readdirName readdirMode = iota
	readdirDirEntry
	readdirFileInfo
)

// Readdir reads the contents of the directory associated with file and
// returns a slice of up to n [FileInfo] values, as would be returned
// by [Lstat], in directory order. Subsequent calls on the same file will yield
// further FileInfos.
//
// If n > 0, Readdir returns at most n FileInfo structures. In this case, if

	byID   = "/dev/disk/by-id/"
)

func (handler *osIOHandler) ReadDir(dirname string) ([]os.FileInfo, error) {
	return ioutil.ReadDir(dirname)
}
func (handler *osIOHandler) Lstat(name string) (os.FileInfo, error) {
	return os.Lstat(name)
}
func (handler *osIOHandler) EvalSymlinks(path string) (string, error) {
	return filepath.EvalSymlinks(path)
}
func (handler *osIOHandler) WriteFile(filename string, data []byte, perm os.FileMode) error {

}

// DiskUsage gets disk usage of specified path.
func DiskUsage(path string) (UsageInfo, error) {
	var usage UsageInfo
	info, err := os.Lstat(path)
	if err != nil {
		return usage, err
	}

	usage.Bytes, err = diskUsage(path, info)
	return usage, err
}

func diskUsage(currPath string, info os.FileInfo) (int64, error) {
	var size int64

	}

	// Simple case: if Remove works, we're done.
	err := Remove(path)
	if err == nil || IsNotExist(err) {
		return nil
	}

	// Otherwise, is this a directory we need to recurse into?
	dir, serr := Lstat(path)
	if serr != nil {
		if serr, ok := serr.(*PathError); ok && (IsNotExist(serr.Err) || serr.Err == syscall.ENOTDIR) {
			return nil
		}
		return serr
	}
	if !dir.IsDir() {

// File represents an open file descriptor.
//
// The methods of File are safe for concurrent use.
type File struct {
	*file // os specific
}

// A FileInfo describes a file and is returned by [Stat] and [Lstat].
type FileInfo = fs.FileInfo

// A FileMode represents a file's mode and permission bits.
// The bits have the same definition on all systems, so that
// information about files can be moved from one system

			continue
		}
		if !os.SameFile(fi, fi1) {
			t.Errorf("%q should point to %q", link, dir)
			continue
		}

		fi2, err := os.Lstat(link)
		if err != nil {
			t.Errorf("failed to lstat link %v: %v", link, err)
			continue
		}
		var wantType fs.FileMode
		if test.isMountPoint && winsymlink.Value() != "0" {

// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package cmd

import (
	"io"
	"os"
	"syscall"
)

func access(name string) error {
	_, err := os.Lstat(name)
	return err
}

func osMkdirAll(dirPath string, perm os.FileMode, _ string) error {
	// baseDir is not honored in plan9 and solaris platforms.
	return os.MkdirAll(dirPath, perm)
}

		if len(dest) > filepathlite.VolumeNameLen(dest) && !os.IsPathSeparator(dest[len(dest)-1]) {
			dest += pathSeparator
		}

		dest += path[start:end]

		// Resolve symlink.

		fi, err := os.Lstat(dest)
		if err != nil {
			return "", err
		}

		if fi.Mode()&fs.ModeSymlink == 0 {
			if !fi.Mode().IsDir() && end < len(path) {
				return "", syscall.ENOTDIR
			}
			continue
		}

		return ""
	}
	sysPath := "/sys/block/"
	if dirs, err := io.ReadDir(sysPath); err == nil {
		for _, f := range dirs {
			name := f.Name()
			if strings.HasPrefix(name, "dm-") {
				if _, err1 := io.Lstat(sysPath + name + "/slaves/" + disk); err1 == nil {
					return "/dev/" + name
				}
			}
		}
	}
	return ""
}

package os

import (
	"internal/filepathlite"
	"internal/godebug"
	"internal/syscall/windows"
	"sync"
	"syscall"
	"time"
	"unsafe"
)

// A fileStat is the implementation of FileInfo returned by Stat and Lstat.
type fileStat struct {
	name string

	// from ByHandleFileInformation, Win32FileAttributeData, Win32finddata, and GetFileInformationByHandleEx
	FileAttributes uint32
	CreationTime   syscall.Filetime