Question

I was going through the linux kernel sources and found this function definition.

function(struct net * const *pnet)

Can somebody explain what does this mean. Is it a net* or net** or const net* or const net**?

Thanks

Answer 1

In words: a (non-constant) pointer to a constant array of pointers to (non-constant) structs.

So, you can assign a different array:

pnet = myArrayOfStructs;

or you can change a struct:

pnet[k]->proc_inum = 17;

but you can’t change a complete struct:

pnet[k] = &pnet[k+1]; // compiler error