Re: [Closed REQ 5266]: Geomview: (interest( pick world))

["Stuart Levy" <slevy>]

If geomview appears not to be responding, it's probably really sending
responses somewhere you don't expect!

Commands like "(interest ...)" and "(echo ...)" send replies to what's
deemed to be an appropriate place -- not necessarily standard output.
For commands read from .geomview, the responses aren't sent anywhere.


Some ways to set up bidirectional communication with geomview, assuming
you're starting geomview as a subprocess:

   1) Use geomview's standard input and standard output:

	geomview -c -   ...

       The "-c -" option causes commands to be read from input; their
       responses go to geomview's standard output.

   2) Use a pair of named pipes which you create before calling geomview:
	/etc/mknod inpipe p
	/etc/mknod outpipe p

	geomview -c '(command inpipe outpipe)' ...

      Then you'd write commands to inpipe and await responses on outpipe.

      In either case, you need to supply the "(interest ...)" commands via the
      corresponding pipe (piped to geomview's standard input or to "inpipe").


   3) If you have just a few commands which will need responses, you could 
	place them on geomview's command line:

	geomview -c '(interest (pick world))' ...

      Responses in this case go to geomview's standard output.

Hope this is some help...


   Stuart