import (
	"log"
	"os"
	"runtime/trace"
	"syscall"
	"time"
)

func main() {
	// Create a pipe to block on.
	var p [2]int
	if err := syscall.Pipe(p[:]); err != nil {
		log.Fatalf("failed to create pipe: %v", err)
	}
	rfd, wfd := p[0], p[1]

	// Create a goroutine that blocks on the pipe.
	done := make(chan struct{})
	go func() {
		var data [1]byte
		_, err := syscall.Read(rfd, data[:])

	}
	// windows pipes are expected to use forward slashes: https://learn.microsoft.com/windows/win32/ipc/pipe-names
	// so using `url` like we do on unix gives us unclear benefits - see https://github.com/kubernetes/kubernetes/issues/78628
	// So we just construct the path from scratch.
	// Format: \\ServerName\pipe\PipeName

}

// StdinPipe returns a pipe that will be connected to the command's
// standard input when the command starts.
// The pipe will be closed automatically after [Cmd.Wait] sees the command exit.
// A caller need only call Close to force the pipe to close sooner.
// For example, if the command being run will not exit until standard input
// is closed, the caller must close the pipe.

			outerDone <- true
		}()

		var wg sync.WaitGroup
		done := make(chan bool)

		wg.Add(1)
		go func() {
			<-done
			wg.Done()
		}()

		rp, wp, err := os.Pipe()
		if err != nil {
			log.Fatalf("failed to create pipe: %v", err)
			return
		}
		defer func() {
			rp.Close()
			wp.Close()
		}()
		wg.Add(1)
		go func() {
			var tmp [1]byte
			rp.Read(tmp[:])
			<-done
			wg.Done()

	// Create a goroutine blocked before tracing.
	wg.Add(1)
	go func() {
		<-done
		wg.Done()
	}()

	// Create a goroutine blocked in syscall before tracing.
	rp, wp, err := os.Pipe()
	if err != nil {
		log.Fatalf("failed to create pipe: %v", err)
	}
	defer func() {
		rp.Close()
		wp.Close()
	}()
	wg.Add(1)
	go func() {
		var tmp [1]byte
		rp.Read(tmp[:])
		<-done
		wg.Done()
	}()

		// stderr pipe is closed.
		if ee := new(*exec.ExitError); !errors.As(err, ee) {
			t.Errorf("Wait error = %v; want %T", err, *ee)
		}
	})

	// If the process exits with status 0 but leaves a child behind writing
	// to its output pipes, Wait should only wait for WaitDelay before
	// closing the pipes and returning.  Wait should return ErrWaitDelay

		}
		if err = r.Close(); err != nil {
			t.Errorf("r.Close: %v", err)
		}
	}
}

// Test close on Read side during Read.
func TestPipeReadClose2(t *testing.T) {
	c := make(chan int, 1)
	r, _ := Pipe()
	go delayClose(t, r, c, pipeTest{})
	n, err := r.Read(make([]byte, 64))
	<-c
	if n != 0 || err != ErrClosedPipe {

	}
}

// Test that it's OK to have parallel I/O and Close on a pipe.
func TestPipeIOCloseRace(t *testing.T) {
	// Skip on wasm, which doesn't have pipes.
	if runtime.GOOS == "js" || runtime.GOOS == "wasip1" {
		t.Skipf("skipping on %s: no pipes", runtime.GOOS)
	}
	t.Parallel()

	r, w, err := Pipe()
	if err != nil {
		t.Fatal(err)
	}

	var wg sync.WaitGroup
	wg.Add(3)

	testenv.MustHaveGoBuild(t)
	t.Parallel()

	r, w, err := os.Pipe()
	if err != nil {
		t.Fatalf("Pipe() got err %v, want nil", err)
	}
	defer r.Close()
	defer w.Close()

	p, err := os.StartProcess(testenv.GoToolPath(t), []string{"go"}, &os.ProcAttr{
		// N.B. On Windows, StartProcess requires exactly 3 Files. Pass
		// in a dummy pipe to avoid irrelevant output on the test stdout.
		Files: []*os.File{r, w, w},
	})

			log.Fatalf("opening sidecar log file for child: %v", err)
		}
		defer childLog.Close()
		cmd.Stderr = childLog
	}

	if reportCrashes {
		pipe, err := cmd.StdinPipe()
		if err != nil {
			log.Fatalf("StdinPipe: %v", err)
		}

		crashmonitor.Parent(pipe.(*os.File)) // (this conversion is safe)
	}

	if err := cmd.Start(); err != nil {
		log.Fatalf("can't start telemetry child process: %v", err)
	}