It's only regarded as design failure by the linux folks. Maybe because it came from Microsoft, NIH syndrome.

A global constraint handler is still by far better than dynamic env handlers, and most of the existing libc/POSIX design failures.

You can disable this global constraint handler btw.

> Maybe because it came from Microsoft, NIH syndrome.

No it is because you still need to get the size calculation correct, so it doesn't actually have any benefit over the strn... family other than being different.

Also a memcpy that can fail at runtime, seems to be only complicating things. If anything it should fail at compile time.