></span><code><span class="nv">Upon</span> <span class="nv">successful</span> <span class="nv">completion</span>, <span class="nv">these</span> <span class="nv">functions</span> <span class="nv">shall</span> <span class="k">return</span> <span class="mi">0</span>. <span class="nv">Otherwise</span>,
<span class="nv">these</span> <span class="nv">functions</span> <span class="nv">shall</span> <span class="k">return</span> <span class="o">-</span><span class="mi">1</span> <span class="nv">and</span> <span clas