KusaReMKN

<h1 id="bsd-%E3%81%AE-err(3)-%E3%81%AF%E8%87%AA%E5%88%86%E3%81%AE%E3%83%97%E3%83%AD%E3%82%B0%E3%83%A9%E3%83%A0%E5%90%8D%E3%82%92%E3%81%A9%E3%81%93%E3%81%8B%E3%82%89%E5%8F%96%E5%BE%97%E3%81%99%E3%82%8B%E3%81%AE%E3%81%8B">
<a class="header-anchor-link" href="#bsd-%E3%81%AE-err(3)-%E3%81%AF%E8%87%AA%E5%88%86%E3%81%AE%E3%83%97%E3%83%AD%E3%82%B0%E3%83%A9%E3%83%A0%E5%90%8D%E3%82%92%E3%81%A9%E3%81%93%E3%81%8B%E3%82%89%E5%8F%96%E5%BE%97%E3%81%99%E3%82%8B%E3%81%AE%E3%81%8B" aria-hidden="true"></a> BSD の err(3) は自分のプログラム名をどこから取得するのか</h1>
<p>決して気持ちの良い方法ではない。</p>
<div class="code-block-container"><pre class="language-c"><code class="language-c"><span class="token keyword">extern</span> <span class="token keyword">char</span> <span class="token operator">*</span>__progname<span class="token punctuation">;</span>		<span class="token comment">/* Program name, from crt0. */</span>
</code></pre></div><p><span class="embed-block zenn-embedded zenn-embedded-card"><iframe id="zenn-embedded__fa83d5a98a9f7" src="https://embed.zenn.studio/card#zenn-embedded__fa83d5a98a9f7" data-content="https%3A%2F%2Fminnie.tuhs.org%2Fcgi-bin%2Futree.pl%3Ffile%3D4.4BSD%2Fusr%2Fsrc%2Flib%2Flibc%2Fgen%2Ferr.c" frameborder="0" scrolling="no" loading="lazy"></iframe></span><a href="https://minnie.tuhs.org/cgi-bin/utree.pl?file=4.4BSD/usr/src/lib/libc/gen/err.c" style="display:none" target="_blank" rel="nofollow noopener noreferrer">https://minnie.tuhs.org/cgi-bin/utree.pl?file=4.4BSD/usr/src/lib/libc/gen/err.c</a></p>
