ASYNC GETLINECTRL

This function returns the line characteristics (data bits, parity, stop bits, break).

Category

IOCTL_ASYNC (01h)

Function

ASYNC_GETLINECTRL (62h)

Parameter Packet Format

None. Packet pointer must be NULL.

Data Packet Format

┌──────────────────────────────────────────────┐
│Field                  Length     C Datatype  │
├──────────────────────────────────────────────┤
│Data Bits              BYTE       BYTE        │
├──────────────────────────────────────────────┤
│Parity                 BYTE       BYTE        │
├──────────────────────────────────────────────┤
│Stop Bits              BYTE       BYTE        │
├──────────────────────────────────────────────┤
│Transmitting Break     BYTE       BYTE        │
└──────────────────────────────────────────────┘

Related C Data Structure

The LINECONTROL data structure can be used by C programmers.

To include this data structure in your file, make sure INCL_DOSDEVIOCTL is defined before you include OS2.H.

Data Bits

See ASYNC_SETLINECTRL.

Parity

See ASYNC_SETLINECTRL.

Stop Bits

See ASYNC_SETLINECTRL.

Transmitting Break

0 not currently transmitting break

1 currently transmitting break

Returns

If the call is made with an invalid Parameter Packet value, a general failure error is reported and valid information is not returned in the Data Packet.

Remarks

If a general failure error is not returned, the physical device driver returns the line characteristics as defined.