/*
- * compose persistent device path
+ * expose input properties via udev
*
* Copyright (C) 2009 Martin Pitt <martin.pitt@ubuntu.com>
* Portions Copyright (C) 2004 David Zeuthen, <david@fubar.dk>
* Copyright (C) 2011 Kay Sievers <kay@vrfy.org>
+ * Copyright (C) 2014 Carlos Garnacho <carlosg@gnome.org>
+ * Copyright (C) 2014 David Herrmann <dh.herrmann@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
#include <linux/input.h>
#include "udev.h"
+#include "util.h"
/* we must use this kernel-compatible implementation */
#define BITS_PER_LONG (sizeof(unsigned long) * 8)
#define LONG(x) ((x)/BITS_PER_LONG)
#define test_bit(bit, array) ((array[LONG(bit)] >> OFF(bit)) & 1)
+static inline int abs_size_mm(const struct input_absinfo *absinfo) {
+ /* Resolution is defined to be in units/mm for ABS_X/Y */
+ return (absinfo->maximum - absinfo->minimum) / absinfo->resolution;
+}
+
+static void extract_info(struct udev_device *dev, const char *devpath, bool test) {
+ char width[DECIMAL_STR_MAX(int)], height[DECIMAL_STR_MAX(int)];
+ struct input_absinfo xabsinfo = {}, yabsinfo = {};
+ _cleanup_close_ int fd = -1;
+
+ fd = open(devpath, O_RDONLY|O_CLOEXEC);
+ if (fd < 0)
+ return;
+
+ if (ioctl(fd, EVIOCGABS(ABS_X), &xabsinfo) < 0 ||
+ ioctl(fd, EVIOCGABS(ABS_Y), &yabsinfo) < 0)
+ return;
+
+ if (xabsinfo.resolution <= 0 || yabsinfo.resolution <= 0)
+ return;
+
+ snprintf(width, sizeof(width), "%d", abs_size_mm(&xabsinfo));
+ snprintf(height, sizeof(height), "%d", abs_size_mm(&yabsinfo));
+
+ udev_builtin_add_property(dev, test, "ID_INPUT_WIDTH_MM", width);
+ udev_builtin_add_property(dev, test, "ID_INPUT_HEIGHT_MM", height);
+}
+
/*
* Read a capability attribute and return bitmask.
* @param dev udev_device
static void get_cap_mask(struct udev_device *dev,
struct udev_device *pdev, const char* attr,
unsigned long *bitmask, size_t bitmask_size,
- bool test)
-{
+ bool test) {
+ const char *v;
char text[4096];
unsigned i;
char* word;
unsigned long val;
- snprintf(text, sizeof(text), "%s", udev_device_get_sysattr_value(pdev, attr));
+ v = udev_device_get_sysattr_value(pdev, attr);
+ if (!v)
+ v = "";
+
+ snprintf(text, sizeof(text), "%s", v);
log_debug("%s raw kernel attribute: %s", attr, text);
memzero(bitmask, bitmask_size);
const unsigned long* bitmask_abs,
const unsigned long* bitmask_key,
const unsigned long* bitmask_rel,
- bool test)
-{
+ bool test) {
int is_mouse = 0;
int is_touchpad = 0;
udev_builtin_add_property(dev, test, "ID_INPUT_TABLET", "1");
else if (test_bit (BTN_TOOL_FINGER, bitmask_key) && !test_bit (BTN_TOOL_PEN, bitmask_key))
is_touchpad = 1;
- else if (test_bit (BTN_TRIGGER, bitmask_key) ||
- test_bit (BTN_A, bitmask_key) ||
- test_bit (BTN_1, bitmask_key))
- udev_builtin_add_property(dev, test, "ID_INPUT_JOYSTICK", "1");
else if (test_bit (BTN_MOUSE, bitmask_key))
/* This path is taken by VMware's USB mouse, which has
* absolute axes, but no touch/pressure button. */
is_mouse = 1;
else if (test_bit (BTN_TOUCH, bitmask_key))
udev_builtin_add_property(dev, test, "ID_INPUT_TOUCHSCREEN", "1");
+ /* joysticks don't necessarily have to have buttons; e. g.
