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--- Edgar Toernig <> wrote:
> Second: use non-blocking file handles together with
> select/poll-like system calls to dispatch reading
> and writing yourself.  That prohibits use of 
> stdio.  The stdio routines are not designed for non-
> blocking access and all kind of magic things 
> happen.  Even if you think you can get away with 
> select and blocking I/O (you're
> wrong btw) stdio won't play nice with you.

You hit the nail of the problem in general though I
would appreciate comment on this.

Can't I just use COPAS and non-blocking io on
stdin/stdout(i.e. fh 0/1) ? As it seems to me it is no
different than a program launched by tcpserver ?

That is, I have two handler in COPAS, one is the
writer(on 1), the other the reader(on 0). I can write
until it blocks and if the sub-process have enough to
work on(some kind of filter) would trigger my reader
on next select() ?

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