HelenOS sources
KC_4 260 uspace/app/calculator/calculator.c case KC_4:
KC_4 329 uspace/app/fontedit/fontedit.c case KC_4:
KC_4 64 uspace/drv/hid/adb-kbd/ctl.c [0x15] = KC_4,
KC_4 61 uspace/drv/hid/atkbd/atkbd.c [0x25] = KC_4,
KC_4 77 uspace/drv/hid/usbhid/kbd/conv.c [0x21] = KC_4,
KC_4 53 uspace/drv/hid/xtkbd/xtkbd.c [0x05] = KC_4,
KC_4 435 uspace/lib/vt/src/vt100.c vt100_key(vt, KM_ALT, KC_4, c);
KC_4 1113 uspace/lib/vt/src/vt100.c vt100_key(vt, 0, KC_4, c);
KC_4 1273 uspace/lib/vt/src/vt100.c vt100_key(vt, KM_SHIFT, KC_4, c);
KC_4 81 uspace/srv/hid/input/ctl/stty.c 0, KC_4, 0x34, GSP_END,
KC_4 143 uspace/srv/hid/input/ctl/stty.c KM_SHIFT, KC_4, 0x24, GSP_END,
KC_4 264 uspace/srv/hid/input/ctl/stty.c KM_ALT, KC_4, 0x1b, 0x34, GSP_END,
KC_4 131 uspace/srv/hid/input/ctl/sun.c [0x21] = KC_4,
KC_4 60 uspace/srv/hid/input/layout/ar.c [KC_4] = '4',
KC_4 118 uspace/srv/hid/input/layout/ar.c [KC_4] = '$',
KC_4 147 uspace/srv/hid/input/layout/cz.c [KC_4] = '4',
KC_4 172 uspace/srv/hid/input/layout/cz.c [KC_4] = L'č',
KC_4 187 uspace/srv/hid/input/layout/cz.c [KC_4] = L'Č',
KC_4 125 uspace/srv/hid/input/layout/fr_azerty.c [KC_4] = '\'',
KC_4 155 uspace/srv/hid/input/layout/fr_azerty.c [KC_4] = '4',
KC_4 125 uspace/srv/hid/input/layout/us_dvorak.c [KC_4] = '4',
KC_4 155 uspace/srv/hid/input/layout/us_dvorak.c [KC_4] = '$',
KC_4 121 uspace/srv/hid/input/layout/us_qwerty.c [KC_4] = '4',
KC_4 150 uspace/srv/hid/input/layout/us_qwerty.c [KC_4] = '$',
HelenOS homepage, sources at GitHub