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