// main.m // pnp // // Created by Sharath Menon on 22/09/22. // #import <Foundation/Foundation.h> #import <IOUSBHost/IOUSBHost.h> #include <IOKit/IOTypes.h> #include <dispatch/dispatch.h> #include <IOKit/usb/IOUSBLib.h> #ifdef __OBJC__ @class IOUSBHostDevice; typedef IOUSBHostDevice * USBHostDevPtr; #else typedef void * USBHostDevPtr; #endif USBHostDevPtr mUSBDevice; dispatch_queue_t mQueue; //boost::function<void()> mCallback; int captureDevice(io_service_t aService) { NSError* error = nil; IOUSBHostInterestHandler handler = ^void(IOUSBHostObject* hostObject, uint32_t messageType, void* _Nullable messageArgument) { if( messageType == kIOMessageServiceIsTerminated ) { // The callback will eventually take care of cleaning up the object // mCallback(); NSLog(@"if PNP device removed"); } NSLog(@"PNP device removed"); }; // Create the device with IOUSBHostObjectInitOptionsDeviceCapture to get exclusive access to the device IOUSBHostDevice* device = [[IOUSBHostDevice alloc] initWithIOService:aService options:IOUSBHostObjectInitOptionsDeviceCapture queue:mQueue error:&error interestHandler:handler]; if(device == NULL) { return -1; } mUSBDevice = device; // configureDevice(aService); return 0; } int main(int argc, const char * argv[]) { @autoreleasepool { // insert code here... mQueue = dispatch_queue_create("DeviceQueue", DISPATCH_QUEUE_SERIAL); NSLog(@"Hello, World!"); CFMutableDictionaryRef RefMatchingDict = IOServiceMatching( kIOUSBDeviceClassName ); io_iterator_t USBDevices; IOServiceGetMatchingServices( kIOMasterPortDefault, RefMatchingDict, &USBDevices ); // IOServiceGetMatchingServices( kIOMainPortDefault, RefMatchingDict, &USBDevices ); io_object_t USBDevice; while ( ( USBDevice = IOIteratorNext( USBDevices ) ) ) { io_string_t strDevPath; IORegistryEntryGetPath( USBDevice, kIOServicePlane, strDevPath ); captureDevice(USBDevice); IOObjectRelease( USBDevice ); } IOObjectRelease( USBDevices ); // USBDevices = NULL; } return 0; } Hey all, I have been seeing a weird issues while using IOUSBHost framework. Whenever i run the given sample code on M1 machine it works perfectly fine; but the same on an Intel machine is giving the below error. The weirdest part is when i run this on catalina with xcode 11.6 (Intel machine) it works again. My process is running as root and not sandboxed so i would not be requiring any entitlements as mentioned in the doc for using IOUSBHostObjectInitOptionsDeviceCapture. Thoughts??? * @enum IOUSBHostObjectInitOptions * @brief Options for <code>initWithIOService:options:queue:error:interestHandler</code> * @constant IOUSBHostObjectInitOptionsDeviceCapture Callers must have the "com.apple.vm.device-access" entitlement * and the IOUSBHostDevice IOService object needs to have successfully been authorized by IOServiceAuthorize(). * If the caller has root privelages the entitlement and authorization is not needed. Using this option * will terminate all clients and drivers of the IOUSBHostDevice and associated IOUSBHostInterface clients * besides the caller. * Upon <code>destroy</code> of the IOUSBHostDevice, the device will be reset and drivers will be re-registered * for matching. This option is only valid for macOS */ typedef NS_OPTIONS (NSUInteger, IOUSBHostObjectInitOptions) { IOUSBHostObjectInitOptionsNone = 0, IOUSBHostObjectInitOptionsDeviceCapture = (1 << 0) };