Line data Source code
1 : /* SPDX-License-Identifier: LGPL-2.1+ */
2 :
3 : #include <errno.h>
4 : #include <fcntl.h>
5 : #include <stdio.h>
6 : #include <stdlib.h>
7 : #include <string.h>
8 : #include <sys/ioctl.h>
9 : #include <linux/input.h>
10 :
11 : #include "device-util.h"
12 : #include "fd-util.h"
13 : #include "parse-util.h"
14 : #include "stdio-util.h"
15 : #include "string-util.h"
16 : #include "strxcpyx.h"
17 : #include "udev-builtin.h"
18 :
19 : static const struct key_name *keyboard_lookup_key(const char *str, GPERF_LEN_TYPE len);
20 : #include "keyboard-keys-from-name.h"
21 :
22 0 : static int install_force_release(sd_device *dev, const unsigned *release, unsigned release_count) {
23 : sd_device *atkbd;
24 : const char *cur;
25 : char codes[4096];
26 : char *s;
27 : size_t l;
28 : unsigned i;
29 : int r;
30 :
31 0 : assert(dev);
32 0 : assert(release);
33 :
34 0 : r = sd_device_get_parent_with_subsystem_devtype(dev, "serio", NULL, &atkbd);
35 0 : if (r < 0)
36 0 : return log_device_error_errno(dev, r, "Failed to get serio parent: %m");
37 :
38 0 : r = sd_device_get_sysattr_value(atkbd, "force_release", &cur);
39 0 : if (r < 0)
40 0 : return log_device_error_errno(atkbd, r, "Failed to get force-release attribute: %m");
41 :
42 0 : s = codes;
43 0 : l = sizeof(codes);
44 :
45 : /* copy current content */
46 0 : l = strpcpy(&s, l, cur);
47 :
48 : /* append new codes */
49 0 : for (i = 0; i < release_count; i++)
50 0 : l = strpcpyf(&s, l, ",%u", release[i]);
51 :
52 0 : log_device_debug(atkbd, "keyboard: updating force-release list with '%s'", codes);
53 0 : r = sd_device_set_sysattr_value(atkbd, "force_release", codes);
54 0 : if (r < 0)
55 0 : return log_device_error_errno(atkbd, r, "Failed to set force-release attribute: %m");
56 :
57 0 : return 0;
58 : }
59 :
60 0 : static int map_keycode(sd_device *dev, int fd, int scancode, const char *keycode) {
61 : struct {
62 : unsigned scan;
63 : unsigned key;
64 : } map;
65 : char *endptr;
66 : const struct key_name *k;
67 : unsigned keycode_num;
68 :
69 : /* translate identifier to key code */
70 0 : k = keyboard_lookup_key(keycode, strlen(keycode));
71 0 : if (k) {
72 0 : keycode_num = k->id;
73 : } else {
74 : /* check if it's a numeric code already */
75 0 : keycode_num = strtoul(keycode, &endptr, 0);
76 0 : if (endptr[0] !='\0')
77 0 : return log_device_error_errno(dev, SYNTHETIC_ERRNO(EINVAL), "Failed to parse key identifier '%s'", keycode);
78 : }
79 :
80 0 : map.scan = scancode;
81 0 : map.key = keycode_num;
82 :
83 0 : log_device_debug(dev, "keyboard: mapping scan code %d (0x%x) to key code %d (0x%x)",
84 : map.scan, map.scan, map.key, map.key);
85 :
86 0 : if (ioctl(fd, EVIOCSKEYCODE, &map) < 0)
87 0 : return log_device_error_errno(dev, errno, "Failed to call EVIOCSKEYCODE with scan code 0x%x, and key code %d: %m", map.scan, map.key);
88 :
89 0 : return 0;
90 : }
91 :
92 0 : static char* parse_token(const char *current, int32_t *val_out) {
93 : char *next;
94 : int32_t val;
95 :
96 0 : if (!current)
97 0 : return NULL;
98 :
99 0 : val = strtol(current, &next, 0);
100 0 : if (*next && *next != ':')
101 0 : return NULL;
102 :
103 0 : if (next != current)
104 0 : *val_out = val;
105 :
106 0 : if (*next)
107 0 : next++;
108 :
109 0 : return next;
110 : }
111 :
112 0 : static int override_abs(sd_device *dev, int fd, unsigned evcode, const char *value) {
113 : struct input_absinfo absinfo;
114 : char *next;
115 : int r;
116 :
117 0 : r = ioctl(fd, EVIOCGABS(evcode), &absinfo);
118 0 : if (r < 0)
119 0 : return log_device_error_errno(dev, errno, "Failed to call EVIOCGABS");
120 :
121 0 : next = parse_token(value, &absinfo.minimum);
122 0 : next = parse_token(next, &absinfo.maximum);
123 0 : next = parse_token(next, &absinfo.resolution);
124 0 : next = parse_token(next, &absinfo.fuzz);
125 0 : next = parse_token(next, &absinfo.flat);
126 0 : if (!next)
127 0 : return log_device_error(dev, "Failed to parse EV_ABS override '%s'", value);
128 :
129 0 : log_device_debug(dev, "keyboard: %x overridden with %"PRIi32"/%"PRIi32"/%"PRIi32"/%"PRIi32"/%"PRIi32,
130 : evcode, absinfo.minimum, absinfo.maximum, absinfo.resolution, absinfo.fuzz, absinfo.flat);
131 0 : r = ioctl(fd, EVIOCSABS(evcode), &absinfo);
132 0 : if (r < 0)
