Function vn_fullpath_any

freebsd/kern/vfs_cache.c:3362–3392

}

static int
vn_fullpath_any(struct vnode *vp, struct vnode *rdir, char *buf, char **retbuf,
    size_t *buflen)
{
	size_t orig_buflen, addend;
	int error;

	if (*buflen < 2)
		return (EINVAL);

	orig_buflen = *buflen;

	vref(vp);
	addend = 0;
	if (vp->v_type != VDIR) {
		*buflen -= 1;
		buf[*buflen] = '\0';
		error = vn_vptocnp(&vp, buf, buflen);
		if (error)
			return (error);
		if (*buflen == 0) {
			vrele(vp);
			return (ENOMEM);
		}
		*buflen -= 1;
		buf[*buflen] = '/';
		addend = orig_buflen - *buflen;
	}

	return (vn_fullpath_dir(vp, rdir, buf, retbuf, buflen, addend));
}

/*
 * Resolve an arbitrary vnode to a pathname (taking care of hardlinks).