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blog/2024/02/16/containers-101---chroot-part-i.html

@@ -1312,7 +1312,7 @@ <h1 id="containers-101-chroot-part-i">Containers 101 - chroot (Part I)<a class="
 <p>Providing just the command is apparently not enough. To debug the execution the
 command <a href="https://manpages.debian.org/strace.1.en.html" target="_blank">strace(1)</a>
 can be used. This commands provides a trace of system calls.</p>
-<div class="language-console highlight"><pre><span></span><code><span id="__span-2-1"><a id="__codelineno-2-1" name="__codelineno-2-1" href="#__codelineno-2-1"></a><span class="gp">$ </span>sudo<span class="w"> </span>chroot<span class="w"> </span>target
+<div class="language-console highlight"><pre><span></span><code><span id="__span-2-1"><a id="__codelineno-2-1" name="__codelineno-2-1" href="#__codelineno-2-1"></a><span class="gp">$ </span>sudo<span class="w"> </span>strace<span class="w"> </span>chroot<span class="w"> </span>target
 </span><span id="__span-2-2"><a id="__codelineno-2-2" name="__codelineno-2-2" href="#__codelineno-2-2"></a><span class="go">...</span>
 </span><span id="__span-2-3"><a id="__codelineno-2-3" name="__codelineno-2-3" href="#__codelineno-2-3"></a><span class="go">chroot(&quot;target&quot;)                        = 0</span>
 </span><span id="__span-2-4"><a id="__codelineno-2-4" name="__codelineno-2-4" href="#__codelineno-2-4"></a><span class="go">chdir(&quot;/&quot;)                              = 0</span>
@@ -1374,12 +1374,12 @@ <h1 id="containers-101-chroot-part-i">Containers 101 - chroot (Part I)<a class="
 </div>
 <p>In the static executable the function <code>puts</code> is present and can be called by
 existing address:</p>
-<div class="language-console highlight"><pre><span></span><code><span id="__span-7-1"><a id="__codelineno-7-1" name="__codelineno-7-1" href="#__codelineno-7-1"></a><span class="go">nm app | grep &quot; puts&quot;</span>
+<div class="language-console highlight"><pre><span></span><code><span id="__span-7-1"><a id="__codelineno-7-1" name="__codelineno-7-1" href="#__codelineno-7-1"></a><span class="gp">$ </span>nm<span class="w"> </span>app<span class="w"> </span><span class="p">|</span><span class="w"> </span>grep<span class="w"> </span><span class="s2">&quot; puts&quot;</span>
 </span><span id="__span-7-2"><a id="__codelineno-7-2" name="__codelineno-7-2" href="#__codelineno-7-2"></a><span class="go">000000000040c180 W puts</span>
 </span></code></pre></div>
 <p>When omitting the option <code>-static</code> the function <code>puts</code> is not part of the
 executable:</p>
-<div class="language-console highlight"><pre><span></span><code><span id="__span-8-1"><a id="__codelineno-8-1" name="__codelineno-8-1" href="#__codelineno-8-1"></a><span class="go">nm app | grep &quot; puts&quot;</span>
+<div class="language-console highlight"><pre><span></span><code><span id="__span-8-1"><a id="__codelineno-8-1" name="__codelineno-8-1" href="#__codelineno-8-1"></a><span class="gp">$ </span>nm<span class="w"> </span>app<span class="w"> </span><span class="p">|</span><span class="w"> </span>grep<span class="w"> </span><span class="s2">&quot; puts&quot;</span>
 </span><span id="__span-8-2"><a id="__codelineno-8-2" name="__codelineno-8-2" href="#__codelineno-8-2"></a><span class="go">                 U puts@GLIBC_2.2.5</span>
 </span></code></pre></div>
 <p>Since all executable programs share the same standard libraries memory can be

feed_json_updated.json

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             "image": null,
-            "date_modified": "2024-02-16T10:45:46+00:00",
+            "date_modified": "2024-02-16T16:09:47+00:00",
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@@ -43,7 +43,7 @@ mechanisms behind the scenes. Before modern concepts like cgroups etc. are
 described, the main idea behind bundling an execution environment is introduced
 by using a chroot environment.&lt;/p&gt;</description>
       <link>https://dreknix.github.io/wiki/blog/2024/02/16/containers-101---chroot-part-i.html</link>
-      <pubDate>Fri, 16 Feb 2024 10:45:46 +0000</pubDate>
+      <pubDate>Fri, 16 Feb 2024 16:09:47 +0000</pubDate>
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