title: How do I get started with libsandbox
body: <p>I'm trying to write a simple judge that will compile and execute user submitted c files. I found  <a href="http://openjudge.net/~liuyu/Project/LibSandbox" rel="nofollow noreferrer">libsandbox</a> and a <a href="https://stackoverflow.com/questions/10861211/running-libsandbox">question</a> here on stackoverflow.</p>
  
  <p>I have installed the python module and as per the instructions I'm trying to run a hello world program written in C</p>
  
  <pre><code>➜  sandbox git:(V_0_3_x) ✗ ./hello                            
  Hello World%                                                                   
  ➜  sandbox git:(V_0_3_x) ✗ python sample2.py hello   
  result: RF
  cpu: 2ms
  mem: 288kB
  </code></pre>
  
  <p>As you can see, when I run the program in the sandbox I don't get any output. It'd be great if someone could tell me how to correctly use it.</p>