Correct way to shutdown the FreeShow

[eKrajnak]

Hello,

we use the FreeShow software as text presentation software in our church. It's installed on RPi 5 and integrated to custom made app which control TV and also starts the FreeShow. I have make the systemd service file as follow:

[Unit]
Description=FreeShow software
After=network.target graphical-session.target

[Service]
Type=simple
User=blazej
Environment=DISPLAY=:0
ExecStart=/usr/bin/freeshow
Restart=never

[Install]
WantedBy=multi-user.target

Then FreeShow is setted up to enter fullscreen mode at startup. It works correctly. But when I shut down the FreeShow via GUI (cursor), it writes down "Saving ..." message for a few seconds and then closes. When I stop the FreeShow via Systemd, it seems to skip this "Saving ..." step and I think it's not correct.

Please, is there and signal code I can send to FreeShow to close "gracefully"?
Thank you

[vassbo]

Nice, you are correct. I actually am not sure if I can detect that in any way. I can add an API action to save and close the app if that helps.
Let me know if you got any suggestions for this.

[eKrajnak]

I think the correct way is to listen for SIGTERM signal. It's also the default signal sending by Systemd when stopping a service.

By default, a SIGTERM is sent, followed by 90 seconds of waiting followed by a SIGKILL.

[vassbo]

Thanks. This seems to be related: https://stackoverflow.com/questions/68132106/electron-detect-and-handle-sigint-sigterm-signals-in-linux
Would you like to try to implement this?

[eKrajnak]

Learning the code will take me too much time. I'll support ChurchApps to do so. :)

[vassbo]

Okay, I'll try to get it working then.

[vassbo]

Please check out the latest beta to see if it's working correctly or not: https://github.com/ChurchApps/FreeShow/releases/tag/v1.4.1-beta.2

[eKrajnak]

I can confirm the FreeShow now correctly listen to SIGTERM and SIGINT and performs saving before shutdown after receiving any of signals. Thank you!