Exemplo n.º 1
0
func signalProcess(process *os.Process, sig ssh.Signal) error {
	signal := msgs.Signals[sig]
	defer trace.End(trace.Begin(fmt.Sprintf("signal process %d: %s", process.Pid, sig)))

	s := syscall.Signal(signal)
	return process.Signal(s)
}
Exemplo n.º 2
0
// Trap will listen for all stop signals and pass them along to the given
// process.
func Trap(process *os.Process) {
	c := make(chan os.Signal, 1)
	signal.Notify(c, syscall.SIGINT, syscall.SIGKILL, syscall.SIGQUIT)
	go func() {
		process.Signal(<-c)
	}()
}
Exemplo n.º 3
0
func babySit(process *os.Process) int {
	// Forward all signals to the app
	sigchan := make(chan os.Signal, 1)
	sigutil.CatchAll(sigchan)
	go func() {
		for sig := range sigchan {
			if sig == syscall.SIGCHLD {
				continue
			}
			process.Signal(sig)
		}
	}()

	// Wait for the app to exit.  Also, as pid 1 it's our job to reap all
	// orphaned zombies.
	var wstatus syscall.WaitStatus
	for {
		pid, err := syscall.Wait4(-1, &wstatus, 0, nil)
		if err == nil && pid == process.Pid {
			break
		}
	}

	return wstatus.ExitStatus()
}
Exemplo n.º 4
0
func GetExitCodeProcess(proc *os.Process) (uint32, error) {
	err := proc.Signal(syscall.Signal(0))
	if err != nil {
		return 0, err
	}
	return 259, nil
}
Exemplo n.º 5
0
func run(ch chan bool, bin string, args []string) {
	go func() {
		var proc *os.Process

		for relaunch := range ch {
			if proc != nil {
				if err := proc.Signal(os.Interrupt); err != nil {
					proc.Kill()
				}
				proc.Wait()
			}

			if !relaunch {
				continue
			}

			cmd := exec.Command(bin, args...)
			cmd.Stdout = os.Stdout
			cmd.Stderr = os.Stderr

			if err := cmd.Start(); err != nil {
				log("error: %s", err)
			}

			proc = cmd.Process
		}
	}()
	return
}
Exemplo n.º 6
0
func main() {
	flag.Parse()

	// done is sent a value when the analyzer should exit
	done := make(chan struct{}, 1)
	defer func() { done <- struct{}{} }()

	analyzerBin, analyzerArgs, compilations := parseAnalyzerCommand()
	if len(compilations) == 0 {
		flagutil.UsageError("Missing kindex-file paths")
	}

	cmd := exec.Command(analyzerBin, analyzerArgs...)
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr
	var proc *os.Process
	if err := process.StartAsync(cmd, &process.Callbacks{
		OnStart: func(p *os.Process) {
			log.Printf("Starting analyzer subprocess: %s", strings.Join(cmd.Args, " "))
			proc = p
		},
		OnExit: func(state *os.ProcessState, err error) {
			select {
			case <-done:
			default:
				log.Fatalf("Analyzer subprocess exited unexpectedly (state:%v; error:%v)", state, err)
			}
		},
	}); err != nil {
		log.Fatalf("Error starting analyzer: %v", err)
	}

	addr := fmt.Sprintf("localhost:%d", *analyzerPort)
	conn, err := grpc.Dial(addr, grpc.WithInsecure())
	if err != nil {
		log.Fatalf("Error dialing analyzer %q: %v", addr, err)
	}
	defer conn.Close()

	queue := local.NewKIndexQueue(compilations)
	fdsAddr := launchFileDataService(queue)

	wr := delimited.NewWriter(os.Stdout)

	driver := &driver.Driver{
		Analyzer: &remote.Analyzer{aspb.NewCompilationAnalyzerClient(conn)},
		Output:   func(_ context.Context, out *apb.AnalysisOutput) error { return wr.Put(out.Value) },

