Make kernel be quiet about Ctrl-C when --quiet option is passed?

[gibiansky]

I have a use-case when I am starting a kernel programmatically, and thus get the Ctrl-C message.

I see that if I provide the parent PID in the JPY_PARENT_PID environment variable, the message isn't printed; but I don't have easy access to the parent PID so I would prefer for it to just be quiet.

a) Is there a reason that I should pass JPY_PARENT_PID, that the kernel uses for any good reason?
b) If not, could the --quiet option be checked here to prevent the kernel from printing the Ctrl-C message if it's set?

[minrk]

JPY_PARENT_PID is used so that the kernel will shut itself down if the process with that PID goes away. It's generally used to signal "Somebody started me, I shouldn't stick around if they are gone". The corollary is used for this io.rprint, in which the kernel guesses that it was started by hand with ipython kernel if this isn't specified, in which case it shows an extra message to the probable human at the terminal.

We can definitely check the log-level so that it's not printed if --quiet is given (#168), but I'm guessing it would be a good thing to pass JPY_PARENT_PID for any process that's spawning kernels, unless those kernels should survive longer than their parent.

[gibiansky]

Got it, thanks!