get a route from within c code

[Andreani Luca <landreani@xxxxxxxxxxx>]

I woluld like to know if there is a way to know the route to a destination
without asking it via console (ip route get) but from within c code.
One possible way is to make system("ip route gat xxx.xxx.xxx.xxx"), redirect
to a file and then read the file.
Is there a simpler and more efficient way?

Thanks,

Luca Andreani
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