Golang reexec.Init函數代碼示例

func init() {
	reexec.Register("namespaced", namespaced)

	if reexec.Init() {
		os.Exit(0)
	}
}

func main() {
	if reexec.Init() {
		return
	}

	// Set terminal emulation based on platform as required.
	stdin, stdout, stderr := term.StdStreams()

	logrus.SetOutput(stderr)

	flag.Merge(flag.CommandLine, clientFlags.FlagSet, commonFlags.FlagSet)

	flag.Usage = func() {
		fmt.Fprint(os.Stdout, "Usage: docker [OPTIONS] COMMAND [arg...]\n"+daemonUsage+"       docker [ -h | --help | -v | --version ]\n\n")
		fmt.Fprint(os.Stdout, "A self-sufficient runtime for containers.\n\nOptions:\n")

		flag.CommandLine.SetOutput(os.Stdout)
		flag.PrintDefaults()

		help := "\nCommands:\n"

		for _, cmd := range dockerCommands {
			help += fmt.Sprintf("    %-10.10s%s\n", cmd.name, cmd.description)
		}

		help += "\nRun 'docker COMMAND --help' for more information on a command."
		fmt.Fprintf(os.Stdout, "%s\n", help)
	}

	flag.Parse()

	if *flVersion {
		showVersion()
		return
	}

	clientCli := client.NewDockerCli(stdin, stdout, stderr, clientFlags)
	// TODO: remove once `-d` is retired
	handleGlobalDaemonFlag()

	if *flHelp {
		// if global flag --help is present, regardless of what other options and commands there are,
		// just print the usage.
		flag.Usage()
		return
	}

	c := cli.New(clientCli, daemonCli)
	if err := c.Run(flag.Args()...); err != nil {
		if sterr, ok := err.(cli.StatusError); ok {
			if sterr.Status != "" {
				fmt.Fprintln(os.Stderr, sterr.Status)
				os.Exit(1)
			}
			os.Exit(sterr.StatusCode)
		}
		fmt.Fprintln(os.Stderr, err)
		os.Exit(1)
	}
}

func main() {
	fmt.Println("test")
	if reexec.Init() {
		return
	}

}

func TestMain(m *testing.M) {
	reexec.Register("allocate", allocate)
	if reexec.Init() {
		return
	}
	os.Exit(m.Run())
}

func TestMain(m *testing.M) {
	reexec.Register("enqueue", reexecEnqueue)
	if reexec.Init() {
		return
	}
	os.Exit(m.Run())
}

func TestMain(m *testing.M) {
	if reexec.Init() {
		return
	}

	if err := createController(); err != nil {
		os.Exit(1)
	}
	option := options.Generic{
		"EnableIPForwarding": true,
	}

	genericOption := make(map[string]interface{})
	genericOption[netlabel.GenericData] = option

	err := controller.ConfigureNetworkDriver(bridgeNetType, genericOption)
	if err != nil {
		//m.Fatal(err)
		os.Exit(1)
	}

	libnetwork.SetTestDataStore(controller, datastore.NewCustomDataStore(datastore.NewMockStore()))

	os.Exit(m.Run())
}

func init() {
	// Do not sure chroot to speed run time and allow archive
	// errors or hangs to be debugged directly from the test process.
	untar = archive.UntarUncompressed
	graphdriver.ApplyUncompressedLayer = archive.ApplyUncompressedLayer

	reexec.Init()
}

func init() {
	reexec.Init()
	if dockerBin := os.Getenv("DOCKER_BINARY"); dockerBin != "" {
		dockerBinary = dockerBin
	}
	var err error
	dockerBinary, err = exec.LookPath(dockerBinary)
	if err != nil {
		fmt.Printf("ERROR: couldn't resolve full path to the Docker binary (%v)", err)
		os.Exit(1)
	}
	if registryImage := os.Getenv("REGISTRY_IMAGE"); registryImage != "" {
		registryImageName = registryImage
	}
	if registry := os.Getenv("REGISTRY_URL"); registry != "" {
		privateRegistryURL = registry
	}
	workingDirectory, _ = os.Getwd()

	// Deterministically working out the environment in which CI is running
	// to evaluate whether the daemon is local or remote is not possible through
	// a build tag.
	//
	// For example Windows to Linux CI under Jenkins tests the 64-bit
	// Windows binary build with the daemon build tag, but calls a remote
	// Linux daemon.
	//
	// We can't just say if Windows then assume the daemon is local as at
	// some point, we will be testing the Windows CLI against a Windows daemon.
	//
	// Similarly, it will be perfectly valid to also run CLI tests from
	// a Linux CLI (built with the daemon tag) against a Windows daemon.
	if len(os.Getenv("DOCKER_REMOTE_DAEMON")) > 0 {
		isLocalDaemon = false
	} else {
		isLocalDaemon = true
	}

