Golang mflag.Args函数代码示例

func main() {
	ignoreIfaceNames := make(stringList)

	mflag.Var(&ignoreIfaceNames, []string{"-ignore-iface"}, "name of interface to ignore)")
	mflag.Parse()

	if len(mflag.Args()) < 1 {
		fmt.Fprintln(os.Stderr, "usage: netcheck [--ignore-iface <iface-name>] network-cidr")
		os.Exit(1)
	}

	cidrStr := mflag.Args()[0]
	addr, ipnet, err := net.ParseCIDR(cidrStr)
	if err != nil {
		fatal(err)
	}
	if ipnet.IP.Equal(addr) {
		err = weavenet.CheckNetworkFree(ipnet, ignoreIfaceNames)
	} else {
		err = weavenet.CheckAddressOverlap(addr, ignoreIfaceNames)
	}
	if err != nil {
		fatal(err)
	}
	os.Exit(0)
}

// checkRepoList gets the list of repositories to process from the command line
// and from the repoList file.
func checkRepoList(initial bool) (updates bool) {
	newList := make(map[collector.RepoType]bool)

	// check repositories specified on the command line
	if len(flag.Args()) > 1 {
		for _, repo := range flag.Args()[1:] {
			newList[collector.RepoType(repo)] = true
			if initial {
				updates = true
			}
		}
	}
	// check repositories specified in the repoList file. Ignore file read errors.
	data, err := ioutil.ReadFile(*repoList)
	if err != nil {
		if initial {
			blog.Info("Repolist: " + *repoList + " not specified")
		}
	} else {
		arr := strings.Split(string(data), "\n")
		for _, line := range arr {
			// skip over comments and whitespace
			arr := strings.Split(line, "#")
			repo := arr[0]
			repotrim := strings.TrimSpace(repo)
			if repotrim != "" {
				r := collector.RepoType(repotrim)
				newList[r] = true
				if _, ok := collector.ReposToProcess[r]; !ok {
					updates = true
				}
			}
		}
	}

	if len(newList) == 0 {
		collector.ReposToProcess = newList
		return
	}
	collector.ReposToProcess = newList
	if searchTerm := collector.NeedRegistrySearch(); searchTerm != "" {
		config.FilterRepos = false
	} else {
		config.FilterRepos = true
	}
	if updates {
		blog.Info("Limiting collection to the following repos:")
		for repo := range newList {
			blog.Info(repo)
		}
	}
	return
}

// TODO: remove once `-d` is retired
func handleGlobalDaemonFlag() {
	// This block makes sure that if the deprecated daemon flag `--daemon` is absent,
	// then all daemon-specific flags are absent as well.
	if !*flDaemon && daemonFlags != nil {
		flag.CommandLine.Visit(func(fl *flag.Flag) {
			for _, name := range fl.Names {
				name := strings.TrimPrefix(name, "#")
				if daemonFlags.Lookup(name) != nil {
					// daemon flag was NOT specified, but daemon-specific flags were
					// so let's error out
					fmt.Fprintf(os.Stderr, "docker: the daemon flag '-%s' must follow the 'docker daemon' command.\n", name)
					os.Exit(1)
				}
			}
		})
	}

	if *flDaemon {
		if *flHelp {
			// We do not show the help output here, instead, we tell the user about the new daemon command,
			// because the help output is so long they would not see the warning anyway.
			fmt.Fprintln(os.Stderr, "Please use 'docker daemon --help' instead.")
			os.Exit(0)
		}
		daemonCli.(*DaemonCli).CmdDaemon(flag.Args()...)
		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() {
	mflag.BoolVar(&useScheduler, []string{"scheduler"}, false, "Use scheduler to distribute tests across shards")
	mflag.BoolVar(&runParallel, []string{"parallel"}, false, "Run tests in parallel on hosts where possible")
	mflag.BoolVar(&verbose, []string{"v"}, false, "Print output from all tests (Also enabled via DEBUG=1)")
	mflag.StringVar(&schedulerHost, []string{"scheduler-host"}, defaultSchedulerHost, "Hostname of scheduler.")
	mflag.Parse()

