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In the 2004 version of the 1003.1 POSIX standard by the Open Group there is no mention of SIGIO.

Why is that?

Tyler Durden
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  • You could improve this question by explaining why you would expect it to be POSIX. As it stands, I could simply answer with "because SIGIO isn't POSIX". – terdon Jul 08 '17 at 18:01
  • A related question is https://unix.stackexchange.com/questions/377209/ . – JdeBP Jul 09 '17 at 13:30

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