		FileDataService: fdsAddr,
		Compilations:    queue,
	}

	if err := driver.Run(context.Background()); err != nil {
		log.Fatal(err)
	}

	if err := proc.Signal(os.Interrupt); err != nil {
		log.Fatalf("Failed to send interrupt to analyzer: %v", err)
	}
}
Exemplo n.º 7
0
// SignalProcess sends signal sig to process p
func SignalProcess(p *os.Process, sig os.Signal) error {
	if p == nil {
		return syscall.ESRCH
	}
	err := p.Signal(sig)
	return err
}
Exemplo n.º 8
0
func babySit(process *os.Process) int {
	log := logger.New("fn", "babySit")

	// Forward all signals to the app
	sigchan := make(chan os.Signal, 1)
	sigutil.CatchAll(sigchan)
	go func() {
		for sig := range sigchan {
			log.Info("received signal", "type", sig)
			if sig == syscall.SIGCHLD {
				continue
			}
			log.Info("forwarding signal to command", "type", sig)
			process.Signal(sig)
		}
	}()

	// Wait for the app to exit.  Also, as pid 1 it's our job to reap all
	// orphaned zombies.
	var wstatus syscall.WaitStatus
	for {
		pid, err := syscall.Wait4(-1, &wstatus, 0, nil)
		if err == nil && pid == process.Pid {
			break
		}
	}

	if wstatus.Signaled() {
		log.Info("command exited due to signal")
		return 0
	}
	return wstatus.ExitStatus()
}
Exemplo n.º 9
0
// runBin runs the generated bin file with the arguments expected
func runBin(bindir, bin string, args []string) chan bool {
	var relunch = make(chan bool)
	go func() {
		binfile := fmt.Sprintf("%s/%s", bindir, bin)
		// cmdline := append([]string{bin}, args...)
		var proc *os.Process

		for dosig := range relunch {
			if proc != nil {
				if err := proc.Signal(os.Interrupt); err != nil {
					log.Printf("Error in sending signal %s", err)
					proc.Kill()
				}
				proc.Wait()
			}

			if !dosig {
				continue
			}

			cmd := exec.Command(binfile, args...)
			cmd.Stdout = os.Stdout
			cmd.Stderr = os.Stderr

			if err := cmd.Start(); err != nil {
				log.Printf("Error starting process: %s", err)
			}

			proc = cmd.Process
		}
	}()
	return relunch
}
Exemplo n.º 10
0
func run(binName, binPath string, args []string) (runch chan bool) {
	runch = make(chan bool)
	go func() {
		cmdline := append([]string{binName}, args...)
		var proc *os.Process
		for relaunch := range runch {
			if proc != nil {
				err := proc.Signal(os.Interrupt)
				if err != nil {
					log.Printf("error on sending signal to process: '%s', will now hard-kill the process\n", err)
					proc.Kill()
				}
				proc.Wait()
			}
			if !relaunch {
				continue
			}
			cmd := exec.Command(binPath, args...)
			cmd.Stdout = os.Stdout
			cmd.Stderr = os.Stderr
			log.Print(cmdline)
			err := cmd.Start()
			if err != nil {
				log.Printf("error on starting process: '%s'\n", err)
			}
			proc = cmd.Process
		}
	}()
	return
}
Exemplo n.º 11
0
// Lock creates a lockfile which prevents to open more than one instance
// of the same node (on the same machine).
func (ctx *Context) Lock() (err error) {
	var f *os.File
	var p *os.Process
	var pid int

	lockFile := path.Join(ctx.storageDir, ctx.nodeName+".lock")
	if f, err = os.Open(lockFile); err != nil {
		goto lock
	}
	if _, err = fmt.Fscanf(f, "%d", &pid); err != nil && pid == 0 {
		goto lock
	}
	if p, err = os.FindProcess(pid); err == nil && p != nil {
		if err = p.Signal(syscall.Signal(0)); err == nil {
			msg := fmt.Sprintf("node '%s' is already running", ctx.NodeName())
			return errors.New(msg)
		}
	}
lock:
	// Write a lock file.
	pidstr := []byte(fmt.Sprintf("%d", os.Getppid()))
	if err = ioutil.WriteFile(lockFile, pidstr, 0644); err != nil {
		return
	}
	return nil
}
Exemplo n.º 12
0
// Lock creates a lockfile which prevents to open more than one instance
// of the same node (on the same machine).
func (ctx *Context) Lock() (err error) {
	var f *os.File
	var p *os.Process
	var pid int

