ->
CmdDescsSorted = lists:keysort(1, Commands),
%% What is the length of the largest command?
{CmdArgsLenDescsSorted, Lens} =
lists:mapfoldl(
fun({Cmd, Args, Desc}, Lengths) ->
Len =
length(Cmd) +
lists:foldl(fun(Arg, R) ->
R + 1 + length(Arg)
end,
0,
Args),
{{Cmd, Args, Len, Desc}, [Len | Lengths]}
end,
[],
CmdDescsSorted),
MaxCmdLen = case Lens of
[] -> 80;
_ -> lists:max(Lens)
end,
%% For each command in the list of commands
%% Convert its definition to a line
FmtCmdDescs = format_command_lines(CmdArgsLenDescsSorted, MaxCmdLen, MaxC, ShCode, HelpMode),
print([FmtCmdDescs], []).
%% Get some info about the shell:
%% how many columns of width
%% and guess if it supports text formatting codes.
get_shell_info() ->
%% This function was introduced in OTP R12B-0
try io:columns() of
{ok, C} -> {C-2, true};
{error, enotsup} -> {78, false}
catch
_:_ -> {78, false}
end.
%% Split this command description in several lines of proper length
prepare_description(DescInit, MaxC, Desc) ->
Words = string:tokens(Desc, " "),
prepare_long_line(DescInit, MaxC, Words).
prepare_long_line(DescInit, MaxC, Words) ->
MaxSegmentLen = MaxC - DescInit,
MarginString = lists:duplicate(DescInit, $\s), % Put spaces
[FirstSegment | MoreSegments] = split_desc_segments(MaxSegmentLen, Words),
MoreSegmentsMixed = mix_desc_segments(MarginString, MoreSegments),
[FirstSegment | MoreSegmentsMixed].
mix_desc_segments(MarginString, Segments) ->
[["\n", MarginString, Segment] || Segment <- Segments].
split_desc_segments(MaxL, Words) ->
join(MaxL, Words).
%% Join words in a segment,
%% but stop adding to a segment if adding this word would pass L
join(L, Words) ->
join(L, Words, 0, [], []).
join(_Len, [], _CurSegLen, CurSeg, AllSegs) ->
lists:reverse([CurSeg | AllSegs]);
join(Len, [Word | Tail], CurSegLen, CurSeg, AllSegs) ->
WordLen = length(Word),
SegSize = WordLen + CurSegLen + 1,
{NewCurSeg, NewAllSegs, NewCurSegLen} =
if SegSize < Len ->
{[CurSeg, " ", Word], AllSegs, SegSize};
true ->
{Word, [CurSeg | AllSegs], WordLen}
end,
NewLen = case string:str(Word, "\n") of
0 ->
NewCurSegLen;
_ ->
0
end,
join(Len, Tail, NewLen, NewCurSeg, NewAllSegs).
format_command_lines(CALD, MaxCmdLen, MaxC, ShCode, dual)
when MaxC - MaxCmdLen < 40 ->
%% If the space available for descriptions is too narrow, enforce long help mode
format_command_lines(CALD, MaxCmdLen, MaxC, ShCode, long);
format_command_lines(CALD, MaxCmdLen, MaxC, ShCode, dual) ->
lists:map(
fun({Cmd, Args, CmdArgsL, Desc}) ->
DescFmt = prepare_description(MaxCmdLen+4, MaxC, Desc),
[" ", ?B(Cmd), " ", [[?U(Arg), " "] || Arg <- Args],
string:chars($\s, MaxCmdLen - CmdArgsL + 1),
DescFmt, "\n"]
end, CALD);
format_command_lines(CALD, _MaxCmdLen, MaxC, ShCode, long) ->
lists:map(
fun({Cmd, Args, _CmdArgsL, Desc}) ->
DescFmt = prepare_description(8, MaxC, Desc),
["\n ", ?B(Cmd), " ", [[?U(Arg), " "] || Arg <- Args], "\n", " ",
DescFmt, "\n"]
end, CALD).
