https://elated-raman-42e0c2.netlify.app/tags/signal/Recent content in Signal on Sawyer Zheng's BlogHugozh-cnThu, 03 Mar 2022 10:21:09 +0800https://elated-raman-42e0c2.netlify.app/post/notes/python/signal/Thu, 20 May 2021 00:00:00 +0000https://elated-raman-42e0c2.netlify.app/post/notes/python/signal/<div id="outline-container-headline-1" class="outline-2"> <h2 id="headline-1"> 教程 </h2> <div id="outline-text-headline-1" class="outline-text-2"> <ul> <li><a href="https://www.jianshu.com/p/e0a69beb98bb">中文</a></li> <li><a href="https://docs.python.org/3/library/signal.html">官方</a></li> </ul> </div> </div> <div id="outline-container-headline-2" class="outline-2"> <h2 id="headline-2"> 发送信号 </h2> <div id="outline-text-headline-2" class="outline-text-2"> <div id="outline-container-headline-3" class="outline-3"> <h3 id="headline-3"> singal.pause </h3> <div id="outline-text-headline-3" class="outline-text-3"> <ul> <li> <p>暂停 <code class="verbatim">进程</code> 等待接受信号</p> <ul> <li>即，休眠进程</li> </ul> </li> </ul> </div> </div> <div id="outline-container-headline-4" class="outline-3"> <h3 id="headline-4"> signal.alarm </h3> <div id="outline-text-headline-4" class="outline-text-3"> <ul> <li> <p>计时功能</p> <ul> <li>在给定时间之后，发出 singal.SIGAlRM 信号（默认结束进程）</li> <li>多个 <code>singal.alarm</code> 覆盖前面的</li> </ul> </li> <li> <p>取值</p> <ul> <li>正值，设置计时时间</li> <li>0，取消计时</li> </ul> </li> </ul> </div> </div> </div> </div> <div id="outline-container-headline-5" class="outline-2"> <h2 id="headline-5"> 获取信号处理函数 </h2> <div id="outline-text-headline-5" class="outline-text-2"> <div id="outline-container-headline-6" class="outline-3"> <h3 id="headline-6"> signal.getsignal </h3> <div id="outline-text-headline-6" class="outline-text-3"> <div class="src src-python"> <div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span><span class="lnt">2 </span><span class="lnt">3 </span><span class="lnt">4 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-python" data-lang="python"><span class="line"><span class="cl"><span class="n">signal</span><span class="o">.</span><span class="n">getsignal</span><span class="p">(</span><span class="o">&lt;</span><span class="n">Signal</span> <span class="n">Number</span><span class="o">&gt;</span><span class="p">)</span> </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl"><span class="c1"># 例子</span> </span></span><span class="line"><span class="cl"><span class="n">singal</span><span class="o">.</span><span class="n">getsignal</span><span class="p">(</span><span class="n">singal</span><span class="o">.</span><span class="n">SIGINT</span><span class="p">)</span></span></span></code></pre></td></tr></table> </div> </div> </div> </div> </div> </div> </div> <div id="outline-container-headline-7" class="outline-2"> <h2 id="headline-7"> 设置信号处理函数 </h2> <div id="outline-text-headline-7" class="outline-text-2"> <div id="outline-container-headline-8" class="outline-3"> <h3 id="headline-8"> <code>signal.singal</code> </h3> <div id="outline-text-headline-8" class="outline-text-3"> <div class="src src-python"> <div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-python" data-lang="python"><span class="line"><span class="cl"><span class="n">Signal</span><span class="o">.</span><span class="n">singal</span><span class="p">(</span><span class="o">&lt;</span><span class="n">signal</span> <span class="n">number</span><span class="o">&gt;</span><span class="p">,</span> <span class="o">&lt;</span><span class="n">handler</span> <span class="n">function</span><span class="o">&gt;</span><span class="p">)</span></span></span></code></pre></td></tr></table> </div> </div> </div> <div id="outline-container-headline-9" class="outline-4"> <h4 id="headline-9"> 处理函数的取值 </h4> <div id="outline-text-headline-9" class="outline-text-4"> <ul> <li> <p>函数签名如： <code>handler(signum, frame)</code> 的函数</p>