golang 获取当前路径和上一级父路径（目录）

package main

//QQ:29295842
import (
"fmt"
"log"
"os"
"path/filepath"
"strings"
)

func substr(s string, pos, length int) string {
runes := []rune(s)
l := pos + length
if l > len(runes) {
l = len(runes)
}
return string(runes[pos:l])
}

func getParentDirectory(dirctory string) string {
return substr(dirctory, 0, strings.LastIndex(dirctory, "/"))
}

func getCurrentDirectory() string {
dir, err := filepath.Abs(filepath.Dir(os.Args[0]))
if err != nil {
log.Fatal(err)
}
return dir //strings.Replace(dir, "\\", "/", -1)
}

func main() {

//var str1, str2 string
str1 := getCurrentDirectory()
fmt.Println(str1)
//	str2 = getParentDirectory(str1)
//	fmt.Println(str2)

}