#@noob Low-level fcntl() call is exposed and you can set O_NONBLOCK. However, we don't have a specific support of nonblocking I/O yet (except sys-accept, which returns #f immediately if the listening socket is nonblocking mode), I believe. That is, you should handle EAGAIN by yourself. It's just that we haven't had a use case for that---if there's a demand, we can add support.
Gauche > Archives > 2025/11/07