Re: pluto not responding -- possibly not re-entrant (updown)

| From: John S. Denker <[email protected]>
| Date: Fri, 28 Feb 2003 08:42:17 -0500

[Sorry for the slow reply.  I'm way behind in list reading.]

Pluto is what structured as a transaction system.  Essentially like an
even-driven program.  It receives an event, processes it completely
(atomically), and then goes back to wait for the next event.  That is
a transaction.

The updown script is run within a transaction.  No whack command
issued by the updown can complete until the updown script has returned
control to its caller.

It is possible for the updown script to fork off a subprocess that
lives past the end of the main script.  Such a subprocess could
reasonably include a whack command.

Hugh Redelmeier
[email protected]  voice: +1 416 482-8253