[thirdparty/systemd.git] / src / udev / udev-builtin-input_id.c

/*
 * 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
 * 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <linux/limits.h>
#include <linux/input.h>

#include "fd-util.h"
#include "stdio-util.h"
#include "string-util.h"
#include "udev.h"
#include "util.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)

/* available as of kernel 3.11 */
#ifndef BTN_DPAD_UP
#define BTN_DPAD_UP 0x220
#endif /* BTN_DPAD_UP */

/* available as of kernel 3.13 */
#ifndef KEY_ALS_TOGGLE
#define KEY_ALS_TOGGLE 0x230
#endif /* KEY_ALS_TOGGLE */

struct range {
        unsigned start;
        unsigned end;
};

/* key code ranges above BTN_MISC (start is inclusive, stop is exclusive)*/
static const struct range high_key_blocks[] = {
        { KEY_OK, BTN_DPAD_UP },
        { KEY_ALS_TOGGLE, BTN_TRIGGER_HAPPY }
};

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;

        xsprintf(width, "%d", abs_size_mm(&xabsinfo));
        xsprintf(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
 * @param attr sysfs attribute name (e. g. "capabilities/key")
 * @param bitmask: Output array which has a sizeof of bitmask_size
 */
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) {
        const char *v;
        char text[4096];
        unsigned i;
        char* word;
        unsigned long val;

        v = udev_device_get_sysattr_value(pdev, attr);
        if (!v)
                v = "";

        xsprintf(text, "%s", v);
        log_debug("%s raw kernel attribute: %s", attr, text);

        memzero(bitmask, bitmask_size);
        i = 0;
        while ((word = strrchr(text, ' ')) != NULL) {
                val = strtoul (word+1, NULL, 16);
                if (i < bitmask_size/sizeof(unsigned long))
                        bitmask[i] = val;
                else
                        log_debug("ignoring %s block %lX which is larger than maximum size", attr, val);
                *word = '\0';
                ++i;
        }
        val = strtoul (text, NULL, 16);
        if (i < bitmask_size / sizeof(unsigned long))
                bitmask[i] = val;
        else
                log_debug("ignoring %s block %lX which is larger than maximum size", attr, val);

        if (test) {
                /* printf pattern with the right unsigned long number of hex chars */
                xsprintf(text, "  bit %%4u: %%0%zulX\n",
                         2 * sizeof(unsigned long));
                log_debug("%s decoded bit map:", attr);
                val = bitmask_size / sizeof (unsigned long);
                /* skip over leading zeros */
                while (bitmask[val-1] == 0 && val > 0)
                        --val;
                for (i = 0; i < val; ++i) {
                        DISABLE_WARNING_FORMAT_NONLITERAL;
                        log_debug(text, i * BITS_PER_LONG, bitmask[i]);
                        REENABLE_WARNING;
                }
        }
}

/* pointer devices */
static bool test_pointers(struct udev_device *dev,
                          const unsigned long* bitmask_ev,
                          const unsigned long* bitmask_abs,
                          const unsigned long* bitmask_key,
                          const unsigned long* bitmask_rel,
                          const unsigned long* bitmask_props,
                          bool test) {
        bool has_abs_coordinates = false;
        bool has_rel_coordinates = false;
        bool has_mt_coordinates = false;
        bool has_joystick_axes_or_buttons = false;
        bool is_direct = false;
        bool has_touch = false;
        bool has_3d_coordinates = false;
        bool has_keys = false;
        bool stylus_or_pen = false;
        bool finger_but_no_pen = false;
        bool has_mouse_button = false;
        bool is_mouse = false;
        bool is_touchpad = false;
        bool is_touchscreen = false;
        bool is_tablet = false;
        bool is_joystick = false;
        bool is_accelerometer = false;
        bool is_pointing_stick= false;

