FFLAGS
nflags = FFLAGS(dat->fc_flags & ~O_ACCMODE) & FCNTLFLAGS;
flags = FFLAGS(flags);
flags = FFLAGS(flags);
fp->f_flag = FFLAGS(oflag) & (FREAD | FWRITE);
flags = FFLAGS(oflags);
fmode = FFLAGS(uap->flags);