tti()

Pass data or error and control codes to io-char

Synopsis:

#include <sys/io-char.h>

int tti(TTYDEV *dev,
        unsigned c );

Arguments:

dev

A pointer to the structure that represents the specific device that data has been received on.

c

Contains received data and control codes that modify how the data is read and processed. See the TTI_* defines below for more details.

Description:

This function forwards data received by the hardware to io-char and passes error/control codes.

The control type is extracted from c, and is one of:

TTI_BREAK

Indicates a “break” signal has been detected by the hardware, or a VINTR character has been received.

TTI_QUIT

Internal to io-char. Indicates a VQUIT character has been received.

TTI_SUSP

Internal to io-char. Indicates a VSUSP character has been received.

TTI_OVERRUN

An overrun has been detected by the hardware.

TTI_FRAME

A framing error has been detected by the hardware.

TTI_PARITY

A parity error has been detected by the hardware.

TTI_CARRIER

Indicates to the io-char library that a carrier was detected (i.e. the hardware modem is online).

TTI_HANGUP

Indicates to io-char that the hardware modem is “hung up.” This type is the opposite of TTI_CARRIER

TTI_OHW_STOP

Used by hardware flow control to stop output.

TTI_OHW_CONT

Used by hardware flow control to start output.

Returns:

If this call returns 0, do nothing. If it returns 1, an event needs to be generated for io-char.

Classification:

QNX Neutrino

See also:

TTYDEV, ttc(), tti2(), tto()