(double)(end - start) / CLOCKS_PER_SEC * 1000,
To be even cooler, try the Plan 9-like approach using the Eshell
，这一点在safew官方版本下载中也有详细论述
if not existed:
Before we get into the code, we need to understand why this was always going to end in a bloodbath. The entire history of DRM is, at its core, a history of trying to give someone a locked box while simultaneously handing them the fucking key. The film and music industries have been losing this battle since the first CSS-encrypted DVD was cracked in 1999.