pkg os, func ReadDir(string) ([]fs.DirEntry, error)
pkg os, func ReadFile(string) ([]uint8, error)
pkg os, func SameFile(fs.FileInfo, fs.FileInfo) bool
pkg os, func Stat(string) (fs.FileInfo, error)
pkg os, func WriteFile(string, []uint8, fs.FileMode) error
pkg os, method (*File) Chmod(fs.FileMode) error
pkg os, method (*File) ReadDir(int) ([]fs.DirEntry, error)
pkg os, method (*File) Readdir(int) ([]fs.FileInfo, error)

pkg io/ioutil, func ReadFile(string) ([]uint8, error)
pkg io/ioutil, func TempDir(string, string) (string, error)
pkg io/ioutil, func TempFile(string, string) (*os.File, error)
pkg io/ioutil, func WriteFile(string, []uint8, os.FileMode) error
pkg io/ioutil, var Discard io.Writer
pkg log, const Ldate ideal-int
pkg log, const Llongfile ideal-int
pkg log, const Lmicroseconds ideal-int
pkg log, const Lshortfile ideal-int