Adding upstream version 241.upstream/241upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 364 insertions, 0 deletions

diff --git a/src/udev/udev-builtin-input_id.c b/src/udev/udev-builtin-input_id.c
new file mode 100644
index 0000000..e3db55b
--- /dev/null
+++ b/src/udev/udev-builtin-input_id.c
@@ -0,0 +1,364 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * expose input properties via udev
+ *
+ * Portions Copyright © 2004 David Zeuthen, <david@fubar.dk>
+ * Copyright © 2014 Carlos Garnacho <carlosg@gnome.org>
+ */
+
+#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 "device-util.h"
+#include "fd-util.h"
+#include "missing.h"
+#include "stdio-util.h"
+#include "string-util.h"
+#include "udev-builtin.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)
+
+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 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(sd_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 sd_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(sd_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;
+
+        if (sd_device_get_sysattr_value(pdev, attr, &v) < 0)
+                v = "";
+
+        xsprintf(text, "%s", v);
+        log_device_debug(pdev, "%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_device_debug(pdev, "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_device_debug(pdev, "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_device_debug(pdev, "%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_device_debug(pdev, text, i * BITS_PER_LONG, bitmask[i]);
+                        REENABLE_WARNING;
+                }
+        }
+}
+
+/* pointer devices */
+static bool test_pointers(sd_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) {
+        int button, axis;
+        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);
+        for (button = BTN_MOUSE; button < BTN_JOYSTICK && !has_mouse_button; button++)
+                has_mouse_button = test_bit(button, 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.
+         *
+         * The BTN_JOYSTICK range starts after the mouse range, so a mouse
+         * with more than 16 buttons runs into the joystick range (e.g. Mad
+         * Catz Mad Catz M.M.O.TE). Skip those.
+         */
+        if (!test_bit(BTN_JOYSTICK - 1, bitmask_key)) {
+                for (button = BTN_JOYSTICK; button < BTN_DIGI && !has_joystick_axes_or_buttons; button++)
+                        has_joystick_axes_or_buttons = test_bit(button, bitmask_key);
+                for (button = BTN_TRIGGER_HAPPY1; button <= BTN_TRIGGER_HAPPY40 && !has_joystick_axes_or_buttons; button++)
+                        has_joystick_axes_or_buttons = test_bit(button, bitmask_key);
+                for (button = BTN_DPAD_UP; button <= BTN_DPAD_RIGHT && !has_joystick_axes_or_buttons; button++)
+                        has_joystick_axes_or_buttons = test_bit(button, bitmask_key);
+        }
+        for (axis = ABS_RX; axis < ABS_PRESSURE && !has_joystick_axes_or_buttons; axis++)
+                has_joystick_axes_or_buttons = test_bit(axis, 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 (!is_tablet && !is_touchpad && !is_joystick &&
+            has_mouse_button &&
+            (has_rel_coordinates ||
+            !has_abs_coordinates)) /* mouse buttons and no axis */
+                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(sd_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_device_debug(dev, "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_device_debug(dev, "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_device_debug(dev, "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 (FLAGS_SET(bitmask_key[0], mask)) {
+                udev_builtin_add_property(dev, test, "ID_INPUT_KEYBOARD", "1");
+                ret = true;
+        }
+
+        return ret;
+}
+
+static int builtin_input_id(sd_device *dev, int argc, char *argv[], bool test) {
+        sd_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 */
+        for (pdev = dev; pdev; ) {
+                const char *s;
+
+                if (sd_device_get_sysattr_value(pdev, "capabilities/ev", &s) >= 0)
+                        break;
+
+                if (sd_device_get_parent_with_subsystem_devtype(pdev, "input", NULL, &pdev) >= 0)
+                        continue;
+
+                pdev = NULL;
+                break;
+        }
+
+        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(pdev, "capabilities/ev", bitmask_ev, sizeof(bitmask_ev), test);
+                get_cap_mask(pdev, "capabilities/abs", bitmask_abs, sizeof(bitmask_abs), test);
+                get_cap_mask(pdev, "capabilities/rel", bitmask_rel, sizeof(bitmask_rel), test);
+                get_cap_mask(pdev, "capabilities/key", bitmask_key, sizeof(bitmask_key), test);
+                get_cap_mask(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");
+
+        }
+
+        if (sd_device_get_devname(dev, &devnode) >= 0 &&
+            sd_device_get_sysname(dev, &sysname) >= 0 &&
+            startswith(sysname, "event"))
+                extract_info(dev, devnode, test);
+
+        return 0;
+}
+
+const struct udev_builtin udev_builtin_input_id = {
+        .name = "input_id",
+        .cmd = builtin_input_id,
+        .help = "Input device properties",
+};