Re: semi-privileged mode

2015-06-04 Thread Rick Troth
On 06/04/2015 08:42 AM, David Boyes wrote: >> > (recall the initial UNIX model had ri= ngs of privileges or was that just >> > Dante and the Seven levels of hell?) > No, that was MULTICS. UNIX V6 and earlier always only had 1 privilege flag > (superuser/general user) due to hardware I/D protectio

semi-privileged mode

2015-06-04 Thread David Boyes
> (recall the initial UNIX model had ri= ngs of privileges or was that just > Dante and the Seven levels of hell?) No, that was MULTICS. UNIX V6 and earlier always only had 1 privilege flag (superuser/general user) due to hardware I/D protection limitations on early model PDPs (pre-11), and we'