	lockFile := path.Join(ctx.storageDir, ctx.nodeName+".lock")
	if f, err = os.Open(lockFile); err != nil {
		goto lock
	}
	if _, err = fmt.Fscanf(f, "%d", &pid); err != nil && pid == 0 {
		goto lock
	}
	if p, err = os.FindProcess(pid); err == nil && p != nil {
		if err = p.Signal(os.UnixSignal(0)); err == nil {
			return errors.New(
				fmt.Sprintf("node '%s' is already running",
					ctx.NodeName()))
		}
	}
lock:
	// Write a lock file.
	if f, err = os.Create(lockFile); err == nil {
		pid := os.Getppid()
		f.Write([]byte(fmt.Sprintf("%d", pid)))
		f.Close()
	}
	return nil
}
Exemplo n.º 13
0
func handleSignal(channel chan os.Signal, synapse *os.Process) {
	select {
	case sig := <-channel:
		log.Print("Got signal: ", sig)
		synapse.Signal(os.Interrupt)
		os.Exit(1)
	}
}
Exemplo n.º 14
0
// Interrupter will send the `InfoSignal` to the given process every interval.
func Interrupter(process *os.Process, interval time.Duration) {
	go func() {
		for {
			time.Sleep(interval)
			process.Signal(InfoSignal)
		}
	}()
}
Exemplo n.º 15
0
// Log a call to os.Process.Signal.
func logSignal(p *os.Process, sig os.Signal) error {
	log.Printf("sending signal %s to PID %d", sig, p.Pid)
	err := p.Signal(sig)
	if err != nil {
		log.Print(err)
	}
	return err
}
Exemplo n.º 16
0
// SendCommands sends active signals to the given process.
func SendCommands(p *os.Process) (err error) {
	for _, sig := range signals() {
		if err = p.Signal(sig); err != nil {
			return
		}
	}
	return
}
Exemplo n.º 17
0
Arquivo: main.go Projeto: Jdesk/os
func handleTerm(p *os.Process) {
	term := make(chan os.Signal)
	signal.Notify(term, syscall.SIGTERM)
	go func() {
		<-term
		p.Signal(syscall.SIGTERM)
	}()
}
Exemplo n.º 18
0
// RunGo runs the generated binary file with the arguments expected
func RunGo(gofile string, args []string, done, stopped func()) chan bool {
	var relunch = make(chan bool)

	// if runtime.GOOS == "windows" {
	gofile = filepath.Clean(gofile)
	// }

	go func() {

		// var cmdline = fmt.Sprintf("go run %s", gofile)
		cmdargs := append([]string{"run", gofile}, args...)
		// cmdline = strings.Joinappend([]string{}, "go run", gofile)

		var proc *os.Process

		for dosig := range relunch {
			if proc != nil {
				var err error

				if runtime.GOOS == "windows" {
					err = proc.Kill()
				} else {
					err = proc.Signal(os.Interrupt)
				}

				if err != nil {
					fmt.Printf("---> Error in Sending Kill Signal %s\n", err)
					proc.Kill()
				}
				proc.Wait()
				proc = nil
			}

			if !dosig {
				continue
			}

			fmt.Printf("--> Starting cmd: %s\n", cmdargs)
			cmd := exec.Command("go", cmdargs...)
			cmd.Stdout = os.Stdout
			cmd.Stderr = os.Stderr

			if err := cmd.Start(); err != nil {
				fmt.Printf("---> Error starting process: %s\n", err)
			}

			proc = cmd.Process
			if done != nil {
				done()
			}
		}

		if stopped != nil {
			stopped()
		}
	}()
	return relunch
}
Exemplo n.º 19
0
func notifyAlive(p *os.Process, waiter chan int) {
	for {
		if PRINT_INFO {
			fmt.Println("Notifying")
		}
		time.Sleep(time.Second)
		p.Signal(syscall.SIGHUP)
	}
}
Exemplo n.º 20
0
// Go doesn't support signals in windows (pre Go 1.3) because windows doesn't have signals.
// Non-windows implementation will use signals
func stop(process *os.Process) error {
	err := process.Signal(os.Interrupt)
	if err != nil {
		log.Println("Error while sending SIGINT to running server:", err)
		return err
	}
	_, err = process.Wait()
	return err
}
Exemplo n.º 21
0
// DoAppSupervision TODO
func DoAppSupervision(cmdArgs []string) {

