Parent topic: TIOC*

TIOCMGET

Updated: October 28, 2024

Get all modem bits

Synopsis:

#include <sys/ioctl.h>

#define TIOCMGET        _IOR('t', 106, int)

Arguments to ioctl():

Argument	Value
`fd`	A file descriptor that you obtained by opening the device
`request`	TIOCMGET
Additional argument	A pointer to an int

Description:

This command gets all modem status bits for the terminal device. It's also implemented as the DCMD_CHR_LINESTATUS devctl() command.

Input:

None.

Output:

The modem bits, a combination of the following:

TIOCM_DTR — data terminal ready.
TIOCM_RTS — request to send.
TIOCM_CTS — clear to send.
TIOCM_DSR — data set ready.
TIOCM_RI or TIOCM_RNG — ring.
TIOCM_CAR or TIOCM_CD — carrier detect.

See also:

DCMD_CHR_LINESTATUS, TIOCMBIC, TIOCMBIS, TIOCMSET

ioctl() in the QNX Neutrino C Library Reference

Parent topic: TIOC*