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How to use Kill method of launcher Package
Best Rod code snippet using launcher.Kill
launcher.go
Source:launcher.go 
...29 Start() (Connector, error)30 // Returns true iff the instance is running.31 IsRunning() (bool, error)32 // Stops the instance. This is allowed to take up to 3 seconds to return.33 Kill() error34}35const successfulBootMarker = "{{{reset}}}"36const qemuBootTimeout = 10 * time.Second37// A QemuLauncher starts Fuchsia on QEMU38type QemuLauncher struct {39 Pid int40 TmpDir string41 build Build42 // Paths to files that are created by Prepare():43 initrd string44 extendedBlk string45 // Overridable for testing46 timeout time.Duration47}48// NewQemuLauncher constructs a new QemuLauncher49func NewQemuLauncher(build Build) *QemuLauncher {50 return &QemuLauncher{build: build, timeout: qemuBootTimeout}51}52// Find an unused TCP port on the host53func getFreePort() (int, error) {54 listener, err := net.Listen("tcp", "localhost:0")55 if err != nil {56 return 0, err57 }58 port := listener.Addr().(*net.TCPAddr).Port59 // Technically this might get used before QEMU starts...60 listener.Close()61 return port, nil62}63// Configure QEMU appropriately64func getQemuInvocation(binary, kernel, initrd, blk string, port int) ([]string, error) {65 qemuCmd := &qemu.QEMUCommandBuilder{}66 qemuCmd.SetBinary(binary)67 qemuCmd.SetTarget(qemu.TargetEnum.X86_64, true /* KVM */)68 qemuCmd.SetKernel(kernel)69 qemuCmd.SetInitrd(initrd)70 qemuCmd.SetCPUCount(4)71 qemuCmd.SetMemory(3072 /* MiB */)72 qemuCmd.AddVirtioBlkPciDrive(qemu.Drive{73 ID: "d0",74 File: blk,75 })76 network := qemu.Netdev{77 ID: "net0",78 Device: qemu.Device{Model: qemu.DeviceModelVirtioNetPCI},79 User: &qemu.NetdevUser{80 Network: "192.168.3.0/24",81 DHCPStart: "192.168.3.9",82 Host: "192.168.3.2",83 Forwards: []qemu.Forward{{HostPort: port, GuestPort: 22}},84 },85 }86 network.Device.AddOption("mac", "52:54:00:63:5e:7b")87 qemuCmd.AddNetwork(network)88 // The system will halt on a kernel panic instead of rebooting.89 qemuCmd.AddKernelArg("kernel.halt-on-panic=true")90 // Do not print colors.91 qemuCmd.AddKernelArg("TERM=dumb")92 // Necessary to redirect serial to stdout for x86.93 qemuCmd.AddKernelArg("kernel.serial=legacy")94 qemuCmd.SetFlag("-nographic")95 qemuCmd.SetFlag("-serial", "stdio")96 qemuCmd.SetFlag("-monitor", "none")97 entropy := make([]byte, 32)98 if _, err := rand.Read(entropy); err == nil {99 qemuCmd.AddKernelArg("kernel.entropy-mixin=" + hex.EncodeToString(entropy))100 }101 return qemuCmd.Build()102}103func fileExists(path string) bool {104 _, err := os.Stat(path)105 return !os.IsNotExist(err)106}107// Prepare files that are needed by QEMU, if they haven't already been prepared.108//109// If Prepare succeeds, it is up to the caller to clean up by calling Kill later.110// However, if it fails, any resources will have been automatically released.111func (q *QemuLauncher) Prepare() (returnErr error) {112 paths, err := q.build.Path("zbi", "fvm", "blk", "authkeys", "zbitool")113 if err != nil {114 return fmt.Errorf("Error resolving qemu dependencies: %s", err)115 }116 zbi, fvm, blk, authkeys, zbitool := paths[0], paths[1], paths[2], paths[3], paths[4]117 // Create a tmpdir to store files we need118 if q.TmpDir == "" {119 tmpDir, err := ioutil.TempDir("", "clusterfuchsia-qemu-")120 if err != nil {121 return fmt.Errorf("Error