}

	return convertESRCH(syscall.Kill(p.Pid, s))
}

func convertESRCH(err error) error {
	if err == syscall.ESRCH {
		return ErrProcessDone
	}
	return err
}

func (p *Process) release() error {
	// We clear the Pid field only for API compatibility. On Unix, Release
	// has always set Pid to -1. Internally, the implementation relies

		return nil, ErrInvalid
	}

	err = syscall.WaitProcess(p.Pid, &waitmsg)
	if err != nil {
		return nil, NewSyscallError("wait", err)
	}

	p.pidDeactivate(statusDone)
	ps = &ProcessState{
		pid:    waitmsg.Pid,
		status: &waitmsg,
	}
	return ps, nil
}

func (p *Process) release() error {
	p.Pid = -1

	// Just mark the PID unusable.
	p.pidDeactivate(statusReleased)

	l := p.local                              // load-consume
	if uintptr(pid) < s {
		return indexLocal(l, pid), pid
	}
	return p.pinSlow()
}

func (p *Pool) pinSlow() (*poolLocal, int) {
	// Retry under the mutex.
	// Can not lock the mutex while pinned.
	runtime_procUnpin()
	allPoolsMu.Lock()
	defer allPoolsMu.Unlock()
	pid := runtime_procPin()
	// poolCleanup won't be called while we are pinned.

	if !pidfdWorks() {
		return 0, false
	}

	return uintptr(*sysAttr.PidFD), true
}

func pidfdFind(pid int) (uintptr, error) {
	if !pidfdWorks() {
		return 0, syscall.ENOSYS
	}

	h, err := unix.PidFDOpen(pid, 0)
	if err != nil {
		return 0, convertESRCH(err)
	}
	return h, nil
}

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

	}
}

// Lookup of a process that does not exist at time of lookup.
func TestProcessAlreadyDone(t *testing.T) {
	// Theoretically MaxInt32 is a valid PID, but the chance of it actually
	// being used is extremely unlikely.
	pid := math.MaxInt32
	if runtime.GOOS == "solaris" || runtime.GOOS == "illumos" {
		// Solaris/Illumos have a lower limit, above which wait returns

		var ok bool
		h, ok = getPidfd(sysattr.Sys)
		if !ok {
			return newPIDProcess(pid), nil
		}
	}

	return newHandleProcess(pid, h), nil
}

func (p *Process) kill() error {
	return p.Signal(Kill)
}

// ProcessState stores information about a process, as reported by Wait.
type ProcessState struct {
	pid    int                // The process's id.
	status syscall.WaitStatus // System-dependent status info.

	syscall.CloseHandle(syscall.Handle(p.handle))
}

func findProcess(pid int) (p *Process, err error) {
	const da = syscall.STANDARD_RIGHTS_READ |
		syscall.PROCESS_QUERY_INFORMATION | syscall.SYNCHRONIZE
	h, e := syscall.OpenProcess(da, false, uint32(pid))
	if e != nil {
		return nil, NewSyscallError("OpenProcess", e)
	}
	return newHandleProcess(pid, uintptr(h)), nil
}

func init() {

	}

	p, err := os.StartProcess(testenv.GoToolPath(t), []string{"go"}, &os.ProcAttr{})
	if err != nil {
		t.Fatalf("starting test process: %v", err)
	}
	p.Wait()

	// Use pid of a non-existing process.
	proc, err := os.FindProcess(p.Pid)
	// FindProcess should never return errors on Unix.
	if err != nil {
		t.Fatalf("FindProcess: got error %v, want <nil>", err)
	}
	// FindProcess should never return nil Process.

        );
    }

    @Provides
    protected DaemonLogFile createDaemonLogFile(DaemonContext daemonContext, DaemonDir daemonDir) {
        final Long pid = daemonContext.getPid();
        String fileName = "daemon-" + (pid == null ? UUID.randomUUID() : pid) + ".out.log";
        return new DaemonLogFile(new File(daemonDir.getVersionedDir(), fileName));
    }

    @Provides

	}
	if runtime.GOARCH == "wasm" {
		t.Skip("Signals send + notify not fully supported om wasm port")
	}

	c := make(chan os.Signal, 1)
	signal.Notify(c, os.Interrupt)
	defer signal.Stop(c)

	p := &os.Process{Pid: os.Getpid()}
	if err := p.Signal(os.Interrupt); err != nil {
		t.Fatalf("Signal got err %v, want nil", err)
	}

	// Verify we actually received the signal.
	select {
	case <-time.After(1 * time.Second):