+ * rudders/pedals are joystick-like, but buttonless; they have
+ * other fancy axes */
+ else if (test_bit (BTN_TRIGGER, bitmask_key) ||
+ test_bit (BTN_A, bitmask_key) ||
+ test_bit (BTN_1, bitmask_key) ||
+ test_bit (ABS_RX, bitmask_abs) ||
+ test_bit (ABS_RY, bitmask_abs) ||
+ test_bit (ABS_RZ, bitmask_abs) ||
+ test_bit (ABS_THROTTLE, bitmask_abs) ||
+ test_bit (ABS_RUDDER, bitmask_abs) ||
+ test_bit (ABS_WHEEL, bitmask_abs) ||
+ test_bit (ABS_GAS, bitmask_abs) ||
+ test_bit (ABS_BRAKE, bitmask_abs))
+ udev_builtin_add_property(dev, test, "ID_INPUT_JOYSTICK", "1");
}
if (test_bit (EV_REL, bitmask_ev) &&
static void test_key (struct udev_device *dev,
const unsigned long* bitmask_ev,
const unsigned long* bitmask_key,
- bool test)
-{
+ bool test) {
unsigned i;
unsigned long found;
unsigned long mask;
udev_builtin_add_property(dev, test, "ID_INPUT_KEYBOARD", "1");
}
-static int builtin_input_id(struct udev_device *dev, int argc, char *argv[], bool test)
-{
+static int builtin_input_id(struct udev_device *dev, int argc, char *argv[], bool test) {
struct udev_device *pdev;
unsigned long bitmask_ev[NBITS(EV_MAX)];
unsigned long bitmask_abs[NBITS(ABS_MAX)];
unsigned long bitmask_key[NBITS(KEY_MAX)];
unsigned long bitmask_rel[NBITS(REL_MAX)];
+ const char *sysname, *devnode;
/* walk up the parental chain until we find the real input device; the
* argument is very likely a subdevice of this, like eventN */
while (pdev != NULL && udev_device_get_sysattr_value(pdev, "capabilities/ev") == NULL)
pdev = udev_device_get_parent_with_subsystem_devtype(pdev, "input", NULL);
- /* not an "input" class device */
- if (pdev == NULL)
- return EXIT_SUCCESS;
-
- /* Use this as a flag that input devices were detected, so that this
- * program doesn't need to be called more than once per device */
- udev_builtin_add_property(dev, test, "ID_INPUT", "1");
- get_cap_mask(dev, pdev, "capabilities/ev", bitmask_ev, sizeof(bitmask_ev), test);
- get_cap_mask(dev, pdev, "capabilities/abs", bitmask_abs, sizeof(bitmask_abs), test);
- get_cap_mask(dev, pdev, "capabilities/rel", bitmask_rel, sizeof(bitmask_rel), test);
- get_cap_mask(dev, pdev, "capabilities/key", bitmask_key, sizeof(bitmask_key), test);
- test_pointers(dev, bitmask_ev, bitmask_abs, bitmask_key, bitmask_rel, test);
- test_key(dev, bitmask_ev, bitmask_key, test);
+ if (pdev) {
+ /* Use this as a flag that input devices were detected, so that this
+ * program doesn't need to be called more than once per device */
+ udev_builtin_add_property(dev, test, "ID_INPUT", "1");
+ get_cap_mask(dev, pdev, "capabilities/ev", bitmask_ev, sizeof(bitmask_ev), test);
+ get_cap_mask(dev, pdev, "capabilities/abs", bitmask_abs, sizeof(bitmask_abs), test);
+ get_cap_mask(dev, pdev, "capabilities/rel", bitmask_rel, sizeof(bitmask_rel), test);
+ get_cap_mask(dev, pdev, "capabilities/key", bitmask_key, sizeof(bitmask_key), test);
+ test_pointers(dev, bitmask_ev, bitmask_abs, bitmask_key, bitmask_rel, test);
+ test_key(dev, bitmask_ev, bitmask_key, test);
+ }
+
+ devnode = udev_device_get_devnode(dev);
+ sysname = udev_device_get_sysname(dev);
+ if (devnode && sysname && startswith(sysname, "event"))
+ extract_info(dev, devnode, test);
+
return EXIT_SUCCESS;
}
const struct udev_builtin udev_builtin_input_id = {
.name = "input_id",
.cmd = builtin_input_id,
- .help = "input device properties",
+ .help = "Input device properties",
};
~ianmdlvl / elogind.git / blobdiff