18 Mar
2016
18 Mar
'16
11:11 a.m.
On Thu, Mar 17, 2016 at 11:59:36PM -0400, John Cowan wrote:
There was also no concept of pathnames in PDP-7 Unix,
neither relative
nor absolute. ...
directory, conventionally named "bin", and the shell could not execute
commands out of a directory that did not contain a "bin" link.
Are you sure it was called "bin"? The PDP-7 team are working on the
assumption that it was called "system" because init links the shell
from "system" into a user's home directory:
sys setuid " Set the user's user-id,
sys chdir; dd " change into the "dd" directory
sys chdir; dir " and then into the user's directory
...
sys link; system; sh; sh " Link sh in system dir to this dir
system:
...
<sy>;<st>;<em>; 040040
https://github.com/DoctorWkt/pdp7-unix/blob/master/src/cmd/init.s
There's no mention of the directory's name in the kernel, but i-node 3
has to contain init (we assume "system" again) and i-node 4 is the
directory that holds users' home directories ("dd").
Cheers, Warren