atch.
</p>
<p>For reasons of efficiency, this procedure by-passes the port&rsquo;s output
buffer (if any) and sends the output to the underlying file descriptor
directly.  This means that it is most convenient for use with
unbuffered ports.  However, this procedure can be used with a port
with buffered output, but if that is done and the port has previously
been used for output by a procedure other than c-write or an
await-glib-put* procedure, then it should be flushed before this
procedure is called.  Such