func (daemon *Daemon) populateCommand(c *Container, env []string) error {
	var en *execdriver.Network
	if !c.Config.NetworkDisabled {
		en = &execdriver.Network{}
		if !daemon.execDriver.SupportsHooks() || c.hostConfig.NetworkMode.IsHost() {
			en.NamespacePath = c.NetworkSettings.SandboxKey
		}

		if c.hostConfig.NetworkMode.IsContainer() {
			nc, err := daemon.getNetworkedContainer(c.ID, c.hostConfig.NetworkMode.ConnectedContainer())
			if err != nil {
				return err
			}
			en.ContainerID = nc.ID
		}
	}

	ipc := &execdriver.Ipc{}
	var err error
	c.ShmPath, err = c.shmPath()
	if err != nil {
		return err
	}

	c.MqueuePath, err = c.mqueuePath()
	if err != nil {
		return err
	}

	if c.hostConfig.IpcMode.IsContainer() {
		ic, err := daemon.getIpcContainer(c)
		if err != nil {
			return err
		}
		ipc.ContainerID = ic.ID
		c.ShmPath = ic.ShmPath
		c.MqueuePath = ic.MqueuePath
	} else {
		ipc.HostIpc = c.hostConfig.IpcMode.IsHost()
		if ipc.HostIpc {
			if _, err := os.Stat("/dev/shm"); err != nil {
				return fmt.Errorf("/dev/shm is not mounted, but must be for --ipc=host")
			}
			if _, err := os.Stat("/dev/mqueue"); err != nil {
				return fmt.Errorf("/dev/mqueue is not mounted, but must be for --ipc=host")
			}
			c.ShmPath = "/dev/shm"
			c.MqueuePath = "/dev/mqueue"
		}
	}

	pid := &execdriver.Pid{}
	pid.HostPid = c.hostConfig.PidMode.IsHost()

	uts := &execdriver.UTS{
		HostUTS: c.hostConfig.UTSMode.IsHost(),
	}

	// Build lists of devices allowed and created within the container.
	var userSpecifiedDevices []*configs.Device
	for _, deviceMapping := range c.hostConfig.Devices {
		devs, err := getDevicesFromPath(deviceMapping)
		if err != nil {
			return err
		}

		userSpecifiedDevices = append(userSpecifiedDevices, devs...)
	}

	allowedDevices := mergeDevices(configs.DefaultAllowedDevices, userSpecifiedDevices)

	autoCreatedDevices := mergeDevices(configs.DefaultAutoCreatedDevices, userSpecifiedDevices)

	var rlimits []*ulimit.Rlimit
	ulimits := c.hostConfig.Ulimits

	// Merge ulimits with daemon defaults
	ulIdx := make(map[string]*ulimit.Ulimit)
	for _, ul := range ulimits {
		ulIdx[ul.Name] = ul
	}
	for name, ul := range daemon.configStore.Ulimits {
		if _, exists := ulIdx[name]; !exists {
			ulimits = append(ulimits, ul)
		}
	}

	weightDevices, err := getBlkioWeightDevices(c.hostConfig)
	if err != nil {
		return err
	}

	for _, limit := range ulimits {
		rl, err := limit.GetRlimit()
		if err != nil {
			return err
		}
		rlimits = append(rlimits, rl)
	}

//.........这里部分代码省略.........

func populateCommand(c *Container, env []string) error {
	var (
		en      *execdriver.Network
		context = make(map[string][]string)
	)
	context["process_label"] = []string{c.GetProcessLabel()}
	context["mount_label"] = []string{c.GetMountLabel()}

	en = &execdriver.Network{
		Mtu:       c.daemon.config.Mtu,
		Interface: nil,
	}

	parts := strings.SplitN(string(c.hostConfig.NetworkMode), ":", 2)
	switch parts[0] {
	case "none":
	case "host":
		en.HostNetworking = true
	case "bridge", "": // empty string to support existing containers
		if !c.Config.NetworkDisabled {
			network := c.NetworkSettings
			en.Interface = &execdriver.NetworkInterface{
				Gateway:     network.Gateway,
				Bridge:      network.Bridge,
				IPAddress:   network.IPAddress,
				IPPrefixLen: network.IPPrefixLen,
			}
		}
	case "container":
		nc, err := c.getNetworkedContainer()
		if err != nil {
			return err
		}
		en.ContainerID = nc.ID
	default:
		return fmt.Errorf("invalid network mode: %s", c.hostConfig.NetworkMode)
	}

	// Build lists of devices allowed and created within the container.
	userSpecifiedDevices := make([]*devices.Device, len(c.hostConfig.Devices))
	for i, deviceMapping := range c.hostConfig.Devices {
		device, err := devices.GetDevice(deviceMapping.PathOnHost, deviceMapping.CgroupPermissions)
		device.Path = deviceMapping.PathInContainer
		if err != nil {
			return fmt.Errorf("error gathering device information while adding custom device %s", err)
		}
		userSpecifiedDevices[i] = device
	}
	allowedDevices := append(devices.DefaultAllowedDevices, userSpecifiedDevices...)

	autoCreatedDevices := append(devices.DefaultAutoCreatedDevices, userSpecifiedDevices...)

