[TUHS] V6 networking & alarm syscall

[Clem Cole]

On Fri, Jan 11, 2019 at 5:09 PM <reed at reedmedia.net> wrote:

>
> The select system call was added in 81/02/07 with no comment. Commit
> history shows in 81/10/17: "cleanup (mpx removal, old tty removal,
> beginnings of select)" and in 81/10/11 "first boot with select()" which
> includes lots of changes like replace lots of tty code and use
> selwakeup().


Actually, that is a nice memory jog.   Chesson wrote mpx(2) for DataKit for
UNIX/TS.   IIRC: It was not originally part of v7, but he sent copies of
out to a number of folks.    Somwhere I might even have the email when he
sent it to me at CMU in the late 1970s.   The point is that it was in the
wild as it were at a lot of places; certainly at UCB by 4.1.    Sam and Joy
had seen  and messed with mpx(2) before select(2) was concieved.

To Paul's question - mpx(2) was done for networking.

Clem
ᐧ
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