| /*** |
| This file is part of systemd. |
| |
| Copyright 2013 Kay Sievers <kay@vrfy.org> |
| |
| systemd is free software; you can redistribute it and/or modify it |
| under the terms of the GNU Lesser General Public License as published by |
| the Free Software Foundation; either version 2.1 of the License, or |
| (at your option) any later version. |
| |
| systemd is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with systemd; If not, see <http://www.gnu.org/licenses/>. |
| ***/ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/ioctl.h> |
| #include <linux/input.h> |
| |
| #include "fd-util.h" |
| #include "parse-util.h" |
| #include "stdio-util.h" |
| #include "string-util.h" |
| #include "udev.h" |
| |
| static const struct key *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 *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; |
| } |
| |
| 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; |
| |
| 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_<hex scan code>=<key identifier string> */ |
| 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_<EV_ABS code>=<min>:<max>:<res>:<fuzz>:<flat> */ |
| 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; |
| } |
| |
| 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", |
| }; |