title: What is the reading limit of function 'read' in 'unistd.h'?
body: <p>Standard unix C has this function:</p>
  
  <pre><code>ssize_t read(int fd, void *buf, size_t count);
  </code></pre>
  
  <p>But what is the maximum bytes that this 'read' function can read 1 time?</p>