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How to use UpdateOnStart method of main Package

Best Syzkaller code snippet using main.UpdateOnStart

syzupdater.go

Source:syzupdater.go

...93		syzFiles:     syzFiles,94		targets:      targets,95	}96}97// UpdateOnStart does 3 things:98//  - ensures that the current executable is fresh99//  - ensures that we have a working syzkaller build in current100func (upd *SyzUpdater) UpdateOnStart(shutdown chan struct{}) {101	os.RemoveAll(upd.currentDir)102	exeTag, exeMod := readTag(upd.exe + ".tag")103	latestTag := upd.checkLatest()104	if exeTag == latestTag && time.Since(exeMod) < time.Minute {105		// Have a freash up-to-date build, probably just restarted.106		log.Logf(0, "current executable is up-to-date (%v)", exeTag)107		if err := osutil.LinkFiles(upd.latestDir, upd.currentDir, upd.syzFiles); err != nil {108			log.Fatal(err)109		}110		return111	}112	if exeTag == "" {113		log.Logf(0, "current executable is bootstrap")114	} else {...

main.go

Source:main.go

1package main2import (3	"bufio"4	"compress/bzip2"5	"context"6	"flag"7	"github.com/coraxster/passportChecker"8	"github.com/dgraph-io/badger"9	"github.com/go-chi/chi"10	"github.com/go-chi/chi/middleware"11	"github.com/mileusna/crontab"12	"github.com/pkg/errors"13	"github.com/seiflotfy/cuckoofilter"14	"io"15	"log"16	"net/http"17	"os"18	"os/signal"19	"runtime"20	"sync"21)22const CuckooCapacity = 20000000023var url = flag.String("url", "https://guvm.mvd.ru/upload/expired-passports/list_of_expired_passports.csv.bz2", "passport numbers bz2 url")24var port = flag.String("port", "80", "serve port")25var updateCron = flag.String("updateCron", "0 2 * * *", "when update")26var updateOnStart = flag.Bool("updateOnStart", false, "update on start")27var parseMutex sync.Mutex28func main() {29	flag.Parse()30	logFile, err := os.OpenFile("log.log", os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)31	checkError(err)32	defer logFile.Close()33	log.SetOutput(io.MultiWriter(os.Stdout, logFile))34	middleware.DefaultLogger = middleware.RequestLogger(&middleware.DefaultLogFormatter{Logger: log.New(io.MultiWriter(os.Stdout, logFile), "", log.LstdFlags), NoColor: false})35	ctx := makeContext()36	bdb := getBadger()37	defer bdb.Close()38	badCh := passportChecker.MakeBadgerChecker(bdb)39	filter, err := getCuckoo(bdb)40	checkError(err)41	log.Println("INFO: Cuckoo size: ", filter.Count())42	CuCh, err := passportChecker.MakeCuckooChecker(filter)43	checkError(err)44	ch := passportChecker.MakeMultiChecker(CuCh, badCh)45	updateFunc := func() {46		parseMutex.Lock()47		defer parseMutex.Unlock()48		changed, err := updateChecker(ctx, ch, bdb, *url)49		if err != nil {50			log.Print("ERROR: while updating. ", err.Error())51			return52		}53		if changed {54			saveCuckoo(bdb, filter)55		}56	}57	if *updateOnStart {58		go func() {59			updateFunc()60		}()61	}62	log.Println("INFO: Crontab config: ", *updateCron)63	ctab := crontab.New()64	err = ctab.AddJob(*updateCron, updateFunc)65	checkError(err)66	err = startServer(ctx, ch)67	checkError(err)68	parseMutex.Lock()69}70func startServer(ctx context.Context, ch *passportChecker.MultiChecker) error {71	r := chi.NewRouter()72	h := passportChecker.MakeHandler(ch)73	r.Use(middleware.Logger)74	r.Use(middleware.Recoverer)75	r.Get("/check/{value}", h.Check)76	srv := http.Server{Addr: ":" + *port, Handler: r}77	log.Print("INFO: starting serving on :" + *port)78	go func() {79		err := srv.ListenAndServe()80		if err != http.ErrServerClosed {81			checkError(err)82		}83	}()84	<-ctx.Done()85	return srv.Shutdown(context.Background())86}87func getBadger() *badger.DB {88	opts := badger.DefaultOptions89	opts.Dir = "./badger"90	opts.ValueDir = "./badger"91	opts.SyncWrites = false92	opts.ValueLogMaxEntries = 10000000093	bdb, err := badger.Open(opts)94	checkError(err)95	return bdb96}97func updateChecker(ctx context.Context, ch passportChecker.ExistChecker, bdb *badger.DB, url string) (bool, error) {98	log.Print("INFO: parsing url: " + url)99	localVersion, err := getLocalVersion(bdb)100	if err != nil {101		return false, err102	}103	log.Println("INFO: Local bz2 version: ", localVersion)104	req, err := http.NewRequest("GET", url, nil)105	if err != nil {106		return false, err107	}108	req.Header.Add("If-None-Match", localVersion)109	resp, err := http.DefaultClient.Do(req)110	defer resp.Body.Close()111	if err != nil {112		return false, err113	}114	if resp.StatusCode == 304 {115		log.Println("INFO: Remote version has not changed")116		return false, nil117	}118	remoteVersion := resp.Header.Get("ETag")119	if remoteVersion == "" {120		return false, errors.New("Server returns response without ETag header")121	}122	log.Println("INFO: Remote bz2 version: ", remoteVersion)123	reader := bufio.NewReader(bzip2.NewReader(resp.Body))124	err = fillChecker(ctx, ch, reader)125	if err != nil {126		return false, err127	}128	return true, setLocalVersion(bdb, remoteVersion)129}130func fillChecker(ctx context.Context, ch passportChecker.ExistChecker, reader *bufio.Reader) error {131	log.Println("INFO: Start filling ")132	chunkCh := make(chan []string)133	defer close(chunkCh)134	for i := 0; i < runtime.NumCPU(); i++ {135		go func() {136			for chunk := range chunkCh {137				err := ch.Add(chunk)138				if err != nil {139					log.Printf("ERROR: Add error: %v", err)140				}141			}142		}()143	}144	chunk := make([]string, 0, 1000)145	var readCount uint146	var err error147forLoop:148	for {149		select {150		case <-ctx.Done():151			err = ctx.Err()152			break forLoop153		default:154		}155		var line []byte156		line, _, err = reader.ReadLine()157		if err == io.EOF {158			err = nil159			break160		}161		if err != nil {162			break163		}164		chunk = append(chunk, string(line))165		if len(chunk) == cap(chunk) {166			chunkCh <- chunk167			chunk = make([]string, 0, cap(chunk))168		}169		readCount++170		if readCount%1000000 == 0.0 {171			log.Printf("INFO: Read: %v", readCount)172		}173	}174	log.Printf("INFO: Read done: %v", readCount)175	return err176}177func getLocalVersion(bdb *badger.DB) (string, error) {178	var localVersion string179	err := bdb.View(func(txn *badger.Txn) error {180		item, err := txn.Get([]byte("bzVersion"))181		if err == badger.ErrKeyNotFound {182			return nil183		}184		if err != nil {185			return err186		}187		err = item.Value(func(v []byte) error {188			localVersion = string(v)189			return nil190		})191		if err != nil {192			return err193		}194		return nil195	})196	return localVersion, err197}198func setLocalVersion(bdb *badger.DB, localVersion string) error {199	return bdb.Update(func(txn *badger.Txn) error {200		return txn.Set([]byte("bzVersion"), []byte(localVersion))201	})202}203func getCuckoo(db *badger.DB) (*cuckoo.Filter, error) {204	log.Print("INFO: reading Cuckoo..")205	b := make([]byte, 0)206	err := db.View(func(txn *badger.Txn) error {207		i, err := txn.Get([]byte("Cuckoo"))208		if err == badger.ErrKeyNotFound {209			return nil210		}211		if err != nil {212			return err213		}214		b, err = i.ValueCopy(b)215		return err216	})217	if err != nil {218		return nil, err219	}220	if len(b) == 0 {221		return cuckoo.NewFilter(CuckooCapacity), nil222	}223	return cuckoo.Decode(b)224}225func saveCuckoo(db *badger.DB, f *cuckoo.Filter) {226	log.Print("INFO: saving Cuckoo..")227	err := db.Update(func(txn *badger.Txn) error {228		return txn.Set([]byte("Cuckoo"), f.Encode())229	})230	if err != nil {231		log.Printf("ERROR: saving Cuckoo failed: %v", err.Error())232	}233	log.Print("INFO: cuckoo saved")234}235func checkError(err error) {236	if err != nil {237		log.Fatal(err)238	}239}240func makeContext() context.Context {241	ctx := context.Background()242	ctx, cancel := context.WithCancel(ctx)243	c := make(chan os.Signal, 1)244	signal.Notify(c, os.Interrupt)245	go func() {246		<-c247		cancel()248		signal.Stop(c)249	}()250	return ctx251}...

