/* SPDX-License-Identifier: LGPL-2.1+ */ /*** This file is part of systemd. Copyright 2013 Kay Sievers ***/ #include #include #include #include #include #include "fd-util.h" #include "parse-util.h" #include "stdio-util.h" #include "string-util.h" #include "udev.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(struct udev_device *dev, const unsigned *release, unsigned release_count) { struct udev_device *atkbd; const char *cur; char codes[4096]; char *s; size_t l; unsigned i; int ret; assert(dev); assert(release); atkbd = udev_device_get_parent_with_subsystem_devtype(dev, "serio", NULL); if (!atkbd) return -ENODEV; cur = udev_device_get_sysattr_value(atkbd, "force_release"); if (!cur) return -ENODEV; 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_debug("keyboard: updating force-release list with '%s'", codes); ret = udev_device_set_sysattr_value(atkbd, "force_release", codes); if (ret < 0) log_error_errno(ret, "Error writing force-release attribute: %m"); return ret; } static void map_keycode(int fd, const char *devnode, 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') { log_error("Unknown key identifier '%s'", keycode); return; } } map.scan = scancode; map.key = keycode_num; log_debug("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) log_error_errno(errno, "Error calling EVIOCSKEYCODE on device node '%s' (scan code 0x%x, key code %d): %m", devnode, map.scan, map.key); } 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 void override_abs(int fd, const char *devnode, unsigned evcode, const char *value) { struct input_absinfo absinfo; int rc; char *next; rc = ioctl(fd, EVIOCGABS(evcode), &absinfo); if (rc < 0) { log_error_errno(errno, "Unable to EVIOCGABS device \"%s\"", devnode); return; } 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) { log_error("Unable to parse EV_ABS override '%s' for '%s'", value, devnode); return; } log_debug("keyboard: %x overridden with %"PRIi32"/%"PRIi32"/%"PRIi32"/%"PRIi32"/%"PRIi32" for \"%s\"", evcode, absinfo.minimum, absinfo.maximum, absinfo.resolution, absinfo.fuzz, absinfo.flat, devnode); rc = ioctl(fd, EVIOCSABS(evcode), &absinfo); if (rc < 0) log_error_errno(errno, "Unable to EVIOCSABS device \"%s\"", devnode); } static void set_trackpoint_sensitivity(struct udev_device *dev, const char *value) { struct udev_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 */ pdev = udev_device_get_parent_with_subsystem_devtype(dev, "serio", NULL); if (!pdev) { log_warning("Failed to get serio parent for '%s'", udev_device_get_devnode(dev)); return; } r = safe_atoi(value, &val_i); if (r < 0) { log_error("Unable to parse POINTINGSTICK_SENSITIVITY '%s' for '%s'", value, udev_device_get_devnode(dev)); return; } else if (val_i < 0 || val_i > 255) { log_error("POINTINGSTICK_SENSITIVITY %d outside range [0..255] for '%s' ", val_i, udev_device_get_devnode(dev)); return; } xsprintf(val_s, "%d", val_i); r = udev_device_set_sysattr_value(pdev, "sensitivity", val_s); if (r < 0) log_error_errno(r, "Failed to write 'sensitivity' attribute for '%s': %m", udev_device_get_devnode(pdev)); } static int open_device(const char *devnode) { int fd; fd = open(devnode, O_RDWR|O_CLOEXEC|O_NONBLOCK|O_NOCTTY); if (fd < 0) return log_error_errno(errno, "Error opening device \"%s\": %m", devnode); return fd; } static int builtin_keyboard(struct udev_device *dev, int argc, char *argv[], bool test) { struct udev_list_entry *entry; unsigned release[1024]; unsigned release_count = 0; _cleanup_close_ int fd = -1; const char *node; int has_abs = -1; node = udev_device_get_devnode(dev); if (!node) { log_error("No device node for \"%s\"", udev_device_get_syspath(dev)); return EXIT_FAILURE; } udev_list_entry_foreach(entry, udev_device_get_properties_list_entry(dev)) { const char *key; char *endptr; key = udev_list_entry_get_name(entry); if (startswith(key, "KEYBOARD_KEY_")) { const char *keycode; unsigned scancode; /* KEYBOARD_KEY_= */ scancode = strtoul(key + 13, &endptr, 16); if (endptr[0] != '\0') { log_warning("Unable to parse scan code from \"%s\"", key); continue; } keycode = udev_list_entry_get_value(entry); /* 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 == -1) { fd = open_device(node); if (fd < 0) return EXIT_FAILURE; } map_keycode(fd, node, scancode, keycode); } else if (startswith(key, "EVDEV_ABS_")) { unsigned evcode; /* EVDEV_ABS_=:::: */ evcode = strtoul(key + 10, &endptr, 16); if (endptr[0] != '\0') { log_warning("Unable to parse EV_ABS code from \"%s\"", key); continue; } if (fd == -1) { fd = open_device(node); if (fd < 0) return EXIT_FAILURE; } if (has_abs == -1) { unsigned long bits; int rc; rc = ioctl(fd, EVIOCGBIT(0, sizeof(bits)), &bits); if (rc < 0) { log_error_errno(errno, "Unable to EVIOCGBIT device \"%s\"", node); return EXIT_FAILURE; } has_abs = !!(bits & (1 << EV_ABS)); if (!has_abs) log_warning("EVDEV_ABS override set but no EV_ABS present on device \"%s\"", node); } if (!has_abs) continue; override_abs(fd, node, evcode, udev_list_entry_get_value(entry)); } else if (streq(key, "POINTINGSTICK_SENSITIVITY")) set_trackpoint_sensitivity(dev, udev_list_entry_get_value(entry)); } /* install list of force-release codes */ if (release_count > 0) install_force_release(dev, release, release_count); return EXIT_SUCCESS; } const struct udev_builtin udev_builtin_keyboard = { .name = "keyboard", .cmd = builtin_keyboard, .help = "Keyboard scan code to key mapping", };