RFR: 8362116: System.in.read() etc. don't accept input once immediate Ctrl+D pressed in JShell [v3]

[Chen Liang]

On Mon, 14 Jul 2025 19:18:25 GMT, Jan Lahoda <jlahoda at openjdk.org> wrote:

>> When in JShell, doing:
>> 
>> jshell> IO.readln();
>> //Ctrl-D
>> $1 ==> null
>> 
>> jshell> IO.readln()
>> $2 ==> null //no input allowed
>> 
>> 
>> Where relying input from the main process to the remote/agent process, need to propagate `-1` as `-1` without close, which is what this PR is attempting to do.
>
> Jan Lahoda has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Fixing test.

Marked as reviewed by liach (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/26292#pullrequestreview-3018076292