this post was submitted on 27 Jul 2023
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Malicious Compliance
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iOS doesn’t have any Linux.
FreeBSD is not Linux. Linux is a kernel and Apple uses Mach, a different kernel. They do both share that they’re POSIX, but OS X is actual, factual, UNIX, and Linux has never paid the money to qualify.
My bad I'm conflating bash and Unix. From my end both apple and Linux use bash so they have the same underlying base...but I realize that's not accurate, and even unix and bash are not synonomous.
How different is the FreeBSD kernel from the Linux kernel?
Like in terms of interfaces, if I were to port a device driver, am I just changing some header files and some constants/enums/ifdefs?
Or there’s like entirely different function signatures / APIs?
I would look at the source of LinuxKPI to get an idea of how different they are.
Well of course I could go look at the source code. We had to write a hello world Linux module in college. Was just being lazy and thought some expert might give a quick synopsis.
Though based on your reply, I’m guessing they are more different than I imagined.