255 lines
9.3 KiB
C
255 lines
9.3 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#include <errno.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <sys/ioctl.h>
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#include <linux/input.h>
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#include "device-util.h"
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#include "fd-util.h"
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#include "parse-util.h"
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#include "stdio-util.h"
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#include "string-util.h"
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#include "strxcpyx.h"
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#include "udev-builtin.h"
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static const struct key_name *keyboard_lookup_key(const char *str, GPERF_LEN_TYPE len);
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#include "keyboard-keys-from-name.h"
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static int install_force_release(sd_device *dev, const unsigned *release, unsigned release_count) {
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sd_device *atkbd;
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const char *cur;
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char codes[4096];
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char *s;
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size_t l;
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unsigned i;
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int r;
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assert(dev);
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assert(release);
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r = sd_device_get_parent_with_subsystem_devtype(dev, "serio", NULL, &atkbd);
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if (r < 0)
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return log_device_error_errno(dev, r, "Failed to get serio parent: %m");
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r = sd_device_get_sysattr_value(atkbd, "force_release", &cur);
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if (r < 0)
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return log_device_error_errno(atkbd, r, "Failed to get force-release attribute: %m");
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s = codes;
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l = sizeof(codes);
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/* copy current content */
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l = strpcpy(&s, l, cur);
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/* append new codes */
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for (i = 0; i < release_count; i++)
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l = strpcpyf(&s, l, ",%u", release[i]);
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log_device_debug(atkbd, "keyboard: updating force-release list with '%s'", codes);
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r = sd_device_set_sysattr_value(atkbd, "force_release", codes);
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if (r < 0)
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return log_device_error_errno(atkbd, r, "Failed to set force-release attribute: %m");
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return 0;
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}
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static int map_keycode(sd_device *dev, int fd, int scancode, const char *keycode) {
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struct {
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unsigned scan;
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unsigned key;
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} map;
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char *endptr;
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const struct key_name *k;
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unsigned keycode_num;
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/* translate identifier to key code */
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k = keyboard_lookup_key(keycode, strlen(keycode));
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if (k) {
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keycode_num = k->id;
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} else {
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/* check if it's a numeric code already */
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keycode_num = strtoul(keycode, &endptr, 0);
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if (endptr[0] !='\0')
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return log_device_error_errno(dev, SYNTHETIC_ERRNO(EINVAL), "Failed to parse key identifier '%s'", keycode);
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}
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map.scan = scancode;
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map.key = keycode_num;
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log_device_debug(dev, "keyboard: mapping scan code %d (0x%x) to key code %d (0x%x)",
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map.scan, map.scan, map.key, map.key);
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if (ioctl(fd, EVIOCSKEYCODE, &map) < 0)
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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);
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return 0;
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}
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static const char* parse_token(const char *current, int32_t *val_out) {
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char *next;
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int32_t val;
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if (!current)
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return NULL;
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val = strtol(current, &next, 0);
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if (*next && *next != ':')
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return NULL;
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if (next != current)
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*val_out = val;
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if (*next)
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next++;
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return next;
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}
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static int override_abs(sd_device *dev, int fd, unsigned evcode, const char *value) {
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struct input_absinfo absinfo;
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const char *next;
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if (ioctl(fd, EVIOCGABS(evcode), &absinfo) < 0)
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return log_device_error_errno(dev, errno, "Failed to call EVIOCGABS");
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next = parse_token(value, &absinfo.minimum);
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next = parse_token(next, &absinfo.maximum);
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next = parse_token(next, &absinfo.resolution);
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next = parse_token(next, &absinfo.fuzz);
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next = parse_token(next, &absinfo.flat);
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if (!next)
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return log_device_error_errno(dev, SYNTHETIC_ERRNO(EINVAL),
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"Failed to parse EV_ABS override '%s'", value);
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log_device_debug(dev, "keyboard: %x overridden with %"PRIi32"/%"PRIi32"/%"PRIi32"/%"PRIi32"/%"PRIi32,
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evcode, absinfo.minimum, absinfo.maximum, absinfo.resolution, absinfo.fuzz, absinfo.flat);
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if (ioctl(fd, EVIOCSABS(evcode), &absinfo) < 0)
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return log_device_error_errno(dev, errno, "Failed to call EVIOCSABS");
