Starting and stopping CLI apps from a node application

[hammer]

I have several CLI applications which are designed to shut down using cntrl-c which i would like to control using a node application (specifically a node-webmit app). Starting them is easy enough, but stopping them I'm not clear on. I thought maybe ncurses was the answer but all the information I can find about keyboard commands has to do with capturing them rather than sending them to an app. How can this be done in node?

[Александр М.]

Hello. If you send a signal SIGTERM, the application ignores it?

https://nodejs.org/api/child_process.html#child_process_child_kill_signal

[Edin M]

Have you tried child_process.kill

https://nodejs.org/api/child_process.html#child_process_child_kill_signal

child.kill([signal])#

• signal String

Send a signal to the child process. If no argument is given, the process will be sent 'SIGTERM'. See signal(7) for a list of available signals.

[Oleg Verych]

I have several CLI applications which are designed to shut down using cntrl-c which i would like to control using a node application

CTRL+C on TTY means that tty layer of kernel will send configured SIGNAL to the app, connected to that tty, i.e.

kill -INT `pid` 

Thus on start you should save pid of CLI app and then send signals to it or run `kill` program (or similar if not UNIX-like OS http://stackoverflow.com/questions/2214379/javascript-killing-a-process ).

[nin jin]

https://nodejs.org/api/child_process.html#child_process_child_kill_signal

[Francesco Cioffi]

If you are on Linux you can use kill for send signal to process.

Il venerdì 17 aprile 2015, hammer <hamm...@gmail.com> ha scritto:

I have several CLI applications which are designed to shut down using cntrl-c which i would like to control using a node application (specifically a node-webmit app). Starting them is easy enough, but stopping them I'm not clear on. I thought maybe ncurses was the answer but all the information I can find about keyboard commands has to do with capturing them rather than sending them to an app. How can this be done in node?

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[Ryan Schmidt]

On Apr 17, 2015, at 3:16 PM, hammer wrote:

> I have several CLI applications which are designed to shut down using cntrl-c which i would like to control using a node application (specifically a node-webmit app). Starting them is easy enough, but stopping them I'm not clear on. I thought maybe ncurses was the answer but all the information I can find about keyboard commands has to do with capturing them rather than sending them to an app. How can this be done in node?

Control-C is the usual way to terminate a program interactively, but the way to terminate a program programmatically is usually to send it a signal like SIGINT. Does that work for these programs you're trying to control?