1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 Copyright © 2013 Kay Sievers <kay@vrfy.org>
10 #include <linux/input.h>
13 #include "parse-util.h"
14 #include "stdio-util.h"
15 #include "string-util.h"
18 static const struct key_name
*keyboard_lookup_key(const char *str
, GPERF_LEN_TYPE len
);
19 #include "keyboard-keys-from-name.h"
21 static int install_force_release(struct udev_device
*dev
, const unsigned *release
, unsigned release_count
) {
22 struct udev_device
*atkbd
;
33 atkbd
= udev_device_get_parent_with_subsystem_devtype(dev
, "serio", NULL
);
37 cur
= udev_device_get_sysattr_value(atkbd
, "force_release");
44 /* copy current content */
45 l
= strpcpy(&s
, l
, cur
);
47 /* append new codes */
48 for (i
= 0; i
< release_count
; i
++)
49 l
= strpcpyf(&s
, l
, ",%u", release
[i
]);
51 log_debug("keyboard: updating force-release list with '%s'", codes
);
52 ret
= udev_device_set_sysattr_value(atkbd
, "force_release", codes
);
54 log_error_errno(ret
, "Error writing force-release attribute: %m");
58 static void map_keycode(int fd
, const char *devnode
, int scancode
, const char *keycode
)
65 const struct key_name
*k
;
68 /* translate identifier to key code */
69 k
= keyboard_lookup_key(keycode
, strlen(keycode
));
73 /* check if it's a numeric code already */
74 keycode_num
= strtoul(keycode
, &endptr
, 0);
75 if (endptr
[0] !='\0') {
76 log_error("Unknown key identifier '%s'", keycode
);
82 map
.key
= keycode_num
;
84 log_debug("keyboard: mapping scan code %d (0x%x) to key code %d (0x%x)",
85 map
.scan
, map
.scan
, map
.key
, map
.key
);
87 if (ioctl(fd
, EVIOCSKEYCODE
, &map
) < 0)
88 log_error_errno(errno
, "Error calling EVIOCSKEYCODE on device node '%s' (scan code 0x%x, key code %d): %m", devnode
, map
.scan
, map
.key
);
91 static inline char* parse_token(const char *current
, int32_t *val_out
) {
98 val
= strtol(current
, &next
, 0);
99 if (*next
&& *next
!= ':')
111 static void override_abs(int fd
, const char *devnode
,
112 unsigned evcode
, const char *value
) {
113 struct input_absinfo absinfo
;
117 rc
= ioctl(fd
, EVIOCGABS(evcode
), &absinfo
);
119 log_error_errno(errno
, "Unable to EVIOCGABS device \"%s\"", devnode
);
123 next
= parse_token(value
, &absinfo
.minimum
);
124 next
= parse_token(next
, &absinfo
.maximum
);
125 next
= parse_token(next
, &absinfo
.resolution
);
126 next
= parse_token(next
, &absinfo
.fuzz
);
127 next
= parse_token(next
, &absinfo
.flat
);
129 log_error("Unable to parse EV_ABS override '%s' for '%s'", value
, devnode
);
133 log_debug("keyboard: %x overridden with %"PRIi32
"/%"PRIi32
"/%"PRIi32
"/%"PRIi32
"/%"PRIi32
" for \"%s\"",
135 absinfo
.minimum
, absinfo
.maximum
, absinfo
.resolution
, absinfo
.fuzz
, absinfo
.flat
,
137 rc
= ioctl(fd
, EVIOCSABS(evcode
), &absinfo
);
139 log_error_errno(errno
, "Unable to EVIOCSABS device \"%s\"", devnode
);
142 static void set_trackpoint_sensitivity(struct udev_device
*dev
, const char *value
)
144 struct udev_device
*pdev
;
145 char val_s
[DECIMAL_STR_MAX(int)];
