Golang : Read directory content with os.Open

There are few ways to traverse a directory tree and content in Go. One of them is os.File.Readdir function. In this tutorial, we will see how to read a directory and display its files and size. This example will use the os.Open http://golang.org/pkg/os/#File.Readdir function.

 package main

 import (
 "fmt"
 "os"
 "path/filepath"
 )

 func main() {

 dirname := "." + string(filepath.Separator)

 d, err := os.Open(dirname)
 if err != nil {
 fmt.Println(err)
 os.Exit(1)
 }
 defer d.Close()

 files, err := d.Readdir(-1)
 if err != nil {
 fmt.Println(err)
 os.Exit(1)
 }

 fmt.Println("Reading "+ dirname)

 for _, file := range files {
 if file.Mode().IsRegular() {
 fmt.Println(file.Name(), file.Size(), "bytes")
 }
 }
 }

Test this code out and see the output of your directory. Hope this tutorial is helpful.