Operate on BlueZ provided file descriptor in C

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Hello

I am attempting to work with the org.bluez.Profile1 in BlueZ 5.44. When connecting with a new device via the NewConnection DBus method, we get a file descriptor to work with. I am fairly confused on what state this file descriptor is in, and what I need to do in order to read/write from it. Simply calling read/write does not behave as expected for me.

In the file test/test-profile, I see this line of python code:

self.fd = fd.take()

I am struggling to find the Linux C equivalent to the take method, as I believe this is what I need to do to operate on the fd. Any advice on how to configure this fd in Linux C code so I can read/write with the fd would be very helpful!

Thanks
Austin
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