/* SPDX-License-Identifier: LGPL-2.1+ */ #include #include #include #include #include #include #include #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, 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 inline 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, 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_= */ 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_=:::: */ 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", };