pkg os, const SEEK_SET int
pkg os, func Chdir(string) error
pkg os, func Chmod(string, FileMode) error
pkg os, func Chown(string, int, int) error
pkg os, func Chtimes(string, time.Time, time.Time) error
pkg os, func Clearenv()
pkg os, func Create(string) (*File, error)
pkg os, func Environ() []string
pkg os, func Exit(int)
pkg os, func Expand(string, func(string) string) string
pkg os, func ExpandEnv(string) string