	// TODO Windows CI. This are incorrect and need fixing into
	// platform specific pieces.
	// This is only used for a tests with local daemon true (Linux-only today)
	// default is "/var/lib/docker", but we'll try and ask the
	// /info endpoint for the specific root dir
	dockerBasePath = "/var/lib/docker"
	type Info struct {
		DockerRootDir string
	}
	var i Info
	status, b, err := sockRequest("GET", "/info", nil)
	if err == nil && status == 200 {
		if err = json.Unmarshal(b, &i); err == nil {
			dockerBasePath = i.DockerRootDir
		}
	}
	volumesConfigPath = dockerBasePath + "/volumes"
	containerStoragePath = dockerBasePath + "/containers"
}

func Test(t *testing.T) {
	reexec.Init() // This is required for external graphdriver tests

	if !isLocalDaemon {
		fmt.Println("INFO: Testing against a remote daemon")
	} else {
		fmt.Println("INFO: Testing against a local daemon")
	}

	check.TestingT(t)
}

func main() {
	if reexec.Init() {
		return
	}

	// Set terminal emulation based on platform as required.
	_, stdout, stderr := term.StdStreams()

	logrus.SetOutput(stderr)

	flag.Merge(flag.CommandLine, daemonCli.commonFlags.FlagSet)

	flag.Usage = func() {
		fmt.Fprint(stdout, "Usage: dockerd [ --help | -v | --version ]\n\n")
		fmt.Fprint(stdout, "A self-sufficient runtime for containers.\n\nOptions:\n")

		flag.CommandLine.SetOutput(stdout)
		flag.PrintDefaults()
	}
	flag.CommandLine.ShortUsage = func() {
		fmt.Fprint(stderr, "\nUsage:\tdockerd [OPTIONS]\n")
	}

	if err := flag.CommandLine.ParseFlags(os.Args[1:], false); err != nil {
		os.Exit(1)
	}

	if *flVersion {
		showVersion()
		return
	}

	if *flHelp {
		// if global flag --help is present, regardless of what other options and commands there are,
		// just print the usage.
		flag.Usage()
		return
	}

	// On Windows, this may be launching as a service or with an option to
	// register the service.
	stop, err := initService()
	if err != nil {
		logrus.Fatal(err)
	}

	if !stop {
		err = daemonCli.start()
		notifyShutdown(err)
		if err != nil {
			logrus.Fatal(err)
		}
	}
}

func main() {
	if reexec.Init() {
		return
	}

	_, stdout, stderr := term.StdStreams()
	logrus.SetOutput(stderr)

	err := dnetApp(stdout, stderr)
	if err != nil {
		os.Exit(1)
	}
}

func init() {
	var err error

	reexec.Init() // This is required for external graphdriver tests

	testEnv, err = environment.New()
	if err != nil {
		fmt.Println(err)
		os.Exit(1)
	}

	assignGlobalVariablesFromTestEnv(testEnv)
}

func TestMain(m *testing.M) {
	if reexec.Init() {
		return
	}

	if err := createController(); err != nil {
		logrus.Errorf("Error creating controller: %v", err)
		os.Exit(1)
	}

	x := m.Run()
	controller.Stop()
	os.Exit(x)
}

func Test(t *testing.T) {
	reexec.Init() // This is required for external graphdriver tests

	if !isLocalDaemon {
		fmt.Println("INFO: Testing against a remote daemon")
	} else {
		fmt.Println("INFO: Testing against a local daemon")
	}

	if daemonPlatform == "linux" {
		ensureFrozenImagesLinux(t)
	}
	check.TestingT(t)
}

func main() {
	registerCmd("/init", osInit.MainInit)
	registerCmd(config.SYSINIT_BIN, sysinit.Main)
	registerCmd("/usr/bin/dockerlaunch", dockerlaunch.Main)
	registerCmd("/usr/bin/user-docker", userdocker.Main)
	registerCmd("/usr/bin/system-docker", systemdocker.Main)
	registerCmd("/sbin/poweroff", power.PowerOff)
	registerCmd("/sbin/reboot", power.Reboot)
	registerCmd("/sbin/halt", power.Halt)
	registerCmd("/sbin/shutdown", power.Main)
	registerCmd("/usr/bin/respawn", respawn.Main)
	registerCmd("/usr/bin/ros", control.Main)
	registerCmd("/usr/bin/cloud-init", cloudinit.Main)
	registerCmd("/usr/sbin/netconf", network.Main)
	registerCmd("/usr/sbin/wait-for-network", waitfornetwork.Main)
	registerCmd("/usr/sbin/wait-for-docker", wait.Main)

	if !reexec.Init() {
		reexec.Register(os.Args[0], control.Main)
		if !reexec.Init() {
			log.Fatalf("Failed to find an entry point for %s", os.Args[0])
		}
	}
}