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That link is really interesting! Thanks for that. I should have probably said procfs is Linux-specific. Anyway, learned (rather unlearned) something new today.

Also interesting is that early Unix systems (before v8) used `ptrace()` for gathering process information - the same system call programs like strace/ltrace use today.

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No, procfs is also not Linux specific ;-) /proc is a filesystem, so most of us refer to it as 'procfs' for short. In fact, the header file you include a C program in Solaris to use it is '<procfs.h>'.

As I said before, the only thing that's really Linux-specific is Linux chose to represent it as text instead of something machine-parsable.

Which other OS uses procfs?

Hier is the history https://en.wikipedia.org/wiki/Procfs I think the one from linux was inspire by plan9's implementation.

Thank you!

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