REALPATH
if (cnp->cn_flags & REALPATH && cnp->cn_rpi == 0) {
if (cnp->cn_flags & REALPATH) {
} else if (cnp->cn_flags & REALPATH) {
if (cnp->cn_flags & REALPATH) {
NDINIT(&nd, LOOKUP, FOLLOW | SAVENAME | REALPATH, UIO_SYSSPACE,