Subj : Re: linux permissions issue
To   : tenser
From : scarface
Date : Tue Sep 02 2025 08:42:28

 te> Plan 9 did away with it entirely.  There, a "host owner" is just a normal
 te> user who has access to the hardware resources of a given host, but
 te> that's it: host owners can't bypass file permissions.  If I log into a
 te> terminal, for example, then I "own" that machine.  Per-process file
 te> namespaces are sort of like capabilities (I had a long discussion with
 te> Ben Laurie about this at one point, and we agreed they were more or
 te> less isomorphic to e.g. Capsicum-style capabilities), so you can
 te> easily fence off what a program like a web browser sees and has access
 te> to.  It was a nice system; shame it never really caught on.  Some of the
 te> good ideas made it into Linux, but are poor imitations of the original.

It's really sad that plan 9 never really took off. If someone were to start again, what feature(s) from plan 9 do you think would be essential to copy?

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