pkg os, type SyscallError struct, Syscall string
pkg os, var Args []string
pkg os, var ErrExist error
pkg os, var ErrInvalid error
pkg os, var ErrNotExist error
pkg os, var ErrPermission error
pkg os, var Interrupt Signal
pkg os, var Kill Signal
pkg os, var Stderr *File
pkg os, var Stdin *File
pkg os, var Stdout *File
pkg os/exec, func Command(string, ...string) *Cmd
pkg os/exec, func LookPath(string) (string, error)