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KSH93 Bit Manipulation

When programmers think about bitwise manipulation, they usually think about using C or C++ to solve their problem since both programming languages provide a rich set of features which make it easy to perform bitwise manipulation. However it is possible to just as easily perform such operations using the ksh93 shell.  This post will explain what bitwise manipulation and number conversion facilities are available in ksh93 and provide some hopefully useful utilities and examples. Many programmers are unaware that ksh93 has builtin support for different numeral radices (AKA arithmetic bases) as shown in the following example. $ print $(( 10

Monitoring D-Bus

Because D-Bus operates for the most part under the hood invisible to the user, means of monitoring D-Bus messages is important for both activation and debugging purposes.  In this post I examine how to monitor and act on such messages.  I assume that you are relatively familiar with D-Bus. If not, you should look at my previous posts on D-Bus to gain an understanding of the basic concepts. Probably the most commonly used tool is the command line utility dbus-monitor which was written by Philip Blundell as part of the reference D-Bus implementation and which is standard on most D-Bus

Scripting Tomboy

Tomboy is an open source GNOME desktop note-taking application which is written in C# and utilizing the Mono runtime, Gtk# and the GtkSpell spell-checker. The actual release of Tomboy which comes with Fedora 10 is version 0.12.0.  This includes a comprehensive D-Bus interface which makes it possible to create, modify and display Tomcat notes from your shell scripts.  This post provides an overview of the available D-Bus methods and includes a number of examples for you to experiment with.  See my previous post on D-Bus scripting if you are unfamilar with the basic concepts of D-Bus scripting. First we will

Scripting D-Bus

D-Bus (Desktop Bus) is a low-latency, low-overhead, easy-to-use message bus technology which supports application launch and linking.  It is primarly used on GNU/Linux desktops but has been ported to other platforms including Microsoft Windows and Apple Mac OS X.&nbsp This post provides a quick overview of D-Bus concepts, some history, and some examples of how to use D-Bus in your shell scripts. Originally both the KDE and GNOME desktop projects used CORBA for inter-application communication.  Over time however, for various reasons, KDE migrated from CORBA to Desktop Comunications Protocol (DCOP) and GNOME migrated to Bonono.  This lead to the situation