How to use exec method of ipc Package

Best Syzkaller code snippet using ipc.exec

proc.go

Source:proc.go Github

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...11 "syscall"12 "time"13 "strings"14 // "bufio"15 "os/exec"16 "github.com/google/syzkaller/pkg/cover"17 "github.com/google/syzkaller/pkg/hash"18 "github.com/google/syzkaller/pkg/ipc"19 "github.com/google/syzkaller/pkg/log"20 "github.com/google/syzkaller/pkg/rpctype"21 "github.com/google/syzkaller/pkg/signal"22 "github.com/google/syzkaller/prog"23)24// Proc represents a single fuzzing process (executor).25type Proc struct {26 fuzzer *Fuzzer27 pid int28 env *ipc.Env29 rnd *rand.Rand30 execOpts *ipc.ExecOpts31 execOptsCover *ipc.ExecOpts32 execOptsComps *ipc.ExecOpts33 execOptsNoCollide *ipc.ExecOpts34}35func newProc(fuzzer *Fuzzer, pid int) (*Proc, error) {36 env, err := ipc.MakeEnv(fuzzer.config, pid)37 if err != nil {38 return nil, err39 }40 rnd := rand.New(rand.NewSource(time.Now().UnixNano() + int64(pid)*1e12))41 execOptsNoCollide := *fuzzer.execOpts42 execOptsNoCollide.Flags &= ^ipc.FlagCollide43 execOptsCover := execOptsNoCollide44 execOptsCover.Flags |= ipc.FlagCollectCover45 execOptsComps := execOptsNoCollide46 execOptsComps.Flags |= ipc.FlagCollectComps47 proc := &Proc{48 fuzzer: fuzzer,49 pid: pid,50 env: env,51 rnd: rnd,52 execOpts: fuzzer.execOpts,53 execOptsCover: &execOptsCover,54 execOptsComps: &execOptsComps,55 execOptsNoCollide: &execOptsNoCollide,56 }57 return proc, nil58}59func (proc *Proc) loop() {60 generatePeriod := 10061 if proc.fuzzer.config.Flags&ipc.FlagSignal == 0 {62 // If we don't have real coverage signal, generate programs more frequently63 // because fallback signal is weak.64 generatePeriod = 265 }66 for i := 0; ; i++ {67 item := proc.fuzzer.workQueue.dequeue()68 if item != nil {69 switch item := item.(type) {70 case *WorkTriage:71 proc.triageInput(item)72 case *WorkCandidate:73 proc.execute(proc.execOpts, item.p, item.flags, StatCandidate)74 case *WorkSmash:75 proc.smashInput(item)76 default:77 log.Fatalf("unknown work type: %#v", item)78 }79 continue80 }81 ct := proc.fuzzer.choiceTable82 fuzzerSnapshot := proc.fuzzer.snapshot()83 if len(fuzzerSnapshot.corpus) == 0 || i%generatePeriod == 0 {84 // Generate a new prog.85 p := proc.fuzzer.target.Generate(proc.rnd, prog.RecommendedCalls, ct)86 log.Logf(1, "#%v: generated", proc.pid)87 proc.execute(proc.execOpts, p, ProgNormal, StatGenerate)88 } else {89 // Mutate an existing prog.90 p := fuzzerSnapshot.chooseProgram(proc.rnd).Clone()91 p.Mutate(proc.rnd, prog.RecommendedCalls, ct, fuzzerSnapshot.corpus)92 log.Logf(1, "#%v: mutated", proc.pid)93 proc.execute(proc.execOpts, p, ProgNormal, StatFuzz)94 }95 }96}97func (proc *Proc) triageInput(item *WorkTriage) {98 log.Logf(1, "#%v: triaging type=%x", proc.pid, item.flags)99 prio := signalPrio(item.p, &item.info, item.call)100 inputSignal := signal.FromRaw(item.info.Signal, prio)101 newSignal := proc.fuzzer.corpusSignalDiff(inputSignal)102 if newSignal.Empty() {103 return104 }105 callName := ".extra"106 logCallName := "extra"107 if item.call != -1 {108 callName = item.p.Calls[item.call].Meta.Name109 logCallName = fmt.Sprintf("call #%v %v", item.call, callName)110 }111 log.Logf(3, "triaging input for %v (new signal=%v)", logCallName, newSignal.Len())112 var inputCover cover.Cover113 const (114 signalRuns = 3115 minimizeAttempts = 3116 )117 // Compute input coverage and non-flaky signal for minimization.118 notexecuted := 0119 for i := 0; i < signalRuns; i++ {120 info := proc.executeRaw(proc.execOptsCover, item.p, StatTriage)121 if !reexecutionSuccess(info, &item.info, item.call) {122 // The call was not executed or failed.123 notexecuted++124 if notexecuted > signalRuns/2+1 {125 return // if happens too often, give up126 }127 continue128 }129 thisSignal, thisCover := getSignalAndCover(item.p, info, item.call)130 newSignal = newSignal.Intersection(thisSignal)131 // Without !minimized check manager starts losing some considerable amount132 // of coverage after each restart. Mechanics of this are not completely clear.133 if newSignal.Empty() && item.flags&ProgMinimized == 0 {134 return135 }136 inputCover.Merge(thisCover)137 }138 if item.flags&ProgMinimized == 0 {139 item.p, item.call = prog.Minimize(item.p, item.call, false,140 func(p1 *prog.Prog, call1 int) bool {141 for i := 0; i < minimizeAttempts; i++ {142 info := proc.execute(proc.execOptsNoCollide, p1, ProgNormal, StatMinimize)143 if !reexecutionSuccess(info, &item.info, call1) {144 // The call was not executed or failed.145 continue146 }147 thisSignal, _ := getSignalAndCover(p1, info, call1)148 if newSignal.Intersection(thisSignal).Len() == newSignal.Len() {149 return true150 }151 }152 return false153 })154 }155 data := item.p.Serialize()156 sig := hash.Hash(data)157 log.Logf(2, "added new input for %v to corpus:\n%s", logCallName, data)158 proc.fuzzer.sendInputToManager(rpctype.RPCInput{159 Call: callName,160 Prog: data,161 Signal: inputSignal.Serialize(),162 Cover: inputCover.Serialize(),163 })164 proc.fuzzer.addInputToCorpus(item.p, inputSignal, sig)165 if item.flags&ProgSmashed == 0 {166 proc.fuzzer.workQueue.enqueue(&WorkSmash{item.p, item.call})167 }168}169func reexecutionSuccess(info *ipc.ProgInfo, oldInfo *ipc.CallInfo, call int) bool {170 if info == nil || len(info.Calls) == 0 {171 return false172 }173 if call != -1 {174 // Don't minimize calls from successful to unsuccessful.175 // Successful calls are much more valuable.176 if oldInfo.Errno == 0 && info.Calls[call].Errno != 0 {177 return false178 }179 return len(info.Calls[call].Signal) != 0180 }181 return len(info.Extra.Signal) != 0182}183func getSignalAndCover(p *prog.Prog, info *ipc.ProgInfo, call int) (signal.Signal, []uint32) {184 inf := &info.Extra185 if call != -1 {186 inf = &info.Calls[call]187 }188 return signal.FromRaw(inf.Signal, signalPrio(p, inf, call)), inf.Cover189}190func (proc *Proc) smashInput(item *WorkSmash) {191 if proc.fuzzer.faultInjectionEnabled && item.call != -1 {192 proc.failCall(item.p, item.call)193 }194 if proc.fuzzer.comparisonTracingEnabled && item.call != -1 {195 proc.executeHintSeed(item.p, item.call)196 }197 fuzzerSnapshot := proc.fuzzer.snapshot()198 for i := 0; i < 100; i++ {199 p := item.p.Clone()200 p.Mutate(proc.rnd, prog.RecommendedCalls, proc.fuzzer.choiceTable, fuzzerSnapshot.corpus)201 log.Logf(1, "#%v: smash mutated", proc.pid)202 proc.execute(proc.execOpts, p, ProgNormal, StatSmash)203 }204}205func (proc *Proc) failCall(p *prog.Prog, call int) {206 for nth := 0; nth < 100; nth++ {207 log.Logf(1, "#%v: injecting fault into call %v/%v", proc.pid, call, nth)208 opts := *proc.execOpts209 opts.Flags |= ipc.FlagInjectFault210 opts.FaultCall = call211 opts.FaultNth = nth212 info := proc.executeRaw(&opts, p, StatSmash)213 if info != nil && len(info.Calls) > call && info.Calls[call].Flags&ipc.CallFaultInjected == 0 {214 break215 }216 }217}218func (proc *Proc) executeHintSeed(p *prog.Prog, call int) {219 log.Logf(1, "#%v: collecting comparisons", proc.pid)220 // First execute the original program to dump comparisons from KCOV.221 info := proc.execute(proc.execOptsComps, p, ProgNormal, StatSeed)222 if info == nil {223 return224 }225 // Then mutate the initial program for every match between226 // a syscall argument and a comparison operand.227 // Execute each of such mutants to check if it gives new coverage.228 p.MutateWithHints(call, info.Calls[call].Comps, func(p *prog.Prog) {229 log.Logf(1, "#%v: executing comparison hint", proc.pid)230 proc.execute(proc.execOpts, p, ProgNormal, StatHint)231 })232}233func (proc *Proc) execute(execOpts *ipc.ExecOpts, p *prog.Prog, flags ProgTypes, stat Stat) *ipc.ProgInfo {234 info := proc.executeRaw(execOpts, p, stat)235 calls, extra := proc.fuzzer.checkNewSignal(p, info)236 for _, callIndex := range calls {237 proc.enqueueCallTriage(p, flags, callIndex, info.Calls[callIndex])238 }239 if extra {240 proc.enqueueCallTriage(p, flags, -1, info.Extra)241 }242 return info243}244func (proc *Proc) enqueueCallTriage(p *prog.Prog, flags ProgTypes, callIndex int, info ipc.CallInfo) {245 // info.Signal points to the output shmem region, detach it before queueing.246 info.Signal = append([]uint32{}, info.Signal...)247 // None of the caller use Cover, so just nil it instead of detaching.248 // Note: triage input uses executeRaw to get coverage.249 info.Cover = nil250 proc.fuzzer.workQueue.enqueue(&WorkTriage{251 p: p.Clone(),252 call: callIndex,253 info: info,254 flags: flags,255 })256}257func (proc *Proc) executeRaw(opts *ipc.ExecOpts, p *prog.Prog, stat Stat) *ipc.ProgInfo {258 if opts.Flags&ipc.FlagDedupCover == 0 {259 log.Fatalf("dedup cover is not enabled")260 }261 for _, call := range p.Calls {262 if !proc.fuzzer.choiceTable.Enabled(call.Meta.ID) {263 fmt.Printf("executing disabled syscall %v", call.Meta.Name)264 panic("disabled syscall")265 }266 }267 // Limit concurrency window and do leak checking once in a while.268 ticket := proc.fuzzer.gate.Enter()269 defer proc.fuzzer.gate.Leave(ticket)270 proc.logProgram(opts, p)271 for try := 0; ; try++ {272 atomic.AddUint64(&proc.fuzzer.stats[stat], 1)273 output, info, hanged, err := proc.env.Exec(opts, p)274 // ACHYB275 cmd := exec.Command("dmesg", "-c")276 output, err1 := cmd.Output()277 if err1 != nil {278 log.Logf(0, "%v", err1.Error())279 }280 281 ls := strings.Split(string(output), "\n")282 for _, l := range ls {283 if strings.Contains(l, "BUG: achyb") {284 s := strings.Index(l, "BUG: achyb")285 l = l[s:]286 a := &rpctype.TriggerArgs{287 KACV: l,288 }289 r := &rpctype.TriggerRes{}290 // r.Has = true291 if err3 := proc.fuzzer.manager.Call("Manager.Trigger", a, r); err3 != nil {292 log.Fatalf("Manager.Trigger call failed: %v", err3)293 }294 if !r.Has {295 log.Logf(0, "%s", l)296 } 297 }298 }299 if err != nil {300 if try > 10 {301 log.Fatalf("executor %v failed %v times:\n%v", proc.pid, try, err)302 }303 log.Logf(4, "fuzzer detected executor failure='%v', retrying #%d", err, try+1)304 debug.FreeOSMemory()305 time.Sleep(time.Second)306 continue307 }308 log.Logf(2, "result hanged=%v: %s", hanged, output)309 return info310 }311}312func (proc *Proc) logProgram(opts *ipc.ExecOpts, p *prog.Prog) {313 if proc.fuzzer.outputType == OutputNone {314 return315 }316 data := p.Serialize()317 strOpts := ""318 if opts.Flags&ipc.FlagInjectFault != 0 {319 strOpts = fmt.Sprintf(" (fault-call:%v fault-nth:%v)", opts.FaultCall, opts.FaultNth)320 }321 // The following output helps to understand what program crashed kernel.322 // It must not be intermixed.323 switch proc.fuzzer.outputType {324 case OutputStdout:325 now := time.Now()326 proc.fuzzer.logMu.Lock()327 fmt.Printf("%02v:%02v:%02v executing program %v%v:\n%s\n",328 now.Hour(), now.Minute(), now.Second(),329 proc.pid, strOpts, data)330 proc.fuzzer.logMu.Unlock()331 case OutputDmesg:332 fd, err := syscall.Open("/dev/kmsg", syscall.O_WRONLY, 0)333 if err == nil {334 buf := new(bytes.Buffer)335 fmt.Fprintf(buf, "syzkaller: executing program %v%v:\n%s\n",336 proc.pid, strOpts, data)337 syscall.Write(fd, buf.Bytes())338 syscall.Close(fd)339 }340 case OutputFile:341 f, err := os.Create(fmt.Sprintf("%v-%v.prog", proc.fuzzer.name, proc.pid))342 if err == nil {343 if strOpts != "" {344 fmt.Fprintf(f, "#%v\n", strOpts)345 }346 f.Write(data)347 f.Close()348 }349 default:...

