mirror of
https://github.com/systemd/systemd.git
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275 lines
9.2 KiB
C
275 lines
9.2 KiB
C
/***
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This file is part of systemd.
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Copyright 2013 Kay Sievers <kay@vrfy.org>
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <stdio.h>
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#include <string.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 "udev.h"
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static const struct key *keyboard_lookup_key(const char *str, unsigned len);
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#include "keyboard-keys-from-name.h"
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static int install_force_release(struct udev_device *dev, const unsigned *release, unsigned release_count) {
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struct udev_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 ret;
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assert(dev);
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assert(release);
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atkbd = udev_device_get_parent_with_subsystem_devtype(dev, "serio", NULL);
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if (!atkbd)
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return -ENODEV;
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cur = udev_device_get_sysattr_value(atkbd, "force_release");
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if (!cur)
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return -ENODEV;
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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_debug("keyboard: updating force-release list with '%s'", codes);
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ret = udev_device_set_sysattr_value(atkbd, "force_release", codes);
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if (ret < 0)
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log_error_errno(ret, "Error writing force-release attribute: %m");
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return ret;
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}
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static void map_keycode(int fd, const char *devnode, int scancode, const char *keycode)
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{
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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 *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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log_error("Unknown key identifier '%s'", keycode);
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return;
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}
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}
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map.scan = scancode;
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map.key = keycode_num;
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log_debug("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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log_error_errno(errno, "Error calling EVIOCSKEYCODE on device node '%s' (scan code 0x%x, key code %d): %m", devnode, map.scan, map.key);
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}
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static inline 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 void override_abs(int fd, const char *devnode,
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unsigned evcode, const char *value) {
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struct input_absinfo absinfo;
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int rc;
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char *next;
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rc = ioctl(fd, EVIOCGABS(evcode), &absinfo);
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if (rc < 0) {
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log_error_errno(errno, "Unable to EVIOCGABS device \"%s\"", devnode);
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return;
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}
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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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log_error("Unable to parse EV_ABS override '%s' for '%s'", value, devnode);
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return;
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}
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log_debug("keyboard: %x overridden with %"PRIi32"/%"PRIi32"/%"PRIi32"/%"PRIi32"/%"PRIi32" for \"%s\"",
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evcode,
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absinfo.minimum, absinfo.maximum, absinfo.resolution, absinfo.fuzz, absinfo.flat,
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devnode);
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rc = ioctl(fd, EVIOCSABS(evcode), &absinfo);
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if (rc < 0)
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log_error_errno(errno, "Unable to EVIOCSABS device \"%s\"", devnode);
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}
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static void set_trackpoint_sensitivity(struct udev_device *dev, const char *value)
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{
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struct udev_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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pdev = udev_device_get_parent_with_subsystem_devtype(dev, "serio", NULL);
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if (!pdev) {
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log_warning("Failed to get serio parent for '%s'", udev_device_get_devnode(dev));
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return;
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}
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r = safe_atoi(value, &val_i);
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if (r < 0) {
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log_error("Unable to parse POINTINGSTICK_SENSITIVITY '%s' for '%s'", value, udev_device_get_devnode(dev));
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return;
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}
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xsprintf(val_s, "%d", val_i);
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r = udev_device_set_sysattr_value(pdev, "sensitivity", val_s);
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if (r < 0)
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log_error_errno(r, "Failed to write 'sensitivity' attribute for '%s': %m", udev_device_get_devnode(pdev));
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}
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static int open_device(const char *devnode) {
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int fd;
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fd = open(devnode, O_RDWR|O_CLOEXEC|O_NONBLOCK|O_NOCTTY);
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if (fd < 0)
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return log_error_errno(errno, "Error opening device \"%s\": %m", devnode);
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return fd;
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}
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static int builtin_keyboard(struct udev_device *dev, int argc, char *argv[], bool test) {
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struct udev_list_entry *entry;
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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;
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node = udev_device_get_devnode(dev);
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if (!node) {
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log_error("No device node for \"%s\"", udev_device_get_syspath(dev));
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return EXIT_FAILURE;
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}
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udev_list_entry_foreach(entry, udev_device_get_properties_list_entry(dev)) {
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const char *key;
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char *endptr;
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key = udev_list_entry_get_name(entry);
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if (startswith(key, "KEYBOARD_KEY_")) {
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const char *keycode;
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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_warning("Unable to parse scan code from \"%s\"", key);
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continue;
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}
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keycode = udev_list_entry_get_value(entry);
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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 == -1) {
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fd = open_device(node);
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if (fd < 0)
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return EXIT_FAILURE;
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}
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map_keycode(fd, node, 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_warning("Unable to parse EV_ABS code from \"%s\"", key);
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continue;
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}
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if (fd == -1) {
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fd = open_device(node);
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if (fd < 0)
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return EXIT_FAILURE;
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}
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override_abs(fd, node, evcode, udev_list_entry_get_value(entry));
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} else if (streq(key, "POINTINGSTICK_SENSITIVITY")) {
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set_trackpoint_sensitivity(dev, udev_list_entry_get_value(entry));
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}
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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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install_force_release(dev, release, release_count);
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return EXIT_SUCCESS;
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}
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const struct udev_builtin 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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