[dun44]

Ptrace could an equivalent of what /proc was originally supposed to be, before it got repurposed for a bunch of sysctl-like purposes.

[Retr0id]

Interesting. I didn't know much about /proc's original design intent, and Wikipedia indeed says "the design of procfs aimed to replace the ptrace system call used for process tracing", citing https://lucasvr.gobolinux.org/etc/Killian84-Procfs-USENIX.pd... ("Processes as Files", USENIX 1984)