        has_keys = test_bit(EV_KEY, bitmask_ev);
        has_abs_coordinates = test_bit(ABS_X, bitmask_abs) && test_bit(ABS_Y, bitmask_abs);
        has_3d_coordinates = has_abs_coordinates && test_bit(ABS_Z, bitmask_abs);
        is_accelerometer = test_bit(INPUT_PROP_ACCELEROMETER, bitmask_props);

        if (!has_keys && has_3d_coordinates)
                is_accelerometer = true;

        if (is_accelerometer) {
                udev_builtin_add_property(dev, test, "ID_INPUT_ACCELEROMETER", "1");
                return true;
        }

        is_pointing_stick = test_bit(INPUT_PROP_POINTING_STICK, bitmask_props);
        stylus_or_pen = test_bit(BTN_STYLUS, bitmask_key) || test_bit(BTN_TOOL_PEN, bitmask_key);
        finger_but_no_pen = test_bit(BTN_TOOL_FINGER, bitmask_key) && !test_bit(BTN_TOOL_PEN, bitmask_key);
        has_mouse_button = test_bit(BTN_LEFT, bitmask_key);
        has_rel_coordinates = test_bit(EV_REL, bitmask_ev) && test_bit(REL_X, bitmask_rel) && test_bit(REL_Y, bitmask_rel);
        has_mt_coordinates = test_bit(ABS_MT_POSITION_X, bitmask_abs) && test_bit(ABS_MT_POSITION_Y, bitmask_abs);

        /* unset has_mt_coordinates if devices claims to have all abs axis */
        if (has_mt_coordinates && test_bit(ABS_MT_SLOT, bitmask_abs) && test_bit(ABS_MT_SLOT - 1, bitmask_abs))
                has_mt_coordinates = false;
        is_direct = test_bit(INPUT_PROP_DIRECT, bitmask_props);
        has_touch = test_bit(BTN_TOUCH, bitmask_key);
        /* joysticks don't necessarily have buttons; e. g.
         * rudders/pedals are joystick-like, but buttonless; they have
         * other fancy axes. Others have buttons only but no axes. */
        has_joystick_axes_or_buttons = test_bit(BTN_TRIGGER, bitmask_key) ||
                                       test_bit(BTN_TRIGGER_HAPPY, 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);

        if (has_abs_coordinates) {
                if (stylus_or_pen)
                        is_tablet = true;
                else if (finger_but_no_pen && !is_direct)
                        is_touchpad = true;
                else if (has_mouse_button)
                        /* This path is taken by VMware's USB mouse, which has
                         * absolute axes, but no touch/pressure button. */
                        is_mouse = true;
                else if (has_touch || is_direct)
                        is_touchscreen = true;
                else if (has_joystick_axes_or_buttons)
                        is_joystick = true;
        } else if (has_joystick_axes_or_buttons) {
                is_joystick = true;
        }

        if (has_mt_coordinates) {
                if (stylus_or_pen)
                        is_tablet = true;
                else if (finger_but_no_pen && !is_direct)
                        is_touchpad = true;
                else if (has_touch || is_direct)
                        is_touchscreen = true;
        }

        if (has_rel_coordinates && has_mouse_button)
                is_mouse = true;

        if (is_pointing_stick)
                udev_builtin_add_property(dev, test, "ID_INPUT_POINTINGSTICK", "1");
        if (is_mouse)
                udev_builtin_add_property(dev, test, "ID_INPUT_MOUSE", "1");
        if (is_touchpad)
                udev_builtin_add_property(dev, test, "ID_INPUT_TOUCHPAD", "1");
        if (is_touchscreen)
                udev_builtin_add_property(dev, test, "ID_INPUT_TOUCHSCREEN", "1");
        if (is_joystick)
                udev_builtin_add_property(dev, test, "ID_INPUT_JOYSTICK", "1");
        if (is_tablet)
                udev_builtin_add_property(dev, test, "ID_INPUT_TABLET", "1");

        return is_tablet || is_mouse || is_touchpad || is_touchscreen || is_joystick || is_pointing_stick;
}

