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%%%---------------------------------------------------------------------- |
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%%% File : ejabberd_ctl.erl |
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%%% Author : Alexey Shchepin <alexey@process-one.net> |
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%%% Purpose : ejabberd command line admin tool |
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%%% Created : 11 Jan 2004 by Alexey Shchepin <alexey@process-one.net> |
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%%% |
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%%% |
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%%% ejabberd, Copyright (C) 2002-2011 ProcessOne |
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%%% |
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%%% This program is free software; you can redistribute it and/or |
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%%% modify it under the terms of the GNU General Public License as |
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%%% published by the Free Software Foundation; either version 2 of the |
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%%% License, or (at your option) any later version. |
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%%% |
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%%% This program is distributed in the hope that it will be useful, |
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%%% but WITHOUT ANY WARRANTY; without even the implied warranty of |
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%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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%%% General Public License for more details. |
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%%% |
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%%% You should have received a copy of the GNU General Public License |
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%%% along with this program; if not, write to the Free Software |
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%%% Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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%%% |
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%%%---------------------------------------------------------------------- |
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%%% @headerfile "ejabberd_ctl.hrl" |
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%%% @doc Management of mongooseimctl commands and frontend to ejabberd commands. |
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%%% |
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%%% An mongooseimctl command is an abstract function identified by a |
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%%% name, with a defined number of calling arguments, that can be |
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%%% defined in any Erlang module and executed using mongooseimctl |
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%%% administration script. |
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%%% |
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%%% Note: strings cannot have blankspaces |
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%%% |
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%%% Does not support commands that have arguments with ctypes: list, tuple |
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%%% |
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%%% TODO: Update the guide |
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%%% TODO: Mention this in the release notes |
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%%% Note: the commands with several words use now the underline: _ |
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-module(ejabberd_ctl). |
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-author('alexey@process-one.net'). |
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|
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-export([start/0, |
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process/1]). |
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-ignore_xref([process/1, start/0]). |
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|
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-include("ejabberd_ctl.hrl"). |
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-include("mongoose_logger.hrl"). |
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|
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-type cmd() :: {CallString :: string(), Args :: [string()], Desc :: string()}. |
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|
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-define(ASCII_SPACE_CHARACTER, $\s). |
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-define(PRINT(Format, Args), io:format(lists:flatten(Format), Args)). |
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-define(TIME_HMS_FORMAT, "~B days ~2.10.0B:~2.10.0B:~2.10.0B"). |
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-define(a2l(A), atom_to_list(A)). |
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|
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%%----------------------------- |
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%% Module |
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%%----------------------------- |
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|
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-spec start() -> none(). |
