Можно ли управлять светодиодом CAPS LOCK на OS X?

Here's another tool to control keyboard leds under OSX: https://github.com/busyloop/maclight

MacLight lets you control the keyboard-LEDs (capslock, numlock) on your Mac.

One Python example: http://www.psychicorigami.com/2009/03/01/5k-morse-code-app-using-capslock-led/

It is possible. I am trying to find an app that I found years ago, that could toggle the num lock and caps lock LEDs on my old iBook (10.4). Found that while looking today.

Found it.

• http://osxbook.com/book/bonus/chapter10/kbdleds/
• http://googlemac.blogspot.com/2008/04/manipulating-keyboard-leds-through.html

Needs to be compiled though.

Oh, and HID LED test tool – Xcode example :D

You can manipulate Mac keyboard LEDs with this..

/* * keyboard_leds.c * Manipulate keyboard LEDs (capslock and numlock) programmatically. * * gcc -Wall -o keyboard_leds keyboard_leds.c -framework IOKit * -framework CoreFoundation * * Copyright (c) 2007,2008 Amit Singh. All Rights Reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #define PROGNAME "keyboard_leds" #define PROGVERS "0.1" #include <stdio.h> #include <getopt.h> #include <stdlib.h> #include <sysexits.h> #include <mach/mach_error.h> #include <IOKit/IOCFPlugIn.h> #include <IOKit/hid/IOHIDLib.h> #include <IOKit/hid/IOHIDUsageTables.h> static IOHIDElementCookie capslock_cookie = (IOHIDElementCookie)0; static IOHIDElementCookie numlock_cookie = (IOHIDElementCookie)0; static int capslock_value = -1; static int numlock_value = -1; void usage(void); inline void print_errmsg_if_io_err(int expr, char* msg); inline void print_errmsg_if_err(int expr, char* msg); io_service_t find_a_keyboard(void); void find_led_cookies(IOHIDDeviceInterface122** handle); void create_hid_interface(io_object_t hidDevice, IOHIDDeviceInterface*** hdi); int manipulate_led(UInt32 whichLED, UInt32 value); void usage(void) { fprintf(stderr, "%s (version %s)\n" "Copyright (c) 2007,2008 Amit Singh. All Rights Reserved.\n" "Manipulate keyboard LEDs\n\n" "Usage: %s [OPTIONS...], where OPTIONS is one of the following\n\n" " -c[1|0], --capslock[=1|=0] get or set (on=1, off=0) caps lock LED\n" " -h, --help print this help message and exit\n" " -n[1|0], --numlock[=1|=0] get or set (on=1, off=0) num lock LED\n", PROGNAME, PROGVERS, PROGNAME); } inline void print_errmsg_if_io_err(int expr, char* msg) { IOReturn err = (expr); if (err != kIOReturnSuccess) { fprintf(stderr, "*** %s - %s(%x, %d).\n", msg, mach_error_string(err), err, err & 0xffffff); fflush(stderr); exit(EX_OSERR); } } inline void print_errmsg_if_err(int expr, char* msg) { if (expr) { fprintf(stderr, "*** %s.\n", msg); fflush(stderr); exit(EX_OSERR); } } io_service_t find_a_keyboard(void) { io_service_t result = (io_service_t)0; CFNumberRef usagePageRef = (CFNumberRef)0; CFNumberRef usageRef = (CFNumberRef)0; CFMutableDictionaryRef matchingDictRef = (CFMutableDictionaryRef)0; if (!(matchingDictRef = IOServiceMatching(kIOHIDDeviceKey))) { return result; } UInt32 usagePage = kHIDPage_GenericDesktop; UInt32 usage = kHIDUsage_GD_Keyboard; if (!(usagePageRef = CFNumberCreate(kCFAllocatorDefault, kCFNumberIntType, &usagePage))) { goto out; } if (!(usageRef = CFNumberCreate(kCFAllocatorDefault, kCFNumberIntType, &usage))) { goto out; } CFDictionarySetValue(matchingDictRef, CFSTR(kIOHIDPrimaryUsagePageKey), usagePageRef); CFDictionarySetValue(matchingDictRef, CFSTR(kIOHIDPrimaryUsageKey), usageRef); result = IOServiceGetMatchingService(kIOMasterPortDefault, matchingDictRef); out: if (usageRef) { CFRelease(usageRef); } if (usagePageRef) { CFRelease(usagePageRef); } return result; } void find_led_cookies(IOHIDDeviceInterface122** handle) { IOHIDElementCookie cookie; CFTypeRef object; long number; long usage; long usagePage; CFArrayRef elements; CFDictionaryRef element; IOReturn result; if (!handle || !