UpdateOnStart

Using AI Code Generation

1import (2func main() {3	fmt.Println("Hello, playground")4}5import (6func main() {7	fmt.Println("Hello, playground")8}9import (10func main() {11	fmt.Println("Hello, playground")12}13import (14func main() {15	fmt.Println("Hello, playground")16}17import (18func main() {19	fmt.Println("Hello, playground")20}21import (22func main() {23	fmt.Println("Hello, playground")24}25import (26func main() {27	fmt.Println("Hello, playground")28}29import (30func main() {31	fmt.Println("Hello, playground")32}33import (34func main() {35	fmt.Println("Hello, playground")36}37import (38func main() {39	fmt.Println("Hello, playground")40}41import (42func main() {43	fmt.Println("Hello, playground")44}45import (46func main() {47	fmt.Println("Hello, playground")48}49import (50func main() {51	fmt.Println("Hello,

UpdateOnStart

Using AI Code Generation

1import (2func main() {3	fmt.Println("Hello World")4}5import (6func main() {7	fmt.Println("Hello World")8}9import (10func main() {11	fmt.Println("Hello World")12}13import (14func main() {15	fmt.Println("Hello World")16}17import (18func main() {19	fmt.Println("Hello World")20}21import (22func main() {23	fmt.Println("Hello World")24}25import (26func main() {27	fmt.Println("Hello World")28}29import (30func main() {31	fmt.Println("Hello World")32}33import (34func main() {35	fmt.Println("Hello World")36}37import (38func main() {39	fmt.Println("Hello World")40}41import (42func main() {43	fmt.Println("Hello World")44}45import (46func main() {47	fmt.Println("Hello World")48}49import (50func main() {51	fmt.Println("Hello World")52}

UpdateOnStart

Using AI Code Generation

1import (2func main() {3	fmt.Println("Hello, playground")4}5import (6func main() {7	fmt.Println("Hello, playground")8}9import (10func main() {11	fmt.Println("Hello, playground")12}13import (14func main() {15	fmt.Println("Hello, playground")16}17import (18func main() {19	fmt.Println("Hello, playground")20}21import (22func main() {23	fmt.Println("Hello, playground")24}25import (26func main() {27	fmt.Println("Hello, playground")28}29import (30func main() {31	fmt.Println("Hello, playground")32}33import (34func main() {35	fmt.Println("Hello, playground")36}37import (38func main() {39	fmt.Println("Hello, playground")40}41import (42func main() {43	fmt.Println("Hello, playground")44}45import (46func main() {47	fmt.Println("Hello, playground")48}49import (50func main() {51	fmt.Println("Hello,

UpdateOnStart

Using AI Code Generation

1import (2func main() {3	fmt.Println("main: starting")4	go UpdateOnStart()5	fmt.Println("main: sleeping")6	time.Sleep(1 * time.Second)7	fmt.Println("main: done")8}9import (10func main() {11	fmt.Println("main: starting")12	go UpdateOnStart()13	fmt.Println("main: sleeping")14	time.Sleep(1 * time.Second)15	fmt.Println("main: done")16}17import (18func main() {19	fmt.Println("main: starting")20	go UpdateOnStart()21	fmt.Println("main: sleeping")22	time.Sleep(1 * time.Second)23	fmt.Println("main: done")24}25import (26func main() {27	fmt.Println("main: starting")28	go UpdateOnStart()29	fmt.Println("main: sleeping")30	time.Sleep(1 * time.Second)31	fmt.Println("main: done")32}33import (34func main() {35	fmt.Println("main: starting")36	go UpdateOnStart()37	fmt.Println("main: sleeping")38	time.Sleep(1 * time.Second)39	fmt.Println("main: done")40}41import (42func main() {43	fmt.Println("main: starting")44	go UpdateOnStart()45	fmt.Println("main: sleeping")46	time.Sleep(1 * time.Second)47	fmt.Println("main: done")48}49import (50func main() {51	fmt.Println("main: starting")52	go UpdateOnStart()53	fmt.Println("main: sleeping")54	time.Sleep(1 * time.Second)55	fmt.Println("main: done")56}57import (

