kqueue alternative?
Stephen Montgomery-Smith
stephen at math.missouri.edu
Mon Jun 16 11:17:17 PDT 2003
>>Select doesn't work with files.
>
>
> Really? `man 2 select' says nothing about that. It just talks about
> 'file descriptors'. Now if it said 'socket descriptors' or 'non-file
> file descriptors' I would understand, but I don't think that that statement
> is implied by the man page. Is there something I'm missing?
>
Well I did a little experimentation. It looks like this. select will say that
a file is ready for reading if read(2) will not block. However, if you get to
an end of file, then read does not block, rather it returns 0 to indicate end of
file. Thus select will not block and will say that this file is ready for
reading. In essence, calling select will always say that a file is ready for
reading, and calling select serves no purpose.
Well I definitely learned something.
--
Stephen Montgomery-Smith
stephen at math.missouri.edu
http://www.math.missouri.edu/~stephen
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