eAsync(PGconn *conn,
                   char *buffer,
                   int bufsize);
</pre><p>
      </p><p>
       This function is similar to <a class="xref" href="libpq-copy.html#LIBPQ-PQGETLINE"><code class="function">PQgetline</code></a>, but it can be used
       by applications
       that must read <code class="command">COPY</code> data asynchronously, that is, without blocking.
       Having issued the <code class="command">COPY</code> command and gotten a <code class="literal">PGRES_COPY_OUT</co