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QNX Software Development Platform
QNX SDP is a cross-compiling and debugging environment, including an IDE and command-line tools, for building binary images and programs for target boards running the QNX OS 8.0.
Utilities & Libraries
Devctl and Ioctl Commands
PTP_*
PTP_SET_COMPENSATION

QNX Momentics IDE User's Guide
This User's Guide describes version 8.0 of the Integrated Development Environment (IDE) that's part of the QNX Tool Suite.
QNX Software Development Platform
QNX SDP is a cross-compiling and debugging environment, including an IDE and command-line tools, for building binary images and programs for target boards running the QNX OS 8.0.
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Typographical Conventions, Support, and Licensing
This section describes the typographical conventions used throughout the documentation, explains how to obtain technical support, and provides some information about licensing.

PTP_SET_COMPENSATION

Set the current PTP compensation value

Synopsis

#include <io-sock/ptp.h>

#define PTP_SET_COMPENSATION	0x104

Arguments to ioctl():


Argument	Value
fd	File descriptor obtained by opening the device
request	SIOCSDRVSPEC
Additional argument	A pointer to an `ifdrv`

Description

This command sets the current compensation value (from a ptp_comp) for the PTP module.

Input

A filled-in ifdrv structure, defined in net/if.h.

struct ifdrv {
	char		ifd_name[IFNAMSIZ];
	unsigned long	ifd_cmd;
	size_t		ifd_len;
	void		*ifd_data;
};

Fill in each member using the following information:

ifd_name: The interface name; e.g., en0
ifd_cmd: PTP_SET_COMPENSATION
ifd_len: The size of a ptp_comp
ifd_data: A pointer to a ptp_comp structure that contains the compensation value to set

Output

None.

Page updated: August 11, 2025