PTYFS_CHANGE
while ((ptyfs)->ptyfs_status & (PTYFS_ACCESS|PTYFS_CHANGE|PTYFS_MODIFY)) \
pp->ptyfs_status = PTYFS_CHANGE;
ptyfs->ptyfs_status |= PTYFS_CHANGE;
ptyfs->ptyfs_status |= PTYFS_CHANGE | PTYFS_MODIFY;
ptyfs->ptyfs_status |= PTYFS_CHANGE;
KASSERT(ptyfs->ptyfs_status & (PTYFS_ACCESS|PTYFS_CHANGE|PTYFS_MODIFY));
if (ptyfs->ptyfs_status & PTYFS_CHANGE) {
ptyfs->ptyfs_status &= ~(PTYFS_ACCESS|PTYFS_CHANGE|PTYFS_MODIFY);