mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-18 20:30:23 +00:00
123 lines
3.2 KiB
Go
123 lines
3.2 KiB
Go
/*
|
|
Copyright 2018 The Kubernetes Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package fs
|
|
|
|
import (
|
|
"fmt"
|
|
"io/ioutil"
|
|
"log"
|
|
"os"
|
|
"path/filepath"
|
|
)
|
|
|
|
var _ FileSystem = realFS{}
|
|
|
|
// realFS implements FileSystem using the local filesystem.
|
|
type realFS struct{}
|
|
|
|
// MakeRealFS makes an instance of realFS.
|
|
func MakeRealFS() FileSystem {
|
|
return realFS{}
|
|
}
|
|
|
|
// Create delegates to os.Create.
|
|
func (realFS) Create(name string) (File, error) { return os.Create(name) }
|
|
|
|
// Mkdir delegates to os.Mkdir.
|
|
func (realFS) Mkdir(name string) error {
|
|
return os.Mkdir(name, 0777|os.ModeDir)
|
|
}
|
|
|
|
// MkdirAll delegates to os.MkdirAll.
|
|
func (realFS) MkdirAll(name string) error {
|
|
return os.MkdirAll(name, 0777|os.ModeDir)
|
|
}
|
|
|
|
// RemoveAll delegates to os.RemoveAll.
|
|
func (realFS) RemoveAll(name string) error {
|
|
return os.RemoveAll(name)
|
|
}
|
|
|
|
// Open delegates to os.Open.
|
|
func (realFS) Open(name string) (File, error) { return os.Open(name) }
|
|
|
|
// CleanedAbs returns a cleaned, absolute path
|
|
// with no symbolic links split into directory
|
|
// and file components. If the entire path is
|
|
// a directory, the file component is an empty
|
|
// string.
|
|
func (x realFS) CleanedAbs(
|
|
path string) (ConfirmedDir, string, error) {
|
|
absRoot, err := filepath.Abs(path)
|
|
if err != nil {
|
|
return "", "", fmt.Errorf(
|
|
"abs path error on '%s' : %v", path, err)
|
|
}
|
|
deLinked, err := filepath.EvalSymlinks(absRoot)
|
|
if err != nil {
|
|
return "", "", fmt.Errorf(
|
|
"evalsymlink failure on '%s' : %v", path, err)
|
|
}
|
|
if x.IsDir(deLinked) {
|
|
return ConfirmedDir(deLinked), "", nil
|
|
}
|
|
d := filepath.Dir(deLinked)
|
|
if !x.IsDir(d) {
|
|
// Programmer/assumption error.
|
|
log.Fatalf("first part of '%s' not a directory", deLinked)
|
|
}
|
|
if d == deLinked {
|
|
// Programmer/assumption error.
|
|
log.Fatalf("d '%s' should be a subset of deLinked", d)
|
|
}
|
|
f := filepath.Base(deLinked)
|
|
if filepath.Join(d, f) != deLinked {
|
|
// Programmer/assumption error.
|
|
log.Fatalf("these should be equal: '%s', '%s'",
|
|
filepath.Join(d, f), deLinked)
|
|
}
|
|
return ConfirmedDir(d), f, nil
|
|
}
|
|
|
|
// Exists returns true if os.Stat succeeds.
|
|
func (realFS) Exists(name string) bool {
|
|
_, err := os.Stat(name)
|
|
return err == nil
|
|
}
|
|
|
|
// Glob returns the list of matching files
|
|
func (realFS) Glob(pattern string) ([]string, error) {
|
|
return filepath.Glob(pattern)
|
|
}
|
|
|
|
// IsDir delegates to os.Stat and FileInfo.IsDir
|
|
func (realFS) IsDir(name string) bool {
|
|
info, err := os.Stat(name)
|
|
if err != nil {
|
|
return false
|
|
}
|
|
return info.IsDir()
|
|
}
|
|
|
|
// ReadFile delegates to ioutil.ReadFile.
|
|
func (realFS) ReadFile(name string) ([]byte, error) { return ioutil.ReadFile(name) }
|
|
|
|
// WriteFile delegates to ioutil.WriteFile with read/write permissions.
|
|
func (realFS) WriteFile(name string, c []byte) error {
|
|
return ioutil.WriteFile(name, c, 0666)
|
|
}
|