Book Image

Go Systems Programming

Book Image

Go Systems Programming

Overview of this book

Go is the new systems programming language for Linux and Unix systems. It is also the language in which some of the most prominent cloud-level systems have been written, such as Docker. Where C programmers used to rule, Go programmers are in demand to write highly optimized systems programming code. Created by some of the original designers of C and Unix, Go expands the systems programmers toolkit and adds a mature, clear programming language. Traditional system applications become easier to write since pointers are not relevant and garbage collection has taken away the most problematic area for low-level systems code: memory management. This book opens up the world of high-performance Unix system applications to the beginning Go programmer. It does not get stuck on single systems or even system types, but tries to expand the original teachings from Unix system level programming to all types of servers, the cloud, and the web.
Table of Contents (13 chapters)

Your environment

In this section, we will show how to find out things about your environment using the runtime package: this can be useful when you have to take certain actions depending on the OS and the Go version you are using.

The use of the runtime package for finding out about your environment is straightforward and is illustrated in runTime.go:

package main 
 
import ( 
   "fmt" 
   "runtime" 
) 
 
func main() { 
   fmt.Print("You are using ", runtime.Compiler, " ") 
   fmt.Println("on a", runtime.GOARCH, "machine") 
   fmt.Println("with Go version", runtime.Version()) 
   fmt.Println("Number of Goroutines:", runtime.NumGoroutine())
} 

As long as you know what you want to call from the runtime package, you can get the information you desire. The last fmt.Println() command here displays information...