How can I access the USB on my iPhone via Python / C?

I was wondering how to get access to the USB (kind of /dev/usb) on my jailbroken iPhone, and ho开发者_StackOverflow中文版w could I listen what is going on ( when I plug a device on my iPhone ) for a debug purpose (because I try to create a device that I could connect directly on my iPhone).

Thanks.

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