Golang syscall.EscapeArg函數代碼示例

// CreateService installs new service name on the system.
// The service will be executed by running exepath binary.
// Use config c to specify service parameters.
// If service StartType is set to StartAutomatic,
// args will be passed to svc.Handle.Execute.
func (m *Mgr) CreateService(name, exepath string, c Config, args ...string) (*Service, error) {
	if c.StartType == 0 {
		c.StartType = StartManual
	}
	if c.ErrorControl == 0 {
		c.ErrorControl = ErrorNormal
	}
	s := syscall.EscapeArg(exepath)
	for _, v := range args {
		s += " " + syscall.EscapeArg(v)
	}
	h, err := windows.CreateService(m.Handle, toPtr(name), toPtr(c.DisplayName),
		windows.SERVICE_ALL_ACCESS, windows.SERVICE_WIN32_OWN_PROCESS,
		c.StartType, c.ErrorControl, toPtr(s), toPtr(c.LoadOrderGroup),
		nil, toStringBlock(c.Dependencies), toPtr(c.ServiceStartName), toPtr(c.Password))
	if err != nil {
		return nil, err
	}
	if c.Description != "" {
		err = updateDescription(h, c.Description)
		if err != nil {
			return nil, err
		}
	}
	return &Service{Name: name, Handle: h}, nil
}

func (s *SvcManager) escapeExecPath(exePath string, args []string) string {
	ret := syscall.EscapeArg(exePath)
	for _, v := range args {
		ret += " " + syscall.EscapeArg(v)
	}
	return ret
}

func escapeArgs(args []string) []string {
	escapedArgs := make([]string, len(args))
	for i, a := range args {
		escapedArgs[i] = syscall.EscapeArg(a)
	}
	return escapedArgs
}

func makeCmdLine(args []string) string {
	var s string
	for _, v := range args {
		if s != "" {
			s += " "
		}
		s += syscall.EscapeArg(v)
	}
	return s
}

// createCommandLine creates a command line from the Entrypoint and args
// of the ProcessConfig. It escapes the arguments if they are not already
// escaped
func createCommandLine(processConfig *execdriver.ProcessConfig, alreadyEscaped bool) (commandLine string, err error) {
	// While this should get caught earlier, just in case, validate that we
	// have something to run.
	if processConfig.Entrypoint == "" {
		return "", errors.New("No entrypoint specified")
	}

	// Build the command line of the process
	commandLine = processConfig.Entrypoint
	logrus.Debugf("Entrypoint: %s", processConfig.Entrypoint)
	for _, arg := range processConfig.Arguments {
		logrus.Debugf("appending %s", arg)
		if !alreadyEscaped {
			arg = syscall.EscapeArg(arg)
		}
		commandLine += " " + arg
	}

	logrus.Debugf("commandLine: %s", commandLine)
	return commandLine, nil
}

// Launch creates and begins debugging a new process.
func Launch(cmd []string) (*Process, error) {
	argv0Go, err := filepath.Abs(cmd[0])
	if err != nil {
		return nil, err
	}
	// Make sure the binary exists.
	if filepath.Base(cmd[0]) == cmd[0] {
		if _, err := exec.LookPath(cmd[0]); err != nil {
			return nil, err
		}
	}
	if _, err := os.Stat(argv0Go); err != nil {
		return nil, err
	}
	// Duplicate the stdin/stdout/stderr handles
	files := []uintptr{uintptr(syscall.Stdin), uintptr(syscall.Stdout), uintptr(syscall.Stderr)}
	p, _ := syscall.GetCurrentProcess()
	fd := make([]syscall.Handle, len(files))
	for i := range files {
		err := syscall.DuplicateHandle(p, syscall.Handle(files[i]), p, &fd[i], 0, true, syscall.DUPLICATE_SAME_ACCESS)
		if err != nil {
			return nil, err
		}
		defer syscall.CloseHandle(syscall.Handle(fd[i]))
	}

	argv0, err := syscall.UTF16PtrFromString(argv0Go)
	if err != nil {
		return nil, err
	}

	// create suitable command line for CreateProcess
	// see https://github.com/golang/go/blob/master/src/syscall/exec_windows.go#L326
	// adapted from standard library makeCmdLine
	// see https://github.com/golang/go/blob/master/src/syscall/exec_windows.go#L86
	var cmdLineGo string
	if len(cmd) >= 1 {
		for _, v := range cmd {
			if cmdLineGo != "" {
				cmdLineGo += " "
			}
			cmdLineGo += syscall.EscapeArg(v)
		}
	}

	var cmdLine *uint16
	if cmdLineGo != "" {
		if cmdLine, err = syscall.UTF16PtrFromString(cmdLineGo); err != nil {
			return nil, err
		}
	}