%%-----------------------------
%% Print Tags
%%-----------------------------
print_usage_tags(MaxC, ShCode, Version) ->
print("Available tags and commands:", []),
TagsCommands = ejabberd_commands:get_tags_commands(Version),
lists:foreach(
fun({Tag, Commands} = _TagCommands) ->
print(["\n\n ", ?B(Tag), "\n "], []),
Words = lists:sort(Commands),
Desc = prepare_long_line(5, MaxC, Words),
print(Desc, [])
end,
TagsCommands),
print("\n\n", []).
print_usage_tags(Tag, MaxC, ShCode, Version) ->
print(["Available commands with tag ", ?B(Tag), ":", "\n"], []),
HelpMode = long,
TagsCommands = ejabberd_commands:get_tags_commands(Version),
CommandsNames = case lists:keysearch(Tag, 1, TagsCommands) of
{value, {Tag, CNs}} -> CNs;
false -> []
end,
CommandsList = lists:map(
fun(NameString) ->
C = ejabberd_commands:get_command_definition(
list_to_atom(NameString), Version),
#ejabberd_commands{name = Name,
args = Args,
desc = Desc} = C,
tuple_command_help({Name, Args, Desc})
end,
CommandsNames),
print_usage_commands(HelpMode, MaxC, ShCode, CommandsList),
print("\n", []).
%%-----------------------------
%% Print usage of 'help' command
%%-----------------------------
print_usage_help(MaxC, ShCode) ->
LongDesc =
["The special 'help' ejabberdctl command provides help of ejabberd commands.\n\n"
"The format is:\n ", ?B("ejabberdctl"), " ", ?B("help"), " [", ?B("--tags"), " ", ?U("[tag]"), " | ", ?U("com?*"), "]\n\n"
"The optional arguments:\n"
" ",?B("--tags")," Show all tags and the names of commands in each tag\n"
" ",?B("--tags"), " ", ?U("tag")," Show description of commands in this tag\n"
" ",?U("command")," Show detailed description of the command\n"
" ",?U("com?*")," Show detailed description of commands that match this glob.\n"
" You can use ? to match a simple character,\n"
" and * to match several characters.\n"
"\n",
"Some example usages:\n",
" ejabberdctl help\n",
" ejabberdctl help --tags\n",
" ejabberdctl help --tags accounts\n",
" ejabberdctl help register\n",
" ejabberdctl help regist*\n",
"\n",
"Please note that 'ejabberdctl help' shows all ejabberd commands,\n",
"even those that cannot be used in the shell with ejabberdctl.\n",
"Those commands can be identified because the description starts with: *"],
ArgsDef = [],
C = #ejabberd_commands{
desc = "Show help of ejabberd commands",
longdesc = lists:flatten(LongDesc),
args = ArgsDef,
result = {help, string}},
print_usage_command("help", C, MaxC, ShCode).
%%-----------------------------
%% Print usage command
%%-----------------------------
%% @spec (CmdSubString::string(), MaxC::integer(), ShCode::boolean()) -> ok
print_usage_commands2(CmdSubString, MaxC, ShCode, Version) ->
%% Get which command names match this substring
AllCommandsNames = [atom_to_list(Name) || {Name, _, _} <- ejabberd_commands:list_commands(Version)],
Cmds = filter_commands(AllCommandsNames, CmdSubString),
case Cmds of
[] -> io:format("Error: no command found that match: ~p~n", [CmdSubString]);
_ -> print_usage_commands3(lists:sort(Cmds), MaxC, ShCode, Version)
end.
print_usage_commands3(Cmds, MaxC, ShCode, Version) ->
%% Then for each one print it
lists:mapfoldl(
fun(Cmd, Remaining) ->
print_usage_command(Cmd, MaxC, ShCode, Version),
case Remaining > 1 of
true -> print([" ", lists:duplicate(MaxC, 126), " \n"], []);
false -> ok
end,
{ok, Remaining-1}
end,
length(Cmds),
Cmds).
filter_commands(All, SubString) ->
case lists:member(SubString, All) of
true -> [SubString];
false -> filter_commands_regexp(All, SubString)
end.
filter_commands_regexp(All, Glob) ->
RegExp = ejabberd_regexp:sh_to_awk(list_to_binary(Glob)),
lists:filter(
fun(Command) ->
case ejabberd_regexp:run(list_to_binary(Command), RegExp) of
match ->
true;
nomatch ->
false
end
end,
All).