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execprog.go

Source:execprog.go Github

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1// Copyright 2015 syzkaller project authors. All rights reserved.2// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.3// execprog executes a single program or a set of programs4// and optionally prints information about execution.5package main6import (7 "bytes"8 "flag"9 "fmt"10 "io/ioutil"11 "os"12 "runtime"13 "sync"14 "time"15 "github.com/google/syzkaller/pkg/cover"16 "github.com/google/syzkaller/pkg/csource"17 "github.com/google/syzkaller/pkg/host"18 "github.com/google/syzkaller/pkg/ipc"19 "github.com/google/syzkaller/pkg/ipc/ipcconfig"20 "github.com/google/syzkaller/pkg/log"21 "github.com/google/syzkaller/pkg/osutil"22 "github.com/google/syzkaller/prog"23 _ "github.com/google/syzkaller/sys"24)25var (26 flagOS = flag.String("os", runtime.GOOS, "target os")27 flagArch = flag.String("arch", runtime.GOARCH, "target arch")28 flagCoverFile = flag.String("coverfile", "", "write coverage to the file")29 flagRepeat = flag.Int("repeat", 1, "repeat execution that many times (0 for infinite loop)")30 flagProcs = flag.Int("procs", 1, "number of parallel processes to execute programs")31 flagOutput = flag.Bool("output", false, "write programs and results to stdout")32 flagHints = flag.Bool("hints", false, "do a hints-generation run")33 flagFaultCall = flag.Int("fault_call", -1, "inject fault into this call (0-based)")34 flagFaultNth = flag.Int("fault_nth", 0, "inject fault on n-th operation (0-based)")35 flagEnable = flag.String("enable", "none", "enable only listed additional features")36 flagDisable = flag.String("disable", "none", "enable all additional features except listed")37)38func main() {39 flag.Usage = func() {40 fmt.Fprintf(os.Stderr, "usage: execprog [flags] file-with-programs+\n")41 flag.PrintDefaults()42 csource.PrintAvailableFeaturesFlags()43 }44 flag.Parse()45 if len(flag.Args()) == 0 {46 flag.Usage()47 os.Exit(1)48 }49 featuresFlags, err := csource.ParseFeaturesFlags(*flagEnable, *flagDisable, true)50 if err != nil {51 log.Fatalf("%v", err)52 }53 target, err := prog.GetTarget(*flagOS, *flagArch)54 if err != nil {55 log.Fatalf("%v", err)56 }57 entries := loadPrograms(target, flag.Args())58 if len(entries) == 0 {59 return60 }61 features, err := host.Check(target)62 if err != nil {63 log.Fatalf("%v", err)64 }65 if *flagOutput {66 for _, feat := range features.Supported() {67 log.Logf(0, "%-24v: %v", feat.Name, feat.Reason)68 }69 }70 config, execOpts := createConfig(target, features, featuresFlags)71 if err = host.Setup(target, features, featuresFlags, config.Executor); err != nil {72 log.Fatal(err)73 }74 var gateCallback func()75 if features[host.FeatureLeak].Enabled {76 gateCallback = func() {77 output, err := osutil.RunCmd(10*time.Minute, "", config.Executor, "leak")78 if err != nil {79 os.Stdout.Write(output)80 os.Exit(1)81 }82 }83 }84 ctx := &Context{85 entries: entries,86 config: config,87 execOpts: execOpts,88 gate: ipc.NewGate(2**flagProcs, gateCallback),89 shutdown: make(chan struct{}),90 repeat: *flagRepeat,91 }92 var wg sync.WaitGroup93 wg.Add(*flagProcs)94 for p := 0; p < *flagProcs; p++ {95 pid := p96 go func() {97 defer wg.Done()98 ctx.run(pid)99 }()100 }101 osutil.HandleInterrupts(ctx.shutdown)102 wg.Wait()103}104type Context struct {105 entries []*prog.LogEntry106 config *ipc.Config107 execOpts *ipc.ExecOpts108 gate *ipc.Gate109 shutdown chan struct{}110 logMu sync.Mutex111 posMu sync.Mutex112 repeat int113 pos int114 lastPrint time.Time115}116func (ctx *Context) run(pid int) {117 env, err := ipc.MakeEnv(ctx.config, pid)118 if err != nil {119 log.Fatalf("failed to create ipc env: %v", err)120 }121 defer env.Close()122 for {123 select {124 case <-ctx.shutdown:125 return126 default:127 }128 idx := ctx.getProgramIndex()129 if ctx.repeat > 0 && idx >= len(ctx.entries)*ctx.repeat {130 return131 }132 entry := ctx.entries[idx%len(ctx.entries)]133 ctx.execute(pid, env, entry)134 }135}136func (ctx *Context) execute(pid int, env *ipc.Env, entry *prog.LogEntry) {137 // Limit concurrency window.138 ticket := ctx.gate.Enter()139 defer ctx.gate.Leave(ticket)140 callOpts := ctx.execOpts141 if *flagFaultCall == -1 && entry.Fault {142 newOpts := *ctx.execOpts143 newOpts.Flags |= ipc.FlagInjectFault144 newOpts.FaultCall = entry.FaultCall145 newOpts.FaultNth = entry.FaultNth146 callOpts = &newOpts147 }148 if *flagOutput {149 ctx.logProgram(pid, entry.P, callOpts)150 }151 output, info, hanged, err := env.Exec(callOpts, entry.P)152 if ctx.config.Flags&ipc.FlagDebug != 0 || err != nil {153 log.Logf(0, "result: hanged=%v err=%v\n\n%s", hanged, err, output)154 }155 if info != nil {156 ctx.printCallResults(info)157 if *flagHints {158 ctx.printHints(entry.P, info)159 }160 if *flagCoverFile != "" {161 ctx.dumpCoverage(*flagCoverFile, info)162 }163 } else {164 log.Logf(1, "RESULT: no calls executed")165 }166}167func (ctx *Context) logProgram(pid int, p *prog.Prog, callOpts *ipc.ExecOpts) {168 strOpts := ""169 if callOpts.Flags&ipc.FlagInjectFault != 0 {170 strOpts = fmt.Sprintf(" (fault-call:%v fault-nth:%v)",171 callOpts.FaultCall, callOpts.FaultNth)172 }173 data := p.Serialize()174 ctx.logMu.Lock()175 log.Logf(0, "executing program %v%v:\n%s", pid, strOpts, data)176 ctx.logMu.Unlock()177}178func (ctx *Context) printCallResults(info *ipc.ProgInfo) {179 for i, inf := range info.Calls {180 if inf.Flags&ipc.CallExecuted == 0 {181 continue182 }183 flags := ""184 if inf.Flags&ipc.CallFinished == 0 {185 flags += " unfinished"186 }187 if inf.Flags&ipc.CallBlocked != 0 {188 flags += " blocked"189 }190 if inf.Flags&ipc.CallFaultInjected != 0 {191 flags += " faulted"192 }193 log.Logf(1, "CALL %v: signal %v, coverage %v errno %v%v",194 i, len(inf.Signal), len(inf.Cover), inf.Errno, flags)195 }196}197func (ctx *Context) printHints(p *prog.Prog, info *ipc.ProgInfo) {198 ncomps, ncandidates := 0, 0199 for i := range p.Calls {200 if *flagOutput {201 fmt.Printf("call %v:\n", i)202 }203 comps := info.Calls[i].Comps204 for v, args := range comps {205 ncomps += len(args)206 if *flagOutput {207 fmt.Printf("comp 0x%x:", v)208 for arg := range args {209 fmt.Printf(" 0x%x", arg)210 }211 fmt.Printf("\n")212 }213 }214 p.MutateWithHints(i, comps, func(p *prog.Prog) {215 ncandidates++216 if *flagOutput {217 log.Logf(1, "PROGRAM:\n%s", p.Serialize())218 }219 })220 }221 log.Logf(0, "ncomps=%v ncandidates=%v", ncomps, ncandidates)222}223func (ctx *Context) dumpCallCoverage(coverFile string, info *ipc.CallInfo) {224 if len(info.Cover) == 0 {225 return226 }227 buf := new(bytes.Buffer)228 for _, pc := range info.Cover {229 fmt.Fprintf(buf, "0x%x\n", cover.RestorePC(pc, 0xffffffff))230 }231 err := osutil.WriteFile(coverFile, buf.Bytes())232 if err != nil {233 log.Fatalf("failed to write coverage file: %v", err)234 }235}236func (ctx *Context) dumpCoverage(coverFile string, info *ipc.ProgInfo) {237 for i, inf := range info.Calls {238 log.Logf(0, "call #%v: signal %v, coverage %v", i, len(inf.Signal), len(inf.Cover))239 ctx.dumpCallCoverage(fmt.Sprintf("%v.%v", coverFile, i), &inf)240 }241 log.Logf(0, "extra: signal %v, coverage %v", len(info.Extra.Signal), len(info.Extra.Cover))242 ctx.dumpCallCoverage(fmt.Sprintf("%v.extra", coverFile), &info.Extra)243}244func (ctx *Context) getProgramIndex() int {245 ctx.posMu.Lock()246 idx := ctx.pos247 ctx.pos++248 if idx%len(ctx.entries) == 0 && time.Since(ctx.lastPrint) > 5*time.Second {249 log.Logf(0, "executed programs: %v", idx)250 ctx.lastPrint = time.Now()251 }252 ctx.posMu.Unlock()253 return idx254}255func loadPrograms(target *prog.Target, files []string) []*prog.LogEntry {256 var entries []*prog.LogEntry257 for _, fn := range files {258 data, err := ioutil.ReadFile(fn)259 if err != nil {260 log.Fatalf("failed to read log file: %v", err)261 }262 entries = append(entries, target.ParseLog(data)...)263 }264 log.Logf(0, "parsed %v programs", len(entries))265 return entries266}267func createConfig(target *prog.Target,268 features *host.Features, featuresFlags csource.Features) (269 *ipc.Config, *ipc.ExecOpts) {270 config, execOpts, err := ipcconfig.Default(target)271 if err != nil {272 log.Fatalf("%v", err)273 }274 if config.Flags&ipc.FlagSignal != 0 {275 execOpts.Flags |= ipc.FlagCollectCover276 }277 if *flagCoverFile != "" {278 config.Flags |= ipc.FlagSignal279 execOpts.Flags |= ipc.FlagCollectCover280 execOpts.Flags &^= ipc.FlagDedupCover281 }282 if *flagHints {283 if execOpts.Flags&ipc.FlagCollectCover != 0 {284 execOpts.Flags ^= ipc.FlagCollectCover285 }286 execOpts.Flags |= ipc.FlagCollectComps287 }288 if features[host.FeatureExtraCoverage].Enabled {289 config.Flags |= ipc.FlagExtraCover290 }291 if *flagFaultCall >= 0 {292 execOpts.Flags |= ipc.FlagInjectFault293 execOpts.FaultCall = *flagFaultCall294 execOpts.FaultNth = *flagFaultNth295 }296 if featuresFlags["tun"].Enabled && features[host.FeatureNetInjection].Enabled {297 config.Flags |= ipc.FlagEnableTun298 }299 if featuresFlags["net_dev"].Enabled && features[host.FeatureNetDevices].Enabled {300 config.Flags |= ipc.FlagEnableNetDev301 }302 if featuresFlags["net_reset"].Enabled {303 config.Flags |= ipc.FlagEnableNetReset304 }305 if featuresFlags["cgroups"].Enabled {306 config.Flags |= ipc.FlagEnableCgroups307 }308 if featuresFlags["close_fds"].Enabled {309 config.Flags |= ipc.FlagEnableCloseFds310 }311 if featuresFlags["devlink_pci"].Enabled && features[host.FeatureDevlinkPCI].Enabled {312 config.Flags |= ipc.FlagEnableDevlinkPCI313 }314 return config, execOpts315}...

