On Sun, Mar 16, 2014 at 10:25 AM, Merijn Verstraaten wrote: threadWaitError :: Fd -> IO ()
threadWaitErrorSTM :: Fd -> IO (STM (), IO ()) to allow for blocking on detecting error condition on file descriptors,
similar to what C's select() allows. If you mean the third bitmask, it is not for errors (notwithstanding the
documentation on some systems); an "exceptional condition" is not an error,
it's MSG_OOB data. Errors show as "ready" on the appropriate mask (read or
write) since a read (resp. write) will return immediately with the error
instead of blocking.
See
http://stackoverflow.com/questions/1342712/nix-select-and-exceptfds-errorfds...
http://man7.org/linux/man-pages/man2/select_tut.2.html for more information.
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brandon s allbery kf8nh sine nomine associates
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