 let _fflush = fflush
 let _getpid = getpid
 let _close = close
+let _mkdir = mkdir
+let _read = read
 
 public class PosixSys {
 

    return open(dirPath, flags: O_RDONLY | O_DIRECTORY, mode: 0)
  }

  public func close(fd: Int32) -> Int32 {
    return retry({ _close(fd) })
  }

    return value
  }

  public func retry(fn: () -> Int) -> Int {
    var value = fn()
    while value == -1 {
      if (errno != EINTR) { break }
      value = fn()
    }
    return value
  }

}

let Sys = PosixSys()
