While that makes sense, and is how I was doing it originally, it does require issuing the connect() call twice, once before the select(), and once afterwards.
-Carl > On Jun 27, 2017, at 8:22 AM, t...@ivisit.com wrote: > > If the socket says it's ready to read or write, then I would read or write > whatever you planned on reading or writing, but be prepared to handle an > error. I think you will find that more robust than looking for particular > errors at particular times. > > > > On 2017-06-26 15:52, Carl Hoefs wrote: > >> >>> On Jun 26, 2017, at 3:37 PM, Dado Colussi <dado.colu...@gmail.com >>> <mailto:dado.colu...@gmail.com>> wrote: >>> After the connect() returns EINPROGRESS, and after the select() indicates 1 >>> descriptor ready for write, getsockopt() returns status=0, errno=0: >>> >>> status = getsockopt(sockfd,SOL_SOCKET,SO_ERROR,&error,&len); >>> >>> >>> getsockopt() returns 0 on successful retrieval of the option value. So >>> that's good. >>> >>> The option value is stored in memory pointed to by the fourth parameter >>> (named 'error', above). Hence the variable error == ECONNREFUSED. >> >> Yes, it does indeed return ECONNREFUSED, errno = 61, "Interrupted system >> call" into my error variable! (I thought it would also set errno, but it >> doesn't.) >> >> Thanks; this is exactly what I was looking for! >> >> -Carl >> >> >> >> >> _______________________________________________ >> Do not post admin requests to the list. They will be ignored. >> Macnetworkprog mailing list (Macnetworkprog@lists.apple.com >> <mailto:Macnetworkprog@lists.apple.com>) >> Help/Unsubscribe/Update your Subscription: >> https://lists.apple.com/mailman/options/macnetworkprog/tim%40ivisit.com >> <https://lists.apple.com/mailman/options/macnetworkprog/tim%40ivisit.com> >> >> This email sent to t...@ivisit.com <mailto:t...@ivisit.com>
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