https://github.com/kubernetes/kubernetes/issues/99173

fileinfo.go

package main

import (
	"fmt"
	"os"
	"syscall"
	"unsafe"

	"golang.org/x/sys/windows"
)

var (
	modkernel32            = windows.NewLazySystemDLL("kernel32.dll")
	procGetDiskFreeSpaceEx = modkernel32.NewProc("GetDiskFreeSpaceExW")
)

func main() {
	fmt.Printf("dir test\n")
	fb, _, _, _, _, _, err := Info("C:\\Windows\\System32")

	if err != nil {
		fmt.Println(err)
		os.Exit(1)
	}

	fmt.Printf("success fb: %v\n", fb)

	fmt.Printf("file test\n")
	fb, _, _, _, _, _, err = Info("C:\\Windows\\System32\\sysclass.dll")

	if err != nil {
		fmt.Println(err)
		os.Exit(1)
	}

	fmt.Printf("success fb: %v\n", fb)
}

func Info(path string) (int64, int64, int64, int64, int64, int64, error) {
	var freeBytesAvailable, totalNumberOfBytes, totalNumberOfFreeBytes int64
	var err error

	ret, _, err := syscall.Syscall6(
		procGetDiskFreeSpaceEx.Addr(),
		4,
		uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(path))),
		uintptr(unsafe.Pointer(&freeBytesAvailable)),
		uintptr(unsafe.Pointer(&totalNumberOfBytes)),
		uintptr(unsafe.Pointer(&totalNumberOfFreeBytes)),
		0,
		0,
	)
	if ret == 0 {
		return 0, 0, 0, 0, 0, 0, err
	}

	return freeBytesAvailable, totalNumberOfBytes, totalNumberOfBytes - freeBytesAvailable, 0, 0, 0, nil
}

output.txt

dir test
success fb: 182443642880
file test
The directory name is invalid.
exit status 1