nanogui: Thread: Best way to restart/shutdown app

Hello folks.

Question:   I have a background process monitoring a serial port and a TCP
port.  Based off of information from that process, I want to start/stop a
Nano-X application.  

Sequence of events goes something like this:

1)  Main Application is running.
2)  User on the other end of the serial port or TCP starts a download
3)  Main Application is stopped
4)  Standby Application is run (with some config settings)
5)  New files are downloaded
6)  Main application is re-launched.

Whats the best way to to do?  Keep the Nano-X server running and just start
and stop the application?  

Alex Pavloff
Software Engineer
Eason Technology 

Alex Pavloff wrote:
> 1)  Main Application is running.
> 2)  User on the other end of the serial port or TCP starts a download
> 3)  Main Application is stopped

The simplest way might be to just do:
	system("killall your_app");

Or store the PID in a file somewhere when it is started and use that to 
supply the argument to kill().

You could use SIGUSR1 and have the main app catch that signal if you 
want it to do some special processing as it shuts down that wouldn't 
normally be done if the program was killed.

-- 
------------ Alex Holden - http://www.linuxhacker.org ------------
If it doesn't work, you're not hitting it with a big enough hammer

> Whats the best way to to do?  Keep the Nano-X server running and just
start
> and stop the application?

If you don't mind keeping screen in graphics mode,
keeping the nano-X server running will allow other programs
to access the screen graphically.  Starting/stopping client applications
doesn't affect the screen, except that stopping an application
will cause all client windows to be destroyed.

Regards,

Greg