mt_utils_windows.go

Documentation: k8s.io/kubernetes/test/images/agnhost/mounttest

     1  //go:build windows
     2  // +build windows
     3  
     4  /*
     5  Copyright 2019 The Kubernetes Authors.
     6  
     7  Licensed under the Apache License, Version 2.0 (the "License");
     8  you may not use this file except in compliance with the License.
     9  You may obtain a copy of the License at
    10  
    11      http://www.apache.org/licenses/LICENSE-2.0
    12  
    13  Unless required by applicable law or agreed to in writing, software
    14  distributed under the License is distributed on an "AS IS" BASIS,
    15  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    16  See the License for the specific language governing permissions and
    17  limitations under the License.
    18  */
    19  
    20  package mounttest
    21  
    22  import (
    23  	"bytes"
    24  	"fmt"
    25  	"os"
    26  	"os/exec"
    27  	"path/filepath"
    28  	"strconv"
    29  	"strings"
    30  )
    31  
    32  func umask(mask int) int {
    33  	// noop for Windows.
    34  	return 0
    35  }
    36  
    37  func fileOwner(path string) error {
    38  	// Windows does not have owner UID / GID. However, it has owner SID.
    39  	// not currently implemented in Kubernetes, so noop.
    40  	return nil
    41  }
    42  
    43  func fileMode(path string) error {
    44  	if path == "" {
    45  		return nil
    46  	}
    47  
    48  	permissions, err := getFilePerm(path)
    49  	if err != nil {
    50  		return err
    51  	}
    52  
    53  	fmt.Printf("mode of Windows file %q: %v\n", path, permissions)
    54  	return nil
    55  }
    56  
    57  func filePerm(path string) error {
    58  	if path == "" {
    59  		return nil
    60  	}
    61  
    62  	permissions, err := getFilePerm(path)
    63  	if err != nil {
    64  		return err
    65  	}
    66  
    67  	fmt.Printf("perms of Windows file %q: %v\n", path, permissions)
    68  	return nil
    69  }
    70  
    71  func getFilePerm(path string) (os.FileMode, error) {
    72  	var (
    73  		out    bytes.Buffer
    74  		errOut bytes.Buffer
    75  	)
    76  
    77  	// NOTE(claudiub): Symlinks have different permissions which might not match the target's.
    78  	// We want to evaluate the permissions of the target's not the symlink's.
    79  	info, err := os.Lstat(path)
    80  	if err == nil && info.Mode()&os.ModeSymlink != 0 {
    81  		evaluated, err := filepath.EvalSymlinks(path)
    82  		if err != nil {
    83  			return 0, err
    84  		}
    85  		path = evaluated
    86  	}
    87  
    88  	cmd := exec.Command("powershell.exe", "-NonInteractive", "./filePermissions.ps1",
    89  		"-FileName", path)
    90  	cmd.Stdout = &out
    91  	cmd.Stderr = &errOut
    92  	err = cmd.Run()
    93  
    94  	if err != nil {
    95  		fmt.Printf("error from PowerShell Script: %v, %v\n", err, errOut.String())
    96  		return 0, err
    97  	}
    98  
    99  	output := strings.TrimSpace(out.String())
   100  	val, err := strconv.ParseInt(output, 8, 32)
   101  	if err != nil {
   102  		fmt.Printf("error parsing string '%s' as int: %v\n", output, err)
   103  		return 0, err
   104  	}
   105  
   106  	return os.FileMode(val), nil
   107  }
   108  
   109  func fsType(path string) error {
   110  	// only NTFS is supported at the moment.
   111  	return nil
   112  }
   113
View as plain text