From: wb@freebie.xs4all.nl (Wilko Bulte)
Subject: [TUHS] Early UNIX file permission oddity
Date: Wed, 21 May 2008 08:15:15 +0200 [thread overview]
Message-ID: <20080521061515.GA73871@freebie.xs4all.nl> (raw)
In-Reply-To: <20080521043224.GA32712@minnie.tuhs.org>
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
next prev parent reply other threads:[~2008-05-21 6:15 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-21 4:32 Warren Toomey
2008-05-21 6:15 ` Wilko Bulte [this message]
2008-05-21 11:08 ` John Cowan
2008-05-21 11:20 ` Warren Toomey
2008-05-21 11:50 ` John Cowan
2008-05-21 21:39 ` Tim Newsham
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