/* key like devices */
static bool test_key(struct udev_device *dev,
                     const unsigned long* bitmask_ev,
                     const unsigned long* bitmask_key,
                     bool test) {
        unsigned i;
        unsigned long found;
        unsigned long mask;
        bool ret = false;

        /* do we have any KEY_* capability? */
        if (!test_bit(EV_KEY, bitmask_ev)) {
                log_debug("test_key: no EV_KEY capability");
                return false;
        }

        /* only consider KEY_* here, not BTN_* */
        found = 0;
        for (i = 0; i < BTN_MISC/BITS_PER_LONG; ++i) {
                found |= bitmask_key[i];
                log_debug("test_key: checking bit block %lu for any keys; found=%i", (unsigned long)i*BITS_PER_LONG, found > 0);
        }
        /* If there are no keys in the lower block, check the higher blocks */
        if (!found) {
                unsigned block;
                for (block = 0; block < (sizeof(high_key_blocks) / sizeof(struct range)); ++block) {
                        for (i = high_key_blocks[block].start; i < high_key_blocks[block].end; ++i) {
                                if (test_bit(i, bitmask_key)) {
                                        log_debug("test_key: Found key %x in high block", i);
                                        found = 1;
                                        break;
                                }
                        }
                }
        }

        if (found > 0) {
                udev_builtin_add_property(dev, test, "ID_INPUT_KEY", "1");
                ret = true;
        }

        /* 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) {
                udev_builtin_add_property(dev, test, "ID_INPUT_KEYBOARD", "1");
                ret = true;
        }

        return ret;
}

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)];
        unsigned long bitmask_props[NBITS(INPUT_PROP_MAX)];
        const char *sysname, *devnode;
        bool is_pointer;
        bool is_key;

        assert(dev);

        /* walk up the parental chain until we find the real input device; the
         * argument is very likely a subdevice of this, like eventN */
        pdev = dev;
        while (pdev != NULL && udev_device_get_sysattr_value(pdev, "capabilities/ev") == NULL)
                pdev = udev_device_get_parent_with_subsystem_devtype(pdev, "input", NULL);

        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);
                get_cap_mask(dev, pdev, "properties", bitmask_props, sizeof(bitmask_props), test);
                is_pointer = test_pointers(dev, bitmask_ev, bitmask_abs,
                                           bitmask_key, bitmask_rel,
                                           bitmask_props, test);
                is_key = test_key(dev, bitmask_ev, bitmask_key, test);
                /* Some evdev nodes have only a scrollwheel */
                if (!is_pointer && !is_key && test_bit(EV_REL, bitmask_ev) &&
                    (test_bit(REL_WHEEL, bitmask_rel) || test_bit(REL_HWHEEL, bitmask_rel)))
                        udev_builtin_add_property(dev, test, "ID_INPUT_KEY", "1");
                if (test_bit(EV_SW, bitmask_ev))
                        udev_builtin_add_property(dev, test, "ID_INPUT_SWITCH", "1");

