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From the last several weeks I am trying to display my USB and hub infimation in my C++ program. I nee to find the devices connected in USB hub in a tree structure using C++

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I don't have any personal experience of coding this but you could search for documentation on INotify. I understand that's how to get device notifications in user space on Linux. I have seen the kind of data it produces, you will have to parse a bunch of strings and build any required tree structure yourself.
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