	// Launch the user app
	var appProcess *os.Process
	appChan := make(chan error, 1)
	if len(cmdArgs) > 0 {
		log.Infof("Launching app '%s' with args '%s'", cmdArgs[0], strings.Join(cmdArgs[1:], " "))

		cmd := exec.Command(cmdArgs[0], cmdArgs[1:]...)
		cmd.Stdin = os.Stdin
		cmd.Stdout = os.Stdout
		cmd.Stderr = os.Stderr

		err := cmd.Start()
		if err != nil {
			appChan <- err
		} else {
			appProcess = cmd.Process
			go func() {
				appChan <- cmd.Wait()
			}()
		}
	}

	// Intercept SIGTERM/SIGINT and stop
	sigChan := make(chan os.Signal, 1)
	signal.Notify(sigChan, syscall.SIGTERM, syscall.SIGINT)
	for {
		select {
		case sig := <-sigChan:
			log.Infof("Intercepted signal '%s'", sig)
			if appProcess != nil {
				appProcess.Signal(sig)
			} else {
				Shutdown(0)
			}
		case err := <-appChan:
			exitCode := 0
			if err == nil {
				log.Info("App terminated with exit code 0")
			} else {
				exitCode = 1
				if exitErr, ok := err.(*exec.ExitError); ok {
					if waitStatus, ok := exitErr.Sys().(syscall.WaitStatus); ok {
						exitCode = waitStatus.ExitStatus()
					}
					log.Errorf("App terminated with exit code %d", exitCode)
				} else {
					log.Errorf("App failed to start: %v", err)
				}
			}

			Shutdown(exitCode)
		}
	}
}
Exemplo n.º 22
0
// Attempts to shut down a process gracefully.
// There's an obvious race condition here; if we succeed with SIGTERM and
// somebody else gets the same pid in 10 seconds, we'll SIGKILL them.
// Unlikely in most cases? TODO(gaal): maybe add a way for a caller tor
// signal to us that Wait succeeded.
func shutdown(process *os.Process) {
	process.Signal(syscall.SIGTERM)

	go func() {
		time.Sleep(10e9)
		if _, err := os.FindProcess(process.Pid); err == nil {
			process.Signal(syscall.SIGKILL) // == process.Kill()
		}
	}()
}
Exemplo n.º 23
0
Arquivo: srv.go Projeto: jcasts/gosrv
func waitForProc(proc *os.Process) bool {
	var err error
	// Check every 100 ms up to 100 times (10s total)
	for i := 0; err == nil && i < 100; i++ {
		time.Sleep(100 * time.Millisecond)
		err = proc.Signal(syscall.Signal(0))
	}

	return err != nil
}
Exemplo n.º 24
0
func watch() {
	app := core.NewApp("sarif", "tars")
	app.Init()

	info := Cache{FilePath: app.Config.Dir() + "/soji.json"}
	info.Bars = make(map[string]Bar)
	info.Read()

	err := info.Read()
	if err == nil {
		if info.PID > 0 {
			var p *os.Process
			p, err = os.FindProcess(info.PID)
			if err == nil {
				err = p.Signal(syscall.Signal(0))
			}
		} else {
			err = errors.New("PID not found")
		}
	}

	if err != nil {
		fork(app)
		return
	}

	mode := ""
	if *isTmux {
		mode = "tmux"
	}

	keys := make([]string, 0, len(info.Bars))
	if len(flag.Args()) > 0 {
		keys = flag.Args()
	} else {
		for key := range info.Bars {
			keys = append(keys, key)
		}
		sort.Strings(keys)
	}

