List of Figures

Acknowledgments

Figure I.1: Copyright 1999, Free Software Foundation, Inc. Permission is granted to copy, distribute, and/or modify this image under the terms in the GNU General Public License or GNU Free

Chapter 1: U/Linux History

Figure 1.1: Timeline of UNIX/Linux and the GNU. [RobotWisdom02]

Figure 1.2: Linux development timeline [Wikipedia04].

Chapter 2: GNU/Linux Architecture

Figure 2.1: High-level view of the GNU/Linux operating system.

Figure 2.2: GNU/Linux operating system architecture.

Figure 2.3: Abstraction provided by the Virtual File System.

Figure 2.4: Network subsystem hierarchy.

Chapter 4: The GNU Compiler Toolchain

Figure 4.1: The stages of compilation.

Chapter 5: Building Software with GNU make

Figure 5.1: Directory structure of example project.

Chapter 6: Building and Using Libraries

Figure 6.1: Memory savings of static versus shared libraries.

Chapter 9: Building Packages with automake/autoconf

Figure 9.1: Directory structure of example project.

Figure 9.2: Directory structure of example project with Autotool files.

Chapter 10: File Handling in GNU/Linux

Figure 10.1: Nonsequential reads in a binary file.

Chapter 11: Programming with Pipes

Figure 11.1:   Simple pipe example.

Figure 11.2:   Half-duplex pipe example from Listing 11.1.

Chapter 12: Introduction to Sockets Programming

Figure 12.1: Layered model of communication.

Figure 12.2: Graphical view of host/protocol/port relationship.

Figure 12.3: Visualization of a Socket between two hosts .

Figure 12.4: Client/server symmetry in Sockets applications.

Chapter 13: GNU/Linux Process Model

Figure 13.1: Graphical illustration of Listing 13.4.

Chapter 14: POSIX Threads (Pthreads) Programming

Figure 14.1: Forking a new process.

Figure 14.2: Creating a new thread.

Chapter 15: IPC with Message Queues

Figure 15.1:   Message queue API functions.

Chapter 16: Synchronization with Semaphores

Figure 16.1: Simple binary semaphore example with two processes.

Figure 16.2: Counting semaphore example with two processes.

Chapter 19: GNU/Linux Commands

Figure 19.1: Program input and output.

Chapter 21: Editing with sed

Figure 21.1: The sed model as a text filter.

Figure 21.2: Anatomy of a simple sed invocation.

Chapter 22: Text Processing with awk

Figure 22.1:   Structure of an awk program.

Chapter 23: Parser Generation with flex and bison

Figure 23.1: Parse tree for a sample C code fragment.

Figure 23.2: Incomplete parse tree for an erroneous C code fragment.

Figure 23.3: Typical phases in configuration parsing.

Figure 23.4: Parsing phases with flex and bison flows.

Figure 23.5: Grammar definitions in lexer and parser flow.

Chapter 24: Software Unit Testing Frameworks

Figure 24.1:   System testing (or end-to-end) perspective.

Figure 24.2:   System components are made up of units.

Figure 24.3:   Unit testing perspective of an individual software unit.