capng_save_state - get the internal library state
capng_save_state is a function that returns a pointer to the internal
state of the libcap-ng library. It should be considered opaque and not
for alteration directly. This function should be used when you suspect
a third party library may use libcap-ng also and want to make sure it
doesn’t alter something important. This function is not available in
the python bindings.
This returns NULL on failure and a non-NULL pointer otherwise.