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start() -> |
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:-( |
case init:get_plain_arguments() of |
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[SNode | Args] -> |
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:-( |
SNode1 = case string:tokens(SNode, "@") of |
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[_Node, _Server] -> |
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:-( |
SNode; |
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_ -> |
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:-( |
case net_kernel:longnames() of |
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true -> |
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:-( |
SNode ++ "@" ++ inet_db:gethostname() ++ |
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"." ++ inet_db:res_option(domain); |
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false -> |
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:-( |
SNode ++ "@" ++ inet_db:gethostname(); |
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_ -> |
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:-( |
SNode |
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end |
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end, |
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:-( |
Node = list_to_atom(SNode1), |
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:-( |
Status = case rpc:call(Node, ?MODULE, process, [Args]) of |
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{badrpc, Reason} -> |
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:-( |
?PRINT("Failed RPC connection to the node ~p: ~p~n", |
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[Node, Reason]), |
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%% TODO: show minimal start help |
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:-( |
?STATUS_BADRPC; |
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S -> |
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:-( |
S |
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end, |
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:-( |
halt(Status); |
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_ -> |
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:-( |
print_usage(), |
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:-( |
halt(?STATUS_USAGE) |
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end. |
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%%----------------------------- |
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%% Process |
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%%----------------------------- |
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%% @doc The commands status, stop and restart are defined here to ensure |
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%% they are usable even if ejabberd is completely stopped. |
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-spec process(_) -> integer(). |
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process(["status"]) -> |
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{InternalStatus, ProvidedStatus} = init:get_status(), |
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MongooseStatus = get_mongoose_status(), |
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?PRINT("~s", [format_status([{node, node()}, {internal_status, InternalStatus}, |
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{provided_status, ProvidedStatus}, |
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{mongoose_status, MongooseStatus}, |
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{os_pid, os:getpid()}, get_uptime(), |
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{dist_proto, get_dist_proto()}, |
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{logs, mongoose_logs:get_log_files()}])]), |
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case MongooseStatus of |
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:-( |
not_running -> ?STATUS_ERROR; |
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{running, _, _Version} -> ?STATUS_SUCCESS |
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end; |
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process(["stop"]) -> |
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%%ejabberd_cover:stop(), |
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:-( |
init:stop(), |
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:-( |
?STATUS_SUCCESS; |
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process(["restart"]) -> |
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:-( |
init:restart(), |
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:-( |
?STATUS_SUCCESS; |
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process(["mnesia", "info"]) -> |
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:-( |
mnesia:info(), |
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:-( |
?STATUS_SUCCESS; |
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process(["graphql", Arg]) when is_list(Arg) -> |
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Doc = list_to_binary(Arg), |
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Ep = mongoose_graphql:get_endpoint(admin), |
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Result = mongoose_graphql:execute_cli(Ep, undefined, Doc), |
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handle_graphql_result(Result); |
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process(["graphql" | _]) -> |
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?PRINT("This command requires one string type argument!\n", []), |
