This book does not aim to teach you every aspect and function that is available within the Perl environment. Nor is it intended to be an example of the perfect path to a particular goal using Perl. There are a number of ways and methods in which different goals can be achieved in any language, and Perl is no exception to this rule. Instead, my aim is to demonstrate the use of Perl in real-world situations, showing examples and detailed reasons as to why the programmer followed a certain path and structure for the script.Many of the scripts in this book are taken directly from my own toolkit of scripts and utilities that I have been using for many years. Others have been taken from the Internet, with the author’s permission, and are included in this book in the same consistent style, with the same level of annotations. In all cases, I’d like to make it clear that the scripts are not taken to be the ultimate or perfect method of achieving a particular goal. What I can say is that all of the scripts work, and they all do what they set out to do.Who the book is forI’ve not targeted the book at any one specific group of Perl users. To put it simply, if you program in Perl, then you will find this book useful. For beginners, the book provides a useful introduction to how programs are structured and how the different functions and constructs in Perl allow you to do both simple and more complex tasks.For the intermediate programmer, this book should give you ideas and pointers to improving your Perl programming, and what tools and modules to use when approaching different problems with Perl. For the more advanced user, these scripts can help augment and form the basis of other projects you are working on, and they may even open doors to other solutions for particular problems that you had not originally considered.In all cases, I have designed the scripts to be standalone examples of how to achieve different goals. All of the scripts can be taken directly from the book’s CD-ROM and used within your own systems, albeit with minor modifications to take account of your local setup. Any required modules and extensions are supplied. The latest versions of the chapter scripts are available here for download – use the download panel on the right hand side of the window.How to use Perl Annotated ArchivesThere is no natural progression through the book, so you can pick it up at any point in any chapter, and you should be able to follow the scripts. Keep in mind, though, that a number of the chapters include a module as one of the first annotations. Although reading one of the later scripts without having first studied the module may leave some gaps in your understanding, the script ought to make sense.Where applicable, the annotations include possible script modifications and updates so you can customize it for your own environment or expand its capabilities and features. Alternatively, if the script does exactly what you want, and you are not interested in the annotations, just go ahead and use the script!
When the BeOS was first released it was obvious to me and many others that it would be a platform that suited both the GUI lover, and the Unix style command line interface geek. Developing for the former requires you to learn the BeOS API, including the client/server system, BMessages and the objects and classes that make up the BeOS interface.But if you want to take advantage of the POSIX support included with the BeOS and use the wide range of open source software such as that from GNU and many others. However, there are problems with the BeOS when it comes to porting Unix applications. Not all of the features, functions and programs are supported, and those that are have bugs, gaps, or just plain dont work.The idea behind BeOS: Porting Unix Applications was therefore to guide the reader from downloading the source code to using the application. This involves how to extract the archives you’ve downloaded, how to use the configuration systems, including how to make them work with the BeOS, and how to plug the gaps and missing areas of the BeOS functionality.Features
- Supports BeOS Release 3.
- Provides a step-by-step guide to the porting process, from download the source to installing the application.
- Explains how to port off the shelf utilities like Emacs and Perl as well as your own programs and tools to the BeOS.
- Offers a comprehensive Unix/POSIX vs. BeOS reference for anyone who is porting or writing software for the BeOS.
- Furnishes a simple catalog of tools and features available on the BeOS.
A Note About CompatibilityAlthough the book was written at a time when PPC was the main version of the BeOS, much of the content is still relevant both to the older Intel implementations using Metrowerks development tools, and the newer GNU based development toolkit. This is because the development tool differences make very little difference to the core OS libraries and functions provided by the BeOS.