mirror of
https://gitea.com/Sirherobrine23/tea.git
synced 2024-08-21 17:57:24 +00:00
update go min version Update Vendors: * code.gitea.io/gitea-vet v0.2.0 -> v0.2.1 * code.gitea.io/sdk/gitea v0.13.0 -> v0.13.1 * github.com/AlecAivazis/survey v2.1.1 -> v2.2.2 * github.com/adrg/xdg v0.2.1 -> v0.2.2 * github.com/araddon/dateparse d820a6159ab1 -> 8aadafed4dc4 * github.com/go-git/go-git v5.1.0 -> v5.2.0 * github.com/muesli/termenv v0.7.2 -> v0.7.4 * github.com/stretchr/testify v1.5.1 -> v1.6.1 * github.com/urfave/cli v2.2.0 -> v2.3.0 Co-authored-by: 6543 <6543@obermui.de> Reviewed-on: https://gitea.com/gitea/tea/pulls/250 Reviewed-by: Andrew Thornton <art27@cantab.net> Reviewed-by: mrsdizzie <info@mrsdizzie.com> Co-Authored-By: 6543 <6543@noreply.gitea.io> Co-Committed-By: 6543 <6543@noreply.gitea.io>
281 lines
7.9 KiB
Go
281 lines
7.9 KiB
Go
// +build windows
|
|
|
|
package winio
|
|
|
|
import (
|
|
"encoding/binary"
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
"io/ioutil"
|
|
"os"
|
|
"runtime"
|
|
"syscall"
|
|
"unicode/utf16"
|
|
)
|
|
|
|
//sys backupRead(h syscall.Handle, b []byte, bytesRead *uint32, abort bool, processSecurity bool, context *uintptr) (err error) = BackupRead
|
|
//sys backupWrite(h syscall.Handle, b []byte, bytesWritten *uint32, abort bool, processSecurity bool, context *uintptr) (err error) = BackupWrite
|
|
|
|
const (
|
|
BackupData = uint32(iota + 1)
|
|
BackupEaData
|
|
BackupSecurity
|
|
BackupAlternateData
|
|
BackupLink
|
|
BackupPropertyData
|
|
BackupObjectId
|
|
BackupReparseData
|
|
BackupSparseBlock
|
|
BackupTxfsData
|
|
)
|
|
|
|
const (
|
|
StreamSparseAttributes = uint32(8)
|
|
)
|
|
|
|
const (
|
|
WRITE_DAC = 0x40000
|
|
WRITE_OWNER = 0x80000
|
|
ACCESS_SYSTEM_SECURITY = 0x1000000
|
|
)
|
|
|
|
// BackupHeader represents a backup stream of a file.
|
|
type BackupHeader struct {
|
|
Id uint32 // The backup stream ID
|
|
Attributes uint32 // Stream attributes
|
|
Size int64 // The size of the stream in bytes
|
|
Name string // The name of the stream (for BackupAlternateData only).
|
|
Offset int64 // The offset of the stream in the file (for BackupSparseBlock only).
|
|
}
|
|
|
|
type win32StreamId struct {
|
|
StreamId uint32
|
|
Attributes uint32
|
|
Size uint64
|
|
NameSize uint32
|
|
}
|
|
|
|
// BackupStreamReader reads from a stream produced by the BackupRead Win32 API and produces a series
|
|
// of BackupHeader values.
|
|
type BackupStreamReader struct {
|
|
r io.Reader
|
|
bytesLeft int64
|
|
}
|
|
|
|
// NewBackupStreamReader produces a BackupStreamReader from any io.Reader.
|
|
func NewBackupStreamReader(r io.Reader) *BackupStreamReader {
|
|
return &BackupStreamReader{r, 0}
|
|
}
|
|
|
|
// Next returns the next backup stream and prepares for calls to Read(). It skips the remainder of the current stream if
|
|
// it was not completely read.
|
|
func (r *BackupStreamReader) Next() (*BackupHeader, error) {
|
|
if r.bytesLeft > 0 {
|
|
if s, ok := r.r.(io.Seeker); ok {
|
|
// Make sure Seek on io.SeekCurrent sometimes succeeds
|
|
// before trying the actual seek.
