[TUHS] Who's behind the UNIX filesystem permission

Noel Chiappa jnc at mercury.lcs.mit.edu
Fri Aug 2 09:43:51 AEST 2019

    > From: Dave Horsfall

    > it actually *unlinked* directories

Maybe the application was written by a LISP programmer? :-)

(Not really, of course; it was probably just someone who didn't know much
about Unix. They had a list of system calls, and 'unlink' probably said ' only
works on directories when the caller is root', so...)

Speaking of LISP and GC, it's impressive how GC is not really a big issue any
more. At one point people were even building special CPUs that had hardware
support for GC; now it seems to be a 'solved problem' on ordinary CPUs.


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