mirror of https://github.com/docker/cli.git
107 lines
3.5 KiB
Go
107 lines
3.5 KiB
Go
//go:build windows
|
|
// +build windows
|
|
|
|
package winio
|
|
|
|
import (
|
|
"os"
|
|
"runtime"
|
|
"unsafe"
|
|
|
|
"golang.org/x/sys/windows"
|
|
)
|
|
|
|
// FileBasicInfo contains file access time and file attributes information.
|
|
type FileBasicInfo struct {
|
|
CreationTime, LastAccessTime, LastWriteTime, ChangeTime windows.Filetime
|
|
FileAttributes uint32
|
|
_ uint32 // padding
|
|
}
|
|
|
|
// alignedFileBasicInfo is a FileBasicInfo, but aligned to uint64 by containing
|
|
// uint64 rather than windows.Filetime. Filetime contains two uint32s. uint64
|
|
// alignment is necessary to pass this as FILE_BASIC_INFO.
|
|
type alignedFileBasicInfo struct {
|
|
CreationTime, LastAccessTime, LastWriteTime, ChangeTime uint64
|
|
FileAttributes uint32
|
|
_ uint32 // padding
|
|
}
|
|
|
|
// GetFileBasicInfo retrieves times and attributes for a file.
|
|
func GetFileBasicInfo(f *os.File) (*FileBasicInfo, error) {
|
|
bi := &alignedFileBasicInfo{}
|
|
if err := windows.GetFileInformationByHandleEx(
|
|
windows.Handle(f.Fd()),
|
|
windows.FileBasicInfo,
|
|
(*byte)(unsafe.Pointer(bi)),
|
|
uint32(unsafe.Sizeof(*bi)),
|
|
); err != nil {
|
|
return nil, &os.PathError{Op: "GetFileInformationByHandleEx", Path: f.Name(), Err: err}
|
|
}
|
|
runtime.KeepAlive(f)
|
|
// Reinterpret the alignedFileBasicInfo as a FileBasicInfo so it matches the
|
|
// public API of this module. The data may be unnecessarily aligned.
|
|
return (*FileBasicInfo)(unsafe.Pointer(bi)), nil
|
|
}
|
|
|
|
// SetFileBasicInfo sets times and attributes for a file.
|
|
func SetFileBasicInfo(f *os.File, bi *FileBasicInfo) error {
|
|
// Create an alignedFileBasicInfo based on a FileBasicInfo. The copy is
|
|
// suitable to pass to GetFileInformationByHandleEx.
|
|
biAligned := *(*alignedFileBasicInfo)(unsafe.Pointer(bi))
|
|
if err := windows.SetFileInformationByHandle(
|
|
windows.Handle(f.Fd()),
|
|
windows.FileBasicInfo,
|
|
(*byte)(unsafe.Pointer(&biAligned)),
|
|
uint32(unsafe.Sizeof(biAligned)),
|
|
); err != nil {
|
|
return &os.PathError{Op: "SetFileInformationByHandle", Path: f.Name(), Err: err}
|
|
}
|
|
runtime.KeepAlive(f)
|
|
return nil
|
|
}
|
|
|
|
// FileStandardInfo contains extended information for the file.
|
|
// FILE_STANDARD_INFO in WinBase.h
|
|
// https://docs.microsoft.com/en-us/windows/win32/api/winbase/ns-winbase-file_standard_info
|
|
type FileStandardInfo struct {
|
|
AllocationSize, EndOfFile int64
|
|
NumberOfLinks uint32
|
|
DeletePending, Directory bool
|
|
}
|
|
|
|
// GetFileStandardInfo retrieves ended information for the file.
|
|
func GetFileStandardInfo(f *os.File) (*FileStandardInfo, error) {
|
|
si := &FileStandardInfo{}
|
|
if err := windows.GetFileInformationByHandleEx(windows.Handle(f.Fd()),
|
|
windows.FileStandardInfo,
|
|
(*byte)(unsafe.Pointer(si)),
|
|
uint32(unsafe.Sizeof(*si))); err != nil {
|
|
return nil, &os.PathError{Op: "GetFileInformationByHandleEx", Path: f.Name(), Err: err}
|
|
}
|
|
runtime.KeepAlive(f)
|
|
return si, nil
|
|
}
|
|
|
|
// FileIDInfo contains the volume serial number and file ID for a file. This pair should be
|
|
// unique on a system.
|
|
type FileIDInfo struct {
|
|
VolumeSerialNumber uint64
|
|
FileID [16]byte
|
|
}
|
|
|
|
// GetFileID retrieves the unique (volume, file ID) pair for a file.
|
|
func GetFileID(f *os.File) (*FileIDInfo, error) {
|
|
fileID := &FileIDInfo{}
|
|
if err := windows.GetFileInformationByHandleEx(
|
|
windows.Handle(f.Fd()),
|
|
windows.FileIdInfo,
|
|
(*byte)(unsafe.Pointer(fileID)),
|
|
uint32(unsafe.Sizeof(*fileID)),
|
|
); err != nil {
|
|
return nil, &os.PathError{Op: "GetFileInformationByHandleEx", Path: f.Name(), Err: err}
|
|
}
|
|
runtime.KeepAlive(f)
|
|
return fileID, nil
|
|
}
|