1%%
2%% %CopyrightBegin%
3%%
4%% Copyright Ericsson AB 2005-2017. All Rights Reserved.
5%%
6%% Licensed under the Apache License, Version 2.0 (the "License");
7%% you may not use this file except in compliance with the License.
8%% You may obtain a copy of the License at
9%%
10%%     http://www.apache.org/licenses/LICENSE-2.0
11%%
12%% Unless required by applicable law or agreed to in writing, software
13%% distributed under the License is distributed on an "AS IS" BASIS,
14%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15%% See the License for the specific language governing permissions and
16%% limitations under the License.
17%%
18%% %CopyrightEnd%
19%%
20
21%%
22
23%%% Description: user interaction for SSH
24
25-module(ssh_io).
26
27-export([yes_no/2, read_password/2, read_line/2, format/2]).
28-include("ssh.hrl").
29
30read_line(Prompt, _Opts) ->
31    format("~s", [listify(Prompt)]),
32    unicode:characters_to_list(io:get_line("")).
33
34yes_no(Prompt, Opts) ->
35    format("~s [y/n]?", [Prompt]),
36    case trim(io:get_line("")) of
37        "y" -> yes;
38        "n" -> no;
39        "Y" -> yes;
40        "N" -> no;
41        _ ->
42            format("please answer y or n\n",[]),
43            yes_no(Prompt, Opts)
44    end.
45
46read_password(Prompt, Opts) ->
47    format("~s", [listify(Prompt)]),
48    case trim(io:get_password()) of
49        "" ->
50            read_password(Prompt, Opts);
51        Pwd ->
52            Pwd
53    end.
54
55format(Fmt, Args) ->
56    io:format(Fmt, Args).
57
58%%%================================================================
59listify(A) when is_atom(A)   -> atom_to_list(A);
60listify(L) when is_list(L)   -> L;
61listify(B) when is_binary(B) -> binary_to_list(B).
62
63
64trim(Line) when is_list(Line) ->
65    lists:reverse(trim1(lists:reverse(trim1(Line))));
66trim(Line) when is_binary(Line) ->
67    trim(unicode:characters_to_list(Line));
68trim(Other) -> Other.
69
70trim1([$\s|Cs]) -> trim(Cs);
71trim1([$\r|Cs]) -> trim(Cs);
72trim1([$\n|Cs]) -> trim(Cs);
73trim1([$\t|Cs]) -> trim(Cs);
74trim1(Cs) -> Cs.
75