func (file *file) close() error {
if file == nil {
return syscall.EINVAL
}
if file.isdir() && file.dirinfo.isempty {
// "special" empty directories
return nil
}
if file.fd == syscall.InvalidHandle {
return syscall.EINVAL
}
var e error
if file.isdir() {
e = syscall.FindClose(syscall.Handle(file.fd))
} else {
e = syscall.CloseHandle(syscall.Handle(file.fd))
}
var err error
if e != nil {
err = &PathError{"close", file.name, e}
}
file.fd = syscall.InvalidHandle // so it can't be closed again
// no need for a finalizer anymore
runtime.SetFinalizer(file, nil)
return err
}
// normBase retruns the last element of path.
func normBase(path string) (string, error) {
p, err := syscall.UTF16PtrFromString(path)
if err != nil {
return "", err
}
var data syscall.Win32finddata
h, err := syscall.FindFirstFile(p, &data)
if err != nil {
return "", err
}
syscall.FindClose(h)
return syscall.UTF16ToString(data.FileName[:]), nil
}
// Close closes the File, rendering it unusable for I/O.
// It returns an Error, if any.
func (file *File) Close() Error {
if file == nil || file.fd < 0 {
return EINVAL
}
var e int
if file.isdir() {
e = syscall.FindClose(syscall.Handle(file.fd))
} else {
e = syscall.CloseHandle(syscall.Handle(file.fd))
}
var err Error
if e != 0 {
err = &PathError{"close", file.name, Errno(e)}
}
file.fd = syscall.InvalidHandle // so it can't be closed again
// no need for a finalizer anymore
runtime.SetFinalizer(file, nil)
return err
}
// Lstat returns the FileInfo structure describing the named file.
// If the file is a symbolic link, the returned FileInfo
// describes the symbolic link. Lstat makes no attempt to follow the link.
// If there is an error, it will be of type *PathError.
func Lstat(name string) (FileInfo, error) {
if len(name) == 0 {
return nil, &PathError{"Lstat", name, syscall.Errno(syscall.ERROR_PATH_NOT_FOUND)}
}
if name == DevNull {
return &devNullStat, nil
}
fs := &fileStat{name: basename(name)}
namep, e := syscall.UTF16PtrFromString(fixLongPath(name))
if e != nil {
return nil, &PathError{"Lstat", name, e}
}
e = syscall.GetFileAttributesEx(namep, syscall.GetFileExInfoStandard, (*byte)(unsafe.Pointer(&fs.sys)))
if e != nil {
if e != windows.ERROR_SHARING_VIOLATION {
return nil, &PathError{"GetFileAttributesEx", name, e}
}
// try FindFirstFile now that GetFileAttributesEx failed
var fd syscall.Win32finddata
h, e2 := syscall.FindFirstFile(namep, &fd)
if e2 != nil {
return nil, &PathError{"FindFirstFile", name, e}
}
syscall.FindClose(h)
fs.sys.FileAttributes = fd.FileAttributes
fs.sys.CreationTime = fd.CreationTime
fs.sys.LastAccessTime = fd.LastAccessTime
fs.sys.LastWriteTime = fd.LastWriteTime
fs.sys.FileSizeHigh = fd.FileSizeHigh
fs.sys.FileSizeLow = fd.FileSizeLow
}
fs.path = name
if !isAbs(fs.path) {
fs.path, e = syscall.FullPath(fs.path)
if e != nil {
return nil, e
}
}
return fs, nil
}
func TestWin32finddata(t *testing.T) {
dir, err := ioutil.TempDir("", "go-build")
if err != nil {
t.Fatalf("failed to create temp directory: %v", err)
}
defer os.RemoveAll(dir)
path := filepath.Join(dir, "long_name.and_extension")
f, err := os.Create(path)
if err != nil {
t.Fatalf("failed to create %v: %v", path, err)
}
f.Close()
type X struct {
fd syscall.Win32finddata
got byte
pad [10]byte // to protect ourselves
}
var want byte = 2 // it is unlikely to have this character in the filename
x := X{got: want}
pathp, _ := syscall.UTF16PtrFromString(path)
h, err := syscall.FindFirstFile(pathp, &(x.fd))
if err != nil {
t.Fatalf("FindFirstFile failed: %v", err)
}
err = syscall.FindClose(h)
if err != nil {
t.Fatalf("FindClose failed: %v", err)
}
if x.got != want {
t.Fatalf("memory corruption: want=%d got=%d", want, x.got)
}
}
func (this *FileInfo) close() {
syscall.FindClose(this.handle)
}