(*handle)) { return; } result = (*handle)->copyMatchingElements(handle, NULL, &elements); if (result != kIOReturnSuccess) { fprintf(stderr, "Failed to copy cookies.\n"); exit(1); } CFIndex i; for (i = 0; i < CFArrayGetCount(elements); i++) { element = CFArrayGetValueAtIndex(elements, i); object = (CFDictionaryGetValue(element, CFSTR(kIOHIDElementCookieKey))); if (object == 0 || CFGetTypeID(object) != CFNumberGetTypeID()) { continue; } if (!CFNumberGetValue((CFNumberRef) object, kCFNumberLongType, &number)) { continue; } cookie = (IOHIDElementCookie)number; object = CFDictionaryGetValue(element, CFSTR(kIOHIDElementUsageKey)); if (object == 0 || CFGetTypeID(object) != CFNumberGetTypeID()) { continue; } if (!CFNumberGetValue((CFNumberRef)object, kCFNumberLongType, &number)) { continue; } usage = number; object = CFDictionaryGetValue(element,CFSTR(kIOHIDElementUsagePageKey)); if (object == 0 || CFGetTypeID(object) != CFNumberGetTypeID()) { continue; } if (!CFNumberGetValue((CFNumberRef)object, kCFNumberLongType, &number)) { continue; } usagePage = number; if (usagePage == kHIDPage_LEDs) { switch (usage) { case kHIDUsage_LED_NumLock: numlock_cookie = cookie; break; case kHIDUsage_LED_CapsLock: capslock_cookie = cookie; break; default: break; } } } return; } void create_hid_interface(io_object_t hidDevice, IOHIDDeviceInterface*** hdi) { IOCFPlugInInterface** plugInInterface = NULL; io_name_t className; HRESULT plugInResult = S_OK; SInt32 score = 0; IOReturn ioReturnValue = kIOReturnSuccess; ioReturnValue = IOObjectGetClass(hidDevice, className); print_errmsg_if_io_err(ioReturnValue, "Failed to get class name."); ioReturnValue = IOCreatePlugInInterfaceForService( hidDevice, kIOHIDDeviceUserClientTypeID, kIOCFPlugInInterfaceID, &plugInInterface, &score); if (ioReturnValue != kIOReturnSuccess) { return; } plugInResult = (*plugInInterface)->QueryInterface(plugInInterface, CFUUIDGetUUIDBytes(kIOHIDDeviceInterfaceID), (LPVOID)hdi); print_errmsg_if_err(plugInResult != S_OK, "Failed to create device interface.\n"); (*plugInInterface)->Release(plugInInterface); } 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; } static const char *options = "c::hn::"; static struct option long_options[] = { { "capslock", optional_argument, 0, 'c' }, { "help", no_argument, 0, 'h' }, { "numlock", optional_argument, 0, 'n' }, { 0, 0, 0, 0 }, }; int main (int argc, char **argv) { UInt32 whichLED = (UInt32)0; int c, ctr = 0; int target_value = -1; while ((c = getopt_long(argc, argv, options, long_options, NULL)) != -1) { switch (c) { case 0: break; case 'c': ctr++; whichLED = kHIDUsage_LED_CapsLock; if (optarg) { capslock_value = atoi(optarg); target_value = (capslock_value); } break; case 'h': usage(); exit(0); break; case 'n': ctr++; whichLED = kHIDUsage_LED_NumLock; if (optarg) { numlock_value = atoi(optarg); target_value = (numlock_value); } break; default: usage(); exit(1); break; } } if (ctr != 1) { fprintf(stderr, "Missing options or invalid combination of options. " "Try -h for help.\n"); exit(1); } return manipulate_led(whichLED, target_value); } 

To compile and use this script

gcc -Wall -o keyboard_leds keyboard_leds.c \ -framework IOKit -framework CoreFoundation ./keyboard_leds -h ./keyboard_leds -c # query caps lock LED state ./keyboard_leds -c1 # turn caps lock LED on ./keyboard_leds -c0 # turn caps lock LED off