        }

        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",
};
Commit	Line	Data
d7867b31	1	/*
24447733	2	* expose input properties via udev
d7867b31 KS	3	*
	4	* Copyright (C) 2009 Martin Pitt <martin.pitt@ubuntu.com>
	5	* Portions Copyright (C) 2004 David Zeuthen, <david@fubar.dk>
1298001e	6	* Copyright (C) 2011 Kay Sievers <kay@vrfy.org>
24447733	7	* Copyright (C) 2014 Carlos Garnacho <carlosg@gnome.org>
975a9007	8	* Copyright (C) 2014 David Herrmann <dh.herrmann@gmail.com>
d7867b31 KS	9	*
	10	* This program is free software: you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License as published by
	12	* the Free Software Foundation, either version 2 of the License, or
	13	* (at your option) any later version.
	14	*
	15	* This program is distributed in the hope that it will be useful,
	16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	18	* GNU General Public License for more details.
	19	*
	20	* You should have received a copy of the GNU General Public License
	21	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	22	*/
	23
07630cea LP	24	#include <errno.h>
07630cea LP	25	#include <stdarg.h>
d7867b31 KS	26	#include <stdio.h>
d7867b31 KS	27	#include <stdlib.h>
d7867b31	28	#include <string.h>
07630cea	29	#include <unistd.h>
d7867b31 KS	30	#include <linux/limits.h>
	31	#include <linux/input.h>
	32
3ffd4af2	33	#include "fd-util.h"
d054f0a4	34	#include "stdio-util.h"
07630cea	35	#include "string-util.h"
d7867b31	36	#include "udev.h"
24447733	37	#include "util.h"
d7867b31 KS	38
	39	/* we must use this kernel-compatible implementation */
	40	#define BITS_PER_LONG (sizeof(unsigned long) * 8)
	41	#define NBITS(x) ((((x)-1)/BITS_PER_LONG)+1)
	42	#define OFF(x) ((x)%BITS_PER_LONG)
	43	#define BIT(x) (1UL<<OFF(x))
	44	#define LONG(x) ((x)/BITS_PER_LONG)
	45	#define test_bit(bit, array) ((array[LONG(bit)] >> OFF(bit)) & 1)
	46
f472d466 NL	47	/* available as of kernel 3.11 */
	48	#ifndef BTN_DPAD_UP
	49	#define BTN_DPAD_UP 0x220
	50	#endif /* BTN_DPAD_UP */
	51
	52	/* available as of kernel 3.13 */
	53	#ifndef KEY_ALS_TOGGLE
	54	#define KEY_ALS_TOGGLE 0x230
	55	#endif /* KEY_ALS_TOGGLE */
	56
	57	struct range {
	58	unsigned start;
	59	unsigned end;
	60	};
	61
	62	/* key code ranges above BTN_MISC (start is inclusive, stop is exclusive)*/
	63	static const struct range high_key_blocks[] = {
	64	{ KEY_OK, BTN_DPAD_UP },
	65	{ KEY_ALS_TOGGLE, BTN_TRIGGER_HAPPY }
	66	};
	67
24447733 DH	68	static inline int abs_size_mm(const struct input_absinfo *absinfo) {
	69	/* Resolution is defined to be in units/mm for ABS_X/Y */
	70	return (absinfo->maximum - absinfo->minimum) / absinfo->resolution;
	71	}
	72
	73	static void extract_info(struct udev_device dev, const char devpath, bool test) {
	74	char width[DECIMAL_STR_MAX(int)], height[DECIMAL_STR_MAX(int)];
	75	struct input_absinfo xabsinfo = {}, yabsinfo = {};
	76	_cleanup_close_ int fd = -1;
	77
	78	fd = open(devpath, O_RDONLY\|O_CLOEXEC);
	79	if (fd < 0)
	80	return;
	81
	82	if (ioctl(fd, EVIOCGABS(ABS_X), &xabsinfo) < 0 \|\|
