The Scene: asynchronous socket creation

The Issue: select should return, and FD_ISSET should allow us to determine if the connection failed by checking the exceptions

The Reality: This works in Solaris (and I believe is posix-standard), but Linux seems to always return writable after the select, but wants us to check getsockopts to see if it is really writable.

Any socket gurus out there who can clue me in?

We're waiting after the connect() is issued for a certain delay (2 seconds in this case). During the delay, a connect signal can occur, or the wait can time out. At the end of the timeout, the code checks the exception mask to see if an exception occurred, or if the socket indicates write status.

Last night I discovered that EINPROGRESS on Linux will always eventually mean that the socket becomes writable -- an exception will never be set. You then have to check getsockopt(sock, SOL_SOCKET, SO_ERROR, &buf, &size) to see if a failed connection error was set. Really strange.