fix incompatible file type checking on Windows

pkg/util/mount/mount.go

@@ -19,6 +19,7 @@ limitations under the License.
 package mount
 
 import (
+	"fmt"
 	"os"
 	"path/filepath"
 	"strings"
@@ -337,3 +338,37 @@ func startsWithBackstep(rel string) bool {
 	// normalize to / and check for ../
 	return rel == ".." || strings.HasPrefix(filepath.ToSlash(rel), "../")
 }
+
+// getFileType checks for file/directory/socket and block/character devices
+func getFileType(pathname string) (FileType, error) {
+	var pathType FileType
+	info, err := os.Stat(pathname)
+	if os.IsNotExist(err) {
+		return pathType, fmt.Errorf("path %q does not exist", pathname)
+	}
+	// err in call to os.Stat
+	if err != nil {
+		return pathType, err
+	}
+
+	// checks whether the mode is the target mode
+	isSpecificMode := func(mode, targetMode os.FileMode) bool {
+		return mode&targetMode == targetMode
+	}
+
+	mode := info.Mode()
+	if mode.IsDir() {
+		return FileTypeDirectory, nil
+	} else if mode.IsRegular() {
+		return FileTypeFile, nil
+	} else if isSpecificMode(mode, os.ModeSocket) {
+		return FileTypeSocket, nil
+	} else if isSpecificMode(mode, os.ModeDevice) {
+		if isSpecificMode(mode, os.ModeCharDevice) {
+			return FileTypeCharDev, nil
+		}
+		return FileTypeBlockDev, nil
+	}
+
+	return pathType, fmt.Errorf("only recognise file, directory, socket, block device and character device")
+}

pkg/util/mount/mount_linux.go

@@ -423,31 +423,7 @@ func (mounter *Mounter) MakeRShared(path string) error {
 }
 
 func (mounter *Mounter) GetFileType(pathname string) (FileType, error) {
-	var pathType FileType
-	finfo, err := os.Stat(pathname)
-	if os.IsNotExist(err) {
-		return pathType, fmt.Errorf("path %q does not exist", pathname)
-	}
-	// err in call to os.Stat
-	if err != nil {
-		return pathType, err
-	}
-
-	mode := finfo.Sys().(*syscall.Stat_t).Mode
-	switch mode & syscall.S_IFMT {
-	case syscall.S_IFSOCK:
-		return FileTypeSocket, nil
-	case syscall.S_IFBLK:
-		return FileTypeBlockDev, nil
-	case syscall.S_IFCHR:
-		return FileTypeCharDev, nil
-	case syscall.S_IFDIR:
-		return FileTypeDirectory, nil
-	case syscall.S_IFREG:
-		return FileTypeFile, nil
-	}
-
-	return pathType, fmt.Errorf("only recognise file, directory, socket, block device and character device")
+	return getFileType(pathname)
 }
 
 func (mounter *Mounter) MakeDir(pathname string) error {

pkg/util/mount/mount_windows.go

@@ -201,31 +201,7 @@ func (mounter *Mounter) MakeRShared(path string) error {
 
 // GetFileType checks for sockets/block/character devices
 func (mounter *Mounter) GetFileType(pathname string) (FileType, error) {
-	var pathType FileType
-	info, err := os.Stat(pathname)
-	if os.IsNotExist(err) {
-		return pathType, fmt.Errorf("path %q does not exist", pathname)
-	}
-	// err in call to os.Stat
-	if err != nil {
-		return pathType, err
-	}
-
-	mode := info.Sys().(*syscall.Win32FileAttributeData).FileAttributes
-	switch mode & syscall.S_IFMT {
-	case syscall.S_IFSOCK:
-		return FileTypeSocket, nil
-	case syscall.S_IFBLK:
-		return FileTypeBlockDev, nil
-	case syscall.S_IFCHR:
-		return FileTypeCharDev, nil
-	case syscall.S_IFDIR:
-		return FileTypeDirectory, nil
-	case syscall.S_IFREG:
-		return FileTypeFile, nil
-	}
-
-	return pathType, fmt.Errorf("only recognise file, directory, socket, block device and character device")
+	return getFileType(pathname)
 }
 
 // MakeFile creates a new directory