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sahinakkaya 2023-01-16 17:58:57 +00:00
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2023/01/15/hot-reloading-with-trap-and-kill.html
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@ -447,7 +447,7 @@ Hello from ./script2. i is 3
<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c">#!/bin/bash</span>
<span class="nb">echo</span> <span class="s2">"My pid is </span><span class="nv">$$</span><span class="s2">. You know what to do ( ͡° ͜ʖ ͡°)"</span>
<span class="nb">echo</span> <span class="s2">"You can also send me signal with 'killall </span><span class="sb">`</span><span class="nb">basename</span> <span class="nv">$0</span><span class="sb">`</span><span class="s2"> ...'"</span>
<span class="nb">echo</span> <span class="s2">"You can also kill me with 'kill -s INT </span><span class="se">\`</span><span class="s2">pgrep </span><span class="sb">`</span><span class="nb">basename</span> <span class="nv">$0</span><span class="sb">`</span><span class="se">\`</span><span class="s2">'"</span>
<span class="nv">pids</span><span class="o">=()</span> <span class="c"># we will store the pid's of child scripts here</span>
<span class="nv">scripts_to_be_executed</span><span class="o">=(</span><span class="s2">"./script1"</span> <span class="s2">"./script2"</span><span class="o">)</span>
@ -500,7 +500,7 @@ restart_scripts
<p>Here is an example run:</p>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>❯ ./trap_multiple
My pid is 3124123. You know what to do ( ͡° ͜ʖ ͡°)
You can also send me signal with 'killall trap_multiple ...'
You can also kill me with 'kill -s INT `pgrep trap_multiple`'
Hello from ./script1. i is 1
Hello from ./script2. i is 1
Hello from ./script2. i is 2

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assets/js/lunr/lunr-store.js
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feed.xml
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@ -1,4 +1,4 @@
<?xml version="1.0" encoding="utf-8"?><feed xmlns="http://www.w3.org/2005/Atom" ><generator uri="https://jekyllrb.com/" version="4.2.1">Jekyll</generator><link href="https://sahinakkaya.dev/feed.xml" rel="self" type="application/atom+xml" /><link href="https://sahinakkaya.dev/" rel="alternate" type="text/html" /><updated>2023-01-16T15:57:30+00:00</updated><id>https://sahinakkaya.dev/feed.xml</id><title type="html">Şahin Akkaya’s Personal Page</title><subtitle>Şahin Akkaya's personal blog - a perfectionist who likes to tinker everything until it is just right. Get ready to find some sweet tips that will boost your productivity and make you fall in love with your computer.</subtitle><author><name>Şahin Akkaya</name></author><entry><title type="html">Hot-Reload Long Running Shell Scripts (feat. trap / kill)</title><link href="https://sahinakkaya.dev/2023/01/15/hot-reloading-with-trap-and-kill.html" rel="alternate" type="text/html" title="Hot-Reload Long Running Shell Scripts (feat. trap / kill)" /><published>2023-01-15T21:48:08+00:00</published><updated>2023-01-15T21:48:08+00:00</updated><id>https://sahinakkaya.dev/2023/01/15/hot-reloading-with-trap-and-kill</id><content type="html" xml:base="https://sahinakkaya.dev/2023/01/15/hot-reloading-with-trap-and-kill.html">&lt;h2 id=&quot;trap-them-and-kill-them&quot;&gt;&lt;code class=&quot;language-plaintext highlighter-rouge&quot;&gt;trap&lt;/code&gt; them and &lt;code class=&quot;language-plaintext highlighter-rouge&quot;&gt;kill&lt;/code&gt; them!&lt;/h2&gt;
<?xml version="1.0" encoding="utf-8"?><feed xmlns="http://www.w3.org/2005/Atom" ><generator uri="https://jekyllrb.com/" version="4.2.1">Jekyll</generator><link href="https://sahinakkaya.dev/feed.xml" rel="self" type="application/atom+xml" /><link href="https://sahinakkaya.dev/" rel="alternate" type="text/html" /><updated>2023-01-16T17:58:56+00:00</updated><id>https://sahinakkaya.dev/feed.xml</id><title type="html">Şahin Akkaya’s Personal Page</title><subtitle>Şahin Akkaya's personal blog - a perfectionist who likes to tinker everything until it is just right. Get ready to find some sweet tips that will boost your productivity and make you fall in love with your computer.