int pid, sid;
                if (argc != 2) {
                    printf("Expected a pid parameter, but was given %d\\n", argc - 1);
                    return 1;
                } else {
                    pid = atoi(argv[1]);
                }
                pid_t getsid(pid_t pid);
                sid = getsid(pid);
                printf("%d\\n", sid);

}

// PtraceGetRegs386 fetches the registers used by 386 binaries.
func PtraceGetRegs386(pid int, regsout *PtraceRegs386) error {
	return ptracePtr(PTRACE_GETREGS, pid, 0, unsafe.Pointer(regsout))
}

// PtraceSetRegs386 sets the registers used by 386 binaries.
func PtraceSetRegs386(pid int, regs *PtraceRegs386) error {
	return ptracePtr(PTRACE_SETREGS, pid, 0, unsafe.Pointer(regs))
}

// PtraceRegsAmd64 is the registers used by amd64 binaries.

    def "PID can be null"() {
        given:
        def daemonContext = new DefaultDaemonContext(null, null, null, null, null, null, null, false, NativeServicesMode.ENABLED, null)

        when:
        def pid = daemonContext.pid;

        then:
        noExceptionThrown()
        pid == null
    }

    def "PID unboxing should not happen in Status"() {
        given:

// PtraceGetRegsMips fetches the registers used by mips binaries.
func PtraceGetRegsMips(pid int, regsout *PtraceRegsMips) error {
	return ptracePtr(PTRACE_GETREGS, pid, 0, unsafe.Pointer(regsout))
}

// PtraceSetRegsMips sets the registers used by mips binaries.
func PtraceSetRegsMips(pid int, regs *PtraceRegsMips) error {
	return ptracePtr(PTRACE_SETREGS, pid, 0, unsafe.Pointer(regs))
}

        startupInfo.pid == 123
        startupInfo.diagnostics.pid == 123
        startupInfo.diagnostics.daemonLog == dummyFile
    }

    def "null pid is supported"() {
        when:
        def message = message(null, "1234", uuid, 123, addresses, dummyFile)
        def startupInfo = comm.readDiagnostics(message)

        then:
        startupInfo.diagnostics.pid == null
    }

            encoder.writeSmallInt(context.javaVersion.asInt());
            encoder.writeString(context.daemonRegistryDir.getPath());
            encoder.writeBoolean(context.pid != null);
            if (context.pid != null) {
                encoder.writeLong(context.pid);
            }
            encoder.writeBoolean(context.idleTimeout != null);
            if (context.idleTimeout != null) {

                System.out.println("Killing Gradle process with PID " + pid + ": " + line);
                pkill(pid);
            });
        } else {
            forEachLeakingJavaProcess(rootProjectDir, (pid, line) -> {
                System.out.println("A process wasn't shutdown properly in a previous Gradle run. Killing process with PID " + pid + ": " + line);
                pkill(pid);

    @Nullable
    private final Long pid;
    @Nullable
    private final DaemonExpirationStatus status;
    @Nullable
    private final String reason;

    public DaemonStopEvent(Date timestamp, @Nullable Long pid, @Nullable DaemonExpirationStatus status, @Nullable String reason) {
        this.timestamp = timestamp;
        this.status = status;
        this.reason = reason;
        this.pid = pid;
    }

func startProcess(argv0 string, argv []string, attr *ProcAttr) (pid int, err error) {
	type forkRet struct {
		pid int
		err error
	}

	forkc := make(chan forkRet, 1)
	go func() {
		runtime.LockOSThread()
		var ret forkRet

		ret.pid, ret.err = forkExec(argv0, argv, attr)
		// If fork fails there is nothing to wait for.
		if ret.err != nil || ret.pid == 0 {
			forkc <- ret
			return
		}

	}
}

func isProcessRunningInHost(pid int) (bool, error) {
	// Get init pid namespace.
	initPidNs, err := os.Readlink("/proc/1/ns/pid")
	if err != nil {
		return false, fmt.Errorf("failed to find pid namespace of init process")
	}
	klog.V(10).InfoS("Found init PID namespace", "namespace", initPidNs)
	processPidNs, err := os.Readlink(fmt.Sprintf("/proc/%d/ns/pid", pid))
	if err != nil {