<p></p>
<p>Unfortunately I found code snippets like this:</p>
<pre><code>static int child_init(int rank)
{
        int i, j;
        int len;
        xhttp_rpc_mod_cmds_t *cmds;
        /* rpc_export_t *rpc_e; */

        if(rank==PROC_MAIN || rank==PROC_TCP_MAIN)
                return 0; /* do nothing for the main process */
</code></pre>
<p>So some modules are "aware" of which ranks refer to the main process.</p>

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