%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2005-2016. 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, Ssh) ->
format("~s", [listify(Prompt)]),
proplists:get_value(user_pid, Ssh) ! {self(), question},
receive
Answer ->
Answer
end.
yes_no(Prompt, Ssh) ->
io:format("~s [y/n]?", [Prompt]),
proplists:get_value(user_pid, Ssh#ssh.opts) ! {self(), question},
receive
Answer ->
case trim(Answer) of
"y" -> yes;
"n" -> no;
"Y" -> yes;
"N" -> no;
y -> yes;
n -> no;
_ ->
io:format("please answer y or n\n"),
yes_no(Prompt, Ssh)
end
end.
read_password(Prompt, Ssh) ->
format("~s", [listify(Prompt)]),
case is_list(Ssh) of
false ->
proplists:get_value(user_pid, Ssh#ssh.opts) ! {self(), user_password};
_ ->
proplists:get_value(user_pid, Ssh) ! {self(), user_password}
end,
receive
Answer ->
case Answer of
"" ->
read_password(Prompt, Ssh);
Pass -> Pass
end
end.
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).
format(Fmt, Args) ->
io:format(Fmt, Args).
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.
