fuse_copy_args
err = fuse_copy_args(cs, args->in_numargs, args->in_pages,
return fuse_copy_args(cs, args->out_numargs, args->out_pages,
err = fuse_copy_args(&cs, num_args, args->in_pages,
int fuse_copy_args(struct fuse_copy_state *cs, unsigned int numargs,