minio/cmd/os-readdir_windows.go

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// +build windows
/*
* MinIO Cloud Storage, (C) 2016-2020 MinIO, Inc.
*
* 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 cmd
import (
"os"
"strings"
"syscall"
)
// Return all the entries at the directory dirPath.
func readDir(dirPath string) (entries []string, err error) {
return readDirN(dirPath, -1)
}
// readDir applies the filter function on each entries at dirPath, doesn't recurse into
// the directory itself.
func readDirFilterFn(dirPath string, filter func(name string, typ os.FileMode) error) error {
d, err := os.Open(dirPath)
if err != nil {
// File is really not found.
if os.IsNotExist(err) {
return errFileNotFound
}
// File path cannot be verified since one of the parents is a file.
if strings.Contains(err.Error(), "not a directory") {
return errFileNotFound
}
return err
}
defer d.Close()
st, err := d.Stat()
if err != nil {
return err
}
// Not a directory return error.
if !st.IsDir() {
return errFileAccessDenied
}
data := &syscall.Win32finddata{}
for {
e := syscall.FindNextFile(syscall.Handle(d.Fd()), data)
if e != nil {
if e == syscall.ERROR_NO_MORE_FILES {
break
} else {
err = &os.PathError{
Op: "FindNextFile",
Path: dirPath,
Err: e,
}
return err
}
}
name := syscall.UTF16ToString(data.FileName[0:])
if name == "" || name == "." || name == ".." { // Useless names
continue
}
if data.FileAttributes&syscall.FILE_ATTRIBUTE_REPARSE_POINT != 0 {
continue
}
var typ os.FileMode = 0 // regular file
if data.FileAttributes&syscall.FILE_ATTRIBUTE_DIRECTORY != 0 {
typ = os.ModeDir
}
if err = filter(name, typ); err == errDoneForNow {
// filtering requested to return by caller.
return nil
}
}
return err
}
// Return N entries at the directory dirPath. If count is -1, return all entries
func readDirN(dirPath string, count int) (entries []string, err error) {
d, err := os.Open(dirPath)
if err != nil {
// File is really not found.
if os.IsNotExist(err) {
return nil, errFileNotFound
}
// File path cannot be verified since one of the parents is a file.
if strings.Contains(err.Error(), "not a directory") {
return nil, errFileNotFound
}
return nil, err
}
defer d.Close()
st, err := d.Stat()
if err != nil {
return nil, err
}
// Not a directory return error.
if !st.IsDir() {
return nil, errFileNotFound
}
data := &syscall.Win32finddata{}
for count != 0 {
err = syscall.FindNextFile(syscall.Handle(d.Fd()), data)
if err != nil {
if err == syscall.ERROR_NO_MORE_FILES {
break
} else {
return nil, &os.PathError{
Op: "FindNextFile",
Path: dirPath,
Err: err,
}
}
}
name := syscall.UTF16ToString(data.FileName[0:])
if name == "" || name == "." || name == ".." { // Useless names
continue
}
switch {
case data.FileAttributes&syscall.FILE_ATTRIBUTE_REPARSE_POINT != 0:
continue
case data.FileAttributes&syscall.FILE_ATTRIBUTE_DIRECTORY != 0:
entries = append(entries, name+SlashSeparator)
default:
entries = append(entries, name)
}
count--
}
return entries, nil
}