static int builtin_keyboard(struct udev_device *dev, int argc, char *argv[], bool test) {
        struct udev_list_entry *entry;
        struct {
                unsigned int scan;
                unsigned int key;
        } map[1024];
        unsigned int map_count = 0;
        unsigned int release[1024];
        unsigned int release_count = 0;

        udev_list_entry_foreach(entry, udev_device_get_properties_list_entry(dev)) {
                const char *key;
                unsigned int scancode;
                char *endptr;
                const char *keycode;
                const struct key *k;

                key = udev_list_entry_get_name(entry);
                if (!startswith(key, "KEYBOARD_KEY_"))
                        continue;

                /* KEYBOARD_KEY_<hex scan code>=<key identifier string> */
                scancode = strtoul(key + 13, &endptr, 16);
                if (endptr[0] != '\0') {
                        log_error("Error, unable to parse scan code from '%s'", key);
                        continue;
                }

                keycode = udev_list_entry_get_value(entry);

                /* a leading '!' needs a force-release entry */
                if (keycode[0] == '!') {
                        keycode++;

                        release[release_count] = scancode;
                        if (release_count <  ELEMENTSOF(release)-1)
                                release_count++;

                        if (keycode[0] == '\0')
                                continue;
                }

                /* translate identifier to key code */
                k = keyboard_lookup_key(keycode, strlen(keycode));
                if (!k) {
                        log_error("Error, unknown key identifier '%s'", keycode);
                        continue;
                }

                map[map_count].scan = scancode;
                map[map_count].key = k->id;
                if (map_count < ELEMENTSOF(map)-1)
                        map_count++;
        }

        if (map_count > 0 || release_count > 0) {
                const char *node;
                int fd;
                unsigned int i;

                node = udev_device_get_devnode(dev);
                if (!node) {
                        log_error("Error, no device node for '%s'", udev_device_get_syspath(dev));
                        return EXIT_FAILURE;
                }

                fd = open(udev_device_get_devnode(dev), O_RDWR|O_CLOEXEC|O_NONBLOCK|O_NOCTTY);
                if (fd < 0) {
                        log_error("Error, opening device '%s': %m", node);
                        return EXIT_FAILURE;
                }

                /* install list of map codes */
                for (i = 0; i < map_count; i++) {
                        log_debug("keyboard: mapping scan code %d (0x%x) to key code %d (0x%x)",
                                  map[i].scan, map[i].scan, map[i].key, map[i].key);
                        if (ioctl(fd, EVIOCSKEYCODE, &map[i]) < 0)
                                log_error("Error calling EVIOCSKEYCODE on device node '%s' (scan code 0x%x, key code %d): %m", node, map[i].scan, map[i].key);
                }

                /* install list of force-release codes */
                if (release_count > 0)
                        install_force_release(dev, release, release_count);

                close(fd);
        }

        return EXIT_SUCCESS;
}
static int builtin_keyboard(struct udev_device *dev, int argc, char *argv[], bool test) {
        struct udev_list_entry *entry;
        unsigned release[1024];
        unsigned release_count = 0;
        _cleanup_close_ int fd = -1;
        const char *node;

        node = udev_device_get_devnode(dev);
        if (!node) {
                log_error("No device node for \"%s\"", udev_device_get_syspath(dev));
                return EXIT_FAILURE;
        }

        udev_list_entry_foreach(entry, udev_device_get_properties_list_entry(dev)) {
                const char *key;
                char *endptr;

                key = udev_list_entry_get_name(entry);
                if (startswith(key, "KEYBOARD_KEY_")) {
                        const char *keycode;
                        unsigned scancode;

                        /* KEYBOARD_KEY_<hex scan code>=<key identifier string> */
                        scancode = strtoul(key + 13, &endptr, 16);
                        if (endptr[0] != '\0') {
                                log_warning("Unable to parse scan code from \"%s\"", key);
                                continue;
                        }

                        keycode = udev_list_entry_get_value(entry);

                        /* a leading '!' needs a force-release entry */
                        if (keycode[0] == '!') {
                                keycode++;

                                release[release_count] = scancode;
                                if (release_count <  ELEMENTSOF(release)-1)
                                        release_count++;

                                if (keycode[0] == '\0')
                                        continue;
                        }

                        if (fd == -1) {
                                fd = open_device(node);
                                if (fd < 0)
                                        return EXIT_FAILURE;
                        }

                        map_keycode(fd, node, scancode, keycode);
                } else if (startswith(key, "EVDEV_ABS_")) {
                        unsigned evcode;

                        /* EVDEV_ABS_<EV_ABS code>=<min>:<max>:<res>:<fuzz>:<flat> */
                        evcode = strtoul(key + 10, &endptr, 16);
                        if (endptr[0] != '\0') {
                                log_warning("Unable to parse EV_ABS code from \"%s\"", key);
                                continue;
                        }

                        if (fd == -1) {
                                fd = open_device(node);
                                if (fd < 0)
                                        return EXIT_FAILURE;
                        }

                        override_abs(fd, node, evcode, udev_list_entry_get_value(entry));
                } else if (streq(key, "POINTINGSTICK_SENSITIVITY"))
                        set_trackpoint_sensitivity(dev, udev_list_entry_get_value(entry));
        }

        /* install list of force-release codes */
        if (release_count > 0)
                install_force_release(dev, release, release_count);

        return EXIT_SUCCESS;
}