|  | Qore Programming Language Reference Manual 2.2.0
    | 
| Variables | |
| const | Qore::TCSADRAIN = TCSADRAIN | 
| drain output, then change | |
| const | Qore::TCSAFLUSH = TCSAFLUSH | 
| drain output, flush input | |
| const | Qore::TCSANOW = TCSANOW | 
| make change immediate | |
| const | Qore::TCSASOFT = TCSASOFT | 
| flag - don't alter hardware state | |
If any of the constants in this group is not defined on the host system, then it will be assigned to 0 in Qore.