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Diffstat (limited to 'src/grp-udev/libudev-core/udev-builtin-keyboard.c')
-rw-r--r--src/grp-udev/libudev-core/udev-builtin-keyboard.c278
1 files changed, 278 insertions, 0 deletions
diff --git a/src/grp-udev/libudev-core/udev-builtin-keyboard.c b/src/grp-udev/libudev-core/udev-builtin-keyboard.c
new file mode 100644
index 0000000000..22faeb488b
--- /dev/null
+++ b/src/grp-udev/libudev-core/udev-builtin-keyboard.c
@@ -0,0 +1,278 @@
+/***
+ 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 "systemd-basic/fd-util.h"
+#include "systemd-basic/parse-util.h"
+#include "systemd-basic/stdio-util.h"
+#include "systemd-basic/string-util.h"
+#include "udev.h"
+
+static const struct key *keyboard_lookup_key(const char *str, unsigned 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",
+};