go file

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if srcFile, err = os.Open(localPath); err != nil {
		logger.Errorf("failed to read src file: %v", err)
		return
	}
defer srcFile.Close()
fileInfo, err := srcFile.Stat()
	fileSize := fileInfo.Size() // file size

os.PathSeparator

file, _ := os.Getwd()

log.Println("current path:", file)

file, _ = exec.LookPath(os.Args[0])
log.Println("exec path:", file)

dir,_ := path.Split(file)
log.Println("exec folder relative path:", dir)

os.Chdir(dir)
wd, _ := os.Getwd()
log.Println("exec folder absolute path:", wd)