Re: Detecting a closed connection

On Mon, Apr 10, 2000 at 07:02:02PM +0200, [email protected] wrote:
> in a client/server system running on base of Event, I check for closed
> connections and remove all related data from the server process, inform
> other related clients and so on. This is done via an io read/error event
> watcher. The callback calls a function that first of all checks the
> handle/socket by fileno(). Quite simple, but it works perfectly if a
> client dies a usual way, e.g. by signal.
> 
> Now, it does NOT work if the client system is shut down by switching off
> its hardware. The server system does not recognize this (remote shells
> do not close etc.)

Correct.

> So, there seems to be no catchable event. Are there
> known strategies to detect such cases?

IIRC, heartbeats.

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