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exec

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1import (2func main() {3 cmd := exec.Command("ls", "-l")4 stdout, err := cmd.Output()5 if err != nil {6 fmt.Println(err.Error())7 }8 fmt.Println(string(stdout))9}

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exec

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1import (2func main() {3 fmt.Println("start")4 cmd := exec.Command("ls", "-l")5 stdout, err := cmd.StdoutPipe()6 if err != nil {7 log.Fatal(err)8 }9 if err := cmd.Start(); err != nil {10 log.Fatal(err)11 }12", scanner.Text())13 fmt.Println("end")14}15import (16func main() {17 cmd := exec.Command("ls", "-l")18 stdout, err := cmd.StdoutPipe()19 if err != nil {20 log.Fatal(err)21 }22 if err := cmd.Start(); err != nil {23 log.Fatal(err)24 }25 if scanner.Scan() {26 fmt.Printf("%s27", scanner.Text())28 }29}30import (31func main() {32 cmd := exec.Command("ls", "-l")33 stdout, err := cmd.StdoutPipe()34 if err != nil {35 log.Fatal(err)36 }37 if err := cmd.Start(); err != nil {38 log.Fatal(err)39 }40 if scanner.Scan() {41 fmt.Printf("%s42", scanner.Text())43 }44}

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exec

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1import "fmt"2import "os/exec"3import "log"4import "time"5func main() {6 fmt.Println("Go IPC using exec")7 out, err := cmd.Output()8 if err != nil {9 log.Fatal(err)10 }11 time.Sleep(5 * time.Second)12}13import "fmt"14import "os/exec"15import "log"16import "time"17func main() {18 fmt.Println("Go IPC using exec")19 stdin, err := cmd.StdinPipe()20 if err != nil {21 log.Fatal(err)22 }23 go func() {24 defer stdin.Close()25 fmt.Fprintln(stdin, "hello")26 fmt.Fprintln(stdin, "world")27 }()28 out, err := cmd.Output()29 if err != nil {30 log.Fatal(err)31 }32 time.Sleep(5 * time.Second)33}

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exec

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1import (2func main() {3 out, err := exec.Command("1.exe", "1", "2").Output()4 if err != nil {5 fmt.Println(err)6 }7 fmt.Println(string(out))8}

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