55 lines
2 KiB
Go
55 lines
2 KiB
Go
package winio
|
|
|
|
import (
|
|
"os"
|
|
"syscall"
|
|
"unsafe"
|
|
)
|
|
|
|
//sys getFileInformationByHandleEx(h syscall.Handle, class uint32, buffer *byte, size uint32) (err error) = GetFileInformationByHandleEx
|
|
//sys setFileInformationByHandle(h syscall.Handle, class uint32, buffer *byte, size uint32) (err error) = SetFileInformationByHandle
|
|
|
|
const (
|
|
fileBasicInfo = 0
|
|
fileIDInfo = 0x12
|
|
)
|
|
|
|
// FileBasicInfo contains file access time and file attributes information.
|
|
type FileBasicInfo struct {
|
|
CreationTime, LastAccessTime, LastWriteTime, ChangeTime syscall.Filetime
|
|
FileAttributes uintptr // includes padding
|
|
}
|
|
|
|
// GetFileBasicInfo retrieves times and attributes for a file.
|
|
func GetFileBasicInfo(f *os.File) (*FileBasicInfo, error) {
|
|
bi := &FileBasicInfo{}
|
|
if err := getFileInformationByHandleEx(syscall.Handle(f.Fd()), fileBasicInfo, (*byte)(unsafe.Pointer(bi)), uint32(unsafe.Sizeof(*bi))); err != nil {
|
|
return nil, &os.PathError{Op: "GetFileInformationByHandleEx", Path: f.Name(), Err: err}
|
|
}
|
|
return bi, nil
|
|
}
|
|
|
|
// SetFileBasicInfo sets times and attributes for a file.
|
|
func SetFileBasicInfo(f *os.File, bi *FileBasicInfo) error {
|
|
if err := setFileInformationByHandle(syscall.Handle(f.Fd()), fileBasicInfo, (*byte)(unsafe.Pointer(bi)), uint32(unsafe.Sizeof(*bi))); err != nil {
|
|
return &os.PathError{Op: "SetFileInformationByHandle", Path: f.Name(), Err: err}
|
|
}
|
|
return 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 := getFileInformationByHandleEx(syscall.Handle(f.Fd()), fileIDInfo, (*byte)(unsafe.Pointer(fileID)), uint32(unsafe.Sizeof(*fileID))); err != nil {
|
|
return nil, &os.PathError{Op: "GetFileInformationByHandleEx", Path: f.Name(), Err: err}
|
|
}
|
|
return fileID, nil
|
|
}
|