diff options
Diffstat (limited to 'src/udev/udev-builtin-keyboard.c')
| -rw-r--r-- | src/udev/udev-builtin-keyboard.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/src/udev/udev-builtin-keyboard.c b/src/udev/udev-builtin-keyboard.c new file mode 100644 index 0000000000..ddd853594e --- /dev/null +++ b/src/udev/udev-builtin-keyboard.c @@ -0,0 +1,163 @@ +/*** + 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 <errno.h> +#include <string.h> +#include <stdlib.h> +#include <fcntl.h> +#include <sys/ioctl.h> +#include <linux/limits.h> +#include <linux/input.h> + +#include "udev.h" + +static const struct key *keyboard_lookup_key(const char *str, unsigned int len); +#include "keyboard-keys-from-name.h" +#include "keyboard-keys-to-name.h" + +static int install_force_release(struct udev_device *dev, const unsigned int *release, unsigned int release_count) { + struct udev_device *atkbd; + const char *cur; + char codes[4096]; + char *s; + size_t l; + unsigned int i; + int ret; + + 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, ",%d", release[i]); + + log_debug("keyboard: updating force-release list with '%s'\n", codes); + ret = udev_device_set_sysattr_value(atkbd, "force_release", codes); + if (ret < 0) + log_error("Error writing force-release attribute: %s", strerror(-ret)); + return ret; +} + +static int builtin_keyboard(struct udev_device *dev, int argc, char *argv[], bool test) { + struct udev_list_entry *entry; + struct { + unsigned int scan; + unsigned int key; + } map[1024]; + unsigned int map_count = 0; + unsigned int release[1024]; + unsigned int release_count = 0; + + udev_list_entry_foreach(entry, udev_device_get_properties_list_entry(dev)) { + const char *key; + unsigned int scancode; + char *endptr; + const char *keycode; + const struct key *k; + + key = udev_list_entry_get_name(entry); + if (!startswith(key, "KEYBOARD_KEY_")) + continue; + + /* KEYBOARD_KEY_<hex scan code>=<key identifier string> */ + scancode = strtol(key + 13, &endptr, 16); + if (endptr[0] != '\0') { + log_error("Error, unable to parse scan code from '%s'\n", 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; + } + + /* translate identifier to key code */ + k = keyboard_lookup_key(keycode, strlen(keycode)); + if (!k) { + log_error("Error, unknown key identifier '%s'\n", keycode); + continue; + } + + map[map_count].scan = scancode; + map[map_count].key = k->id; + if (map_count < ELEMENTSOF(map)-1) + map_count++; + } + + if (map_count > 0 || release_count > 0) { + const char *node; + int fd; + unsigned int i; + + node = udev_device_get_devnode(dev); + if (!node) { + log_error("Error, no device node for '%s'\n", udev_device_get_syspath(dev)); + return EXIT_FAILURE; + } + + fd = open(udev_device_get_devnode(dev), O_RDWR|O_CLOEXEC|O_NONBLOCK|O_NOCTTY); + if (fd < 0) { + log_error("Error, opening device '%s': %m\n", node); + return EXIT_FAILURE; + } + + /* install list of map codes */ + for (i = 0; i < map_count; i++) { + log_debug("keyboard: mapping scan code %d (0x%x) to key code %d (0x%x)\n", + map[i].scan, map[i].scan, map[i].key, map[i].key); + if (ioctl(fd, EVIOCSKEYCODE, &map[i]) < 0) + log_error("Error calling EVIOCSKEYCODE: %m\n"); + } + + /* install list of force-release codes */ + if (release_count > 0) + install_force_release(dev, release, release_count); + + close(fd); + } + + return EXIT_SUCCESS; +} + +const struct udev_builtin udev_builtin_keyboard = { + .name = "keyboard", + .cmd = builtin_keyboard, + .help = "keyboard scan code to key mapping", +}; |