	if len(os.Getenv("DEBUG")) > 0 {
		verbose = true
	}

	tests, err := getTests(mflag.Args())
	if err != nil {
		fmt.Printf("Error parsing tests: %v\n", err)
		os.Exit(1)
	}

	hosts := strings.Fields(os.Getenv("HOSTS"))
	maxHosts := len(hosts)
	if maxHosts == 0 {
		fmt.Print("No HOSTS specified.\n")
		os.Exit(1)
	}

	var errored bool
	if runParallel {
		errored = parallel(tests, hosts)
	} else {
		errored = sequential(tests, hosts)
	}

	if errored {
		os.Exit(1)
	}
}

func main() {
	mflag.BoolVar(&useScheduler, []string{"scheduler"}, false, "Use scheduler to distribute tests across shards")
	mflag.BoolVar(&runParallel, []string{"parallel"}, false, "Run tests in parallel on hosts where possible")
	mflag.Parse()

	tests, err := getTests(mflag.Args())
	if err != nil {
		fmt.Printf("Error parsing tests: %v\n", err)
		os.Exit(1)
	}

	hosts := strings.Fields(os.Getenv("HOSTS"))
	maxHosts := len(hosts)
	if maxHosts == 0 {
		fmt.Print("No HOSTS specified.\n")
		os.Exit(1)
	}

	var errored bool
	if runParallel {
		errored = parallel(tests, hosts)
	} else {
		errored = sequential(tests, hosts)
	}

	if errored {
		os.Exit(1)
	}
}

func dnetCommand(stdout, stderr io.Writer) error {
	flag.Parse()

	if *flHelp {
		flag.Usage()
		return nil
	}

	if *flLogLevel != "" {
		lvl, err := logrus.ParseLevel(*flLogLevel)
		if err != nil {
			fmt.Fprintf(stderr, "Unable to parse logging level: %s\n", *flLogLevel)
			return err
		}
		logrus.SetLevel(lvl)
	} else {
		logrus.SetLevel(logrus.InfoLevel)
	}

	if *flDebug {
		logrus.SetLevel(logrus.DebugLevel)
	}

	if *flHost == "" {
		defaultHost := os.Getenv("DNET_HOST")
		if defaultHost == "" {
			// TODO : Add UDS support
			defaultHost = fmt.Sprintf("tcp://%s:%d", DefaultHTTPHost, DefaultHTTPPort)
		}
		*flHost = defaultHost
	}

	dc, err := newDnetConnection(*flHost)
	if err != nil {
		if *flDaemon {
			logrus.Error(err)
		} else {
			fmt.Fprint(stderr, err)
		}
		return err
	}

	if *flDaemon {
		err := dc.dnetDaemon()
		if err != nil {
			logrus.Errorf("dnet Daemon exited with an error : %v", err)
		}
		return err
	}

	cli := client.NewNetworkCli(stdout, stderr, dc.httpCall)
	if err := cli.Cmd("dnet", flag.Args()...); err != nil {
		fmt.Fprintln(stderr, err)
		return err
	}
	return nil
}

func main() {
	if h {
		flag.PrintDefaults()
	} else {
		fmt.Printf("s/#hidden/-string: %s\n", str)
		fmt.Printf("b: %t\n", b)
		fmt.Printf("-bool: %t\n", b2)
		fmt.Printf("s/#hidden/-string(via lookup): %s\n", flag.Lookup("s").Value.String())
		fmt.Printf("ARGS: %v\n", flag.Args())
	}
}

func main() {
	fmt.Print("Hello, world\n")

