alt Hacker NewsIn light of https://www.phoronix.com/news/Linux-Drops-AppleTalk , I'm a big fan of replacing the functionality in userspace:) (I've similarly thought that it would be helpful to port as many of Linux's filesystems to FUSE so when they get dropped users can just switch to that)
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nxobject • yesterday at 3:13 PM
FUSE is great for portability, too – with some work you get macOS, Haiku, the BSDs...
Fwiw, if performance isn't paramount, you can have a lot of fun with LKL (linux kernel library) and UML (user mode Linux).
UML is full Linux running as a userspace process. Tools like guestfish use it to modify disk images. UML can only run on Linux though.
LKL lets you use the linux kernel as a library. However, only single threaded. But this allows you to use linux's tcp stack from userspace, or its filesystems, etc. LKL also works on non Linux platforms.
These are definitely a different shape than what you're looking for, but they could help you keep the real linux implementations alive from userspace far into the future.