stty -cooked not usable since cygwin-3.1.1-1

Rabbe Fogelholm
Tue Jul 28 13:56:54 GMT 2020

Rabbe Fogelholm wrote:
> Takashi Yano wrote:
>> On Mon, 13 Jan 2020 11:52:43 +0100
>> Rabbe Fogelholm wrote:
>>> I am running a console Java program that is started from a shellscript
>>> wrapper. Before invoking Java the wrapper calls `stty -cooked'. The Java
>>> program polls the keyboard using and reads
>>> characters immediately using, without waiting for the
>>> Enter key to be pressed.
>>> This way of combining `stty -cooked' and Java has stopped working since
>>> version 3.1.1-1 of the Cygwin package. The Java thread that reads the
>>> keyboard hangs until Enter is pressed, which is not desirable.
>>> I had to downgrade to version 3.0.7-1 to resolve the problem.
>>> Versioning information:
>>> java version "1.8.0_202"
>>> Java(TM) SE Runtime Environment (build 1.8.0_202-b08)
>>> Java HotSpot(TM) 64-Bit Server VM (build 25.202-b08, mixed mode)
>>> OS Name: Microsoft Windows 10 Pro
>>> Version: 10.0.17763 Build 17763
>>> System Type: x64-based PC
>>> See also the enclosed cygcheck.out.
>>> To demonstrate the issue I enclose a small Java program that should be
>>> able to read single keystrokes when `stty -cooked' is in effect.
>> Does your java program work in command prompt? cygwin 3.1.x uses
>> pseudo console, so the native (non cygwin) program works as if it
>> is executed in command prompt.
> With cygwin 3.1.x I can't find a way to make my program work.
> When running from within a Cygwin64 terminal the `stty -cooked' command
> terminates with exit code 0, but the Java program behaves just as if
> `stty -cooked' is not in effect: It does not handle single keystrokes
> immediately.
> When running from a Windows command prompt I can execute the stty
> program as \cygwin64\bin\stty. However, when given the '-cooked'
> argument it complains:
> /usr/bin/stty: 'standard input': unable to perform all requested operations
> - and here as well the Java program behaves as if `stty -cooked' is not
> in effect.

Some time has passed; I am just curious if anyone may have found a
solution to the "stty -cooked" issue. With cygwin-3.0.* it was possible
to have a Java program act on single keystrokes, with cygwin-3.1 I don't
know how to do it. Any ideas welcome!

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