title: int filedes? system calls read and write
body: <p>Can any of you guys tell me what "int filedes" refers to?
  <a href="http://pubs.opengroup.org/onlinepubs/9699919799/functions/read.html" rel="nofollow">http://pubs.opengroup.org/onlinepubs/9699919799/functions/read.html</a></p>
  
  <p>I've noticed I can put any int in there and it seems to work but I don't know what it's for...</p>
  
  <p>Thanks.</p>