kern_return_t
IOHIDSetMouseLocation( io_connect_t connect, int x, int y )
{
NXEventData event;
IOGPoint location = {x,y};
memset(&event, 0, sizeof(event));
return IOHIDPostEvent(connect, NX_NULLEVENT, location, &event, 2, -1, kIOHIDSetCursorPosition);
}
void HIDPostSysDefinedKey(const UInt8 sysKeyCode )
{
NXEventData event;
kern_return_t kr;
IOGPoint loc = { 0, 0 };
bzero(&event, sizeof(NXEventData));
event.compound.subType = sysKeyCode;
kr = IOHIDPostEvent( get_event_driver(), NX_SYSDEFINED, loc, &event,
kNXEventDataVersion, 0, FALSE );
check( KERN_SUCCESS == kr );
}
void HIDPostAuxKey(const UInt8 auxKeyCode )
{
NXEventData event;
kern_return_t kr;
IOGPoint loc = { 0, 0 };
bzero(&event, sizeof(NXEventData));
event.compound.subType = NX_SUBTYPE_AUX_CONTROL_BUTTONS;
event.compound.misc.S[0] = auxKeyCode;
event.compound.misc.C[2] = NX_KEYDOWN;
kr = IOHIDPostEvent( get_event_driver(), NX_SYSDEFINED, loc, &event,
kNXEventDataVersion, 0, FALSE );
check( KERN_SUCCESS == kr );
}
// Event helpers
static void postevent(io_connect_t event, UInt32 type, NXEventData* ev, IOOptionBits flags, IOOptionBits options, int silence_errors){
// Hack #1: IOHIDPostEvent will fail with kIOReturnNotPrivileged if the event doesn't originate from the UID that owns /dev/console
// You'd think being root would be good enough. You'd be wrong. ckb-daemon needs to run as root for other reasons though
// (namely, being able to seize the physical IOHIDDevices) so what we do instead is change our EUID to the appropriate owner,
// post the event, and then change it right back.
// Yeah...
uid_t uid = 0;
gid_t gid = 0;
struct stat file;
if(!stat("/dev/console", &file)){
uid = file.st_uid;
gid = file.st_gid;
}
euid_guard_start;
if(uid != 0)
seteuid(uid);
if(gid != 0)
setegid(gid);
IOGPoint location = {0, 0};
if((options & kIOHIDSetRelativeCursorPosition) && type != NX_MOUSEMOVED){
// Hack #2: IOHIDPostEvent will not accept relative mouse coordinates for any event other than NX_MOUSEMOVED
// So we need to get the current absolute coordinates from CoreGraphics and then modify those...
CGEventRef cge = CGEventCreate(nil);
CGPoint loc = CGEventGetLocation(cge);
CFRelease(cge);
location.x = floor(loc.x + ev->mouseMove.dx);
location.y = floor(loc.y + ev->mouseMove.dy);
options = (options & ~kIOHIDSetRelativeCursorPosition) | kIOHIDSetCursorPosition;
}
kern_return_t res = IOHIDPostEvent(event, type, location, ev, kNXEventDataVersion, flags | NX_NONCOALSESCEDMASK, options);
if(res != kIOReturnSuccess && !silence_errors)
ckb_warn("Post event failed: %x\n", res);
if(uid != 0)
seteuid(0);
if(gid != 0)
setegid(0);
euid_guard_stop;
}
