%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2005-2017. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%
%% %CopyrightEnd%
%%
%%
%%% Description: user interaction for SSH
-module(ssh_io).
-export([yes_no/2, read_password/2, read_line/2, format/2]).
-include("ssh.hrl").
read_line(Prompt, Opts) ->
format("~s", [listify(Prompt)]),
?GET_INTERNAL_OPT(user_pid, Opts) ! {self(), question},
receive
Answer when is_list(Answer) or is_binary(Answer) ->
unicode:characters_to_list(Answer)
end.
yes_no(Prompt, Opts) ->
format("~s [y/n]?", [Prompt]),
?GET_INTERNAL_OPT(user_pid, Opts) ! {self(), question},
receive
%% I can't see that the atoms y and n are ever received, but it must
%% be investigated before removing
y -> yes;
n -> no;
Answer when is_list(Answer) or is_binary(Answer) ->
case trim(Answer) of
"y" -> yes;
"n" -> no;
"Y" -> yes;
"N" -> no;
_ ->
format("please answer y or n\n",[]),
yes_no(Prompt, Opts)
end
end.
read_password(Prompt, Opts) ->
format("~s", [listify(Prompt)]),
?GET_INTERNAL_OPT(user_pid, Opts) ! {self(), user_password},
receive
Answer when is_list(Answer) or is_binary(Answer) ->
case trim(Answer) of
"" ->
read_password(Prompt, Opts);
Pwd ->
Pwd
end
end.
format(Fmt, Args) ->
io:format(Fmt, Args).
%%%================================================================
listify(A) when is_atom(A) -> atom_to_list(A);
listify(L) when is_list(L) -> L;
listify(B) when is_binary(B) -> binary_to_list(B).
trim(Line) when is_list(Line) ->
lists:reverse(trim1(lists:reverse(trim1(Line))));
trim(Line) when is_binary(Line) ->
trim(unicode:characters_to_list(Line));
trim(Other) -> Other.
trim1([$\s|Cs]) -> trim(Cs);
trim1([$\r|Cs]) -> trim(Cs);
trim1([$\n|Cs]) -> trim(Cs);
trim1([$\t|Cs]) -> trim(Cs);
trim1(Cs) -> Cs.