|
|
if _, err := s.Seek(0, io.SeekCurrent); err == nil {
|
|
if _, err = s.Seek(r.bytesLeft, io.SeekCurrent); err != nil {
|
|
return nil, err
|
|
}
|
|
r.bytesLeft = 0
|
|
}
|
|
}
|
|
if _, err := io.Copy(ioutil.Discard, r); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
var wsi win32StreamId
|
|
if err := binary.Read(r.r, binary.LittleEndian, &wsi); err != nil {
|
|
return nil, err
|
|
}
|
|
hdr := &BackupHeader{
|
|
Id: wsi.StreamId,
|
|
Attributes: wsi.Attributes,
|
|
Size: int64(wsi.Size),
|
|
}
|
|
if wsi.NameSize != 0 {
|
|
name := make([]uint16, int(wsi.NameSize/2))
|
|
if err := binary.Read(r.r, binary.LittleEndian, name); err != nil {
|
|
return nil, err
|
|
}
|
|
hdr.Name = syscall.UTF16ToString(name)
|
|
}
|
|
if wsi.StreamId == BackupSparseBlock {
|
|
if err := binary.Read(r.r, binary.LittleEndian, &hdr.Offset); err != nil {
|
|
return nil, err
|
|
}
|
|
hdr.Size -= 8
|
|
}
|
|
r.bytesLeft = hdr.Size
|
|
return hdr, nil
|
|
}
|
|
|
|
// Read reads from the current backup stream.
|
|
func (r *BackupStreamReader) Read(b []byte) (int, error) {
|
|
if r.bytesLeft == 0 {
|
|
return 0, io.EOF
|
|
}
|
|
if int64(len(b)) > r.bytesLeft {
|
|
b = b[:r.bytesLeft]
|
|
}
|
|
n, err := r.r.Read(b)
|
|
r.bytesLeft -= int64(n)
|
|
if err == io.EOF {
|
|
err = io.ErrUnexpectedEOF
|
|
} else if r.bytesLeft == 0 && err == nil {
|
|
err = io.EOF
|
|
}
|
|
return n, err
|
|
}
|
|
|
|
// BackupStreamWriter writes a stream compatible with the BackupWrite Win32 API.
|
|
type BackupStreamWriter struct {
|
|
w io.Writer
|
|
bytesLeft int64
|
|
}
|
|
|
|
// NewBackupStreamWriter produces a BackupStreamWriter on top of an io.Writer.
|
|
func NewBackupStreamWriter(w io.Writer) *BackupStreamWriter {
|
|
return &BackupStreamWriter{w, 0}
|
|
}
|
|
|
|
// WriteHeader writes the next backup stream header and prepares for calls to Write().
|
|
func (w *BackupStreamWriter) WriteHeader(hdr *BackupHeader) error {
|
|
if w.bytesLeft != 0 {
|
|
return fmt.Errorf("missing %d bytes", w.bytesLeft)
|
|
}
|
|
name := utf16.Encode([]rune(hdr.Name))
|
|
wsi := win32StreamId{
|
|
StreamId: hdr.Id,
|
|
Attributes: hdr.Attributes,
|
|
Size: uint64(hdr.Size),
|
|
NameSize: uint32(len(name) * 2),
|
|
}
|
|
if hdr.Id == BackupSparseBlock {
|
|
// Include space for the int64 block offset
|
|
wsi.Size += 8
|
|
}
|
|
if err := binary.Write(w.w, binary.LittleEndian, &wsi); err != nil {
|
|
return err
|
|
}
|
|
if len(name) != 0 {
|
|
if err := binary.Write(w.w, binary.LittleEndian, name); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
if hdr.Id == BackupSparseBlock {
|
|
if err := binary.Write(w.w, binary.LittleEndian, hdr.Offset); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
w.bytesLeft = hdr.Size
|
|
return nil
|
|
}
|
|
|
|
// Write writes to the current backup stream.
|
|
func (w *BackupStreamWriter) Write(b []byte) (int, error) {
|
|
if w.bytesLeft < int64(len(b)) {
|
|
return 0, fmt.Errorf("too many bytes by %d", int64(len(b))-w.bytesLeft)
|
|
}
|
|
n, err := w.w.Write(b)
|
|
w.bytesLeft -= int64(n)
|
|
return n, err
|
|
}
|
|
|
|
// BackupFileReader provides an io.ReadCloser interface on top of the BackupRead Win32 API.
