Output Redesign in SystemTap Runtime

[Martin Hunt]

On Mon, 2005-04-25 at 19:01 -0700, Roland McGrath wrote:
> > 7. What about probes with custom GUI interfaces?  Do we define a way for
> > stpd to fork and forward data to a GUI app, or do we simply structure
> > stpd so anyone can grab the sources and easily build a custom version of
> > it?
> 
> What about having stpd just do the set up of an independent channel that
> something else can use?  i.e., a new netlink socket, or a new named relayfs
> channel (I'm glossing over the details because I don't remember the details
> of relayfs clearly).  If necessary, we could provide a small library for
> applications paired with some probe kernel runtime interfaces for setting
> up and using such channels.  It's possible to do something like have an
> application contact stpd and get back a file descriptor for its channel.

That's what I meant by the first option above.  I imagine that the
SystemTap script would specify an executable to receive the data and
stpd would start that up and send data to it.

Martin