151 /* The sensitivity sysfs attr belongs to the serio parent device */
152 pdev
= udev_device_get_parent_with_subsystem_devtype(dev
, "serio", NULL
);
154 log_warning("Failed to get serio parent for '%s'", udev_device_get_devnode(dev
));
158 r
= safe_atoi(value
, &val_i
);
160 log_error("Unable to parse POINTINGSTICK_SENSITIVITY '%s' for '%s'", value
, udev_device_get_devnode(dev
));
162 } else if (val_i
< 0 || val_i
> 255) {
163 log_error("POINTINGSTICK_SENSITIVITY %d outside range [0..255] for '%s' ", val_i
, udev_device_get_devnode(dev
));
167 xsprintf(val_s
, "%d", val_i
);
169 r
= udev_device_set_sysattr_value(pdev
, "sensitivity", val_s
);
171 log_error_errno(r
, "Failed to write 'sensitivity' attribute for '%s': %m", udev_device_get_devnode(pdev
));
174 static int open_device(const char *devnode
) {
177 fd
= open(devnode
, O_RDWR
|O_CLOEXEC
|O_NONBLOCK
|O_NOCTTY
);
179 return log_error_errno(errno
, "Error opening device \"%s\": %m", devnode
);
184 static int builtin_keyboard(struct udev_device
*dev
, int argc
, char *argv
[], bool test
) {
185 struct udev_list_entry
*entry
;
186 unsigned release
[1024];
187 unsigned release_count
= 0;
188 _cleanup_close_
int fd
= -1;
192 node
= udev_device_get_devnode(dev
);
194 log_error("No device node for \"%s\"", udev_device_get_syspath(dev
));
198 udev_list_entry_foreach(entry
, udev_device_get_properties_list_entry(dev
)) {
202 key
= udev_list_entry_get_name(entry
);
203 if (startswith(key
, "KEYBOARD_KEY_")) {
207 /* KEYBOARD_KEY_<hex scan code>=<key identifier string> */
208 scancode
= strtoul(key
+ 13, &endptr
, 16);
209 if (endptr
[0] != '\0') {
210 log_warning("Unable to parse scan code from \"%s\"", key
);
214 keycode
= udev_list_entry_get_value(entry
);
216 /* a leading '!' needs a force-release entry */
217 if (keycode
[0] == '!') {
220 release
[release_count
] = scancode
;
221 if (release_count
< ELEMENTSOF(release
)-1)
224 if (keycode
[0] == '\0')
229 fd
= open_device(node
);
234 map_keycode(fd
, node
, scancode
, keycode
);
235 } else if (startswith(key
, "EVDEV_ABS_")) {
238 /* EVDEV_ABS_<EV_ABS code>=<min>:<max>:<res>:<fuzz>:<flat> */
239 evcode
= strtoul(key
+ 10, &endptr
, 16);
240 if (endptr
[0] != '\0') {
241 log_warning("Unable to parse EV_ABS code from \"%s\"", key
);
246 fd
= open_device(node
);
255 rc
= ioctl(fd
, EVIOCGBIT(0, sizeof(bits
)), &bits
);
257 log_error_errno(errno
, "Unable to EVIOCGBIT device \"%s\"", node
);
261 has_abs
= !!(bits
& (1 << EV_ABS
));
263 log_warning("EVDEV_ABS override set but no EV_ABS present on device \"%s\"", node
);
269 override_abs(fd
, node
, evcode
, udev_list_entry_get_value(entry
));
270 } else if (streq(key
, "POINTINGSTICK_SENSITIVITY"))
271 set_trackpoint_sensitivity(dev
, udev_list_entry_get_value(entry
));
274 /* install list of force-release codes */
275 if (release_count
> 0)
276 install_force_release(dev
, release
, release_count
);
281 const struct udev_builtin udev_builtin_keyboard
= {
283 .cmd
= builtin_keyboard
,
284 .help
= "Keyboard scan code to key mapping",