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?STATUS_ERROR; |
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|
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%% @doc The arguments --long and --dual are not documented because they are |
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%% automatically selected depending in the number of columns of the shell |
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process(["help" | Mode]) -> |
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{MaxC, ShCode} = get_shell_info(), |
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case Mode of |
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[] -> |
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print_usage(dual, MaxC, ShCode), |
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?STATUS_USAGE; |
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["--dual"] -> |
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print_usage(dual, MaxC, ShCode), |
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?STATUS_USAGE; |
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["--long"] -> |
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print_usage(long, MaxC, ShCode), |
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?STATUS_USAGE; |
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[_] -> |
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print_usage(dual, MaxC, ShCode), |
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?STATUS_USAGE |
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end; |
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process(Args) -> |
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case mongoose_graphql_commands:process(Args) of |
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#{status := executed, result := Result} -> |
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handle_graphql_result(Result); |
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#{status := error, reason := no_args} = Ctx -> |
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print_usage(Ctx), |
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?STATUS_USAGE; |
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#{status := error} = Ctx -> |
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?PRINT(error_message(Ctx) ++ "\n\n", []), |
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print_usage(Ctx), |
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?STATUS_ERROR; |
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#{status := usage} = Ctx -> |
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print_usage(Ctx), |
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?STATUS_SUCCESS % not STATUS_USAGE, as that would tell the script to print general help |
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end. |
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|
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-spec error_message(mongoose_graphql_commands:context()) -> iolist(). |
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error_message(#{reason := unknown_command, command := Command}) -> |
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io_lib:format("Unknown command '~s'", [Command]); |
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error_message(#{reason := invalid_args}) -> |
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"Could not parse the command arguments"; |
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error_message(#{reason := unknown_category}) -> |
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"Unknown category"; |
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error_message(#{reason := {unknown_arg, ArgName}, command := Command}) -> |
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io_lib:format("Unknown argument '~s' for command '~s'", [ArgName, Command]); |
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error_message(#{reason := {invalid_arg_value, ArgName, ArgValue}, command := Command}) -> |
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io_lib:format("Invalid value '~s' of argument '~s' for command '~s'", |
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[ArgValue, ArgName, Command]); |
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error_message(#{reason := {missing_args, MissingArgs}, command := Command}) -> |
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io_lib:format("Missing mandatory arguments for command '~s': ~s", |
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[Command, ["'", lists:join("', '", MissingArgs), "'"]]). |
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|
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-spec print_usage(mongoose_graphql_commands:context()) -> any(). |
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print_usage(#{category := Category, command := Command, args_spec := ArgsSpec}) -> |
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print_usage_command(Category, Command, ArgsSpec); |
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print_usage(#{category := Category, commands := Commands}) -> |
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print_usage_category(Category, Commands); |
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print_usage(_) -> |
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{MaxC, ShCode} = get_shell_info(), |
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print_usage(dual, MaxC, ShCode). |
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|
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handle_graphql_result({ok, Result}) -> |
