Golang : Read directory content with os.Open



Tags : golang os

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.

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  See also : Golang : Read directory content with filepath.Walk()



Tags : golang os

By Adam Ng

IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.


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