	// Define global flag here

	// end global flag definition

	flag.Usage = func() {
		fmt.Fprint(os.Stdout, "Usage: docking [OPTIONS] COMMAND [arg...]\n       docking [ --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 dockingCommands {
			help += fmt.Sprintf("    %-10.10s%s\n", cmd.Name, cmd.Description)
		}

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

	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
	}

	clientCli := client.NewDockingCli(os.Stdin, os.Stdout, os.Stderr, clientFlags)

	c := cli.New(clientCli)
	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 (dcli *DockerfCli) CmdContainer(args ...string) error {

	flag.CommandLine.Parse(args)

	if *flVersion {
		showVersion()
		os.Exit(1)
	}

	if *flDaemon {
		if *flHelp {
			flag.Usage()
			os.Exit(1)
		}
		fmt.Printf("dockerf container does not support daemon.\n")
		os.Exit(1)
	}

	if *flMachine == "" {
		app := path.Base(os.Args[0])
		cmd := "container"
		fmt.Printf("%s: \"%s\" requires --machine flag for manage any container. See '%s %s --help'. \n", app, cmd, app, cmd)
		os.Exit(1)
	}

	cluster := ""
	if *flSwarm {
		cluster = "swarm"
	}
	rewriteTLSFlags(dcli, *flMachine, cluster)

	cli := newDockerClient()
	if err := cli.Cmd(flag.Args()...); err != nil {
		if sterr, ok := err.(client.StatusError); ok {
			if sterr.Status != "" {
				fmt.Fprintln(cli.Err(), sterr.Status)
				os.Exit(1)
			}
			os.Exit(sterr.StatusCode)
		}
		fmt.Fprintln(cli.Err(), err)
		os.Exit(1)
	}
	return nil
}

// doFlags defines the cmdline Usage string and parses flag options.
func doFlags() {
	flag.Usage = func() {
		fmt.Fprintf(os.Stderr, "  Usage: %s [OPTIONS] REGISTRY REPO [REPO...]\n", os.Args[0])
		fmt.Fprintf(os.Stderr, "\n  REGISTRY:\n")
		fmt.Fprintf(os.Stderr, "\tURL of your Docker registry; use index.docker.io for Docker Hub, use local.host to collect images from local Docker host\n")
		fmt.Fprintf(os.Stderr, "\n  REPO:\n")
		fmt.Fprintf(os.Stderr, "\tOne or more repos to gather info about; if no repo is specified Collector will gather info on *all* repos in the Registry\n")
		fmt.Fprintf(os.Stderr, "\n  Environment variables:\n")
		fmt.Fprintf(os.Stderr, "\tCOLLECTOR_DIR:   (Required) Directory that contains the \"data\" folder with Collector default scripts, e.g., $GOPATH/src/github.com/banyanops/collector\n")
		fmt.Fprintf(os.Stderr, "\tCOLLECTOR_ID:    ID provided by Banyan web interface to register Collector with the Banyan service\n")
		fmt.Fprintf(os.Stderr, "\tBANYAN_HOST_DIR: Host directory mounted into Collector/Target containers where results are stored (default: $HOME/.banyan)\n")
		fmt.Fprintf(os.Stderr, "\tBANYAN_DIR:      (Specify only in Dockerfile) Directory in the Collector container where host directory BANYAN_HOST_DIR is mounted\n")
		fmt.Fprintf(os.Stderr, "\tDOCKER_{HOST,CERT_PATH,TLS_VERIFY}: If set, e.g., by docker-machine, then they take precedence over --dockerProto and --dockerAddr\n")
		printExampleUsage()
		fmt.Fprintf(os.Stderr, "  Options:\n")
		flag.PrintDefaults()
	}
	flag.Parse()
	if config.COLLECTORDIR() == "" {
		flag.Usage()
		os.Exit(except.ErrorExitStatus)
	}
	if len(flag.Args()) < 1 {
		flag.Usage()
		os.Exit(except.ErrorExitStatus)
	}
	if *dockerProto != "unix" && *dockerProto != "tcp" {
		flag.Usage()
		os.Exit(except.ErrorExitStatus)
	}
	requiredDirs := []string{config.BANYANDIR(), filepath.Dir(*imageList), filepath.Dir(*repoList), *config.BanyanOutDir, collector.DefaultScriptsDir, collector.UserScriptsDir, collector.BinDir}
	for _, dir := range requiredDirs {
		blog.Debug("Creating directory: " + dir)
		err := fsutil.CreateDirIfNotExist(dir)
		if err != nil {
			except.Fail(err, ": Error in creating a required directory: ", dir)
		}
	}
	collector.RegistrySpec = flag.Arg(0)
	// EqualFold: case insensitive comparison
	if strings.EqualFold(flag.Arg(0), "local.host") {
		collector.LocalHost = true
	}
	//nextMaxImages = *maxImages
}