	// Initialize the startup info and create process
	si := new(sys.StartupInfo)
	si.Cb = uint32(unsafe.Sizeof(*si))
	si.Flags = syscall.STARTF_USESTDHANDLES
	si.StdInput = sys.Handle(fd[0])
	si.StdOutput = sys.Handle(fd[1])
	si.StdErr = sys.Handle(fd[2])
	pi := new(sys.ProcessInformation)
	err = sys.CreateProcess(argv0, cmdLine, nil, nil, true, DEBUGONLYTHISPROCESS, nil, nil, si, pi)
	if err != nil {
		return nil, err
	}
	sys.CloseHandle(sys.Handle(pi.Process))
	sys.CloseHandle(sys.Handle(pi.Thread))

	dbp := New(int(pi.ProcessId))

	switch runtime.GOARCH {
	case "amd64":
		dbp.arch = AMD64Arch()
	}

	// Note - it should not actually be possible for the
	// call to waitForDebugEvent to fail, since Windows
	// will always fire a CreateProcess event immediately
	// after launching under DEBUGONLYTHISPROCESS.
	var tid, exitCode int
	dbp.execPtraceFunc(func() {
		tid, exitCode, err = dbp.waitForDebugEvent()
	})
	if err != nil {
		return nil, err
	}
	if tid == 0 {
		dbp.postExit()
		return nil, ProcessExitedError{Pid: dbp.Pid, Status: exitCode}
	}

	return initializeDebugProcess(dbp, argv0Go, false)
}

//.........這裏部分代碼省略.........
		// Stop the container
		if forceKill {
			logrus.Debugf("Forcibly terminating container %s", c.ID)
			if errno, err := hcsshim.TerminateComputeSystem(c.ID, hcsshim.TimeoutInfinite, "exec-run-defer"); err != nil {
				logrus.Warnf("Ignoring error from TerminateComputeSystem 0x%X %s", errno, err)
			}
		} else {
			logrus.Debugf("Shutting down container %s", c.ID)
			if errno, err := hcsshim.ShutdownComputeSystem(c.ID, hcsshim.TimeoutInfinite, "exec-run-defer"); err != nil {
				if errno != hcsshim.Win32SystemShutdownIsInProgress &&
					errno != hcsshim.Win32SpecifiedPathInvalid &&
					errno != hcsshim.Win32SystemCannotFindThePathSpecified {
					logrus.Warnf("Ignoring error from ShutdownComputeSystem 0x%X %s", errno, err)
				}
			}
		}
	}()

	createProcessParms := hcsshim.CreateProcessParams{
		EmulateConsole:   c.ProcessConfig.Tty,
		WorkingDirectory: c.WorkingDir,
		ConsoleSize:      c.ProcessConfig.ConsoleSize,
	}

	// Configure the environment for the process
	createProcessParms.Environment = setupEnvironmentVariables(c.ProcessConfig.Env)

	// This should get caught earlier, but just in case - validate that we
	// have something to run
	if c.ProcessConfig.Entrypoint == "" {
		err = errors.New("No entrypoint specified")
		logrus.Error(err)
		return execdriver.ExitStatus{ExitCode: -1}, err
	}

	// Build the command line of the process
	createProcessParms.CommandLine = c.ProcessConfig.Entrypoint
	for _, arg := range c.ProcessConfig.Arguments {
		logrus.Debugln("appending ", arg)
		createProcessParms.CommandLine += " " + syscall.EscapeArg(arg)
	}
	logrus.Debugf("CommandLine: %s", createProcessParms.CommandLine)

	// Start the command running in the container.
	pid, stdin, stdout, stderr, _, err := hcsshim.CreateProcessInComputeSystem(c.ID, pipes.Stdin != nil, true, !c.ProcessConfig.Tty, createProcessParms)
	if err != nil {
		logrus.Errorf("CreateProcessInComputeSystem() failed %s", err)
		return execdriver.ExitStatus{ExitCode: -1}, err
	}

	// Now that the process has been launched, begin copying data to and from
	// the named pipes for the std handles.
	setupPipes(stdin, stdout, stderr, pipes)

