Function vnode_close_locked

freebsd/kern/kern_sig.c:3488–3494

    "Process corefile name format string");

static void
vnode_close_locked(struct thread *td, struct vnode *vp)
{

	VOP_UNLOCK(vp);
	vn_close(vp, FWRITE, td->td_ucred, td);
}

/*
 * If the core format has a %I in it, then we need to check