In the introduction to this chapter, we mentioned a requirement: from within a GUI frontend, to display the content of a system-generated PDF document. Lets do this here.
To do so, we would require a PDF reader application; we can assume we have one. Indeed, on many Linux distributions, the evince application is a good PDF reader application, usually preinstalled (true on Ubuntu and Fedora, among others).
Well, here, we shall not bother with a GUI frontend application, we shall use plain old C to write a CLI app that, given a PDF document pathname, executes the evince PDF reader application. What PDF document do we display? Ah, that's a surprise! (take a look):
For readability, only the relevant parts of the code are displayed ...
