child/child.go
func New(i *NewInput) (*Child, error) {
	if i == nil {
		i = new(NewInput)
	}

	if len(i.Command) == 0 {
		return nil, ErrMissingCommand
	}

	child := &Child{
		stdin:        i.Stdin,
		stdout:       i.Stdout,
		stderr:       i.Stderr,
		command:      i.Command,
		args:         i.Args,
		env:          i.Env,
		timeout:      i.Timeout,
		reloadSignal: i.ReloadSignal,
		killSignal:   i.KillSignal,
		killTimeout:  i.KillTimeout,
		splay:        i.Splay,
		stopCh:       make(chan struct{}, 1),
	}

	return child, nil
}
func New(i *NewInput) (*Child, error) {
	if i == nil {
		i = new(NewInput)
	}

	if len(i.Command) == 0 {
		return nil, ErrMissingCommand
	}

	child := &Child{
		stdin:        i.Stdin,
		stdout:       i.Stdout,
		stderr:       i.Stderr,
		command:      i.Command,
		args:         i.Args,
		env:          i.Env,
		timeout:      i.Timeout,
		reloadSignal: i.ReloadSignal,
		killSignal:   i.KillSignal,
		killTimeout:  i.KillTimeout,
		splay:        i.Splay,
		stopCh:       make(chan struct{}, 1),
	}

	return child, nil
}
// New creates a new child process for management with high-level APIs for
// sending signals to the child process, restarting the child process, and
// gracefully terminating the child process.