-/*
- * input_id - input device classification
- *
- * Copyright (C) 2009 Martin Pitt <martin.pitt@ubuntu.com>
- * Portions Copyright (C) 2004 David Zeuthen, <david@fubar.dk>
- *
- * 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
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program 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
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with keymap; if not, write to the Free Software Foundation,
- * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
- */
-
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <limits.h>
-#include <linux/input.h>
-
-#include "libudev.h"
-
-/* we must use this kernel-compatible implementation */
-#define BITS_PER_LONG (sizeof(unsigned long) * 8)
-#define NBITS(x) ((((x)-1)/BITS_PER_LONG)+1)
-#define OFF(x) ((x)%BITS_PER_LONG)
-#define BIT(x) (1UL<<OFF(x))
-#define LONG(x) ((x)/BITS_PER_LONG)
-#define test_bit(bit, array) ((array[LONG(bit)] >> OFF(bit)) & 1)
-
-/*
- * Read a capability attribute and return bitmask.
- * @param dev udev_device
- * @param attr sysfs attribute name (e. g. "capabilities/key")
- * @param bitmask: Output array; must have max_size elements
- */
-static void get_cap_mask (struct udev_device *dev, const char* attr,
- unsigned long *bitmask, size_t max_size)
-{
- char text[4096];
- int i;
- char* word;
- unsigned long val;
-
- snprintf(text, sizeof(text), "%s", udev_device_get_sysattr_value(dev, attr));
-
- memset (bitmask, 0, max_size);
- i = 0;
- while ((word = strrchr(text, ' ')) != NULL) {
- val = strtoul (word+1, NULL, 16);
- bitmask[i] = val;
- *word = '\0';
- ++i;
- }
- val = strtoul (text, NULL, 16);
- bitmask[i] = val;
-}
-
-/* pointer devices */
-static void test_pointers (const unsigned long* bitmask_abs, const unsigned long* bitmask_key, const unsigned long* bitmask_rel)
-{
- int is_mouse = 0;
- int is_touchpad = 0;
-
- if (test_bit (ABS_X, bitmask_abs) && test_bit (ABS_Y, bitmask_abs)) {
- if (test_bit (BTN_STYLUS, bitmask_key) || test_bit (BTN_TOOL_PEN, bitmask_key))
- puts("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))
- puts("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;
- }
-
- if (test_bit (REL_X, bitmask_rel) && test_bit (REL_Y, bitmask_rel))
- is_mouse = 1;
-
- if (is_mouse)
- puts("ID_INPUT_MOUSE=1");
- if (is_touchpad)
- puts("ID_INPUT_TOUCHPAD=1");
-}
-
-/* key like devices */
-static void test_key (const unsigned long* bitmask_key)
-{
- unsigned i;
- unsigned long acc;
- unsigned long mask;
-
- /* do we have any KEY_* capability? */
- acc = 0;
- for (i = 0; i < BTN_MISC/BITS_PER_LONG; ++i)
- acc |= bitmask_key[i];
- if (acc > 0)
- puts("ID_INPUT_KEY=1");
-
- /* the first 32 bits are ESC, numbers, and Q to D; if we have all of
- * those, consider it a full keyboard; do not test KEY_RESERVED, though */
- mask = 0xFFFFFFFE;
- if ((bitmask_key[0] & mask) == mask)
- puts("ID_INPUT_KEYBOARD=1");
-}
-
-int main (int argc, char** argv)
-{
- struct udev *udev;
- struct udev_device *dev;
-
- char devpath[PATH_MAX];
- unsigned long bitmask_abs[NBITS(ABS_MAX)];
- unsigned long bitmask_key[NBITS(KEY_MAX)];
- unsigned long bitmask_rel[NBITS(REL_MAX)];
-
- if (argc != 2) {
- fprintf(stderr, "Usage: %s <device path (without /sys)>\n", argv[0]);
- exit(1);
- }
-
- /* get the device */
- udev = udev_new();
- if (udev == NULL)
- return 1;
-
- snprintf(devpath, sizeof(devpath), "%s/%s", udev_get_sys_path(udev), argv[1]);
- dev = udev_device_new_from_syspath(udev, devpath);
- if (dev == NULL) {
- fprintf(stderr, "unable to access '%s'\n", devpath);
- return 1;
- }
-
- /* walk up the parental chain until we find the real input device; the
- * argument is very likely a subdevice of this, like eventN */
- while (dev != NULL && udev_device_get_sysattr_value(dev, "capabilities/key") == NULL)
- dev = udev_device_get_parent(dev);
-
- /* not an "input" class device */
- if (dev == NULL)
- return 0;
-
- /* 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 */
- puts("ID_INPUT=1");
-
- get_cap_mask (dev, "capabilities/abs", bitmask_abs, sizeof (bitmask_abs));
- get_cap_mask (dev, "capabilities/rel", bitmask_rel, sizeof (bitmask_rel));
- get_cap_mask (dev, "capabilities/key", bitmask_key, sizeof (bitmask_key));
-
- test_pointers(bitmask_abs, bitmask_key, bitmask_rel);
-
- test_key(bitmask_key);
-
- return 0;
-}
~ianmdlvl / elogind.git / blobdiff