	83	ioctl(fd, EVIOCGABS(ABS_Y), &yabsinfo) < 0)
	84	return;
	85
	86	if (xabsinfo.resolution <= 0 \|\| yabsinfo.resolution <= 0)
	87	return;
	88
d054f0a4 DM	89	xsprintf(width, "%d", abs_size_mm(&xabsinfo));
d054f0a4 DM	90	xsprintf(height, "%d", abs_size_mm(&yabsinfo));
24447733 DH	91
	92	udev_builtin_add_property(dev, test, "ID_INPUT_WIDTH_MM", width);
	93	udev_builtin_add_property(dev, test, "ID_INPUT_HEIGHT_MM", height);
	94	}
	95
d7867b31 KS	96	/*
	97	* Read a capability attribute and return bitmask.
	98	* @param dev udev_device
	99	* @param attr sysfs attribute name (e. g. "capabilities/key")
	100	* @param bitmask: Output array which has a sizeof of bitmask_size
	101	*/
	102	static void get_cap_mask(struct udev_device *dev,
912541b0 KS	103	struct udev_device pdev, const char attr,
912541b0 KS	104	unsigned long *bitmask, size_t bitmask_size,
9ec6e95b	105	bool test) {
975a9007	106	const char *v;
912541b0 KS	107	char text[4096];
	108	unsigned i;
	109	char* word;
	110	unsigned long val;
	111
975a9007 DH	112	v = udev_device_get_sysattr_value(pdev, attr);
	113	if (!v)
	114	v = "";
	115
d054f0a4	116	xsprintf(text, "%s", v);
9f6445e3	117	log_debug("%s raw kernel attribute: %s", attr, text);
912541b0	118
29804cc1	119	memzero(bitmask, bitmask_size);
912541b0 KS	120	i = 0;
	121	while ((word = strrchr(text, ' ')) != NULL) {
	122	val = strtoul (word+1, NULL, 16);
	123	if (i < bitmask_size/sizeof(unsigned long))
	124	bitmask[i] = val;
	125	else
9f6445e3	126	log_debug("ignoring %s block %lX which is larger than maximum size", attr, val);
912541b0 KS	127	*word = '\0';
	128	++i;
	129	}
	130	val = strtoul (text, NULL, 16);
	131	if (i < bitmask_size / sizeof(unsigned long))
	132	bitmask[i] = val;
	133	else
9f6445e3	134	log_debug("ignoring %s block %lX which is larger than maximum size", attr, val);
912541b0 KS	135
	136	if (test) {
	137	/* printf pattern with the right unsigned long number of hex chars */
d054f0a4 DM	138	xsprintf(text, " bit %%4u: %%0%zulX\n",
d054f0a4 DM	139	2 * sizeof(unsigned long));
9f6445e3	140	log_debug("%s decoded bit map:", attr);
912541b0 KS	141	val = bitmask_size / sizeof (unsigned long);
	142	/* skip over leading zeros */
	143	while (bitmask[val-1] == 0 && val > 0)
	144	--val;
bcfce235 LP	145	for (i = 0; i < val; ++i) {
bcfce235 LP	146	DISABLE_WARNING_FORMAT_NONLITERAL;
baa30fbc	147	log_debug(text, i * BITS_PER_LONG, bitmask[i]);
bcfce235 LP	148	REENABLE_WARNING;
bcfce235 LP	149	}
912541b0	150	}
d7867b31 KS	151	}
	152
	153	/* pointer devices */
941a2aca	154	static bool test_pointers(struct udev_device *dev,
b914418a PH	155	const unsigned long* bitmask_ev,
	156	const unsigned long* bitmask_abs,
	157	const unsigned long* bitmask_key,
	158	const unsigned long* bitmask_rel,
	159	const unsigned long* bitmask_props,
	160	bool test) {
15264e5a AP	161	bool has_abs_coordinates = false;
15264e5a AP	162	bool has_rel_coordinates = false;
fa5a113d	163	bool has_mt_coordinates = false;
15264e5a	164	bool has_joystick_axes_or_buttons = false;