</subtitle><author><name>Şahin Akkaya</name></author><entry><title type="html">Hot-Reload Long Running Shell Scripts (feat. trap / kill)</title><link href="https://sahinakkaya.dev/2023/01/15/hot-reloading-with-trap-and-kill.html" rel="alternate" type="text/html" title="Hot-Reload Long Running Shell Scripts (feat. trap / kill)" /><published>2023-01-15T21:48:08+00:00</published><updated>2023-01-15T21:48:08+00:00</updated><id>https://sahinakkaya.dev/2023/01/15/hot-reloading-with-trap-and-kill</id><content type="html" xml:base="https://sahinakkaya.dev/2023/01/15/hot-reloading-with-trap-and-kill.html">&lt;h2 id=&quot;trap-them-and-kill-them&quot;&gt;&lt;code class=&quot;language-plaintext highlighter-rouge&quot;&gt;trap&lt;/code&gt; them and &lt;code class=&quot;language-plaintext highlighter-rouge&quot;&gt;kill&lt;/code&gt; them!&lt;/h2&gt;
&lt;p&gt;There is a beautiful command in Linux called &lt;a href=&quot;https://man7.org/linux/man-pages/man1/trap.1p.html&quot;&gt;&lt;code class=&quot;language-plaintext highlighter-rouge&quot;&gt;trap&lt;/code&gt;&lt;/a&gt; which &lt;em&gt;trap&lt;/em&gt;s signals and let you run specific commands when they invoked. There is also good ol’ &lt;a href=&quot;https://man7.org/linux/man-pages/man1/kill.1.html&quot;&gt;&lt;code class=&quot;language-plaintext highlighter-rouge&quot;&gt;kill&lt;/code&gt;&lt;/a&gt; command which not only kills processes but allows you to specify a signal to send. By combining these two, you can run specific functions from your scripts any time!&lt;/p&gt;
&lt;h3 id=&quot;basic-example&quot;&gt;Basic Example&lt;/h3&gt;
@ -126,7 +126,7 @@ Hello from ./script2. i is 3
&lt;div class=&quot;language-bash highlighter-rouge&quot;&gt;&lt;div class=&quot;highlight&quot;&gt;&lt;pre class=&quot;highlight&quot;&gt;&lt;code&gt;&lt;span class=&quot;c&quot;&gt;#!/bin/bash&lt;/span&gt;
&lt;span class=&quot;nb&quot;&gt;echo&lt;/span&gt; &lt;span class=&quot;s2&quot;&gt;&quot;My pid is &lt;/span&gt;&lt;span class=&quot;nv&quot;&gt;$$&lt;/span&gt;&lt;span class=&quot;s2&quot;&gt;. You know what to do ( ͡° ͜ʖ ͡°)&quot;&lt;/span&gt;
&lt;span class=&quot;nb&quot;&gt;echo&lt;/span&gt; &lt;span class=&quot;s2&quot;&gt;&quot;You can also send me signal with 'killall &lt;/span&gt;&lt;span class=&quot;sb&quot;&gt;`&lt;/span&gt;&lt;span class=&quot;nb&quot;&gt;basename&lt;/span&gt; &lt;span class=&quot;nv&quot;&gt;$0&lt;/span&gt;&lt;span class=&quot;sb&quot;&gt;`&lt;/span&gt;&lt;span class=&quot;s2&quot;&gt; ...'&quot;&lt;/span&gt;
&lt;span class=&quot;nb&quot;&gt;echo&lt;/span&gt; &lt;span class=&quot;s2&quot;&gt;&quot;You can also kill me with 'kill -s INT &lt;/span&gt;&lt;span class=&quot;se&quot;&gt;\`&lt;/span&gt;&lt;span class=&quot;s2&quot;&gt;pgrep &lt;/span&gt;&lt;span class=&quot;sb&quot;&gt;`&lt;/span&gt;&lt;span class=&quot;nb&quot;&gt;basename&lt;/span&gt; &lt;span class=&quot;nv&quot;&gt;$0&lt;/span&gt;&lt;span class=&quot;sb&quot;&gt;`&lt;/span&gt;&lt;span class=&quot;se&quot;&gt;\`&lt;/span&gt;&lt;span class=&quot;s2&quot;&gt;'&quot;&lt;/span&gt;
&lt;span class=&quot;nv&quot;&gt;pids&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;=()&lt;/span&gt; &lt;span class=&quot;c&quot;&gt;# we will store the pid's of child scripts here&lt;/span&gt;
&lt;span class=&quot;nv&quot;&gt;scripts_to_be_executed&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;=(&lt;/span&gt;&lt;span class=&quot;s2&quot;&gt;&quot;./script1&quot;&lt;/span&gt; &lt;span class=&quot;s2&quot;&gt;&quot;./script2&quot;&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;)&lt;/span&gt;
@ -179,7 +179,7 @@ restart_scripts
&lt;p&gt;Here is an example run:&lt;/p&gt;
&lt;div class=&quot;language-plaintext highlighter-rouge&quot;&gt;&lt;div class=&quot;highlight&quot;&gt;&lt;pre class=&quot;highlight&quot;&gt;&lt;code&gt;❯ ./trap_multiple
My pid is 3124123. You know what to do ( ͡° ͜ʖ ͡°)
You can also send me signal with 'killall trap_multiple ...'
You can also kill me with 'kill -s INT `pgrep trap_multiple`'
Hello from ./script1. i is 1
Hello from ./script2. i is 1
Hello from ./script2. i is 2

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sitemap.xml
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@ -55,6 +55,6 @@
</url>
<url>
<loc>https://sahinakkaya.dev/assets/docs/resume.pdf</loc>
<lastmod>2023-01-16T15:57:23+00:00</lastmod>
<lastmod>2023-01-16T17:58:49+00:00</lastmod>
</url>
</urlset>