The reader should have a general knowledge of C and C++ and be capable of writing, compiling, and executing C and C++ applications on Linux. In order to execute the examples in this book, the reader should also have access to an Intel-based computer running Ubuntu Linux 17.10 or higher. The reader should also ensure that GCC 7.0 or higher is installed using the following:

sudo apt-get install build-essential

You can download the example code files for this book from your account at www.packtpub.com. If you purchased this book elsewhere, you can visit www.packtpub.com/support and register to have the files emailed directly to you.

You can download the code files by following these steps:

1. Log in or register at www.packtpub.com.
2. Select the SUPPORT tab.
3. Click on Code Downloads & Errata.
4. Enter the name of the book in the Search box and follow the onscreen instructions.

Once the file is downloaded, please make sure that you unzip or extract the folder using the latest version of:

• WinRAR/7-Zip for Windows
• Zipeg/iZip/UnRarX for Mac
• 7-Zip/PeaZip for Linux

The code bundle for the book is also hosted on GitHub at https://github.com/PacktPublishing/Hands-On-System-Programming-with-CPP/. In case there's an update to the code, it will be updated on the existing GitHub repository.

We also have other code bundles from our rich catalog of books and videos available at https://github.com/PacktPublishing/. Check them out!

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "For example, look at the difference between using an std::array{} or a std::vector{} command."

A block of code is set as follows:

int array[10];

auto r1 = array + 1;
auto r2 = *(array + 1);
auto r3 = array[1];

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

int main()
{
    auto ptr1 = mmap_unique_server<int>(42);
    auto ptr2 = mmap_unique_client<int>();
    std::cout << *ptr1 << '\n';
    std::cout << *ptr2 << '\n';
}

Any command-line input or output is written as follows:

> cmake -DCMAKE_BUILD_TYPE=Release ..
> make

Bold: Indicates a new term, an important word, or words that you see on screen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Select System info from the Administration panel."