func main() {
	flag.Usage = func() {
		fmt.Fprint(os.Stdout, "Usage: gofind [OPTIONS] COMMAND [arg...]\ngofind [ --help | -v | --version ]\n")
		flag.CommandLine.SetOutput(os.Stdout)
		flag.PrintDefaults()
	}
	if h {
		flag.Usage()
	} else {
		fmt.Printf("Path: %s\n", path)
		fmt.Printf("Name: %s\n", name)
		fmt.Printf("ARGS: %v\n", flag.Args())
		err := finder(path, name)
		if err != nil {
			fmt.Println(err)
			return
		}

	}
}

// TODO: remove once `-d` is retired
func handleGlobalDaemonFlag() {
	// This block makes sure that if the deprecated daemon flag `--daemon` is absent,
	// then all daemon-specific flags are absent as well.
	if !*flDaemon && daemonFlags != nil {
		flag.CommandLine.Visit(func(fl *flag.Flag) {
			for _, name := range fl.Names {
				name := strings.TrimPrefix(name, "#")
				if daemonFlags.Lookup(name) != nil {
					// daemon flag was NOT specified, but daemon-specific flags were
					// so let's error out
					fmt.Fprintf(os.Stderr, "docker: the daemon flag '-%s' must follow the 'docker daemon' command.\n", name)
					os.Exit(1)
				}
			}
		})
	}

	if *flDaemon {
		daemonCli.(*DaemonCli).CmdDaemon(flag.Args()...)
		os.Exit(0)
	}
}

//.........这里部分代码省略.........
	}

	if *flLogLevel != "" {
		lvl, err := log.ParseLevel(*flLogLevel)
		if err != nil {
			log.Fatalf("Unable to parse logging level: %s", *flLogLevel)
		}
		initLogging(lvl)
	} else {
		initLogging(log.InfoLevel)
	}

	// -D, --debug, -l/--log-level=debug processing
	// When/if -D is removed this block can be deleted
	if *flDebug {
		os.Setenv("DEBUG", "1")
		initLogging(log.DebugLevel)
	}

	if len(flHosts) == 0 {
		defaultHost := os.Getenv("DOCKER_HOST")
		if defaultHost == "" || *flDaemon {
			// If we do not have a host, default to unix socket
			defaultHost = fmt.Sprintf("unix://%s", api.DEFAULTUNIXSOCKET)
		}
		defaultHost, err := api.ValidateHost(defaultHost)
		if err != nil {
			log.Fatal(err)
		}
		flHosts = append(flHosts, defaultHost)
	}

	setDefaultConfFlag(flTrustKey, defaultTrustKeyFile)

	if *flDaemon {
		mainDaemon()
		return
	}

	if len(flHosts) > 1 {
		log.Fatal("Please specify only one -H")
	}
	protoAddrParts := strings.SplitN(flHosts[0], "://", 2)

	var (
		cli       *client.DockerCli
		tlsConfig tls.Config
	)
	tlsConfig.InsecureSkipVerify = true

