Prevent Multiple Instances from running Similtaneously

[DylanScottCarroll]

When there is already a single instance of volctl running, it is still possible to run it again, resulting in several volume icons appearing in the system tray.

More expected behavior would be that volctl would not be able to have multiple instances running simultaneously for a given user.

I encountered this issue when spawning the tray icon from my AwesomeWM rc script. The applet would be duplicated every time the window manager was reloaded.

[raven2cz]

The issue is not with the application itself, but rather with how the autostart script or the DEX system is being improperly utilized within your AwesomeWM approach. Many services need to be checked to determine whether they need to be launched again, a task primarily meant for the autostart script and DEX.

The first approach involves using this autostart script:
https://github.com/raven2cz/awesomewm-config/blob/master/autorun.sh

A superior alternative employs DEX:
https://github.com/raven2cz/dotfiles/blob/main/bin/start_process
https://github.com/raven2cz/dotfiles/tree/main/.config/autostart

[buzz]

dup #57