fa5a113d	165	bool is_direct = false;
15264e5a AP	166	bool has_touch = false;
	167	bool has_3d_coordinates = false;
	168	bool has_keys = false;
	169	bool stylus_or_pen = false;
	170	bool finger_but_no_pen = false;
	171	bool has_mouse_button = false;
	172	bool is_mouse = false;
	173	bool is_touchpad = false;
	174	bool is_touchscreen = false;
	175	bool is_tablet = false;
	176	bool is_joystick = false;
	177	bool is_accelerometer = false;
	178	bool is_pointing_stick= false;
	179
	180	has_keys = test_bit(EV_KEY, bitmask_ev);
	181	has_abs_coordinates = test_bit(ABS_X, bitmask_abs) && test_bit(ABS_Y, bitmask_abs);
	182	has_3d_coordinates = has_abs_coordinates && test_bit(ABS_Z, bitmask_abs);
	183	is_accelerometer = test_bit(INPUT_PROP_ACCELEROMETER, bitmask_props);
	184
	185	if (!has_keys && has_3d_coordinates)
	186	is_accelerometer = true;
	187
	188	if (is_accelerometer) {
bd1acc9f	189	udev_builtin_add_property(dev, test, "ID_INPUT_ACCELEROMETER", "1");
941a2aca	190	return true;
bd1acc9f HG	191	}
bd1acc9f HG	192
15264e5a AP	193	is_pointing_stick = test_bit(INPUT_PROP_POINTING_STICK, bitmask_props);
	194	stylus_or_pen = test_bit(BTN_STYLUS, bitmask_key) \|\| test_bit(BTN_TOOL_PEN, bitmask_key);
	195	finger_but_no_pen = test_bit(BTN_TOOL_FINGER, bitmask_key) && !test_bit(BTN_TOOL_PEN, bitmask_key);
	196	has_mouse_button = test_bit(BTN_LEFT, bitmask_key);
	197	has_rel_coordinates = test_bit(EV_REL, bitmask_ev) && test_bit(REL_X, bitmask_rel) && test_bit(REL_Y, bitmask_rel);
fa5a113d	198	has_mt_coordinates = test_bit(ABS_MT_POSITION_X, bitmask_abs) && test_bit(ABS_MT_POSITION_Y, bitmask_abs);
495968cf AP	199
495968cf AP	200	/* unset has_mt_coordinates if devices claims to have all abs axis */
9ed794a3	201	if (has_mt_coordinates && test_bit(ABS_MT_SLOT, bitmask_abs) && test_bit(ABS_MT_SLOT - 1, bitmask_abs))
495968cf	202	has_mt_coordinates = false;
fa5a113d	203	is_direct = test_bit(INPUT_PROP_DIRECT, bitmask_props);
15264e5a AP	204	has_touch = test_bit(BTN_TOUCH, bitmask_key);
	205	/* joysticks don't necessarily have buttons; e. g.
	206	* rudders/pedals are joystick-like, but buttonless; they have
2e856c63	207	* other fancy axes. Others have buttons only but no axes. */
15264e5a	208	has_joystick_axes_or_buttons = test_bit(BTN_TRIGGER, bitmask_key) \|\|
c874fed3	209	test_bit(BTN_TRIGGER_HAPPY, bitmask_key) \|\|
15264e5a AP	210	test_bit(BTN_A, bitmask_key) \|\|
	211	test_bit(BTN_1, bitmask_key) \|\|
	212	test_bit(ABS_RX, bitmask_abs) \|\|
	213	test_bit(ABS_RY, bitmask_abs) \|\|
	214	test_bit(ABS_RZ, bitmask_abs) \|\|
	215	test_bit(ABS_THROTTLE, bitmask_abs) \|\|
	216	test_bit(ABS_RUDDER, bitmask_abs) \|\|
	217	test_bit(ABS_WHEEL, bitmask_abs) \|\|
	218	test_bit(ABS_GAS, bitmask_abs) \|\|
	219	test_bit(ABS_BRAKE, bitmask_abs);
	220
	221	if (has_abs_coordinates) {
	222	if (stylus_or_pen)
	223	is_tablet = true;
fa5a113d	224	else if (finger_but_no_pen && !is_direct)
15264e5a AP	225	is_touchpad = true;
15264e5a AP	226	else if (has_mouse_button)
