OSX Command Line Read StdIn

func readStdIn() -> String {
        let stdIn = NSFileHandle.fileHandleWithStandardInput()
        let inputData = stdIn.availableData
        let string = NSString(data: inputData, encoding: NSUTF8StringEncoding)!
        return string.stringByTrimmingCharactersInSet(NSCharacterSet.newlineCharacterSet())
    }