Summary

Drawing from the analogy of traveling, we’ve seen how system calls act as passports, allowing processes to navigate the vast terrains of software execution. We’ve distinguished between user mode and kernel mode, emphasizing the privileges and restrictions associated with each. The chapter also sheds light on the challenges faced by the syscall package in Go, leading to its eventual deprecation in favor of the more maintainable x/sys package. Furthermore, throughout this chapter, we’ve successfully built a CLI application, harnessing the power of Go’s os and x/sys packages. We’ve seen firsthand how system calls can be integrated into practical software solutions, enabling direct interactions with the operating system. As you move forward, remember the best practices highlighted and the skills acquired, ensuring safe, efficient system-level programming and robust CLI tool creation in Go.

In the next chapter, we will explore the world of file...