That's a bit light on the details, and I can't make any sense of "To use stdio even you literally need kernel-level privileges on Console.", C's stdio doesn't require special privileges to use, nor does Crystal's, afaik.

Maybe someone else will know that means.

I think Console is as in XBox or PlayStation, not as in the kind of application.

Ah, the use of Germanic uppercased nouns in English sent me the wrong way. Thanks.

More poignant examples would be `dirent.h` and `system`. Getting access to the file system on a console, or the ability to start up a process out of band is not allowed.