title: Input string with non printable chars
body: <p>In a Linux console when a C program asks for a string (i.e. username) how can I insert non-printable chars?<br>
  I search something better then<br>
  <code>printf '\x48\x83\xc4\x50\x48\xbf\x3d...etc' | ./myProgram.bin</code><br>
  or<br>
  <code>./myProgram.bin &lt; dataFile</code><br>
  I prefer to type chars when needed but I don't know how to write non-printable ones.<br>
  Thank you</p>