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basicfs.go
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basicfs.go
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// Copyright (C) 2016 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at https://mozilla.org/MPL/2.0/.
package fs
import (
"errors"
"os"
"time"
)
// The BasicFilesystem implements all aspects by delegating to package os.
type BasicFilesystem struct {
}
func NewBasicFilesystem() *BasicFilesystem {
return new(BasicFilesystem)
}
func (f *BasicFilesystem) Chmod(name string, mode FileMode) error {
return os.Chmod(name, os.FileMode(mode))
}
func (f *BasicFilesystem) Chtimes(name string, atime time.Time, mtime time.Time) error {
return os.Chtimes(name, atime, mtime)
}
func (f *BasicFilesystem) Mkdir(name string, perm FileMode) error {
return os.Mkdir(name, os.FileMode(perm))
}
func (f *BasicFilesystem) Lstat(name string) (FileInfo, error) {
fi, err := underlyingLstat(name)
if err != nil {
return nil, err
}
return fsFileInfo{fi}, err
}
func (f *BasicFilesystem) Remove(name string) error {
return os.Remove(name)
}
func (f *BasicFilesystem) Rename(oldpath, newpath string) error {
return os.Rename(oldpath, newpath)
}
func (f *BasicFilesystem) Stat(name string) (FileInfo, error) {
fi, err := os.Stat(name)
if err != nil {
return nil, err
}
return fsFileInfo{fi}, err
}
func (f *BasicFilesystem) DirNames(name string) ([]string, error) {
fd, err := os.OpenFile(name, os.O_RDONLY, 0777)
if err != nil {
return nil, err
}
defer fd.Close()
names, err := fd.Readdirnames(-1)
if err != nil {
return nil, err
}
return names, nil
}
func (f *BasicFilesystem) Open(name string) (File, error) {
fd, err := os.Open(name)
if err != nil {
return nil, err
}
return fsFile{fd}, err
}
func (f *BasicFilesystem) Create(name string) (File, error) {
fd, err := os.Create(name)
if err != nil {
return nil, err
}
return fsFile{fd}, err
}
func (f *BasicFilesystem) Walk(root string, walkFn WalkFunc) error {
// implemented in WalkFilesystem
return errors.New("not implemented")
}
// fsFile implements the fs.File interface on top of an os.File
type fsFile struct {
*os.File
}
func (f fsFile) Stat() (FileInfo, error) {
info, err := f.File.Stat()
if err != nil {
return nil, err
}
return fsFileInfo{info}, nil
}
// fsFileInfo implements the fs.FileInfo interface on top of an os.FileInfo.
type fsFileInfo struct {
os.FileInfo
}
func (e fsFileInfo) Mode() FileMode {
return FileMode(e.FileInfo.Mode())
}
func (e fsFileInfo) IsRegular() bool {
return e.FileInfo.Mode().IsRegular()
}
func (e fsFileInfo) IsSymlink() bool {
return e.FileInfo.Mode()&os.ModeSymlink == os.ModeSymlink
}