ISUID
(dp->i_mode & ISUID) && dp->i_uid) {
dmode |= ISUID;
(pdir->i_mode & ISUID) &&
if ((ip->i_mode & (ISUID | ISGID)) && resid > uio->uio_resid &&
ip->i_mode &= ~(ISUID | ISGID);
if ((ip->i_mode & (ISUID | ISGID)) && (ouid != uid || ogid != gid)) {
ip->i_mode &= ~(ISUID | ISGID);
ip->i_mode &= ~(ISUID | ISGID);
(dp->i_mode & ISUID) && dp->i_uid) {
dmode |= ISUID;
(pdir->i_mode & ISUID) &&
ip->i_mode &= ~(ISUID | ISGID);