creating tempdir: %s", err)122 }123 q.TmpDir = tmpDir124 }125 // If we fail after this point, we need to make sure to clean up126 defer func() {127 if returnErr != nil {128 q.cleanup()129 }130 }()131 // Stick our SSH key into the authorized_keys files132 initrd := path.Join(q.TmpDir, "ssh-"+path.Base(zbi))133 if !fileExists(initrd) {134 // TODO(fxbug.dev/45424): generate ssh key per-instance135 entry := "data/ssh/authorized_keys=" + authkeys136 if err := CreateProcessForeground(zbitool, "-o", initrd, zbi, "-e", entry); err != nil {137 return fmt.Errorf("adding ssh key failed: %s", err)138 }139 }140 q.initrd = initrd141 // Make an expanded copy of the disk image142 extendedBlk := path.Join(q.TmpDir, "extended-"+path.Base(blk))143 if !fileExists(extendedBlk) {144 if err := CreateProcessForeground("cp", blk, extendedBlk); err != nil {145 return fmt.Errorf("cp failed: %s", err)146 }147 if err := CreateProcessForeground(fvm, extendedBlk, "extend",148 "--length", "3G"); err != nil {149 return fmt.Errorf("fvm failed: %s", err)150 }151 }152 q.extendedBlk = extendedBlk153 return nil154}155// Start launches QEMU and waits for it to get through the basic boot sequence.156// Note that networking will not necessarily be fully up by the time Start() returns157//158// If Start succeeds, it is up to the caller to clean up by calling Kill later.159// However, if it fails, any resources will have been automatically released.160func (q *QemuLauncher) Start() (conn Connector, returnErr error) {161 running, err := q.IsRunning()162 if err != nil {163 return nil, fmt.Errorf("Error checking run state: %s", err)164 }165 if running {166 return nil, fmt.Errorf("Start called but already running")167 }168 paths, err := q.build.Path("qemu", "kernel", "sshid")169 if err != nil {170 return nil, fmt.Errorf("Error resolving qemu dependencies: %s", err)171 }172 binary, kernel, sshid := paths[0], paths[1], paths[2]173 port, err := getFreePort()174 if err != nil {175 return nil, fmt.Errorf("couldn't get free port: %s", err)176 }177 if err := q.Prepare(); err != nil {178 return nil, fmt.Errorf("error while preparing to start: %s", err)179 }180 // If we fail after this point, we need to make sure to clean up181 defer func() {182 if returnErr != nil {183 q.cleanup()184 }185 }()186 invocation, err := getQemuInvocation(binary, kernel, q.initrd, q.extendedBlk, port)187 if err != nil {188 return nil, fmt.Errorf("qemu configuration error: %s", err)189 }190 cmd := NewCommand(invocation[0], invocation[1:]...)191 // TODO(fxbug.dev/45431): log qemu output to some global tempfile to match current CF behavior192 outPipe, err := cmd.StdoutPipe()193 if err != nil {194 return nil, fmt.Errorf("error attaching stdout: %s", err)195 }196 cmd.Stderr = cmd.Stdout // capture stderr too197 // Save early log in case of error198 var log []string199 errCh := make(chan error)200 go func() {201 scanner := bufio.NewScanner(outPipe)202 for scanner.Scan() {203 line := scanner.Text()204 log = append(log, line)205 if strings.Contains(line, successfulBootMarker) {206 // Early boot has finished207 errCh <- nil208 return209 }210 }211 if err := scanner.Err(); err != nil {212 errCh <- fmt.Errorf("failed during scan: %s", err)213 return214 }215 errCh <- fmt.Errorf("qemu exited early")216 }()217 if err := cmd.Start(); err != nil {218 return nil, fmt.Errorf("failed to start qemu: %s", err)219 }220 q.Pid = cmd.Process.Pid221 glog.Info("Waiting for boot to complete...")222 select {223 case err := <-errCh:224 if err != nil {225 // Kill the process, just in case this was an error other than EOF226 cmd.Process.Kill()227 // Dump the boot log228 glog.Errorf(strings.Join(log, "\n"))229 return nil, fmt.Errorf("error during boot: %s", err)230 }231 case <-time.After(q.timeout):232 // Kill the process, and wait for the goroutine above to terminate233 cmd.Process.Kill()234 <-errCh235 // Dump the boot log236 glog.Errorf(strings.Join(log, "\n"))237 return nil, fmt.Errorf("timeout waiting for boot")238 }239 glog.Info("Instance started.")240 // Detach from the child, since we will never wait on it241 cmd.Process.Release()242 return &SSHConnector{Host: "localhost", Port: port, Key: sshid}, nil243}244// IsRunning checks if the qemu process is alive245func (q *QemuLauncher) IsRunning() (bool, error) {246 if q.Pid == 0 {247 return false, nil248 }249 if err := CreateProcess("ps", "-p", strconv.Itoa(q.Pid)); err != nil {250 if cmderr, ok := err.(*exec.ExitError); ok && cmderr.ExitCode() == 1 {251 return false, nil252 }253 return false, fmt.Errorf("error running ps: %s", err)254 }255 return true, nil256}257// Cleans up any temporary files used by the launcher258func (q *QemuLauncher) cleanup() {259 if q.TmpDir != "" {260 if err := os.RemoveAll(q.TmpDir); err != nil {261 glog.Warningf("failed to remove temp dir: %s", err)262 }263 q.TmpDir = ""264 }265}266// Kill tells the QEMU process to terminate, and cleans up the TmpDir267func (q *QemuLauncher) Kill() error {268 if q.Pid != 0 {269 glog.Infof("Killing PID %d", q.Pid)270 // TODO(fxbug.dev/45431): More gracefully, with timeout271 if err := syscall.Kill(q.Pid, syscall.SIGKILL); err != nil {272 glog.Warningf("failed to kill instance: %s", err)273 }274 q.Pid = 0275 }276 q.cleanup()277 return nil278}279func loadLauncherFromHandle(build Build, handle Handle) (Launcher, error) {280 handleData, err := handle.GetData()281 if err != nil {282 return nil, err283 }284 // Check that the Launcher is in a valid state285 switch launcher := handleData.launcher.(type) {...
launcher_test.go
Source:launcher_test.go
...75 g := setup(t)76 defaults.Proxy = "test.com"77 defer func() { defaults.ResetWith("") }()78 l := launcher.New()79 defer l.Kill()80 u := l.MustLaunch()81 g.Regex(`\Aws://.+\z`, u)82 parsed, _ := url.Parse(u)83 { // test GetWebSocketDebuggerURL84 for _, prefix := range []string{"", ":", "127.0.0.1:", "ws://127.0.0.1:"} {85 u2 := launcher.MustResolveURL(prefix + parsed.Port())86 g.Regex(u, u2)87 }88 _, err := launcher.ResolveURL("")89 g.Err(err)90 }91 {92 _, err := launcher.NewManaged("")93 g.Err(err)94 _, err = launcher.NewManaged("1://")95 g.Err(err)96 _, err = launcher.NewManaged("ws://not-exists")97 g.Err(err)98 }99 {100 g.Panic(func() { launcher.New().Set("a=b") })101 }102}103func TestLaunchUserMode(t *testing.T) {104 g := setup(t)105 l := launcher.NewUserMode()106 defer l.Kill()107 l.Kill() // empty kill should do nothing108 has := l.Has("not-exists")109 g.False(has)110 l.Append("test-append", "a")111 f := l.Get("test-append")112 g.Eq("a", f)113 dir := l.Get(flags.UserDataDir)114 port := 58472115 l = l.Context(g.Context()).Delete("test").Bin("").116 Revision(launcher.RevisionDefault).117 Logger(ioutil.Discard).118 Leakless(false).Leakless(true).119 Headless(false).Headless(true).RemoteDebuggingPort(port).120 