Tom Lane <t...@sss.pgh.pa.us> wrote:
 
>   If the O_NONBLOCK flag is clear, a write request may cause the
>   thread to block, but on normal completion it shall return
>   nbyte.
> 
> Note the last in particular.  Short writes are specifically
> disallowed on pipes.
 
OK, that's pretty definitive.  I yield the point.
 
-Kevin

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