Your position in a file has to be uniquely specifiable with fpos_t, so you can't have an infinite file in C.
> fpos_t is a complete object type other than an array type capable of recording all the information needed to specify uniquely every position within a file.
[7.23.1p3 of N3054 working draft of C2x, as that's what I have open right now.]
> fpos_t is a complete object type other than an array type capable of recording all the information needed to specify uniquely every position within a file.
[7.23.1p3 of N3054 working draft of C2x, as that's what I have open right now.]