NoSandbox(true).NoSandbox(false).121 Devtools(true).Devtools(false).122 StartURL("about:blank").123 Proxy("test.com").124 UserDataDir("test").UserDataDir(dir).125 WorkingDir("").126 Env(append(os.Environ(), "TZ=Asia/Tokyo")...)127 g.Eq(l.FormatArgs(), []string /* len=6 cap=8 */ {128 "--headless",129 `--no-startup-window`, /* len=19 */130 `--proxy-server=test.com`, /* len=23 */131 `--remote-debugging-port=58472`, /* len=29 */132 "--test-append=a",133 "about:blank",134 })135 url := l.MustLaunch()136 g.Eq(url, launcher.NewUserMode().RemoteDebuggingPort(port).MustLaunch())137}138func TestUserModeErr(t *testing.T) {139 g := setup(t)140 _, err := launcher.NewUserMode().RemoteDebuggingPort(48277).Bin("not-exists").Launch()141 g.Err(err)142 _, err = launcher.NewUserMode().RemoteDebuggingPort(58217).Bin("echo").Launch()143 g.Err(err)144}145func TestAppMode(t *testing.T) {146 g := setup(t)147 l := launcher.NewAppMode("http://example.com")148 g.Eq(l.Get(flags.App), "http://example.com")149}150func TestGetWebSocketDebuggerURLErr(t *testing.T) {151 g := setup(t)152 _, err := launcher.ResolveURL("1://")153 g.Err(err)154}155func TestLaunchErr(t *testing.T) {156 g := setup(t)157 g.Panic(func() {158 launcher.New().Bin("not-exists").MustLaunch()159 })160 g.Panic(func() {161 launcher.New().Headless(false).Bin("not-exists").MustLaunch()162 })163 g.Panic(func() {164 launcher.New().ClientHeader()165 })166 {167 l := launcher.New().XVFB()168 _, _ = l.Launch()169 l.Kill()170 }171}172func newBrowser() (*launcher.Browser, func()) {173 ctx, cancel := context.WithTimeout(context.Background(), 2*time.Minute)174 b := launcher.NewBrowser()175 if !testing.Verbose() {176 b.Logger = utils.LoggerQuiet177 }178 b.Context = ctx179 return b, cancel180}181var testProfileDir = flag.Bool("test-profile-dir", false, "set it to test profile dir")182func TestProfileDir(t *testing.T) {183 g := setup(t)...
manager.go
Source:manager.go
...155 httputil.NewSingleHostReverseProxy(toHTTP(*parsedURL)).ServeHTTP(w, r)156}157func (m *Manager) cleanup(l *Launcher, kill bool) {158 if kill {159 l.Kill()160 m.Logger.Println("Killed PID:", l.PID())161 }162 if !l.Has(flags.KeepUserDataDir) {163 l.Cleanup()164 dir := l.Get(flags.UserDataDir)165 m.Logger.Println("Removed", dir)166 }167}...
Kill
Using AI Code Generation
1import (2func main() {3 cmd := exec.Command("ls")4 cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}5 err := cmd.Start()6 if err != nil {7 fmt.Println("Error starting process: ", err)8 }9 fmt.Printf("The process id is %v10 err = syscall.Kill(-cmd.Process.Pid, syscall.SIGKILL)11 if err != nil {12 fmt.Println("Error killing process: ", err)13 }14}
Kill
Using AI Code Generation
1import (2func main() {3 cmd := exec.Command("notepad.exe")4 err := cmd.Start()5 if err != nil {6 fmt.Println("Error while launching notepad")7 fmt.Println(err)8 }9 err = cmd.Process.Kill()10 if err != nil {11 fmt.Println("Error while killing notepad")12 fmt.Println(err)13 }14 fmt.Println("Notepad killed successfully")15}16Related Posts: Golang - exec.Command() example17Golang - exec.CommandContext() example
Kill
Using AI Code Generation
1import (2func main() {3 cmd := exec.Command("ls")4 if err := cmd.Start(); err != nil {5 fmt.Println("Error starting process: ", err)6 }7 fmt.Println("Process id of ls command is: ", cmd.Process.Pid)8 err := syscall.Kill(cmd.Process.Pid, syscall.SIGKILL)9 if err != nil {10 fmt.Println("Error killing process: ", err)11 }12 fmt.Println("Process killed")13}
