bn

Set the baud rate to n.

cn

Set hangup on DCD if n is non-zero; else clear it.

dn

Set DTR if n is non-zero; else clear it.

en

Set hangup on DSR if n is non-zero; else clear it.

f

Flush output queue.

h

Close input and output queues.

in

Enable/disable the FIFOs. If n is zero the FIFOs are disabled; otherwise n is taken as a trigger level for the FIFOs. The trigger levels supported are device dependant, but usually include 1, 4 and 8. An unrecognised, but non-zero, value of n causes the maximum-supported trigger level to be set.

kn

Send a break lasting n milliseconds.

ln

Set number of bits per byte to n. Legal values are 5, 6, 7, or 8.

mn

Obey modem CTS signal if n is non-zero; else clear it.

n

Make writes non-blocking.

pc

Set parity to odd if c is o, to even if c is e; else set no parity.

qn

Set input and output queue limits to n.

rn

Set RTS if n is non-zero; else clear it.

sn

Set number of stop bits to n. Legal values are 1 or 2.

wn

Set the uart clock timer to n times 100us.

The status files contain a textual representation of the status of the line, in the format of the commands used on the control file.