The defines
KEY_MAX
KEY_CNT
KEY_MIN_INTERESTING
BTN_MISC
BTN_MOUSE
BTN_JOYSTICK
BTN_GAMEPAD
BTN_DIGI
BTN_WHEEL
BTN_TRIGGER_HAPPY
mark start/end of key blocks and do not designate events.
Exclude them from the list of recognized key events.
#!/bin/sh -eu
-$1 -dM -include linux/input.h - </dev/null | \
- awk '/^#define[ \t]+(KEY|BTN)_[^ ]+[ \t]+[0-9BK]/ { if ($2 != "KEY_MAX") { print $2 } }'
+$1 -dM -include linux/input.h - </dev/null | awk '
+ /\<(KEY_(MAX|MIN_INTERESTING))|(BTN_(MISC|MOUSE|JOYSTICK|GAMEPAD|DIGI|WHEEL|TRIGGER_HAPPY))\>/ { next }
+ /^#define[ \t]+(KEY|BTN)_[^ ]+[ \t]+[0-9BK]/ { print $2 }
+'