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SIGIO, siginfo


i have a few questions about our SIGIO/siginfo.

- is there any documentation about how our kernel fills siginfo for SIGIO?
  is it intended to be compatible with something?  eg. linux?

- siginfo.h and siginfo(2) mention SIGPOLL which actually does not exist.
  should they be just removed?

- why did you make POLL_HUP == POLL_ERR?


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