🚀 go-pugleaf

>Or if you have SysVr4, you might try putmsg and getmsg on streams

On what *kind* of streams?  (I.e., STREAMS is a general framework; to do
IPC on top of it, you need some particular thing that plugs into that
framework.  There's probably something in SVR4 that'll do....)

>but I'm not sure how that stuff interacts with select.

"select()", in SVR4, is implemented atop "poll()", so anything that
supports "poll()" - which should include anything implemented atop
STREAMS - should work with "select()", modulo bugs in the "select()"
implementation.