Book Image

Linux System Programming Techniques

By : Jack-Benny Persson
Book Image

Linux System Programming Techniques

By: Jack-Benny Persson

Overview of this book

Linux is the world's most popular open source operating system (OS). Linux System Programming Techniques will enable you to extend the Linux OS with your own system programs and communicate with other programs on the system. The book begins by exploring the Linux filesystem, its basic commands, built-in manual pages, the GNU compiler collection (GCC), and Linux system calls. You'll then discover how to handle errors in your programs and will learn to catch errors and print relevant information about them. The book takes you through multiple recipes on how to read and write files on the system, using both streams and file descriptors. As you advance, you'll delve into forking, creating zombie processes, and daemons, along with recipes on how to handle daemons using systemd. After this, you'll find out how to create shared libraries and start exploring different types of interprocess communication (IPC). In the later chapters, recipes on how to write programs using POSIX threads and how to debug your programs using the GNU debugger (GDB) and Valgrind will also be covered. By the end of this Linux book, you will be able to develop your own system programs for Linux, including daemons, tools, clients, and filters.
Table of Contents (14 chapters)

Changing terminal settings with stty

In this recipe, we'll learn how to change the settings (or attributes) of our terminal. In the previous recipe, we listed our current settings with stty -a. In this recipe, we'll change some of those settings, using the same stty program.

Knowing how to change your terminal settings will enable you to adapt it according to your preference.

Getting ready

No special requirements exist for this recipe.

How to do it…

Here, we will change some of the settings for our current terminal:

  1. Let's start by turning off echoing. Doing so is common—for example, for password prompts—but it can also be done manually, as we'll see here. After you turn off the terminal echo, you won't see anything you write. Everything still works, though—for example, we can type whoami, and get an answer. Notice that you won't see the whoami command as you type it:
    $> stty -echo
    $> whoami jake ...