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JSONResult = mongoose_graphql_response:term_to_pretty_json(Result), |
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?PRINT("~s\n", [JSONResult]), |
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case Result of |
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#{errors := _} -> ?STATUS_ERROR; |
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_ -> ?STATUS_SUCCESS |
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end; |
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handle_graphql_result({error, Reason}) -> |
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{_Code, Error} = mongoose_graphql_errors:format_error(Reason), |
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JSONResult = jiffy:encode(#{errors => [Error]}, [pretty]), |
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?PRINT("~s\n", [JSONResult]), |
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?STATUS_ERROR. |
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|
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%%----------------------------- |
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%% Format arguments |
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%%----------------------------- |
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format_status([{node, Node}, {internal_status, IS}, {provided_status, PS}, |
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{mongoose_status, MS}, {os_pid, OSPid}, {uptime, UptimeHMS}, |
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{dist_proto, DistProto}, {logs, LogFiles}]) -> |
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( ["MongooseIM node ", ?a2l(Node), ":\n", |
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" operating system pid: ", OSPid, "\n", |
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" Erlang VM status: ", ?a2l(IS), " (of: starting | started | stopping)\n", |
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" boot script status: ", io_lib:format("~p", [PS]), "\n", |
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" version: ", case MS of |
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{running, App, Version} -> [Version, " (as ", ?a2l(App), ")"]; |
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:-( |
not_running -> "unavailable - neither ejabberd nor mongooseim is running" |
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end, "\n", |
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" uptime: ", io_lib:format(?TIME_HMS_FORMAT, UptimeHMS), "\n", |
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" distribution protocol: ", DistProto, "\n"] ++ |
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:-( |
[" logs: none - maybe enable logging to a file in app.config?\n" || LogFiles == [] ] ++ |
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[" logs:\n" || LogFiles /= [] ] ++ [ |
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[" ", LogFile, "\n"] || LogFile <- LogFiles ] ). |
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|
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%%----------------------------- |
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%% Print help |
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%%----------------------------- |
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|
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%% Bold |
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-define(B1, "\e[1m"). |
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-define(B2, "\e[22m"). |
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-define(B(S), case ShCode of true -> [?B1, S, ?B2]; false -> S end). |
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|
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%% Underline |
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-define(U1, "\e[4m"). |
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-define(U2, "\e[24m"). |
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-define(U(S), case ShCode of true -> [?U1, S, ?U2]; false -> S end). |
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print_usage() -> |
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:-( |
{MaxC, ShCode} = get_shell_info(), |
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:-( |
print_usage(dual, MaxC, ShCode). |
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|
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|
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-spec print_usage(dual | long, MaxC :: integer(), ShCode :: boolean()) -> ok. |
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print_usage(HelpMode, MaxC, ShCode) -> |
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?PRINT(["Usage: ", ?B("mongooseimctl"), " [", ?U("category"), "] ", ?U("command"), |
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" [", ?U("arguments"), "]\n\n" |
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"Most MongooseIM commands are grouped into the following categories:\n"], []), |
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print_categories(HelpMode, MaxC, ShCode), |
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?PRINT(["\nTo list the commands in a particular category:\n mongooseimctl ", ?U("category"), |
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"\n"], []). |
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|
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-spec print_categories(dual | long, MaxC :: integer(), ShCode :: boolean()) -> ok. |
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print_categories(HelpMode, MaxC, ShCode) -> |
