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ipc: Ensure server's socket is in non-blocking mode.

Neal H. Walfield requested to merge neal/non-blocking-socket into main

  • According to the documentation for TcpListener::from_std the passed socket must be in non-blocking mode:

    The caller is responsible for ensuring that the listener is in non-blocking mode. Otherwise all I/O operations on the listener will block the thread, which will cause unexpected behavior. Non-blocking mode can be set using set_nonblocking.

    • Make sure that is the case for any socket we pass to TcpListener::from_std.

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