Unlock 30% off on Manual Testing Annual Plans this Holiday Season.

Copied to Clipboard!

How to use CommandContext method of osutil Package

Best Syzkaller code snippet using osutil.CommandContext

exec.go

Source:exec.go

...40	}41	return strings.Trim(out.String(), "\n"), nil42}43// const CommandTimeout = 1044func CommandContext(timeout int, binPath string, args []string) (string, error) {45	// Create a new context and add a timeout to it46	ctx, cancel := context.WithTimeout(context.Background(), time.Second*time.Duration(timeout))47	defer cancel() // The cancel should be deferred so resources are cleaned up48	// Create the command with our context49	cmd := exec.CommandContext(ctx, binPath, args...)50	// This time we can simply use Output() to get the result.51	out, err := cmd.Output()52	// We want to check the context error to see if the timeout was executed.53	// The error returned by cmd.Output() will be OS specific based on what54	// happens when a process is killed.55	if ctx.Err() == context.DeadlineExceeded {56		log.Println("Command timed out")57		return "", ctx.Err()58	}59	if err != nil {60		log.Println("Non-zero exit code:", err)61	}62	return strings.Trim(string(out), "\n"), nil63}64// Install command binary.65func Install(tmpPath, binPath string) error {66	defer os.Remove(tmpPath)67	err := exec.CommandContext(context.Background(), "/usr/bin/install", tmpPath, binPath).Run()68	if err != nil {69		log.Println(err)70		return err71	}72	return nil73}74func SendReloadSignal() error {75	ppid := strconv.Itoa(os.Getppid())76	err := exec.CommandContext(context.Background(), "/bin/kill", "-HUP", ppid).Run()77	return err78}...

init.go

Source:init.go

...12	"github.com/google/syzkaller/vm/vmimpl"13)14func makeDefaultParams() *proxyAppParams {15	return &proxyAppParams{16		CommandRunner:  osutilCommandContext,17		InitRetryDelay: 10 * time.Second,18	}19}20func init() {21	vmimpl.Register(22		"proxyapp",23		func(env *vmimpl.Env) (vmimpl.Pool, error) {24			return ctor(makeDefaultParams(), env)25		},26		false)27}28// Package configuration VARs are mostly needed for tests.29type proxyAppParams struct {30	CommandRunner  func(context.Context, string, ...string) subProcessCmd31	InitRetryDelay time.Duration32}33func osutilCommandContext(ctx context.Context, bin string, args ...string) subProcessCmd {34	return osutil.CommandContext(ctx, bin, args...)35}36type subProcessCmd interface {37	StdinPipe() (io.WriteCloser, error)38	StdoutPipe() (io.ReadCloser, error)39	StderrPipe() (io.ReadCloser, error)40	Start() error41	Wait() error42}43type Config struct {44	Command        string          `json:"cmd"`45	ProxyAppConfig json.RawMessage `json:"config"`46}47func parseConfig(conf []byte) (*Config, error) {48	vmCfg := new(Config)...

CommandContext

Using AI Code Generation

1import (2func main() {3	ctx, cancel := context.WithTimeout(context.Background(), 100*time.Millisecond)4	defer cancel()5	cmd := exec.CommandContext(ctx, "sleep", "1")6	err := cmd.Run()7	fmt.Println(err)8}

CommandContext

Using AI Code Generation

1import (2func main() {3	ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)4	defer cancel()5	cmd := exec.CommandContext(ctx, "sleep", "2")6	if err := cmd.Run(); err != nil {7		fmt.Println(err)8	}9}

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.