keyboard-function-keys-linux VS linux

but possibly this github repo keychron-k2-function-keys-linux might be of some help? also saw this semi-official looking repo on gitlab; it mentioned ubuntu but since its basically just something with a modprobe config file, it might work on fedora too. possibly variations on the same solution here and here and here

You have to execute it each time the system boots. I am using a systemd script (look here for instructions). You can probably figure out how to modify it so it works for you. Good luck! :)

Keychron has no software, it do have a bug that the function row will stop working and act like you are holding down fn key, it can be fixed with a simple service file see this link (GitHub File)

I have the K8. I always use the Windows mode, whether connected via wire or Bluetooth. I set that fnmode pseudo file to 0, and I used systemctl to make the value stick after each boot, as described here: https://github.com/adam-savard/keychron-k2-function-keys-linux .

One example https://github.com/adam-savard/keychron-k2-function-keys-linux

>A pidfd does not let you hold a reference to an individual thread, only to a process

I think that's outdated: https://github.com/torvalds/linux/commit/64bef697d33b75fc06c...

For specific cases I can find ext4 explicitly checking for RO https://github.com/torvalds/linux/blob/8c06da67d0bd3139a97f3...

FFS predates FreeBSD and is in some capacity supported by all 3 major BSDs. I'm fairly confident that Linux actually supports it through the ufs driver ( https://github.com/torvalds/linux/tree/master/fs/ufs ); whether the use of different names in different places makes it better or worse is an exercise for the reader.

These are a bit easier to see what's going on:

https://github.com/torvalds/linux/commit/d5cf50dafc9dd5faa1e...

https://github.com/torvalds/linux/blob/d5cf50dafc9dd5faa1e61...

Unfortunately Github doesn't have a way to render symbols for whitespace, but you can tell by selecting the spaces that the previous version had leading tabs. Linus changed it so that the tokens `default` and the number e.g. `12` are also separated by a tab. This is tricky, because the token "default" is seven characters, it will always give this added tab a width of 1 char which makes it always layout the same as if it were a space no matter if you use tab widths of 1, 2, 4, or 8.

There was also a Gentoo effort to run atop FreeBSD[0]. The challenge of course is that afaik none of the BSD kernel ABIs are considered stable. The stable interface is the BSD libc. That said, with binfmt_misc, I don't see a reason you couldn't just run (at least some) FreeBSD binaries on Linux with a thin syscall translation layer (rather something like qemu-system) and then your layer hooked via binfmt_misc. I'm not aware of anyone who has done this for FreeBSD, but prior efforts existed as alternate binfmts for SysVr4/5 ELF binaries[2]. Either way would take some elbow grease, but you *might* even be able just reuse binfmt_elf and just have a new interpreter for FreeBSD elf.

[0] https://wiki.gentoo.org/wiki/Gentoo_FreeBSD

[1] https://docs.kernel.org/admin-guide/binfmt-misc.html

[2] https://github.com/torvalds/linux/blob/master/fs/binfmt_elf....