diff options
Diffstat (limited to 'lib/kernel/src/group.erl')
| -rw-r--r-- | lib/kernel/src/group.erl | 79 |
1 files changed, 64 insertions, 15 deletions
diff --git a/lib/kernel/src/group.erl b/lib/kernel/src/group.erl index bf785959ff..6e2f2d1865 100644 --- a/lib/kernel/src/group.erl +++ b/lib/kernel/src/group.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1996-2017. All Rights Reserved. +%% Copyright Ericsson AB 1996-2016. 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. @@ -261,11 +261,11 @@ io_request({put_chars,latin1,M,F,As}, Drv, From, Buf) -> end; io_request({get_chars,Encoding,Prompt,N}, Drv, _From, Buf) -> - get_chars(Prompt, io_lib, collect_chars, N, Drv, Buf, Encoding); + get_chars_n(Prompt, io_lib, collect_chars, N, Drv, Buf, Encoding); io_request({get_line,Encoding,Prompt}, Drv, _From, Buf) -> - get_chars(Prompt, io_lib, collect_line, [], Drv, Buf, Encoding); + get_chars_line(Prompt, io_lib, collect_line, [], Drv, Buf, Encoding); io_request({get_until,Encoding, Prompt,M,F,As}, Drv, _From, Buf) -> - get_chars(Prompt, io_lib, get_until, {M,F,As}, Drv, Buf, Encoding); + get_chars_line(Prompt, io_lib, get_until, {M,F,As}, Drv, Buf, Encoding); io_request({get_password,_Encoding},Drv,_From,Buf) -> get_password_chars(Drv, Buf); io_request({setopts,Opts}, Drv, _From, Buf) when is_list(Opts) -> @@ -434,7 +434,7 @@ getopts(Drv,Buf) -> {ok,[Exp,Echo,Bin,Uni],Buf}. -%% get_chars(Prompt, Module, Function, XtraArgument, Drv, Buffer) +%% get_chars_*(Prompt, Module, Function, XtraArgument, Drv, Buffer) %% Gets characters from the input Drv until as the applied function %% returns {stop,Result,Rest}. Does not block output until input has been %% received. @@ -452,12 +452,21 @@ get_password_chars(Drv,Buf) -> {exit, terminated} end. -get_chars(Prompt, M, F, Xa, Drv, Buf, Encoding) -> +get_chars_n(Prompt, M, F, Xa, Drv, Buf, Encoding) -> + Pbs = prompt_bytes(Prompt, Encoding), + case get(echo) of + true -> + get_chars_loop(Pbs, M, F, Xa, Drv, Buf, start, Encoding); + false -> + get_chars_n_loop(Pbs, M, F, Xa, Drv, Buf, start, Encoding) + end. + +get_chars_line(Prompt, M, F, Xa, Drv, Buf, Encoding) -> Pbs = prompt_bytes(Prompt, Encoding), get_chars_loop(Pbs, M, F, Xa, Drv, Buf, start, Encoding). get_chars_loop(Pbs, M, F, Xa, Drv, Buf0, State, Encoding) -> - Result = case get(echo) of + Result = case get(echo) of true -> get_line(Buf0, Pbs, Drv, Encoding); false -> @@ -466,8 +475,8 @@ get_chars_loop(Pbs, M, F, Xa, Drv, Buf0, State, Encoding) -> get_line_echo_off(Buf0, Pbs, Drv) end, case Result of - {done,Line,Buf1} -> - get_chars_apply(Pbs, M, F, Xa, Drv, Buf1, State, Line, Encoding); + {done,Line,Buf} -> + get_chars_apply(Pbs, M, F, Xa, Drv, Buf, State, Line, Encoding); interrupted -> {error,{error,interrupted},[]}; terminated -> @@ -476,12 +485,29 @@ get_chars_loop(Pbs, M, F, Xa, Drv, Buf0, State, Encoding) -> get_chars_apply(Pbs, M, F, Xa, Drv, Buf, State0, Line, Encoding) -> case catch M:F(State0, cast(Line,get(read_mode), Encoding), Encoding, Xa) of - {stop,Result,Rest} -> - {ok,Result,append(Rest, Buf, Encoding)}; - {'EXIT',_} -> - {error,{error,err_func(M, F, Xa)},[]}; - State1 -> - get_chars_loop(Pbs, M, F, Xa, Drv, Buf, State1, Encoding) + {stop,Result,Rest} -> + {ok,Result,append(Rest, Buf, Encoding)}; + {'EXIT',_} -> + {error,{error,err_func(M, F, Xa)},[]}; + State1 -> + get_chars_loop(Pbs, M, F, Xa, Drv, Buf, State1, Encoding) + end. + +get_chars_n_loop(Pbs, M, F, Xa, Drv, Buf0, State, Encoding) -> + try M:F(State, cast(Buf0, get(read_mode), Encoding), Encoding, Xa) of + {stop,Result,Rest} -> + {ok, Result, Rest}; + State1 -> + case get_chars_echo_off(Pbs, Drv) of + interrupted -> + {error,{error,interrupted},[]}; + terminated -> + {exit,terminated}; + Buf -> + get_chars_n_loop(Pbs, M, F, Xa, Drv, Buf, State1, Encoding) + end + catch _:_ -> + {error,{error,err_func(M, F, Xa)},[]} end. %% Convert error code to make it look as before @@ -684,6 +710,29 @@ get_line_echo_off1({Chars,[]}, Drv) -> get_line_echo_off1({Chars,Rest}, _Drv) -> {done,lists:reverse(Chars),case Rest of done -> []; _ -> Rest end}. +get_chars_echo_off(Pbs, Drv) -> + send_drv_reqs(Drv, [{put_chars, unicode,Pbs}]), + get_chars_echo_off1(Drv). + +get_chars_echo_off1(Drv) -> + receive + {Drv, {data, Cs}} -> + Cs; + {Drv, eof} -> + eof; + {io_request,From,ReplyAs,Req} when is_pid(From) -> + io_request(Req, From, ReplyAs, Drv, []), + get_chars_echo_off1(Drv); + {reply,{{From,ReplyAs},Reply}} when From =/= undefined -> + %% We take care of replies from puts here as well + io_reply(From, ReplyAs, Reply), + get_chars_echo_off1(Drv); + {'EXIT',Drv,interrupt} -> + interrupted; + {'EXIT',Drv,_} -> + terminated + end. + %% We support line editing for the ICANON mode except the following %% line editing characters, which already has another meaning in %% echo-on mode (See Advanced Programming in the Unix Environment, 2nd ed, |