Override and fire custom FS.stdin

[MateoLa]

I would like to get C++ std::cin calling a custom JS FS.stdin.

I have tried in the main JS thread using emscripten_set_main_loop with a pure vanilla JS as you can see here:
https://github.com/MateoLa/wasm-eg/tree/master/guess/nocomm

I have also tried in the main thread using emscripten_set_main_loop with an es6 module as you can see here:
https://github.com/MateoLa/wasm-eg/tree/master/guess/norun

I have also tried running the es6 module in a background worker, blocking its thread (without emscripten_set_main_loop), as you can see here:
https://github.com/MateoLa/wasm-eg/tree/master/guess/worker

My goal is to port Stockfish which works writing commands to stdin and returning outputs on stdout.

Can you provide a working example about how to override and call a custom FS.stdin function?

[sbc100]

I believe you can just set Module['stdin'] before you load the module. See test_module_stdin in test_other.py.

I'm afraid this doesn't seem to be documented anywhere..

[sbc100]

In the long run you a probably better of creating some kind of API that you can call from JS rather that relying on stdin and stdout only. Most code (including stockfish I imagine) will likely already be setup for this kind of thing.