Rhino Java System Exec function

Execute a system command with this small, simple command for the Rhino JavaScript engine.

function exec(cmd) {
  var lines = [], line
  with (JavaImporter(java.lang, java.io)) {
    var proccess = Runtime.getRuntime().exec('ls -la')
    var stream = new DataInputStream(proccess.getInputStream())
    while (line = stream.readLine())
      lines.push(line)
    stream.close()   
  }
  return lines
}

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