	// Regardless of whether the user sets it to true or false, if they
	// specify --tlsverify at all then we need to turn on tls
	if flag.IsSet("-tlsverify") {
		*flTls = true
	}

	// If we should verify the server, we need to load a trusted ca
	if *flTlsVerify {
		certPool := x509.NewCertPool()
		file, err := ioutil.ReadFile(*flCa)
		if err != nil {
			log.Fatalf("Couldn't read ca cert %s: %s", *flCa, err)
		}
		certPool.AppendCertsFromPEM(file)
		tlsConfig.RootCAs = certPool
		tlsConfig.InsecureSkipVerify = false
	}

	// If tls is enabled, try to load and send client certificates
	if *flTls || *flTlsVerify {
		_, errCert := os.Stat(*flCert)
		_, errKey := os.Stat(*flKey)
		if errCert == nil && errKey == nil {
			*flTls = true
			cert, err := tls.LoadX509KeyPair(*flCert, *flKey)
			if err != nil {
				log.Fatalf("Couldn't load X509 key pair: %s. Key encrypted?", err)
			}
			tlsConfig.Certificates = []tls.Certificate{cert}
		}
		// Avoid fallback to SSL protocols < TLS1.0
		tlsConfig.MinVersion = tls.VersionTLS10
	}

	if *flTls || *flTlsVerify {
		cli = client.NewDockerCli(os.Stdin, os.Stdout, os.Stderr, *flTrustKey, protoAddrParts[0], protoAddrParts[1], &tlsConfig)
	} else {
		cli = client.NewDockerCli(os.Stdin, os.Stdout, os.Stderr, *flTrustKey, protoAddrParts[0], protoAddrParts[1], nil)
	}

	if err := cli.Cmd(flag.Args()...); err != nil {
		if sterr, ok := err.(*utils.StatusError); ok {
			if sterr.Status != "" {
				log.Println(sterr.Status)
			}
			os.Exit(sterr.StatusCode)
		}
		log.Fatal(err)
	}
}

func main() {
	procs := runtime.NumCPU()
	// packet sniffing can block an OS thread, so we need one thread
	// for that plus at least one more.
	if procs < 2 {
		procs = 2
	}
	runtime.GOMAXPROCS(procs)

	var (
		config                    weave.Config
		justVersion               bool
		protocolMinVersion        int
		ifaceName                 string
		routerName                string
		nickName                  string
		password                  string
		pktdebug                  bool
		logLevel                  string
		prof                      string
		bufSzMB                   int
		noDiscovery               bool
		httpAddr                  string
		iprangeCIDR               string
		ipsubnetCIDR              string
		peerCount                 int
		dockerAPI                 string
		peers                     []string
		noDNS                     bool
		dnsDomain                 string
		dnsListenAddress          string
		dnsTTL                    int
		dnsClientTimeout          time.Duration
		dnsEffectiveListenAddress string
		iface                     *net.Interface
	)