Kill
Using AI Code Generation
1import (2func main() {3 cmd := exec.Command("ls", "-l")4 cmd.Start()5 cmd.Wait()6 err := cmd.Process.Kill()7 if err != nil {8 fmt.Println("Process already finished")9 } else {10 fmt.Println("Process killed")11 }12}13import (14func main() {15 cmd := exec.Command("ls", "-l")16 cmd.Start()17 cmd.Wait()18 err := cmd.Process.Signal(os.Interrupt)19 if err != nil {20 fmt.Println("Process already finished")21 } else {22 fmt.Println("Process killed")23 }24}25import (26func main() {27 cmd := exec.Command("ls", "-l")28 cmd.Start()29 cmd.Wait()30 err := cmd.Process.Release()31 if err != nil {32 fmt.Println("Process already finished")33 } else {34 fmt.Println("Process killed")35 }36}
Kill
Using AI Code Generation
1import (2func main() {3 fmt.Println("Hello World")4 cmd := exec.Command("java", "launcher")5 cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}6 cmd.Start()7 time.Sleep(3 * time.Second)8 syscall.Kill(-cmd.Process.Pid, syscall.SIGKILL)9}10import java.io.IOException;11public class launcher {12 public static void main(String[] args) throws IOException {13 Process p = Runtime.getRuntime().exec("java child");14 }15}16public class child {17 public static void main(String[] args) {18 System.out.println("Hello World");19 }20}
Kill
Using AI Code Generation
1import (2func main() {3 launcher.Kill()4}5import (6func Kill() {7 cmd := exec.Command("notepad.exe")8 cmd.SysProcAttr = &syscall.SysProcAttr{HideWindow: true}9 cmd.Start()10 process, err := os.FindProcess(pid)11 if err != nil {12 panic(err)13 }14 process.Kill()15}16import (17func main() {18 launcher.Kill()19}
Kill
Using AI Code Generation
1import (2func main() {3 cmd := exec.Command("C:\\Users\\abc\\Desktop\\launcher.exe")4 err := cmd.Start()5 if err != nil {6 fmt.Println(err)7 }8 fmt.Println("Waiting for command to finish...")9 err = cmd.Wait()10 fmt.Println("Command finished with error: %v", err)11 time.Sleep(5 * time.Second)12 fmt.Println("Killing the process")13 cmd.Process.Kill()14 fmt.Println("Process killed")15 time.Sleep(5 * time.Second)16 fmt.Println("Starting the process again")17 cmd = exec.Command("C:\\Users\\abc\\Desktop\\launcher.exe")18 err = cmd.Start()19 if err != nil {20 fmt.Println(err)21 }22 fmt.Println("Waiting for command to finish...")23 err = cmd.Wait()24 fmt.Println("Command finished with error: %v", err)25 time.Sleep(5 * time.Second)26 os.Exit(0)27}28import (29func main() {30 cmd := exec.Command("C:\\Users\\abc\\Desktop\\launcher.exe")31 err := cmd.Start()32 if err != nil {33 fmt.Println(err)34 }35 fmt.Println("Waiting for command to finish...")36 err = cmd.Wait()37 fmt.Println("Command finished with error: %v", err)38 time.Sleep(5 * time.Second)39 fmt.Println("Killing the process")40 cmd.Process.Kill()41 fmt.Println("Process killed")42 time.Sleep(5 * time.Second)
Kill
Using AI Code Generation
1import (2func main() {3 fmt.Println("Executing the command")4 cmd := exec.Command("cmd.exe", "/C", "start", "notepad.exe")5 cmd.SysProcAttr = &syscall.SysProcAttr{HideWindow: true}6 cmd.Start()7 fmt.Println("Press any key to kill the process")8 bufio.NewReader(os.Stdin).ReadBytes('\n')9 cmd.Process.Kill()10}
Kill
Using AI Code Generation
1import (2func main() {3 launch := launcher.NewLauncher()4 launch.Kill()5 fmt.Println("Killed")6}
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