filesystem test

test.go

package main

import (
	"fmt"
	"io/ioutil"
	"log"
	"os"
)

func main() {
	dir, err := os.Getwd()
	if err != nil {
		log.Fatal(err)
	}
	if len(os.Args) > 1 {
		dir = os.Args[1]
	}
	fmt.Printf(`Current dir: "%s"`+"\n", dir)
	f, err := os.Open(dir)
	if err != nil {
		log.Fatal("os.Open", err)
	}
	fi, err := f.Stat()
	if err != nil {
		log.Fatal("f.Stat", err)
	}
	fmt.Println("Main dir Stat:")
	printFi(fi)

	info, err := ioutil.ReadDir(dir)
	if err != nil {
		log.Fatal("ioutil.ReadDir", err)
	}
	fmt.Println("\nReaddir results:")
	for i := range info {
		fmt.Println("---")
		printFi(info[i])
	}
	fmt.Println("Success")
}

func printFi(fi os.FileInfo) {
	mode := fi.Mode()
	fmt.Printf(`Name "%s"`+"\n", fi.Name())
	fmt.Println("Size", fi.Size())
	fmt.Println("IsDir", fi.IsDir())
	fmt.Println("Mode.IsDir", mode.IsDir())
	fmt.Println("Mode.IsRegular", mode.IsRegular())
	fmt.Println("Mode.String", mode.String())
	fmt.Println("Mode.Perm:", mode.Perm().String())
}