CMSG_DATA - Linux

Overview

The CMSG_DATA command is a part of the Linux kernel’s message queue system, which provides a mechanism for processes to communicate with each other. It is used to retrieve the control message data associated with a message queue.

Syntax

CMSG_DATA(msg)

Where:

• msg is a message queue identifier.

Options/Flags

None.

Examples

To retrieve the control message data associated with a message queue with an identifier of 12345, use the following command:

CMSG_DATA(12345)

This will return the control message data, which can be used to inspect the message queue’s properties or to perform other operations on the message queue.

Common Issues

None.

Integration

The CMSG_DATA command can be used in conjunction with other commands to manage message queues. For example, it can be used to create a message queue with the msgget command, and to send and receive messages with the msgsnd and msgrcv commands respectively.

Related Commands

• msgget
• msgsnd
• msgrcv