30 Dec
2021
30 Dec
'21
1:13 a.m.
what was the last Unix version
that let users make arbitrary links, such that the file system was no
longer a DAG? I recall in v6 days hearing that earlier Unix allowed
this, and that cleanup (via icheck and friends) got to be near
impossible.
From v1 on (I'm not sure about PDP-7 Unix) only
the superuser could do
that, so what you heard strikes me as urban legend. Perhaps
some
installations abused root privilege to scramble the file system, but I
certainly didn't see that happen in Research systems.
Doug