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Comment by oblio | Hacker News Reader

Turns out, stuff like Java's SecurityManager:https://docs.oracle.com/javase/7/docs/api/java/lang/Security... were there for a reason.

Note, it's been around since JDK 1.0, so 1996, 28 years ago (!), though it's not widely used.

But it allows sandboxing of libraries you use. I was using it to make a faulty library that was calling System.exit(0) - yes, a library that was shutting down the entire process, closing the main app... - not do that and instead wrap the exit in a regular exception.

Python and especially Javascript are reinventing a lot of "enterprise" ideas that Java invented 20+ years ago. Maven groupIds are another example from the Java ecosystem (they're used to avoid top level package name squatting).

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You are of course correct that those features are extremely useful and that the JDK authors foresaw these situations long before they were a big deal. But also you do note that it's not widely used which is also correct and that's the important bit. I think it would be more accurate to say that python and javascript are discovering (perhaps not fully intentionally) ways to implement these ideas that are suitable for mass community adoption.

IMHO it's like the difference between basic research (mostly not very useful on its own but extremely important) and public health in medicine (the thing that actually makes a massive impact on the world that leverages the former but at a slower and more controlled pace). To stretch the analogy even more any doctor worth their salt will tell you that a treatment plan is only as good as the likelihood that the patient will stick to it. Other things like let's encrypt (https everywhere) and signal/whatsapp/telegram (strong privacy enabled by default) come to mind as implementing ideas on things that experts had been handwringing for decades that people "should" be doing that are now done so well that it feels almost silly not to do them the good way.

Python had some sandboxing attempts long time ago, like 20 years if not more, but without much success. Zope - one of the first web frameworks - needed one, but if I remember correctly it broke around Python 2.5, so you had to use Zope with an old version of Python.

https://wiki.python.org/moin/SandboxedPython has some details

The Java Security Manager was not very effective in practice. It was already deprecated in Java 17 and will be removed in the future: https://openjdk.org/jeps/411

I understand their reasoning but it's still kind of sad that there's no replacement planned.

It would be cool if there was a universal access control platform, but I guess the best we're getting is Docker, because such a platform would commoditize OSes, which OS creators for sure don't want :-(

From an organizational standpoint its better because it lets a sysadmin/security person sandbox anything and everything instead of having to become proficient with the tooling for every different language (which may not even exist).

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