912541b0 KS	227	/* This path is taken by VMware's USB mouse, which has
912541b0 KS	228	* absolute axes, but no touch/pressure button. */
15264e5a	229	is_mouse = true;
1a3439ef	230	else if (has_touch \|\| is_direct)
15264e5a AP	231	is_touchscreen = true;
	232	else if (has_joystick_axes_or_buttons)
	233	is_joystick = true;
2e856c63 PH	234	} else if (has_joystick_axes_or_buttons) {
2e856c63 PH	235	is_joystick = true;
912541b0	236	}
2e856c63	237
d3a37494 AP	238	if (has_mt_coordinates) {
	239	if (stylus_or_pen)
	240	is_tablet = true;
	241	else if (finger_but_no_pen && !is_direct)
	242	is_touchpad = true;
	243	else if (has_touch \|\| is_direct)
	244	is_touchscreen = true;
	245	}
912541b0	246
15264e5a AP	247	if (has_rel_coordinates && has_mouse_button)
15264e5a AP	248	is_mouse = true;
912541b0	249
15264e5a AP	250	if (is_pointing_stick)
	251	udev_builtin_add_property(dev, test, "ID_INPUT_POINTINGSTICK", "1");
	252	if (is_mouse)
912541b0	253	udev_builtin_add_property(dev, test, "ID_INPUT_MOUSE", "1");
15264e5a	254	if (is_touchpad)
912541b0	255	udev_builtin_add_property(dev, test, "ID_INPUT_TOUCHPAD", "1");
15264e5a AP	256	if (is_touchscreen)
	257	udev_builtin_add_property(dev, test, "ID_INPUT_TOUCHSCREEN", "1");
	258	if (is_joystick)
	259	udev_builtin_add_property(dev, test, "ID_INPUT_JOYSTICK", "1");
	260	if (is_tablet)
	261	udev_builtin_add_property(dev, test, "ID_INPUT_TABLET", "1");
	262
	263	return is_tablet \|\| is_mouse \|\| is_touchpad \|\| is_touchscreen \|\| is_joystick \|\| is_pointing_stick;
d7867b31 KS	264	}
	265
	266	/* key like devices */
941a2aca	267	static bool test_key(struct udev_device *dev,
b914418a PH	268	const unsigned long* bitmask_ev,
	269	const unsigned long* bitmask_key,
	270	bool test) {
912541b0 KS	271	unsigned i;
	272	unsigned long found;
	273	unsigned long mask;
941a2aca	274	bool ret = false;
912541b0 KS	275
912541b0 KS	276	/* do we have any KEY_* capability? */
b914418a	277	if (!test_bit(EV_KEY, bitmask_ev)) {
9f6445e3	278	log_debug("test_key: no EV_KEY capability");
941a2aca	279	return false;
912541b0 KS	280	}
	281
	282	/* only consider KEY_* here, not BTN_* */
	283	found = 0;
	284	for (i = 0; i < BTN_MISC/BITS_PER_LONG; ++i) {
	285	found \|= bitmask_key[i];
9f6445e3	286	log_debug("test_key: checking bit block %lu for any keys; found=%i", (unsigned long)i*BITS_PER_LONG, found > 0);
912541b0	287	}
f472d466	288	/* If there are no keys in the lower block, check the higher blocks */
912541b0	289	if (!found) {
f472d466 NL	290	unsigned block;
	291	for (block = 0; block < (sizeof(high_key_blocks) / sizeof(struct range)); ++block) {
	292	for (i = high_key_blocks[block].start; i < high_key_blocks[block].end; ++i) {
	293	if (test_bit(i, bitmask_key)) {
	294	log_debug("test_key: Found key %x in high block", i);
	295	found = 1;
	296	break;
	297	}
912541b0 KS	298	}
	299	}
	300	}
	301
941a2aca	302	if (found > 0) {
912541b0	303	udev_builtin_add_property(dev, test, "ID_INPUT_KEY", "1");
941a2aca HG	304	ret = true;
941a2aca HG	305	}
912541b0 KS	306
