post key events via IOHIDPostEvent

brttbndr · Jul 4, 2020 · d20e654 · d20e654
1 parent 30b6c1d
commit d20e654
Showing 1 changed file with 37 additions and 0 deletions.
diff --git a/c_src/keyio_mac.c b/c_src/keyio_mac.c
@@ -1,5 +1,6 @@
 #include <IOKit/hid/IOHIDLib.h>
 #include <IOKit/IOKitLib.h>
+#include <IOKit/hidsystem/IOHIDLib.h>
 #include <float.h>
 
 IOHIDQueueRef queue;
@@ -75,11 +76,47 @@ int release_kb() {
 
 #ifdef STANDALONE
 int main() {
+ /*
  grab_kb();
  struct KeyEvent ke;
  while(1) {
  wait_key(&ke);
  send_key(&ke);
  }
+ */
+ // I think this method works (unless you run as root)
+ // https://github.com/pqrs-org/Karabiner-Elements/blob/de5a74cf5d5d671672369f76495081af2715f2ba/docs/DEVELOPMENT.md
+ // Note that IOHIDPostEvent is marked as deprecated
+ mach_port_t iter = 0, driver = 0, service = 0, master_port = 0;
+ IOReturn r = IOMasterPort(bootstrap_port, &master_port);
+ if(r) return 1;
+ r = IOServiceGetMatchingServices(master_port, IOServiceMatching(kIOHIDSystemClass), &iter);
+ if(r) return 2;
+ service = IOIteratorNext(iter);
+ if(!service) return 3;
+ r = IOServiceOpen(service, mach_task_self(), kIOHIDParamConnectType, &driver);
+ if(r) return 4;
+ //IOHIDDeviceRef device = IOHIDDeviceCreate(kCFAllocatorDefault, service);
+ io_name_t devName;
+ IORegistryEntryGetName(service, devName);
+ printf("Device's name = %s\n", devName);
+ IOGPoint loc;
+ loc.x = 0;
+ loc.y = 0;
+ NXEventData event;
+ event.key.keyCode = 0x17;
+ event.key.origCharCode = 0;
+ event.key.repeat = 0;
+ event.key.charSet = NX_SYMBOLSET;
+ event.key.charCode = 0;
+ event.key.origCharSet = NX_SYMBOLSET;
+ event.key.keyboardType = 0;
+ IOReturn kr = IOHIDPostEvent(driver, NX_KEYDOWN,
+ loc, &event, kNXEventDataVersion,
+ kIOHIDOptionsTypeNone, kIOHIDSetGlobalEventFlags);
+ kr = IOHIDPostEvent(driver, NX_KEYUP,
+ loc, &event, kNXEventDataVersion,
+ kIOHIDOptionsTypeNone, kIOHIDSetGlobalEventFlags);
+ return 0;
 } 
 #endif