Ejemplo n.º 1
0
static int setup_led(void)
{
	static int initialized = 0;
	if(initialized)
		return kIOReturnSuccess;
	initialized = 1;
	
    IOReturn               ioReturnValue = kIOReturnError;
	if (!(hidService = find_a_keyboard())) {
        fprintf(stderr, "No keyboard found.\n");
        return ioReturnValue;
    }
	
    hidDevice = (io_object_t)hidService;
	
    create_hid_interface(hidDevice, &hidDeviceInterface);
	
    find_led_cookies((IOHIDDeviceInterface122 **)hidDeviceInterface);
	
    ioReturnValue = IOObjectRelease(hidDevice);
    if (ioReturnValue != kIOReturnSuccess) {
        goto out;
    }
	
    ioReturnValue = kIOReturnError;
	
    if (hidDeviceInterface == NULL) {
        fprintf(stderr, "Failed to create HID device interface.\n");
        return ioReturnValue;
    }
	
    ioReturnValue = (*hidDeviceInterface)->open(hidDeviceInterface, 0);
    if (ioReturnValue != kIOReturnSuccess) {
        fprintf(stderr, "Failed to open HID device interface.\n");
        goto out;
    }
	
out:
	if(ioReturnValue != kIOReturnSuccess)
		(void)(*hidDeviceInterface)->Release(hidDeviceInterface);
	
	return ioReturnValue;
}
Ejemplo n.º 2
0
int
manipulate_led(UInt32 whichLED, UInt32 value)
{
    io_service_t           hidService = (io_service_t)0;
    io_object_t            hidDevice = (io_object_t)0;
    IOHIDDeviceInterface **hidDeviceInterface = NULL;
    IOReturn               ioReturnValue = kIOReturnError;
    IOHIDElementCookie     theCookie = (IOHIDElementCookie)0;
    IOHIDEventStruct       theEvent;

    if (!(hidService = find_a_keyboard())) {
        fprintf(stderr, "No keyboard found.\n");
        return ioReturnValue;
    }

    hidDevice = (io_object_t)hidService;

    create_hid_interface(hidDevice, &hidDeviceInterface);

    find_led_cookies((IOHIDDeviceInterface122 **)hidDeviceInterface);

    ioReturnValue = IOObjectRelease(hidDevice);
    if (ioReturnValue != kIOReturnSuccess) {
        goto out;
    }

    ioReturnValue = kIOReturnError;

    if (hidDeviceInterface == NULL) {
        fprintf(stderr, "Failed to create HID device interface.\n");
        return ioReturnValue;
    }

    if (whichLED == kHIDUsage_LED_NumLock) {
        theCookie = numlock_cookie;
    } else if (whichLED == kHIDUsage_LED_CapsLock) {
        theCookie = capslock_cookie;
    }

    if (theCookie == 0) {
        fprintf(stderr, "Bad or missing LED cookie.\n");
        goto out;
    }

    ioReturnValue = (*hidDeviceInterface)->open(hidDeviceInterface, 0);
    if (ioReturnValue != kIOReturnSuccess) {
        fprintf(stderr, "Failed to open HID device interface.\n");
        goto out;
    }

    ioReturnValue = (*hidDeviceInterface)->getElementValue(hidDeviceInterface,
                                               theCookie, &theEvent);
    if (ioReturnValue != kIOReturnSuccess) {
        (void)(*hidDeviceInterface)->close(hidDeviceInterface);
        goto out;
    }

    fprintf(stdout, "%s\n", (theEvent.value) ? "on" : "off");
    if (value != -1) {
        if (theEvent.value != value) {
            theEvent.value = value;
            ioReturnValue = (*hidDeviceInterface)->setElementValue(
                                hidDeviceInterface, theCookie,
                                &theEvent, 0, 0, 0, 0);
            if (ioReturnValue == kIOReturnSuccess) {
                fprintf(stdout, "%s\n", (theEvent.value) ? "on" : "off");
            }
        }
    }

    ioReturnValue = (*hidDeviceInterface)->close(hidDeviceInterface);

out:
    (void)(*hidDeviceInterface)->Release(hidDeviceInterface);

    return ioReturnValue;
}