|
|
type BackupFileReader struct {
|
|
f *os.File
|
|
includeSecurity bool
|
|
ctx uintptr
|
|
}
|
|
|
|
// NewBackupFileReader returns a new BackupFileReader from a file handle. If includeSecurity is true,
|
|
// Read will attempt to read the security descriptor of the file.
|
|
func NewBackupFileReader(f *os.File, includeSecurity bool) *BackupFileReader {
|
|
r := &BackupFileReader{f, includeSecurity, 0}
|
|
return r
|
|
}
|
|
|
|
// Read reads a backup stream from the file by calling the Win32 API BackupRead().
|
|
func (r *BackupFileReader) Read(b []byte) (int, error) {
|
|
var bytesRead uint32
|
|
err := backupRead(syscall.Handle(r.f.Fd()), b, &bytesRead, false, r.includeSecurity, &r.ctx)
|
|
if err != nil {
|
|
return 0, &os.PathError{"BackupRead", r.f.Name(), err}
|
|
}
|
|
runtime.KeepAlive(r.f)
|
|
if bytesRead == 0 {
|
|
return 0, io.EOF
|
|
}
|
|
return int(bytesRead), nil
|
|
}
|
|
|
|
// Close frees Win32 resources associated with the BackupFileReader. It does not close
|
|
// the underlying file.
|
|
func (r *BackupFileReader) Close() error {
|
|
if r.ctx != 0 {
|
|
backupRead(syscall.Handle(r.f.Fd()), nil, nil, true, false, &r.ctx)
|
|
runtime.KeepAlive(r.f)
|
|
r.ctx = 0
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// BackupFileWriter provides an io.WriteCloser interface on top of the BackupWrite Win32 API.
|
|
type BackupFileWriter struct {
|
|
f *os.File
|
|
includeSecurity bool
|
|
ctx uintptr
|
|
}
|
|
|
|
// NewBackupFileWriter returns a new BackupFileWriter from a file handle. If includeSecurity is true,
|
|
// Write() will attempt to restore the security descriptor from the stream.
|
|
func NewBackupFileWriter(f *os.File, includeSecurity bool) *BackupFileWriter {
|
|
w := &BackupFileWriter{f, includeSecurity, 0}
|
|
return w
|
|
}
|
|
|
|
// Write restores a portion of the file using the provided backup stream.
|
|
func (w *BackupFileWriter) Write(b []byte) (int, error) {
|
|
var bytesWritten uint32
|
|
err := backupWrite(syscall.Handle(w.f.Fd()), b, &bytesWritten, false, w.includeSecurity, &w.ctx)
|
|
if err != nil {
|
|
return 0, &os.PathError{"BackupWrite", w.f.Name(), err}
|
|
}
|
|
runtime.KeepAlive(w.f)
|
|
if int(bytesWritten) != len(b) {
|
|
return int(bytesWritten), errors.New("not all bytes could be written")
|
|
}
|
|
return len(b), nil
|
|
}
|
|
|
|
// Close frees Win32 resources associated with the BackupFileWriter. It does not
|
|
// close the underlying file.
|
|
func (w *BackupFileWriter) Close() error {
|
|
if w.ctx != 0 {
|
|
backupWrite(syscall.Handle(w.f.Fd()), nil, nil, true, false, &w.ctx)
|
|
runtime.KeepAlive(w.f)
|
|
w.ctx = 0
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// OpenForBackup opens a file or directory, potentially skipping access checks if the backup
|
|
// or restore privileges have been acquired.
|
|
//
|
|
// If the file opened was a directory, it cannot be used with Readdir().
|
|
func OpenForBackup(path string, access uint32, share uint32, createmode uint32) (*os.File, error) {
|
|
winPath, err := syscall.UTF16FromString(path)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
h, err := syscall.CreateFile(&winPath[0], access, share, nil, createmode, syscall.FILE_FLAG_BACKUP_SEMANTICS|syscall.FILE_FLAG_OPEN_REPARSE_POINT, 0)
|
|
if err != nil {
|
|
err = &os.PathError{Op: "open", Path: path, Err: err}
|
|
return nil, err
|
|
}
|
|
return os.NewFile(uintptr(h), path), nil
|
|
}
|