The BSD/unix API does not allow this for TCP sockets, as in tapping into the OS' knowledge of whether a connection was closed, the only way to learn that is by trying to write to it.

However with respect to Gambit knowing whether |close-port| was applied on a port, of course you should be able to retrieve that.

2018-03-24 16:29 GMT+08:00 Dimitris Vyzovitis <vyzo@hackzen.org>:

Is there a reasonable way to detect whether a port has been closed?

I want to implement input-port-open? and output-port-open? for r7rs coverage...

-- vyzo

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