UpdateOnStart

Using AI Code Generation

1import (2func main() {3	f, err := os.Create("test.txt")4	if err != nil {5		fmt.Println(err)6	}7	defer f.Close()8	_, err = f.WriteString("This is line 19	if err != nil {10		fmt.Println(err)11		f.Close()12	}13	_, err = f.WriteString("This is line 214	if err != nil {15		fmt.Println(err)16		f.Close()17	}18	_, err = f.WriteString("This is line 319	if err != nil {20		fmt.Println(err)21		f.Close()22	}23	err = f.Sync()24	if err != nil {25		fmt.Println(err)26		f.Close()27	}28	for {29		_, err = f.Seek(0, 0)30		if err != nil {31			fmt.Println(err)32			f.Close()33		}34		_, err = f.WriteString(time.Now().Format("15:04:05"))35		if err != nil {36			fmt.Println(err)37			f.Close()38		}39		err = f.Sync()40		if err != nil {41			fmt.Println(err)42			f.Close()43		}44		time.Sleep(time.Second)45	}46}

UpdateOnStart

Using AI Code Generation

1import (2type Person struct {3}4func (p *Person) UpdateOnStart() {5	fmt.Println("Starting the update process")6	for i := 0; i < 5; i++ {7		time.Sleep(1 * time.Second)8		fmt.Println("Age is now", p.Age)9	}10	fmt.Println("Update process complete")11}12func main() {13	p := Person{Name: "John", Age: 30}14	go p.UpdateOnStart()15	fmt.Println("Waiting for update to complete")16	time.Sleep(6 * time.Second)17	fmt.Println("Update complete, final age is", p.Age)18}

UpdateOnStart

Using AI Code Generation

1import "fmt"2func main() {3    fmt.Println("Hello, World!")4    z = UpdateOnStart(x, y)5    fmt.Println("Sum is", z)6}7func UpdateOnStart(a, b int) int {8}

UpdateOnStart

Using AI Code Generation

1import (2type Student struct {3}4func main() {5	st := Student{Name: "Raj", Age: 20, RollNo: 101}6	st.UpdateOnStart()7	fmt.Println("Name:", st.Name)8	fmt.Println("Age:", st.Age)9	fmt.Println("RollNo:", st.RollNo)10}11func (st *Student) UpdateOnStart() {12	v := reflect.ValueOf(st).Elem()13	t := v.Type()14	for i := 0; i < t.NumField(); i++ {15		f := t.Field(i)16		if tag := f.Tag.Get("updateonstart"); tag == "true" {

UpdateOnStart

Using AI Code Generation

1import "fmt"2func main() {3    obj.UpdateOnStart()4}5import "fmt"6func main() {7    obj.UpdateOnStart()8}9import "fmt"10func main() {11    obj.UpdateOnStart()12}13import "fmt"14func main() {15    obj.UpdateOnStart()16}17import "fmt"18func main() {19    obj.UpdateOnStart()20}21import "fmt"22func main() {23    obj.UpdateOnStart()24}25import "fmt"26func main() {27    obj.UpdateOnStart()28}29import "fmt"30func main() {31    obj.UpdateOnStart()32}33import "fmt"34func main() {35    obj.UpdateOnStart()36}37import "fmt"38func main() {39    obj.UpdateOnStart()40}

UpdateOnStart

Using AI Code Generation

1import (2func main() {3fmt.Println("Starting the application...")4UpdateOnStart("Starting the application...")5fmt.Println("Application started successfully")6UpdateOnStart("Application started successfully")7}8import (9func main() {10fmt.Println("Starting the application...")11UpdateOnStart("Starting the application...")12fmt.Println("Application started successfully")13UpdateOnStart("Application started successfully")14}15import (16func main() {17fmt.Println("Starting the application...")18UpdateOnStart("Starting the application...")19fmt.Println("Application started successfully")20UpdateOnStart("Application started successfully")21}22import (23func main() {24fmt.Println("Starting the application...")25UpdateOnStart("Starting the application...")26fmt.Println("Application started successfully")27UpdateOnStart("Application started successfully")28}29import (30func main() {31fmt.Println("Starting the application...")32UpdateOnStart("Starting the application...")33fmt.Println("Application started successfully")34UpdateOnStart("Application started successfully")35}36import (37func main() {38fmt.Println("Starting the application...")39UpdateOnStart("Starting the application...")40fmt.Println("Application started successfully")41UpdateOnStart("Application started successfully")42}

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