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67 lines
1.8 KiB
67 lines
1.8 KiB
3 years ago
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// squeeky door laptop hinge haha
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//
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// lmutracker.mm
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//
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// clang -o lmutracker lmutracker.mm -framework IOKit -framework CoreFoundation
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////
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// mplayer -ss 00:00:01.90 -endpos 00:00:02.90 door.mp3
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//
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// via:https://stackoverflow.com/questions/17625495/how-do-you-programmatically-access-the-ambient-light-sensor-on-mac-os-x-10-5
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#include <mach/mach.h>
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#import <IOKit/IOKitLib.h>
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#import <CoreFoundation/CoreFoundation.h>
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static double updateInterval = 0; //0 means only run once
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static io_connect_t dataPort = 0;
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void updateTimerCallBack(CFRunLoopTimerRef timer, void *info) {
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kern_return_t kr;
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uint32_t outputs = 2;
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uint64_t values[outputs];
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kr = IOConnectCallMethod(dataPort, 0, nil, 0, nil, 0, values, &outputs, nil, 0);
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if (kr == KERN_SUCCESS) {
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printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b%8lld", values[0]);
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//return;
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exit(0); // exit program after getting value!
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}
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if (kr == kIOReturnBusy) {
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return;
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}
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mach_error("I/O Kit error:", kr);
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exit(kr);
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}
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int main(void) {
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kern_return_t kr;
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io_service_t serviceObject;
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CFRunLoopTimerRef updateTimer;
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serviceObject = IOServiceGetMatchingService(kIOMasterPortDefault, IOServiceMatching("AppleLMUController"));
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if (!serviceObject) {
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fprintf(stderr, "failed to find ambient light sensors\n");
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exit(1);
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}
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kr = IOServiceOpen(serviceObject, mach_task_self(), 0, &dataPort);
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IOObjectRelease(serviceObject);
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if (kr != KERN_SUCCESS) {
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mach_error("IOServiceOpen:", kr);
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exit(kr);
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}
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setbuf(stdout, NULL);
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printf("%8ld", 0L);
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updateTimer = CFRunLoopTimerCreate(kCFAllocatorDefault,
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CFAbsoluteTimeGetCurrent() + updateInterval, updateInterval,
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0, 0, updateTimerCallBack, NULL);
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CFRunLoopAddTimer(CFRunLoopGetCurrent(), updateTimer, kCFRunLoopDefaultMode);
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CFRunLoopRun();
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exit(0);
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}
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