Monthly Archives: November 2016
Replace the system call in Linux using the kernel module.

This example is not necessary to check anywhere else, it is not safe for the operating system and user data!

In this example we will replace the system call “write”. This kernel module replaces the data that is displayed to stdout on the word “moo” for a specific user.

cowsay.c:

Makefile:

Let us compile module and check how it works.