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/>.
25 #include <sys/ioctl.h>
26 #include <linux/limits.h>
27 #include <linux/input.h>
31 static const struct key *keyboard_lookup_key(const char *str, unsigned len);
32 #include "keyboard-keys-from-name.h"
33 #include "keyboard-keys-to-name.h"
35 static int install_force_release(struct udev_device *dev, const unsigned *release, unsigned release_count) {
36 struct udev_device *atkbd;
44 atkbd = udev_device_get_parent_with_subsystem_devtype(dev, "serio", NULL);
48 cur = udev_device_get_sysattr_value(atkbd, "force_release");
55 /* copy current content */
56 l = strpcpy(&s, l, cur);
58 /* append new codes */
59 for (i = 0; i < release_count; i++)
60 l = strpcpyf(&s, l, ",%u", release[i]);
62 log_debug("keyboard: updating force-release list with '%s'", codes);
63 ret = udev_device_set_sysattr_value(atkbd, "force_release", codes);
65 log_error_errno(ret, "Error writing force-release attribute: %m");
69 static int builtin_keyboard(struct udev_device *dev, int argc, char *argv[], bool test) {
70 struct udev_list_entry *entry;
75 unsigned map_count = 0;
76 unsigned release[1024];
77 unsigned release_count = 0;
79 udev_list_entry_foreach(entry, udev_device_get_properties_list_entry(dev)) {
81 unsigned scancode, keycode_num;
86 key = udev_list_entry_get_name(entry);
87 if (!startswith(key, "KEYBOARD_KEY_"))
90 /* KEYBOARD_KEY_<hex scan code>=<key identifier string> */
91 scancode = strtoul(key + 13, &endptr, 16);
92 if (endptr[0] != '\0') {
93 log_error("Error, unable to parse scan code from '%s'", key);
97 keycode = udev_list_entry_get_value(entry);
99 /* a leading '!' needs a force-release entry */
100 if (keycode[0] == '!') {
103 release[release_count] = scancode;
104 if (release_count < ELEMENTSOF(release)-1)
107 if (keycode[0] == '\0')
111 /* translate identifier to key code */
112 k = keyboard_lookup_key(keycode, strlen(keycode));
116 /* check if it's a numeric code already */
117 keycode_num = strtoul(keycode, &endptr, 0);
118 if (endptr[0] !='\0') {
119 log_error("Error, unknown key identifier '%s'", keycode);
124 map[map_count].scan = scancode;
125 map[map_count].key = keycode_num;
126 if (map_count < ELEMENTSOF(map)-1)
130 if (map_count > 0 || release_count > 0) {
135 node = udev_device_get_devnode(dev);
137 log_error("Error, no device node for '%s'", udev_device_get_syspath(dev));
141 fd = open(udev_device_get_devnode(dev), O_RDWR|O_CLOEXEC|O_NONBLOCK|O_NOCTTY);
143 log_error_errno(errno, "Error, opening device '%s': %m", node);
147 /* install list of map codes */
148 for (i = 0; i < map_count; i++) {
149 log_debug("keyboard: mapping scan code %d (0x%x) to key code %d (0x%x)",
150 map[i].scan, map[i].scan, map[i].key, map[i].key);
151 if (ioctl(fd, EVIOCSKEYCODE, &map[i]) < 0)
152 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);
155 /* install list of force-release codes */
156 if (release_count > 0)
157 install_force_release(dev, release, release_count);
165 const struct udev_builtin udev_builtin_keyboard = {
167 .cmd = builtin_keyboard,
168 .help = "Keyboard scan code to key mapping",