cmode
static const struct cmode modes[] = {
const struct cmode *cm;
int cmode, flags;
cmode = ((mode &~ fdp->fd_cmask) & ALLPERMS) & ~S_ISTXT;
error = vn_open(nd, &nfp, flags, cmode);
vn_open(struct nlookupdata *nd, struct file **fpp, int fmode, int cmode)
vap->va_mode = cmode;
int vn_open (struct nlookupdata *ndp, struct file **fpp, int fmode, int cmode);