title: NAME_MAX is not 255 in my case
body: <p>When I've tested in Centos on Docker(centos:latest), it was not 255.</p>
  
  <pre><code># getconf NAME_MAX /
  242
  </code></pre>
  
  <p>But it's defined in <code>limits.h</code> correctly</p>
  
  <pre><code># cat /usr/include/linux/limits.h | grep NAME_MAX
  #define NAME_MAX         255    /* # chars in a file name */
  </code></pre>
  
  <p>What is problem with me and what should check more?</p>