Drat, the origin of SysIII init remains obscure...it's not in PWB 1, now not in USG
Issue 2...so either PWB2, USG Issue 3 (or later) or UNIX/TS.....or maybe it's an
older CB variant...anywho thank you for the quick response!
- Matt G.
------- Original Message -------
On Thursday, December 22nd, 2022 at 1:44 PM, Phil Budne <phil(a)ultimate.com> wrote:
Matt G wrote:
One area of immediate curiosity for me is the
init system, whether the pages suggest it is more in line with research (rc and ttys
files) or TS (inittab, runlevels).
The init (VII) page mentions /etc/rc and refers to ttys (V) which says the file
consists of lines with three characters (enable, tty name, getty arg)
getty (VII) describes behaviors for 0, -, 1, 2
The one interesting bit in section (II) is lock (system call 62.) that
implements semaphores with subfunctions lock/unlock/tlock, all of
which take a non-negative semaphore ID called a flag.