/*** This file is part of systemd. Copyright 2013 Kay Sievers <kay@vrfy.org> systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <stdio.h> #include <errno.h> #include <string.h> #include <stdlib.h> #include <fcntl.h> #include <sys/ioctl.h> #include <linux/limits.h> #include <linux/input.h> #include "udev.h" static const struct key *keyboard_lookup_key(const char *str, unsigned int len); #include "keyboard-keys-from-name.h" #include "keyboard-keys-to-name.h" static int install_force_release(struct udev_device *dev, const unsigned int *release, unsigned int release_count) { struct udev_device *atkbd; const char *cur; char codes[4096]; char *s; size_t l; unsigned int i; int ret; atkbd = udev_device_get_parent_with_subsystem_devtype(dev, "serio", NULL); if (!atkbd) return -ENODEV; cur = udev_device_get_sysattr_value(atkbd, "force_release"); if (!cur) return -ENODEV; s = codes; l = sizeof(codes); /* copy current content */ l = strpcpy(&s, l, cur); /* append new codes */ for (i = 0; i < release_count; i++) l = strpcpyf(&s, l, ",%d", release[i]); log_debug("keyboard: updating force-release list with '%s'", codes); ret = udev_device_set_sysattr_value(atkbd, "force_release", codes); if (ret < 0) log_error("Error writing force-release attribute: %s", strerror(-ret)); return ret; } 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; } const struct udev_builtin udev_builtin_keyboard = { .name = "keyboard", .cmd = builtin_keyboard, .help = "keyboard scan code to key mapping", };