Hands-On Systems Programming with Rust: A Project-Based Approach

Preface....5 What Is Rust?....5 Who Should Read This Book....8 Why You Should Learn Rust....9 The Coding Challenges....10 Getting Rust and the Code....11 Conventions Used in This Book....14 Using Code Examples....15 O’Reilly Online Learning....16 How to Contact Us....16 Acknowledgments....17 1. Echo Canyon....18 Starting a New Binary Program with Cargo....19 How echo Works....22 Getting Command-Line Arguments....25 Adding a Project Dependency....29 Parsing Command-Line Arguments Using clap....31 Creating the Program Output....36 Writing and Running Integration Tests....40 Creating the Test Output Files....44 Comparing Program Output....45 Using the Result Type....47 Summary....50 2. On The Catwalk....53 How cat Works....54 Getting Started with Test-Driven Development....58 Code Organization....60 Defining the Parameters....61 Processing the Files....70 Solution....73 Reading the Lines in a File....73 Printing Line Numbers....75 Reading Standard In....78 Going Further....80 Summary....80 3. Head Aches....82 How head Works....83 Getting Started....86 Defining and Validating the Arguments....91 Parsing Strings into Numbers....92 Converting Strings into Errors....98 Writing the run() Function....102 Solution....105 Reading a File Line-by-line....105 Preserving Line Endings While Reading a File....106 Reading Bytes and Characters....109 Printing the File Separators....112 Going Further....114 Summary....114 4. The Tailor....116 How tail Works....117 Getting Started....122 Defining the Arguments....122 Reading the End of a File....129 Solution....130 Going Further....139 Summary....139 5. Elless Island....141 How ls Works....142 Getting Started....145 Defining the Arguments....146 Writing the Program....148 Displaying Octal Permissions....154 Solution....160 Testing....168 Going Further....173 Summary....174 6. Word To Your Mother....175 How wc Works....176 Getting Started....181 Iterating the Files....189 Solution....190 Counting the Elements of a File or STDIN....190 Formatting the Output....197 Going Further....203 Summary....204