Implement sysfs #161
Description
Needed mostly for systemd, but useful for other programs as well.
Paths I've seen it access (these don't necessarily have to exist):
/sys/fs/pstore/sys/fs/bpf/sys/fs/cgroup/sys/fs/smackfs/load2/sys/kernel/security/sys/module/apparmor/parameters/enabled/sys/module/compression/sys/class/dmi/id/(something something)/sys/firmware/dmi/entries/0-0/raw/sys/hypervisor/type