21 May
2008
21 May
'08
12:15 p.m.
Quoting Warren Toomey, who wrote on Wed, May 21, 2008 at 02:32:24PM +1000 ..
I was just browsing through the 1974 UNIX CACM paper,
the one that first
publicly described the design and functionality of UNIX. I came across
some sentences which describe the file permissions, and they sounded quite odd:
When a file is created, it is marked with the user ID of its owner.
Also given for new files is a set of seven protection bits.
Six of these specify independently read, write, and execute permission
for the owner of the file and for all other users. [The seventh bit
is the set-user-id bit. ]
This seems to indicate that there are "rwx" bits for owner, "rwx"
bits for other,
and no "rwx" bits for group. I've never seen a UNIX system with 6 file
permission bits, so I thought I would poke around to see what I could find. It
Well, I have a UNIX-like system sitting in my basement that has this. This
is a TSC Uniflex system running on a Motorola MC6809 CPU. 8 bit CPU in
other words.
..
Wilko