	307	/* the first 32 bits are ESC, numbers, and Q to D; if we have all of
	308	* those, consider it a full keyboard; do not test KEY_RESERVED, though */
	309	mask = 0xFFFFFFFE;
941a2aca	310	if ((bitmask_key[0] & mask) == mask) {
912541b0	311	udev_builtin_add_property(dev, test, "ID_INPUT_KEYBOARD", "1");
941a2aca HG	312	ret = true;
	313	}
	314
	315	return ret;
d7867b31 KS	316	}
d7867b31 KS	317
9ec6e95b	318	static int builtin_input_id(struct udev_device dev, int argc, char argv[], bool test) {
912541b0 KS	319	struct udev_device *pdev;
	320	unsigned long bitmask_ev[NBITS(EV_MAX)];
	321	unsigned long bitmask_abs[NBITS(ABS_MAX)];
	322	unsigned long bitmask_key[NBITS(KEY_MAX)];
	323	unsigned long bitmask_rel[NBITS(REL_MAX)];
606df97b	324	unsigned long bitmask_props[NBITS(INPUT_PROP_MAX)];
24447733	325	const char sysname, devnode;
37186823 HG	326	bool is_pointer;
37186823 HG	327	bool is_key;
912541b0	328
3b64e4d4 TG	329	assert(dev);
3b64e4d4 TG	330
912541b0 KS	331	/* walk up the parental chain until we find the real input device; the
	332	* argument is very likely a subdevice of this, like eventN */
	333	pdev = dev;
	334	while (pdev != NULL && udev_device_get_sysattr_value(pdev, "capabilities/ev") == NULL)
	335	pdev = udev_device_get_parent_with_subsystem_devtype(pdev, "input", NULL);
	336
24447733 DH	337	if (pdev) {
	338	/* Use this as a flag that input devices were detected, so that this
	339	* program doesn't need to be called more than once per device */
	340	udev_builtin_add_property(dev, test, "ID_INPUT", "1");
	341	get_cap_mask(dev, pdev, "capabilities/ev", bitmask_ev, sizeof(bitmask_ev), test);
	342	get_cap_mask(dev, pdev, "capabilities/abs", bitmask_abs, sizeof(bitmask_abs), test);
	343	get_cap_mask(dev, pdev, "capabilities/rel", bitmask_rel, sizeof(bitmask_rel), test);
	344	get_cap_mask(dev, pdev, "capabilities/key", bitmask_key, sizeof(bitmask_key), test);
606df97b	345	get_cap_mask(dev, pdev, "properties", bitmask_props, sizeof(bitmask_props), test);
37186823 HG	346	is_pointer = test_pointers(dev, bitmask_ev, bitmask_abs,
	347	bitmask_key, bitmask_rel,
	348	bitmask_props, test);
	349	is_key = test_key(dev, bitmask_ev, bitmask_key, test);
	350	/* Some evdev nodes have only a scrollwheel */
	351	if (!is_pointer && !is_key && test_bit(EV_REL, bitmask_ev) &&
	352	(test_bit(REL_WHEEL, bitmask_rel) \|\| test_bit(REL_HWHEEL, bitmask_rel)))
	353	udev_builtin_add_property(dev, test, "ID_INPUT_KEY", "1");
64083a60 PH	354	if (test_bit(EV_SW, bitmask_ev))
	355	udev_builtin_add_property(dev, test, "ID_INPUT_SWITCH", "1");
	356
24447733 DH	357	}
	358
	359	devnode = udev_device_get_devnode(dev);
	360	sysname = udev_device_get_sysname(dev);
	361	if (devnode && sysname && startswith(sysname, "event"))
	362	extract_info(dev, devnode, test);
	363
912541b0	364	return EXIT_SUCCESS;
d7867b31 KS	365	}
	366
	367	const struct udev_builtin udev_builtin_input_id = {
912541b0 KS	368	.name = "input_id",
912541b0 KS	369	.cmd = builtin_input_id,
5ac0162c	370	.help = "Input device properties",
d7867b31	371	};