[Interest] Detecting if the application is already running from another user account

[Etienne Sandré-Chardonnal]

Hi,

I would like to detect if my application is already running from another
user account and warn the user.

I have tried QSharedMemory, but it seems that by design it is restricted to
a user namespace. I can create two shared memory segments with the same key
on the two user accounts and they work independently.

Is there any other option?

Thanks!

Etienne
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