in a source file named after the
subcommand and contained within <code>builtin/</code>. So it makes sense to implement your
command in <code>builtin/psuh.c</code>. Create that file, and within it, write the entry
point for your command in a function matching the style and signature:</p>
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<pre>int cmd_psuh(int argc, const char **argv, const char *prefix)</pre>
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<div class="paragraph">
<p>We&#8217;ll also need to add the declaration of psuh; 