	// TODO: this can be removed after lxc-conf is fully deprecated
	mergeLxcConfIntoOptions(c.hostConfig, context)

	resources := &execdriver.Resources{
		Memory:     c.Config.Memory,
		MemorySwap: c.Config.MemorySwap,
		CpuShares:  c.Config.CpuShares,
		Cpuset:     c.Config.Cpuset,
	}
	c.command = &execdriver.Command{
		ID:                 c.ID,
		Privileged:         c.hostConfig.Privileged,
		Rootfs:             c.RootfsPath(),
		InitPath:           "/.dockerinit",
		Entrypoint:         c.Path,
		Arguments:          c.Args,
		WorkingDir:         c.Config.WorkingDir,
		Network:            en,
		Tty:                c.Config.Tty,
		User:               c.Config.User,
		Config:             context,
		Resources:          resources,
		AllowedDevices:     allowedDevices,
		AutoCreatedDevices: autoCreatedDevices,
		CapAdd:             c.hostConfig.CapAdd,
		CapDrop:            c.hostConfig.CapDrop,
	}
	c.command.SysProcAttr = &syscall.SysProcAttr{Setsid: true}
	c.command.Env = env
	return nil
}

func (daemon *Daemon) populateCommand(c *container.Container, env []string) error {
	var en *execdriver.Network
	if !c.Config.NetworkDisabled {
		en = &execdriver.Network{}
		if !daemon.execDriver.SupportsHooks() || c.HostConfig.NetworkMode.IsHost() {
			en.NamespacePath = c.NetworkSettings.SandboxKey
		}

		if c.HostConfig.NetworkMode.IsContainer() {
			nc, err := daemon.getNetworkedContainer(c.ID, c.HostConfig.NetworkMode.ConnectedContainer())
			if err != nil {
				return err
			}
			en.ContainerID = nc.ID
		}
	}

	ipc := &execdriver.Ipc{}
	var err error
	c.ShmPath, err = c.ShmResourcePath()
	if err != nil {
		return err
	}

	c.MqueuePath, err = c.MqueueResourcePath()
	if err != nil {
		return err
	}

	if c.HostConfig.IpcMode.IsContainer() {
		ic, err := daemon.getIpcContainer(c)
		if err != nil {
			return err
		}
		ipc.ContainerID = ic.ID
		c.ShmPath = ic.ShmPath
		c.MqueuePath = ic.MqueuePath
	} else {
		ipc.HostIpc = c.HostConfig.IpcMode.IsHost()
		if ipc.HostIpc {
			if _, err := os.Stat("/dev/shm"); err != nil {
				return fmt.Errorf("/dev/shm is not mounted, but must be for --ipc=host")
			}
			if _, err := os.Stat("/dev/mqueue"); err != nil {
				return fmt.Errorf("/dev/mqueue is not mounted, but must be for --ipc=host")
			}
			c.ShmPath = "/dev/shm"
			c.MqueuePath = "/dev/mqueue"
		}
	}

	pid := &execdriver.Pid{}
	pid.HostPid = c.HostConfig.PidMode.IsHost()

	uts := &execdriver.UTS{
		HostUTS: c.HostConfig.UTSMode.IsHost(),
	}

	// Build lists of devices allowed and created within the container.
	var userSpecifiedDevices []*configs.Device
	for _, deviceMapping := range c.HostConfig.Devices {
		devs, err := getDevicesFromPath(deviceMapping)
		if err != nil {
			return err
		}

		userSpecifiedDevices = append(userSpecifiedDevices, devs...)
	}

	allowedDevices := mergeDevices(configs.DefaultAllowedDevices, userSpecifiedDevices)

	autoCreatedDevices := mergeDevices(configs.DefaultAutoCreatedDevices, userSpecifiedDevices)

	var rlimits []*units.Rlimit
	ulimits := c.HostConfig.Ulimits

	// Merge ulimits with daemon defaults
	ulIdx := make(map[string]*units.Ulimit)
	for _, ul := range ulimits {
		ulIdx[ul.Name] = ul
	}
	for name, ul := range daemon.configStore.Ulimits {
		if _, exists := ulIdx[name]; !exists {
			ulimits = append(ulimits, ul)
		}
	}

	weightDevices, err := getBlkioWeightDevices(c.HostConfig)
	if err != nil {
		return err
	}

	readBpsDevice, err := getBlkioReadBpsDevices(c.HostConfig)
	if err != nil {
		return err
	}

	writeBpsDevice, err := getBlkioWriteBpsDevices(c.HostConfig)
	if err != nil {
		return err
//.........这里部分代码省略.........