2 This file is part of systemd.
4 Copyright 2013 Kay Sievers <kay@vrfy.org>
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
23 #include <sys/ioctl.h>
24 #include <linux/input.h>
28 static const struct key *keyboard_lookup_key(const char *str, unsigned len);
29 #include "keyboard-keys-from-name.h"
31 static int install_force_release(struct udev_device *dev, const unsigned *release, unsigned release_count) {
32 struct udev_device *atkbd;
40 atkbd = udev_device_get_parent_with_subsystem_devtype(dev, "serio", NULL);
44 cur = udev_device_get_sysattr_value(atkbd, "force_release");
51 /* copy current content */
52 l = strpcpy(&s, l, cur);
54 /* append new codes */
55 for (i = 0; i < release_count; i++)
56 l = strpcpyf(&s, l, ",%u", release[i]);
58 log_debug("keyboard: updating force-release list with '%s'", codes);
59 ret = udev_device_set_sysattr_value(atkbd, "force_release", codes);
61 log_error_errno(ret, "Error writing force-release attribute: %m");
65 static int builtin_keyboard(struct udev_device *dev, int argc, char *argv[], bool test) {
66 struct udev_list_entry *entry;
71 unsigned map_count = 0;
72 unsigned release[1024];
73 unsigned release_count = 0;
75 udev_list_entry_foreach(entry, udev_device_get_properties_list_entry(dev)) {
77 unsigned scancode, keycode_num;
82 key = udev_list_entry_get_name(entry);
83 if (!startswith(key, "KEYBOARD_KEY_"))
86 /* KEYBOARD_KEY_<hex scan code>=<key identifier string> */
87 scancode = strtoul(key + 13, &endptr, 16);
88 if (endptr[0] != '\0') {
89 log_error("Error, unable to parse scan code from '%s'", key);
93 keycode = udev_list_entry_get_value(entry);
95 /* a leading '!' needs a force-release entry */
96 if (keycode[0] == '!') {
99 release[release_count] = scancode;
100 if (release_count < ELEMENTSOF(release)-1)
103 if (keycode[0] == '\0')
107 /* translate identifier to key code */
108 k = keyboard_lookup_key(keycode, strlen(keycode));
112 /* check if it's a numeric code already */
113 keycode_num = strtoul(keycode, &endptr, 0);
114 if (endptr[0] !='\0') {
115 log_error("Error, unknown key identifier '%s'", keycode);
120 map[map_count].scan = scancode;
121 map[map_count].key = keycode_num;
122 if (map_count < ELEMENTSOF(map)-1)
126 if (map_count > 0 || release_count > 0) {
131 node = udev_device_get_devnode(dev);
133 log_error("Error, no device node for '%s'", udev_device_get_syspath(dev));
137 fd = open(udev_device_get_devnode(dev), O_RDWR|O_CLOEXEC|O_NONBLOCK|O_NOCTTY);
139 log_error_errno(errno, "Error, opening device '%s': %m", node);
143 /* install list of map codes */
144 for (i = 0; i < map_count; i++) {
145 log_debug("keyboard: mapping scan code %d (0x%x) to key code %d (0x%x)",
146 map[i].scan, map[i].scan, map[i].key, map[i].key);
147 if (ioctl(fd, EVIOCSKEYCODE, &map[i]) < 0)
148 log_error_errno(errno, "Error calling EVIOCSKEYCODE on device node '%s' (scan code 0x%x, key code %d): %m", node, map[i].scan, map[i].key);
151 /* install list of force-release codes */
152 if (release_count > 0)
153 install_force_release(dev, release, release_count);
161 const struct udev_builtin udev_builtin_keyboard = {
163 .cmd = builtin_keyboard,
164 .help = "Keyboard scan code to key mapping",