261 |
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SortedSpecs = lists:sort(maps:to_list(mongoose_graphql_commands:get_specs())), |
262 |
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Categories = [{binary_to_list(Category), [], binary_to_list(Desc)} |
263 |
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|| {Category, #{desc := Desc}} <- SortedSpecs], |
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print_usage_commands(HelpMode, MaxC, ShCode, Categories). |
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|
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-spec print_usage_category(mongoose_graphql_commands:category(), |
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mongoose_graphql_commands:command_map()) -> ok. |
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print_usage_category(Category, Commands) -> |
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3 |
{MaxC, ShCode} = get_shell_info(), |
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3 |
?PRINT(["Usage: ", ?B("mongooseimctl"), " ", Category, " ", ?U("command"), " ", ?U("arguments"), "\n" |
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"\n" |
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"The following commands are available in the category '", Category, "':\n"], []), |
273 |
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CmdSpec = [{binary_to_list(Command), [], binary_to_list(Desc)} |
274 |
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|| {Command, #{desc := Desc}} <- maps:to_list(Commands)], |
275 |
3 |
print_usage_commands(dual, MaxC, ShCode, CmdSpec), |
276 |
3 |
?PRINT(["\nTo list the arguments for a particular command:\n" |
277 |
3 |
" mongooseimctl ", Category, " ", ?U("command"), " --help", "\n"], []). |
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|
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-spec print_usage_command(mongoose_graphql_commands:category(), |
280 |
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mongoose_graphql_commands:command(), |
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[mongoose_graphql_commands:arg_spec()]) -> ok. |
282 |
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print_usage_command(Category, Command, ArgsSpec) -> |
283 |
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{MaxC, ShCode} = get_shell_info(), |
284 |
8 |
?PRINT(["Usage: ", ?B("mongooseimctl"), " ", Category, " ", Command, " ", ?U("arguments"), "\n" |
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"\n", |
286 |
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"Each argument has the format: --", ?U("name"), " ", ?U("value"), "\n", |
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"Available arguments are listed below with the corresponding GraphQL types:\n"], []), |
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%% Reuse the function initially designed for printing commands for now |
289 |
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%% This will be replaced with new logic when old commands are dropped |
290 |
8 |
Args = [{binary_to_list(Name), [], mongoose_graphql_commands:wrap_type(Wrap, Type)} |
291 |
8 |
|| #{name := Name, type := Type, wrap := Wrap} <- ArgsSpec], |
292 |
8 |
print_usage_commands(dual, MaxC, ShCode, Args), |
293 |
8 |
?PRINT(["\nScalar values do not need quoting unless they contain special characters or spaces.\n" |
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"Complex input types are passed as JSON maps or lists, depending on the type.\n" |
295 |
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"When a type is followed by '!', the corresponding argument is required.\n"], []). |
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|
297 |
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-spec print_usage_commands(HelpMode :: 'dual' | 'long', |
298 |
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MaxC :: integer(), |
299 |
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ShCode :: boolean(), |
300 |
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Commands :: [cmd(), ...]) -> 'ok'. |
301 |
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print_usage_commands(HelpMode, MaxC, ShCode, Commands) -> |
302 |
18 |
CmdDescsSorted = lists:keysort(1, Commands), |
303 |
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|
304 |
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%% What is the length of the largest command? |
305 |
18 |
{CmdArgsLenDescsSorted, Lens} = |
306 |
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lists:mapfoldl( |
307 |
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fun({Cmd, Args, Desc}, Lengths) -> |
308 |
180 |
Len = |
309 |
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length(Cmd) + |
310 |
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lists:foldl(fun(Arg, R) -> |
311 |
:-( |
R + 1 + length(Arg) |
312 |
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end, |
313 |
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0, |
314 |
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Args), |
315 |
180 |
{{Cmd, Args, Len, Desc}, [Len | Lengths]} |
316 |
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end, |
317 |
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[], |
318 |
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CmdDescsSorted), |
319 |
18 |
MaxCmdLen = case Lens of |
320 |
:-( |
[] -> 80; |
321 |
18 |
_ -> lists:max(Lens) |
322 |
|
end, |
323 |
|
|
324 |
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%% For each command in the list of commands |
325 |
