title: Converting string to key_t
body: <p>How is it possible to convert a string to a <code>key_t</code>, in order to use it for creating a shared memory segment by using <code>shmget</code>?</p>
  
  <p>This is because the key for mapping the shared memory is being transmitted over TCP/IP.</p>
  
  <p>Thanks in advance!</p>