s6

Notes

For kiss-s6-scripts look at the folder of s6-rc
Switch from contents to contents.d for bundles because skarnet deprecated it (same thing for dependencies and dependencies.d)
Apparently s6-rc-db does not do topological sorting on compiled databases when listing dependencies
/dev/fd exists on other unices and is provided under Linux for compatibility. /proc/*/fd is specific to Linux.
sysctl() the syscall is officially deprecated, but the binary sysctl is what is recommended nowadays and uses /proc/sys
No need to mount on /dev/shm as we’re symlinking it to /run/shm which is also tmpfs
/tmp is a symlink to /run/tmp which gets created on every boot (the symlink however gets created only once at the start of bootstrapping/installing the system /tmp)
The directories .ICE-unix and .X11-unix in /tmp both belong to Xorg and thus have been removed
fsck depends on sys to check for some features (and we should leave it to the initramfs?)
Consider having a virtual or a dev to bundle some services (like core, devpts, fd and shm)
We want to be initramfs agnostic, so use mountpoint to check for proc and sys (no need for devtmpfs becuase the kernel has options for automount and we can control that)
We need cgroup2 to be used as older versions rely on tmpfs on /sys/fs/cgroup