	//Save the PID as we'll need this in Kill()
	logrus.Debugf("PID %d", pid)
	c.ContainerPid = int(pid)

	if c.ProcessConfig.Tty {
		term = NewTtyConsole(c.ID, pid)
	} else {
		term = NewStdConsole()
	}
	c.ProcessConfig.Terminal = term

	// Maintain our list of active containers. We'll need this later for exec
	// and other commands.
	d.Lock()
	d.activeContainers[c.ID] = &activeContainer{
		command: c,
	}
	d.Unlock()

	if hooks.Start != nil {
		// A closed channel for OOM is returned here as it will be
		// non-blocking and return the correct result when read.
		chOOM := make(chan struct{})
		close(chOOM)
		hooks.Start(&c.ProcessConfig, int(pid), chOOM)
	}

	var (
		exitCode int32
		errno    uint32
	)
	exitCode, errno, err = hcsshim.WaitForProcessInComputeSystem(c.ID, pid, hcsshim.TimeoutInfinite)
	if err != nil {
		if errno != hcsshim.Win32PipeHasBeenEnded {
			logrus.Warnf("WaitForProcessInComputeSystem failed (container may have been killed): %s", err)
		}
		// Do NOT return err here as the container would have
		// started, otherwise docker will deadlock. It's perfectly legitimate
		// for WaitForProcessInComputeSystem to fail in situations such
		// as the container being killed on another thread.
		return execdriver.ExitStatus{ExitCode: hcsshim.WaitErrExecFailed}, nil
	}

	logrus.Debugf("Exiting Run() exitCode %d id=%s", exitCode, c.ID)
	return execdriver.ExitStatus{ExitCode: int(exitCode)}, nil
}

// Launch creates and begins debugging a new process.
func Launch(cmd []string) (*Process, error) {
	argv0Go, err := filepath.Abs(cmd[0])
	if err != nil {
		return nil, err
	}

	// Make sure the binary exists and is an executable file
	if filepath.Base(cmd[0]) == cmd[0] {
		if _, err := exec.LookPath(cmd[0]); err != nil {
			return nil, err
		}
	}

	peFile, err := openExecutablePath(argv0Go)
	if err != nil {
		return nil, NotExecutableErr
	}
	peFile.Close()

	// Duplicate the stdin/stdout/stderr handles
	files := []uintptr{uintptr(syscall.Stdin), uintptr(syscall.Stdout), uintptr(syscall.Stderr)}
	p, _ := syscall.GetCurrentProcess()
	fd := make([]syscall.Handle, len(files))
	for i := range files {
		err := syscall.DuplicateHandle(p, syscall.Handle(files[i]), p, &fd[i], 0, true, syscall.DUPLICATE_SAME_ACCESS)
		if err != nil {
			return nil, err
		}
		defer syscall.CloseHandle(syscall.Handle(fd[i]))
	}

	argv0, err := syscall.UTF16PtrFromString(argv0Go)
	if err != nil {
		return nil, err
	}

	// create suitable command line for CreateProcess
	// see https://github.com/golang/go/blob/master/src/syscall/exec_windows.go#L326
	// adapted from standard library makeCmdLine
	// see https://github.com/golang/go/blob/master/src/syscall/exec_windows.go#L86
	var cmdLineGo string
	if len(cmd) >= 1 {
		for _, v := range cmd {
			if cmdLineGo != "" {
				cmdLineGo += " "
			}
			cmdLineGo += syscall.EscapeArg(v)
		}
	}

	var cmdLine *uint16
	if cmdLineGo != "" {
		if cmdLine, err = syscall.UTF16PtrFromString(cmdLineGo); err != nil {
			return nil, err
		}
	}

	// Initialize the startup info and create process
	si := new(sys.StartupInfo)
	si.Cb = uint32(unsafe.Sizeof(*si))
	si.Flags = syscall.STARTF_USESTDHANDLES
	si.StdInput = sys.Handle(fd[0])
	si.StdOutput = sys.Handle(fd[1])
	si.StdErr = sys.Handle(fd[2])
	pi := new(sys.ProcessInformation)
	err = sys.CreateProcess(argv0, cmdLine, nil, nil, true, _DEBUG_ONLY_THIS_PROCESS, nil, nil, si, pi)
	if err != nil {
		return nil, err
	}
	sys.CloseHandle(sys.Handle(pi.Process))
	sys.CloseHandle(sys.Handle(pi.Thread))

	return newDebugProcess(int(pi.ProcessId), argv0Go)
}