Control settings:
Generate parity bit in output and expect parity bit in input. May be negated.
Set odd parity (even if negated). May be negated.
Use "stick" (mark/space) parity. If parodd is set, the parity bit is always 1; if parodd is not set, the parity bit is always zero. Non-POSIX. May be negated.
Set character size to 5, 6, 7, or 8 bits.
Send a hangup signal when the last process closes the tty. May be negated.
Use two stop bits per character (one if negated). May be negated.
Allow input to be received. May be negated.
Disable modem control signals. May be negated.
Enable RTS/CTS flow control. Non-POSIX. May be negated.
Enable DTR/DSR flow control. Non-POSIX. May be negated.