Research 9th and 10th had a /cs pretty much identical to Plan 9's /net. I doubt with any of that user-level control, though. IIRC Research's fmount(2) would'v

Research 9th and 10th had a /cs pretty much identical to Plan 9's /net. I doubt with any of that user-level control, though. IIRC Research's fmount(2) would've allowed people to run their own (unrestricted) copy of tcpmgr and mount it on by themselves.