	mflag.BoolVar(&justVersion, []string{"#version", "-version"}, false, "print version and exit")
	mflag.IntVar(&config.Port, []string{"#port", "-port"}, weave.Port, "router port")
	mflag.IntVar(&protocolMinVersion, []string{"-min-protocol-version"}, weave.ProtocolMinVersion, "minimum weave protocol version")
	mflag.StringVar(&ifaceName, []string{"#iface", "-iface"}, "", "name of interface to capture/inject from (disabled if blank)")
	mflag.StringVar(&routerName, []string{"#name", "-name"}, "", "name of router (defaults to MAC of interface)")
	mflag.StringVar(&nickName, []string{"#nickname", "-nickname"}, "", "nickname of peer (defaults to hostname)")
	mflag.StringVar(&password, []string{"#password", "-password"}, "", "network password")
	mflag.StringVar(&logLevel, []string{"-log-level"}, "info", "logging level (debug, info, warning, error)")
	mflag.BoolVar(&pktdebug, []string{"#pktdebug", "#-pktdebug", "-pkt-debug"}, false, "enable per-packet debug logging")
	mflag.StringVar(&prof, []string{"#profile", "-profile"}, "", "enable profiling and write profiles to given path")
	mflag.IntVar(&config.ConnLimit, []string{"#connlimit", "#-connlimit", "-conn-limit"}, 30, "connection limit (0 for unlimited)")
	mflag.BoolVar(&noDiscovery, []string{"#nodiscovery", "#-nodiscovery", "-no-discovery"}, false, "disable peer discovery")
	mflag.IntVar(&bufSzMB, []string{"#bufsz", "-bufsz"}, 8, "capture buffer size in MB")
	mflag.StringVar(&httpAddr, []string{"#httpaddr", "#-httpaddr", "-http-addr"}, fmt.Sprintf(":%d", weave.HTTPPort), "address to bind HTTP interface to (disabled if blank, absolute path indicates unix domain socket)")
	mflag.StringVar(&iprangeCIDR, []string{"#iprange", "#-iprange", "-ipalloc-range"}, "", "IP address range reserved for automatic allocation, in CIDR notation")
	mflag.StringVar(&ipsubnetCIDR, []string{"#ipsubnet", "#-ipsubnet", "-ipalloc-default-subnet"}, "", "subnet to allocate within by default, in CIDR notation")
	mflag.IntVar(&peerCount, []string{"#initpeercount", "#-initpeercount", "-init-peer-count"}, 0, "number of peers in network (for IP address allocation)")
	mflag.StringVar(&dockerAPI, []string{"#api", "#-api", "-docker-api"}, "", "Docker API endpoint, e.g. unix:///var/run/docker.sock")
	mflag.BoolVar(&noDNS, []string{"-no-dns"}, false, "disable DNS server")
	mflag.StringVar(&dnsDomain, []string{"-dns-domain"}, nameserver.DefaultDomain, "local domain to server requests for")
	mflag.StringVar(&dnsListenAddress, []string{"-dns-listen-address"}, nameserver.DefaultListenAddress, "address to listen on for DNS requests")
	mflag.IntVar(&dnsTTL, []string{"-dns-ttl"}, nameserver.DefaultTTL, "TTL for DNS request from our domain")
	mflag.DurationVar(&dnsClientTimeout, []string{"-dns-fallback-timeout"}, nameserver.DefaultClientTimeout, "timeout for fallback DNS requests")
	mflag.StringVar(&dnsEffectiveListenAddress, []string{"-dns-effective-listen-address"}, "", "address DNS will actually be listening, after Docker port mapping")

	// crude way of detecting that we probably have been started in a
	// container, with `weave launch` --> suppress misleading paths in
	// mflags error messages.
	if os.Args[0] == "/home/weave/weaver" { // matches the Dockerfile ENTRYPOINT
		os.Args[0] = "weave"
		mflag.CommandLine.Init("weave", mflag.ExitOnError)
	}
	mflag.Parse()

	peers = mflag.Args()

	SetLogLevel(logLevel)
	if justVersion {
		fmt.Printf("weave router %s\n", version)
		os.Exit(0)
	}

	Log.Println("Command line options:", options())
	Log.Println("Command line peers:", peers)

	if protocolMinVersion < weave.ProtocolMinVersion || protocolMinVersion > weave.ProtocolMaxVersion {
		Log.Fatalf("--min-protocol-version must be in range [%d,%d]", weave.ProtocolMinVersion, weave.ProtocolMaxVersion)
	}
	config.ProtocolMinVersion = byte(protocolMinVersion)

	var err error

	if ifaceName != "" {
		iface, err := weavenet.EnsureInterface(ifaceName)
		if err != nil {
			Log.Fatal(err)
		}

		// bufsz flag is in MB
		config.Bridge, err = weave.NewPcap(iface, bufSzMB*1024*1024)
		if err != nil {
			Log.Fatal(err)
		}
//.........这里部分代码省略.........