133 0 : return log_device_error_errno(dev, errno, "Failed to call EVIOCSABS");
134 :
135 0 : return 0;
136 : }
137 :
138 0 : static int set_trackpoint_sensitivity(sd_device *dev, const char *value) {
139 : sd_device *pdev;
140 : char val_s[DECIMAL_STR_MAX(int)];
141 : int r, val_i;
142 :
143 0 : assert(dev);
144 0 : assert(value);
145 :
146 : /* The sensitivity sysfs attr belongs to the serio parent device */
147 0 : r = sd_device_get_parent_with_subsystem_devtype(dev, "serio", NULL, &pdev);
148 0 : if (r < 0)
149 0 : return log_device_error_errno(dev, r, "Failed to get serio parent: %m");
150 :
151 0 : r = safe_atoi(value, &val_i);
152 0 : if (r < 0)
153 0 : return log_device_error_errno(dev, r, "Failed to parse POINTINGSTICK_SENSITIVITY '%s': %m", value);
154 0 : else if (val_i < 0 || val_i > 255)
155 0 : return log_device_error_errno(dev, SYNTHETIC_ERRNO(ERANGE), "POINTINGSTICK_SENSITIVITY %d outside range [0..255]", val_i);
156 :
157 0 : xsprintf(val_s, "%d", val_i);
158 :
159 0 : r = sd_device_set_sysattr_value(pdev, "sensitivity", val_s);
160 0 : if (r < 0)
161 0 : return log_device_error_errno(dev, r, "Failed to write 'sensitivity' attribute: %m");
162 :
163 0 : return 0;
164 : }
165 :
166 0 : static int builtin_keyboard(sd_device *dev, int argc, char *argv[], bool test) {
167 : unsigned release[1024];
168 0 : unsigned release_count = 0;
169 0 : _cleanup_close_ int fd = -1;
170 : const char *node, *key, *value;
171 0 : int has_abs = -1, r;
172 :
173 0 : r = sd_device_get_devname(dev, &node);
174 0 : if (r < 0)
175 0 : return log_device_error_errno(dev, r, "Failed to get device name: %m");
176 :
177 0 : FOREACH_DEVICE_PROPERTY(dev, key, value) {
178 : char *endptr;
179 :
180 0 : if (startswith(key, "KEYBOARD_KEY_")) {
181 0 : const char *keycode = value;
182 : unsigned scancode;
183 :
184 : /* KEYBOARD_KEY_<hex scan code>=<key identifier string> */
185 0 : scancode = strtoul(key + 13, &endptr, 16);
186 0 : if (endptr[0] != '\0') {
187 0 : log_device_warning(dev, "Failed to parse scan code from \"%s\", ignoring", key);
188 0 : continue;
189 : }
190 :
191 : /* a leading '!' needs a force-release entry */
192 0 : if (keycode[0] == '!') {
193 0 : keycode++;
194 :
195 0 : release[release_count] = scancode;
196 0 : if (release_count < ELEMENTSOF(release)-1)
197 0 : release_count++;
198 :
199 0 : if (keycode[0] == '\0')
200 0 : continue;
201 : }
202 :
203 0 : if (fd < 0) {
204 0 : fd = open(node, O_RDWR|O_CLOEXEC|O_NONBLOCK|O_NOCTTY);
205 0 : if (fd < 0)
206 0 : return log_device_error_errno(dev, errno, "Failed to open device '%s': %m", node);
207 : }
208 :
209 0 : (void) map_keycode(dev, fd, scancode, keycode);
210 0 : } else if (startswith(key, "EVDEV_ABS_")) {
211 : unsigned evcode;
212 :
213 : /* EVDEV_ABS_<EV_ABS code>=<min>:<max>:<res>:<fuzz>:<flat> */
214 0 : evcode = strtoul(key + 10, &endptr, 16);
215 0 : if (endptr[0] != '\0') {
216 0 : log_device_warning(dev, "Failed to parse EV_ABS code from \"%s\", ignoring", key);
217 0 : continue;
218 : }
219 :
220 0 : if (fd < 0) {
221 0 : fd = open(node, O_RDWR|O_CLOEXEC|O_NONBLOCK|O_NOCTTY);
222 0 : if (fd < 0)
223 0 : return log_device_error_errno(dev, errno, "Failed to open device '%s': %m", node);
224 : }
225 :
226 0 : if (has_abs == -1) {
227 : unsigned long bits;
228 : int rc;
229 :
230 0 : rc = ioctl(fd, EVIOCGBIT(0, sizeof(bits)), &bits);
231 0 : if (rc < 0)
232 0 : return log_device_error_errno(dev, errno, "Failed to set EVIOCGBIT");
233 :
234 0 : has_abs = !!(bits & (1 << EV_ABS));
235 0 : if (!has_abs)
236 0 : log_device_warning(dev, "EVDEV_ABS override set but no EV_ABS present on device");
237 : }
238 :
239 0 : if (!has_abs)
240 0 : continue;
241 :
242 0 : (void) override_abs(dev, fd, evcode, value);
243 0 : } else if (streq(key, "POINTINGSTICK_SENSITIVITY"))
244 0 : (void) set_trackpoint_sensitivity(dev, value);
245 : }
246 :
247 : /* install list of force-release codes */
248 0 : if (release_count > 0)
249 0 : (void) install_force_release(dev, release, release_count);
250 :
251 0 : return 0;
252 : }
253 :
254 : const UdevBuiltin udev_builtin_keyboard = {
255 : .name = "keyboard",
256 : .cmd = builtin_keyboard,
257 : .help = "Keyboard scan code to key mapping",
258 : };
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