	texts := make([]string, 0)
	for _, key := range keys {
		bar, ok := info.Bars[key]
		if !ok {
			continue
		}
		text := bar.PrettyString(mode)
		if text != "" {
			texts = append(texts, text)
		}
	}
	fmt.Println(strings.Join(texts, *delimiter))
}
Exemplo n.º 25
0
func killCamli(proc *os.Process) {
	if *fast {
		return
	}
	dbg.Println("killing dev server")
	err := proc.Signal(os.Interrupt)
	if err != nil {
		log.Fatalf("Could not kill server: %v", err)
	}
	dbg.Println("")
}
Exemplo n.º 26
0
func sendSignalToProcess(process *os.Process, what values.Signal, tryGroup bool) error {
	if tryGroup {
		pgid, err := syscall.Getpgid(process.Pid)
		if err == nil {
			if syscall.Kill(-pgid, syscall.Signal(what)) == nil {
				return nil
			}
		}
	}
	process.Signal(syscall.Signal(what))
	return nil
}
Exemplo n.º 27
0
Arquivo: http.go Projeto: orivej/grace
func endProcess(p *os.Process) error {
	if p == nil {
		return nil
	}
	if err := p.Signal(syscall.SIGTERM); err != nil {
		return err
	}
	_, err := p.Wait()
	if *verbose {
		log.Printf("Exiting pid %d.", p.Pid)
	}
	return err
}
Exemplo n.º 28
0
func groupKill(p *os.Process, interrupt bool) error {
	if p == nil {
		return nil
	}
	Log.Info("groupKill", "pid", p.Pid)
	defer recover()
	if interrupt {
		defer p.Signal(os.Interrupt)
		return GroupKill(p.Pid, os.Interrupt)
	}
	defer p.Kill()
	return GroupKill(p.Pid, os.Kill)
}
Exemplo n.º 29
0
func (d *Daemon) handle(input link.Input, process *os.Process, stdin *os.File) error {
	if input.WindowSize != nil {
		setWinSize(stdin, input.WindowSize.Columns, input.WindowSize.Rows)
		process.Signal(syscall.SIGWINCH)
	} else if input.EOF {
		stdin.Sync()
		err := stdin.Close()
		if d.WithTty {
			process.Signal(syscall.SIGHUP)
		}
		if err != nil {
			return err
		}
	} else if input.Signal != nil {
		if input.Signal.Signal == garden.SignalTerminate {
			process.Signal(syscall.SIGTERM)
		} else if input.Signal.Signal == garden.SignalKill {
			process.Signal(syscall.SIGKILL)
		}
	} else {
		_, err := stdin.Write(input.StdinData)
		if err != nil {
			return err
		}
	}

	return nil
}
Exemplo n.º 30
0
// RunBin runs the generated binary file with the arguments expected
func RunBin(binfile string, args []string, done, stopped func()) chan bool {
	var relunch = make(chan bool)
	go func() {
		// binfile := fmt.Sprintf("%s/%s", bindir, bin)
		// cmdline := append([]string{bin}, args...)
		var proc *os.Process

		for dosig := range relunch {
			if proc != nil {
				var err error

				if runtime.GOOS == "windows" {
					err = proc.Kill()
				} else {
					err = proc.Signal(os.Interrupt)
				}

				if err != nil {
					fmt.Printf("---> Error in Sending Kill Signal: %s\n", err)
					proc.Kill()
				}
				proc.Wait()
				proc = nil
			}

			if !dosig {
				continue
			}

			fmt.Printf("--> Starting bin: %s\n", binfile)
			cmd := exec.Command(binfile, args...)
			cmd.Stdout = os.Stdout
			cmd.Stderr = os.Stderr

			if err := cmd.Start(); err != nil {
				fmt.Printf("---> Error starting process: %s -> %s\n", binfile, err)
			}

			proc = cmd.Process
			if done != nil {
				done()
			}
		}

		if stopped != nil {
			stopped()
		}
	}()
	return relunch
}