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return 0;
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}
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static int set_trackpoint_sensitivity(sd_device *dev, const char *value) {
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sd_device *pdev;
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char val_s[DECIMAL_STR_MAX(int)];
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int r, val_i;
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assert(dev);
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assert(value);
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/* The sensitivity sysfs attr belongs to the serio parent device */
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r = sd_device_get_parent_with_subsystem_devtype(dev, "serio", NULL, &pdev);
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if (r < 0)
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return log_device_error_errno(dev, r, "Failed to get serio parent: %m");
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r = safe_atoi(value, &val_i);
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if (r < 0)
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return log_device_error_errno(dev, r, "Failed to parse POINTINGSTICK_SENSITIVITY '%s': %m", value);
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else if (val_i < 0 || val_i > 255)
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return log_device_error_errno(dev, SYNTHETIC_ERRNO(ERANGE), "POINTINGSTICK_SENSITIVITY %d outside range [0..255]", val_i);
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xsprintf(val_s, "%d", val_i);
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r = sd_device_set_sysattr_value(pdev, "sensitivity", val_s);
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if (r < 0)
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return log_device_error_errno(dev, r, "Failed to write 'sensitivity' attribute: %m");
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return 0;
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}
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static int builtin_keyboard(sd_device *dev, int argc, char *argv[], bool test) {
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unsigned release[1024];
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unsigned release_count = 0;
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_cleanup_close_ int fd = -1;
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const char *node, *key, *value;
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int has_abs = -1, r;
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r = sd_device_get_devname(dev, &node);
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if (r < 0)
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return log_device_error_errno(dev, r, "Failed to get device name: %m");
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FOREACH_DEVICE_PROPERTY(dev, key, value) {
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char *endptr;
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if (startswith(key, "KEYBOARD_KEY_")) {
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const char *keycode = value;
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unsigned scancode;
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/* KEYBOARD_KEY_<hex scan code>=<key identifier string> */
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scancode = strtoul(key + 13, &endptr, 16);
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if (endptr[0] != '\0') {
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log_device_warning(dev, "Failed to parse scan code from \"%s\", ignoring", key);
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continue;
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}
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/* a leading '!' needs a force-release entry */
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if (keycode[0] == '!') {
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keycode++;
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release[release_count] = scancode;
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if (release_count < ELEMENTSOF(release)-1)
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release_count++;
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if (keycode[0] == '\0')
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continue;
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}
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if (fd < 0) {
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fd = open(node, O_RDWR|O_CLOEXEC|O_NONBLOCK|O_NOCTTY);
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if (fd < 0)
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return log_device_error_errno(dev, errno, "Failed to open device '%s': %m", node);
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}
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(void) map_keycode(dev, fd, scancode, keycode);
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} else if (startswith(key, "EVDEV_ABS_")) {
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unsigned evcode;
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/* EVDEV_ABS_<EV_ABS code>=<min>:<max>:<res>:<fuzz>:<flat> */
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evcode = strtoul(key + 10, &endptr, 16);
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if (endptr[0] != '\0') {
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log_device_warning(dev, "Failed to parse EV_ABS code from \"%s\", ignoring", key);
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continue;
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}
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if (fd < 0) {
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fd = open(node, O_RDWR|O_CLOEXEC|O_NONBLOCK|O_NOCTTY);
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if (fd < 0)
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return log_device_error_errno(dev, errno, "Failed to open device '%s': %m", node);
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}
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if (has_abs == -1) {
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unsigned long bits;
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int rc;
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rc = ioctl(fd, EVIOCGBIT(0, sizeof(bits)), &bits);
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if (rc < 0)
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return log_device_error_errno(dev, errno, "Failed to set EVIOCGBIT");
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has_abs = !!(bits & (1 << EV_ABS));
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if (!has_abs)
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log_device_warning(dev, "EVDEV_ABS override set but no EV_ABS present on device");
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}
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if (!has_abs)
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continue;
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(void) override_abs(dev, fd, evcode, value);
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} else if (streq(key, "POINTINGSTICK_SENSITIVITY"))
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(void) set_trackpoint_sensitivity(dev, value);
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}
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/* install list of force-release codes */
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if (release_count > 0)
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(void) install_force_release(dev, release, release_count);
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return 0;
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}
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const UdevBuiltin udev_builtin_keyboard = {
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.name = "keyboard",
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.cmd = builtin_keyboard,
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.help = "Keyboard scan code to key mapping",
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};
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