ich can be invoked
by &rsquo;proc&rsquo; to cause the procedure to return before end-of-file is
reached.  Behavior is identical to await-geteveryblock! if the
continuation is not invoked.
</p>
<p>This procedure will start a read watch on &rsquo;port&rsquo; for blocks of data,
such as binary records, of size &rsquo;size&rsquo;.  It calls &rsquo;await&rsquo; while
waiting for input and will apply &rsquo;proc&rsquo; to any block of data received.
&rsquo;proc&rsquo; should be a procedure taking three arguments,