// Keypress
static void postevent_kp(io_connect_t event, int kbflags, int scancode, int down, int is_flags, int is_repeat){
NXEventData kp;
memset(&kp, 0, sizeof(kp));
UInt32 type;
IOOptionBits flags = kbflags;
IOOptionBits options = 0;
if(IS_MEDIA(scancode)){
kp.compound.subType = (scancode != KEY_POWER ? NX_SUBTYPE_AUX_CONTROL_BUTTONS : NX_SUBTYPE_POWER_KEY);
kp.compound.misc.L[0] = (scancode - KEY_MEDIA) << 16 | (down ? 0x0a00 : 0x0b00) | is_repeat;
type = NX_SYSDEFINED;
} else {
if(is_flags){
// Modifier (shift, ctrl, etc)
type = NX_FLAGSCHANGED;
options = kIOHIDSetGlobalEventFlags;
} else
// Standard key
type = down ? NX_KEYDOWN : NX_KEYUP;
kp.key.repeat = is_repeat;
kp.key.keyCode = scancode;
kp.key.origCharSet = kp.key.charSet = NX_ASCIISET;
if(IS_NUMPAD(scancode))
flags |= NX_NUMERICPADMASK;
else if(scancode == kVK_Help)
flags |= NX_HELPMASK;
}
postevent(event, type, &kp, flags, options);
}
// Send keyup events for every scancode in the keymap
void clearkeys(usbdevice* kb){
for(int key = 0; key < N_KEYS_INPUT; key++){
int scan = keymap[key].scan;
if((scan & SCAN_SILENT) || scan == BTN_WHEELUP || scan == BTN_WHEELDOWN || IS_MEDIA(scan))
continue;
postevent_kp(kb->event, 0, scan, 0, 0, 0);
}
}
void clearkeys(usbdevice* kb){
// Send keyup events for every scancode in the keymap
for(int key = 0; key < N_KEYS; key++){
int scan = keymap_system[key].scan;
if(scan < 0 || IS_MEDIA(scan))
continue;
postevent(kb->event, 0, scan, 0, 0, 0);
}
}
// Event helper
void postevent(io_connect_t event, int kbflags, int scancode, int down, int is_flags, int is_repeat){
NXEventData kp;
memset(&kp, 0, sizeof(kp));
UInt32 type;
IOOptionBits flags = kbflags;
IOOptionBits options = 0;
if(IS_MEDIA(scancode)){
kp.compound.subType = NX_SUBTYPE_AUX_CONTROL_BUTTONS;
kp.compound.misc.L[0] = (scancode - KEY_MEDIA) << 16 | (down ? 0x0a00 : 0x0b00) | is_repeat;
type = NX_SYSDEFINED;
} else {
if(is_flags){
// Modifier (shift, ctrl, etc)
type = NX_FLAGSCHANGED;
options = kIOHIDSetGlobalEventFlags;
} else
// Standard key
type = down ? NX_KEYDOWN : NX_KEYUP;
kp.key.repeat = is_repeat;
kp.key.keyCode = scancode;
kp.key.origCharSet = kp.key.charSet = NX_ASCIISET;
if(IS_NUMPAD(scancode))
flags |= NX_NUMERICPADMASK;
else if(scancode == kVK_Help)
flags |= NX_HELPMASK;
}
// HACK: 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;
if(uid != 0)
seteuid(uid);
if(gid != 0)
setegid(gid);
}
kern_return_t res = IOHIDPostEvent(event, type, *(IOGPoint[]){{0, 0}}, &kp, kNXEventDataVersion, flags | NX_NONCOALSESCEDMASK, options);
if(res != KERN_SUCCESS)
printf("Post event failed: %x\n", res);
if(uid != 0)
seteuid(0);
if(gid != 0)
setegid(0);
}
static void postevent_kp(io_connect_t event, int kbflags, int scancode, int down, int is_flags, int is_repeat){
NXEventData kp;
memset(&kp, 0, sizeof(kp));
UInt32 type;
IOOptionBits flags = kbflags;
IOOptionBits options = 0;
if(scancode == KEY_CAPSLOCK){
// Caps lock emits NX_FLAGSCHANGED when pressed, but also NX_SYSDEFINED on both press and release
kp.compound.subType = NX_SUBTYPE_AUX_CONTROL_BUTTONS;
kp.compound.misc.L[0] = aux_key_data(NX_KEYTYPE_CAPS_LOCK, down, is_repeat);
postevent(event, NX_SYSDEFINED, &kp, flags, options, 1);
if(!down)
return;
memset(&kp, 0, sizeof(kp));
}
if(IS_MEDIA(scancode)){
kp.compound.subType = (scancode != KEY_POWER ? NX_SUBTYPE_AUX_CONTROL_BUTTONS : NX_SUBTYPE_POWER_KEY);
kp.compound.misc.L[0] = aux_key_data(scancode - KEY_MEDIA, down, is_repeat);
type = NX_SYSDEFINED;
} else {
if(is_flags){
// Modifier (shift, ctrl, etc)
type = NX_FLAGSCHANGED;
options = kIOHIDSetGlobalEventFlags;
} else
// Standard key
type = down ? NX_KEYDOWN : NX_KEYUP;
kp.key.repeat = is_repeat;
kp.key.keyCode = scancode;
kp.key.origCharSet = kp.key.charSet = NX_ASCIISET;
if(IS_NUMPAD(scancode))
flags |= NX_NUMERICPADMASK;
else if(scancode == kVK_Help)
flags |= NX_HELPMASK;
}
postevent(event, type, &kp, flags, options, !down || is_repeat);
// Don't print errors on key up or key repeat ^
}