Comment by AdieuToLogic
7 days ago
> BSD jails are architected wholly differently from what something like Docker provides. > Jails are first-class citizens that are baked deep into the system.
Both very true statements and worth remembering when considering:
> Additionally, iirc, the logic for FreeBSD jails never made it into the Darwin kernel.
You are quite correct, as Darwin is is based on XNU[0], which itself has roots in the Mach[1] microkernel. Since XNU[0] is an entirely different OS architecture than that of FreeBSD[3], jails[4] do not exist within it.
The XNU source can be found here[2].
0 - https://en.wikipedia.org/wiki/XNU
1 - https://en.wikipedia.org/wiki/Mach_(kernel)
2 - https://github.com/apple-oss-distributions/xnu
3 - https://cgit.freebsd.org/src/
4 - https://man.freebsd.org/cgi/man.cgi?query=jail&apropos=0&sek...
Thank you for the links I will take a closer look at XNU. It’s neat to see how these projects influence each other.
> Thank you for the links I will take a closer look at XNU.
Another great resource regarding XNU and OS-X (although a bit dated now) is the book:
0 - https://openlibrary.org/books/OL27440934M/Mac_OS_X_Internals
This is great! Thank you!