%% @spec (Cmd::string(), MaxC::integer(), ShCode::boolean()) -> ok
print_usage_command(Cmd, MaxC, ShCode, Version) ->
Name = list_to_atom(Cmd),
case ejabberd_commands:get_command_definition(Name, Version) of
command_not_found ->
io:format("Error: command ~p not known.~n", [Cmd]);
C ->
print_usage_command2(Cmd, C, MaxC, ShCode)
end.
print_usage_command2(Cmd, C, MaxC, ShCode) ->
#ejabberd_commands{
tags = TagsAtoms,
desc = Desc,
longdesc = LongDesc,
result = ResultDef} = C,
NameFmt = [" ", ?B("Command Name"), ": ", Cmd, "\n"],
%% Initial indentation of result is 13 = length(" Arguments: ")
{ArgsDef, _} = ejabberd_commands:get_command_format(
C#ejabberd_commands.name, admin),
Args = [format_usage_ctype(ArgDef, 13) || ArgDef <- ArgsDef],
ArgsMargin = lists:duplicate(13, $\s),
ArgsListFmt = case Args of
[] -> "\n";
_ -> [ [Arg, "\n", ArgsMargin] || Arg <- Args]
end,
ArgsFmt = [" ", ?B("Arguments"), ": ", ArgsListFmt],
%% Initial indentation of result is 11 = length(" Returns: ")
ResultFmt = format_usage_ctype(ResultDef, 11),
ReturnsFmt = [" ",?B("Returns"),": ", ResultFmt],
XmlrpcFmt = "", %%+++ [" ",?B("XML-RPC"),": ", format_usage_xmlrpc(ArgsDef, ResultDef), "\n\n"],
TagsFmt = [" ",?B("Tags"),": ", prepare_long_line(8, MaxC, [atom_to_list(TagA) || TagA <- TagsAtoms])],
DescFmt = [" ",?B("Description"),": ", prepare_description(15, MaxC, Desc)],
LongDescFmt = case LongDesc of
"" -> "";
_ -> ["", prepare_description(0, MaxC, LongDesc), "\n\n"]
end,
NoteEjabberdctl = case is_supported_args(ArgsDef) of
true -> "";
false -> [" ", ?B("Note:"), " This command cannot be executed using ejabberdctl. Try ejabberd_xmlrpc.\n\n"]
end,
print(["\n", NameFmt, "\n", ArgsFmt, "\n", ReturnsFmt, "\n\n", XmlrpcFmt, TagsFmt, "\n\n", DescFmt, "\n\n", LongDescFmt, NoteEjabberdctl], []).
format_usage_ctype(Type, _Indentation)
when (Type==atom) or (Type==integer) or (Type==string) or (Type==binary) or (Type==rescode) or (Type==restuple)->
io_lib:format("~p", [Type]);
format_usage_ctype({Name, Type}, _Indentation)
when (Type==atom) or (Type==integer) or (Type==string) or (Type==binary) or (Type==rescode) or (Type==restuple)->
io_lib:format("~p::~p", [Name, Type]);
format_usage_ctype({Name, {list, ElementDef}}, Indentation) ->
NameFmt = atom_to_list(Name),
Indentation2 = Indentation + length(NameFmt) + 4,
ElementFmt = format_usage_ctype(ElementDef, Indentation2),
[NameFmt, "::[ ", ElementFmt, " ]"];
format_usage_ctype({Name, {tuple, ElementsDef}}, Indentation) ->
NameFmt = atom_to_list(Name),
Indentation2 = Indentation + length(NameFmt) + 4,
ElementsFmt = format_usage_tuple(ElementsDef, Indentation2),
[NameFmt, "::{ " | ElementsFmt].
format_usage_tuple([], _Indentation) ->
[];
format_usage_tuple([ElementDef], Indentation) ->
[format_usage_ctype(ElementDef, Indentation) , " }"];
format_usage_tuple([ElementDef | ElementsDef], Indentation) ->
ElementFmt = format_usage_ctype(ElementDef, Indentation),
MarginString = lists:duplicate(Indentation, $\s), % Put spaces
[ElementFmt, ",\n", MarginString, format_usage_tuple(ElementsDef, Indentation)].
print(Format, Args) ->
io:format(lists:flatten(Format), Args).
%%-----------------------------
%% Command management
%%-----------------------------
%%+++
%% Struct(Integer res) create_account(Struct(String user, String server, String password))
%%format_usage_xmlrpc(ArgsDef, ResultDef) ->
%% ["aaaa bbb ccc"].
-spec opt_type(atom()) -> fun((any()) -> any()) | [atom()].
opt_type(ejabberdctl_access_commands) ->
fun (V) when is_list(V) -> V end;
opt_type(_) -> [ejabberdctl_access_commands].
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