}
	beforeStart := time.Now()
	if err := cmd.Start(); err != nil {
		t.Fatalf("Failed to start command: %v", err)
	}

	waiting := false
	doneCh := make(chan error, 1)
	t.Cleanup(func() {
		cmd.Process.Kill()
		if waiting {
			<-doneCh
		} else {
			cmd.Wait()
		}
	})

	// Wait for After1 to close its stdout so that we know the runtime's SIGIO
	// handler is registered.
	b, err := io.ReadAll(stdout)

	// Specifies the hostname of the Pod
	// If not specified, the pod's hostname will be set to a system-defined value.
	// +optional
	Hostname string `json:"hostname,omitempty" protobuf:"bytes,16,opt,name=hostname"`
	// If specified, the fully qualified Pod hostname will be "<hostname>.<subdomain>.<pod namespace>.svc.<cluster domain>".
	// If not specified, the pod will not have a domainname at all.
	// +optional

		cmd.Dir = dir
		cmd.Env = append(slices.Clip(env), "PWD="+dir)

		cmd.Cancel = func() error {
			err := cmd.Process.Signal(os.Interrupt)
			if err != nil && !errors.Is(err, os.ErrProcessDone) {
				err = cmd.Process.Kill()
			}
			return err
		}
		// This WaitDelay is arbitrary. After 'hg serve' prints its URL, any further
		// I/O is only for debugging. (The actual output goes through the HTTP URL,
		// not the standard I/O streams.)

	"os/exec"
	"runtime"
	"runtime/debug"
	"strings"
	"sync"
	"syscall"
	"testing"
	"time"
	"unsafe"
)

func init() {
	if runtime.Sigisblocked(int(syscall.SIGQUIT)) {
		// We can't use SIGQUIT to kill subprocesses because
		// it's blocked. Use SIGKILL instead. See issue
		// #19196 for an example of when this happens.
		testenv.Sigquit = syscall.SIGKILL
	}
}

func TestBadOpen(t *testing.T) {

	handle, status := p.handleTransientAcquire()
	switch status {
	case statusDone:
		return ErrProcessDone
	case statusReleased:
		return syscall.EINVAL
	}
	defer p.handleTransientRelease()

	if sig == Kill {
		var terminationHandle syscall.Handle
		e := syscall.DuplicateHandle(^syscall.Handle(0), syscall.Handle(handle), ^syscall.Handle(0), &terminationHandle, syscall.PROCESS_TERMINATE, false, 0)
		if e != nil {

		// than it does for an attempt to access a valid but unmapped address.
		// OS X 10.9.2 mishandles the malformed address case, making it look like
		// a user-generated signal (like someone ran kill -SEGV ourpid).
		// We pass user-generated signals to os/signal, or else ignore them.
		// Doing that here - and returning to the faulting code - results in an

		defer w.Close()
		// Spin before calling Write so that the first ReadFull
		// in the other goroutine will likely be interrupted
		// by a signal.
		sendSomeSignals()
		// This Write will likely be interrupted by a signal
		// as the other goroutine spins in the middle of reading.
		// We write enough data that we should always fill the
		// pipe buffer and need multiple write system calls.

			if not err.Success():
				sys.stderr.write("lldb: failed to launch remote process: %s\n" % (err))
				process.Kill()
				debugger.Terminate()
				sys.exit(1)
		run_program()

exitStatus = process.GetExitStatus()
exitDesc = process.GetExitDescription()
process.Kill()
debugger.Terminate()
if exitStatus == 0 and exitDesc is not None:
	# Ensure tests fail when killed by a signal.
	exitStatus = 123

	cmd.Env = append(slices.Clip(tg.env), tempEnvName()+"="+t.TempDir())

	cmd.SysProcAttr = &syscall.SysProcAttr{
		Setpgid: true,
	}
	cmd.Cancel = func() error {
		pgid := cmd.Process.Pid
		return syscall.Kill(-pgid, syscall.SIGINT)
	}

	pipe, err := cmd.StdoutPipe()
	if err != nil {
		t.Fatal(err)
	}

	t.Logf("running %v", cmd)
	if err := cmd.Start(); err != nil {
		t.Fatal(err)
	}

	}
	return h, nil
}

// _P_PIDFD is used as idtype argument to waitid syscall.
const _P_PIDFD = 3

func (p *Process) pidfdWait() (*ProcessState, error) {
	// When pidfd is used, there is no wait/kill race (described in CL 23967)
	// because the PID recycle issue doesn't exist (IOW, pidfd, unlike PID,
	// is guaranteed to refer to one particular process). Thus, there is no