-persist and the wxWidgets terminal, continued

[<tim...@en...>]

Hi,

I just tried the wxWidgets terminal with octave (2.1.73, not the last=20
development version though).

Bad news : it uses "persist" too.

octave uses a pipe to talk with gnuplot, and keeps it open through the=20
whole octave session. The "persist" behaviour appears when you close=20
octave (by issuing "quit" at octave prompt). I guess the process goes=20
the following way : octave closes the pipe, gnuplot engages its exit=20
process, the wxWidgets says "hold on !" until all the windows are=20
closed, and ... octave waits for gnuplot to terminate, so you end up=20
with what looks like a frozen prompt until you realize that you have to=20
close the wxt window (you can also hit ctrl-c twice to force octave to=20
close).

Like maxima, octave relies on the X11 "persist" behaviour.

Ethan suggested two alternatives :
- sending a fake signal SIGCHLD to octave, meaning "child process=20
terminated". I tried, and it does not work. octave does not wait for SIGC=
HLD
- mimic a 'bg' to gnuplot. Well, I don't know how to do that from=20
gnuplot, and I doubt it will actually work : since gnuplot's process is=20
still running, octave still waits for it.

Do any of you have a miraculous idea, or should I report that to the=20
octave developers as I did for maxima ?

Best regards,

Timoth=C3=A9e