package daemon
 
 import (

 	"fmt"

 	"runtime"

 	"github.com/docker/docker/runconfig"
 )
 

 func (daemon *Daemon) ContainerStart(name string, hostConfig *runconfig.HostConfig) error {

 	container, err := daemon.Get(name)
 	if err != nil {

 		return err

 	}
 

 	if container.IsPaused() {

 		return fmt.Errorf("Cannot start a paused container, try unpause instead.")

 	}
 

 	if container.IsRunning() {

 		return fmt.Errorf("Container already started")

 	}
 

 	if _, err = daemon.verifyContainerSettings(hostConfig, nil); err != nil {

 		return err
 	}
 

 	// Windows does not have the backwards compatibilty issue here.
 	if runtime.GOOS != "windows" {
 		// This is kept for backward compatibility - hostconfig should be passed when
 		// creating a container, not during start.
 		if hostConfig != nil {
 			if err := daemon.setHostConfig(container, hostConfig); err != nil {
 				return err
 			}
 		}
 	} else {
 		if hostConfig != nil {
 			return fmt.Errorf("Supplying a hostconfig on start is not supported. It should be supplied on create")

 		}
 	}

 	if err := container.Start(); err != nil {

 		return fmt.Errorf("Cannot start container %s: %s", name, err)

 	}

 	return nil

 }