exec

type ExitError struct {
	*os.ProcessState

	// Stderr holds a subset of the standard error output from the
	// Cmd.Output method if standard error was not otherwise being
	// collected.
	//
	// If the error output is long, Stderr may contain only a prefix
	// and suffix of the output, with the middle replaced with
	// text about the number of omitted bytes.
	//
	// Stderr is provided for debugging, for inclusion in error messages.
	// Users with other needs should redirect Cmd.Stderr as needed.
	Stderr []byte
}