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%% Convert its definition to a line |
326 |
18 |
FmtCmdDescs = format_command_lines(CmdArgsLenDescsSorted, MaxCmdLen, MaxC, ShCode, HelpMode), |
327 |
18 |
?PRINT([FmtCmdDescs], []). |
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|
|
329 |
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%% @doc Get some info about the shell: how many columns of width and guess if |
330 |
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%% it supports text formatting codes. |
331 |
|
-spec get_shell_info() -> {integer(), boolean()}. |
332 |
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get_shell_info() -> |
333 |
18 |
case io:columns() of |
334 |
:-( |
{ok, C} -> {C-2, true}; |
335 |
18 |
{error, enotsup} -> {78, false} |
336 |
|
end. |
337 |
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|
338 |
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%% @doc Split this command description in several lines of proper length |
339 |
|
-spec prepare_description(DescInit :: non_neg_integer(), |
340 |
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MaxC :: integer(), |
341 |
|
Desc :: string()) -> [[[any()]], ...]. |
342 |
|
prepare_description(DescInit, MaxC, Desc) -> |
343 |
180 |
Words = string:tokens(Desc, " \n"), |
344 |
180 |
prepare_long_line(DescInit, MaxC, Words). |
345 |
|
|
346 |
|
-spec prepare_long_line(DescInit :: non_neg_integer(), |
347 |
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MaxC :: integer(), |
348 |
|
Words :: [nonempty_string()] |
349 |
|
) -> [[[any()]], ...]. |
350 |
|
prepare_long_line(DescInit, MaxC, Words) -> |
351 |
180 |
MaxSegmentLen = MaxC - DescInit, |
352 |
180 |
MarginString = lists:duplicate(DescInit, ?ASCII_SPACE_CHARACTER), % Put spaces |
353 |
180 |
[FirstSegment | MoreSegments] = split_desc_segments(MaxSegmentLen, Words), |
354 |
180 |
MoreSegmentsMixed = mix_desc_segments(MarginString, MoreSegments), |
355 |
180 |
[FirstSegment | MoreSegmentsMixed]. |
356 |
|
|
357 |
|
-spec mix_desc_segments(MarginStr :: [any()], |
358 |
|
Segments :: [[[any(), ...]]]) -> [[[any()], ...]]. |
359 |
|
mix_desc_segments(MarginString, Segments) -> |
360 |
180 |
[["\n", MarginString, Segment] || Segment <- Segments]. |
361 |
|
|
362 |
|
split_desc_segments(MaxL, Words) -> |
363 |
180 |
join(MaxL, Words). |
364 |
|
|
365 |
|
%% @doc Join words in a segment, but stop adding to a segment if adding this |
366 |
|
%% word would pass L |
367 |
|
-spec join(L :: number(), Words :: [nonempty_string()]) -> [[[any(), ...]], ...]. |
368 |
|
join(L, Words) -> |
369 |
180 |
join(L, Words, 0, [], []). |
370 |
|
|
371 |
|
|
372 |
|
-spec join(L :: number(), |
373 |
|
Words :: [nonempty_string()], |
374 |
|
LenLastSeg :: non_neg_integer(), |
375 |
|
LastSeg :: [nonempty_string()], |
376 |
|
ResSeg :: [[[any(), ...]]] ) -> [[[any(), ...]], ...]. |
377 |
|
join(_L, [], _LenLastSeg, LastSeg, ResSeg) -> |
378 |
180 |
ResSeg2 = [lists:reverse(LastSeg) | ResSeg], |
379 |
180 |
lists:reverse(ResSeg2); |
380 |
|
join(L, [Word | Words], LenLastSeg, LastSeg, ResSeg) -> |
381 |
747 |
LWord = length(Word), |
382 |
747 |
case LWord + LenLastSeg < L of |
383 |
|
true -> |
384 |
|
%% This word fits in the last segment |
385 |
|
%% If this word ends with "\n", reset column counter |
386 |
738 |
case string:str(Word, "\n") of |
387 |
|
0 -> |
388 |
738 |
join(L, Words, LenLastSeg+LWord+1, [" ", Word | LastSeg], ResSeg); |
389 |
|
_ -> |
390 |
:-( |
join(L, Words, LWord+1, [" ", Word | LastSeg], ResSeg) |
391 |
|
end; |
392 |
|
false -> |
393 |
9 |
join(L, Words, LWord, [" ", Word], [lists:reverse(LastSeg) | ResSeg]) |
394 |
|
end. |
395 |
|
|
396 |
|
-spec format_command_lines(CALD :: [{[any()], [any()], number(), _}, ...], |
397 |
|
MaxCmdLen :: integer(), |
398 |
|
MaxC :: integer(), |
399 |
|
ShCode :: boolean(), |
400 |
|
'dual' | 'long') -> [[any(), ...], ...]. |
401 |
|
format_command_lines(CALD, MaxCmdLen, MaxC, ShCode, dual) |
402 |
|
when MaxC - MaxCmdLen < 40 -> |
403 |
|
%% If the space available for descriptions is too narrow, enforce long help mode |
404 |
:-( |
format_command_lines(CALD, MaxCmdLen, MaxC, ShCode, long); |
405 |
|
format_command_lines(CALD, MaxCmdLen, MaxC, ShCode, dual) -> |
406 |
17 |
lists:map( |
407 |
|
fun({Cmd, Args, CmdArgsL, Desc}) -> |
408 |
160 |
DescFmt = prepare_description(MaxCmdLen+4, MaxC, Desc), |
409 |
160 |
[" ", ?B(Cmd), " ", [[?U(Arg), " "] || Arg <- Args], string:chars(?ASCII_SPACE_CHARACTER, MaxCmdLen - CmdArgsL + 1), |
410 |
|
DescFmt, "\n"] |
411 |
|
end, CALD); |
412 |
|
format_command_lines(CALD, _MaxCmdLen, MaxC, ShCode, long) -> |
413 |
1 |
lists:map( |
414 |
|
fun({Cmd, Args, _CmdArgsL, Desc}) -> |
415 |
20 |
DescFmt = prepare_description(8, MaxC, Desc), |
416 |
20 |
["\n ", ?B(Cmd), " ", [[?U(Arg), " "] || Arg <- Args], "\n", " ", |
417 |
|
DescFmt, "\n"] |
418 |
|
end, CALD). |
419 |
|
|
420 |
|
%%----------------------------- |
421 |
|
%% Print usage command |
422 |
|
%%----------------------------- |
423 |
|
|
424 |
|
get_mongoose_status() -> |
425 |
2 |
case lists:keyfind(mongooseim, 1, application:which_applications()) of |
426 |
|
false -> |
427 |
:-( |
not_running; |
428 |
|
{_, _, Version} -> |
429 |
2 |
{running, mongooseim, Version} |
430 |
|
end. |
431 |
|
|
432 |
|
get_uptime() -> |
433 |
2 |
{MilliSeconds, _} = erlang:statistics(wall_clock), |
434 |
2 |
{D, {H, M, S}} = calendar:seconds_to_daystime(MilliSeconds div 1000), |
435 |
2 |
{uptime, [D, H, M, S]}. |
436 |
|
|
437 |
|
get_dist_proto() -> |
438 |
|
%% See kernel/src/net_kernel.erl |
439 |
2 |
case init:get_argument(proto_dist) of |
440 |
:-( |
{ok, [Proto]} -> Proto; |
441 |
2 |
_ -> "inet_tcp" |
442 |
|
end. |