Adding upstream version 255.4.upstream/255.4

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

1 files changed, 252 insertions, 0 deletions

diff --git a/src/udev/udev-builtin-keyboard.c b/src/udev/udev-builtin-keyboard.c
new file mode 100644
index 0000000..3903bc4
--- /dev/null
+++ b/src/udev/udev-builtin-keyboard.c
@@ -0,0 +1,252 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <sys/ioctl.h>
+#include <linux/input.h>
+
+#include "device-util.h"
+#include "fd-util.h"
+#include "parse-util.h"
+#include "stdio-util.h"
+#include "string-util.h"
+#include "strxcpyx.h"
+#include "udev-builtin.h"
+
+static const struct key_name *keyboard_lookup_key(const char *str, GPERF_LEN_TYPE len);
+#include "keyboard-keys-from-name.h"
+
+static int install_force_release(sd_device *dev, const unsigned *release, unsigned release_count) {
+        sd_device *atkbd;
+        const char *cur;
+        char codes[4096];
+        char *s;
+        size_t l;
+        unsigned i;
+        int r;
+
+        assert(dev);
+        assert(release);
+
+        r = sd_device_get_parent_with_subsystem_devtype(dev, "serio", NULL, &atkbd);
+        if (r < 0)
+                return log_device_error_errno(dev, r, "Failed to get serio parent: %m");
+
+        r = sd_device_get_sysattr_value(atkbd, "force_release", &cur);
+        if (r < 0)
+                return log_device_error_errno(atkbd, r, "Failed to get force-release attribute: %m");
+
+        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_device_debug(atkbd, "keyboard: updating force-release list with '%s'", codes);
+        r = sd_device_set_sysattr_value(atkbd, "force_release", codes);
+        if (r < 0)
+                return log_device_error_errno(atkbd, r, "Failed to set force-release attribute: %m");
+
+        return 0;
+}
+
+static int map_keycode(sd_device *dev, int fd, int scancode, const char *keycode) {
+        struct {
+                unsigned scan;
+                unsigned key;
+        } map;
+        const struct key_name *k;
+        unsigned keycode_num;
+        int r;
+
+        /* 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 */
+                r = safe_atou(keycode, &keycode_num);
+                if (r < 0)
+                        return log_device_error_errno(dev, r, "Failed to parse key identifier '%s': %m", keycode);
+        }
+
+        map.scan = scancode;
+        map.key = keycode_num;
+
+        log_device_debug(dev, "keyboard: mapping scan code %u (0x%x) to key code %u (0x%x)",
+                         map.scan, map.scan, map.key, map.key);
+
+        if (ioctl(fd, EVIOCSKEYCODE, &map) < 0)
+                return log_device_error_errno(dev, errno, "Failed to call EVIOCSKEYCODE with scan code 0x%x, and key code %u: %m", map.scan, map.key);
+
+        return 0;
+}
+
+static const 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 int override_abs(sd_device *dev, int fd, unsigned evcode, const char *value) {
+        struct input_absinfo absinfo;
+        const char *next;
+
+        if (ioctl(fd, EVIOCGABS(evcode), &absinfo) < 0)
+                return log_device_error_errno(dev, errno, "Failed to call EVIOCGABS");
+
+        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)
+                return log_device_error_errno(dev, SYNTHETIC_ERRNO(EINVAL),
+                                              "Failed to parse EV_ABS override '%s'", value);
+
+        log_device_debug(dev, "keyboard: %x overridden with %"PRIi32"/%"PRIi32"/%"PRIi32"/%"PRIi32"/%"PRIi32,
+                         evcode, absinfo.minimum, absinfo.maximum, absinfo.resolution, absinfo.fuzz, absinfo.flat);
+        if (ioctl(fd, EVIOCSABS(evcode), &absinfo) < 0)
+                return log_device_error_errno(dev, errno, "Failed to call EVIOCSABS");
+
+        return 0;
+}
+
+static int set_trackpoint_sensitivity(sd_device *dev, const char *value) {
+        sd_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 */
+        r = sd_device_get_parent_with_subsystem_devtype(dev, "serio", NULL, &pdev);
+        if (r < 0)
+                return log_device_error_errno(dev, r, "Failed to get serio parent: %m");
+
+        r = safe_atoi(value, &val_i);
+        if (r < 0)
+                return log_device_error_errno(dev, r, "Failed to parse POINTINGSTICK_SENSITIVITY '%s': %m", value);
+        else if (val_i < 0 || val_i > 255)
+                return log_device_error_errno(dev, SYNTHETIC_ERRNO(ERANGE), "POINTINGSTICK_SENSITIVITY %d outside range [0..255]", val_i);
+
+        xsprintf(val_s, "%d", val_i);
+
+        r = sd_device_set_sysattr_value(pdev, "sensitivity", val_s);
+        if (r < 0)
+                return log_device_error_errno(dev, r, "Failed to write 'sensitivity' attribute: %m");
+
+        return 0;
+}
+
+static int builtin_keyboard(UdevEvent *event, int argc, char *argv[], bool test) {
+        sd_device *dev = ASSERT_PTR(ASSERT_PTR(event)->dev);
+        unsigned release[1024];
+        unsigned release_count = 0;
+        _cleanup_close_ int fd = -EBADF;
+        const char *node;
+        int has_abs = -1, r;
+
+        r = sd_device_get_devname(dev, &node);
+        if (r < 0)
+                return log_device_error_errno(dev, r, "Failed to get device name: %m");
+
+        FOREACH_DEVICE_PROPERTY(dev, key, value)
+                if (startswith(key, "KEYBOARD_KEY_")) {
+                        const char *keycode = value;
+                        unsigned scancode;
+
+                        /* KEYBOARD_KEY_<hex scan code>=<key identifier string> */
+                        r = safe_atou_full(key + 13, 16, &scancode);
+                        if (r < 0) {
+                                log_device_warning_errno(dev, r, "Failed to parse scan code from \"%s\", ignoring: %m", key);
+                                continue;
+                        }
+
+                        /* 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 < 0) {
+                                fd = sd_device_open(dev, O_RDWR|O_CLOEXEC|O_NONBLOCK|O_NOCTTY);
+                                if (fd < 0)
+                                        return log_device_error_errno(dev, fd, "Failed to open device '%s': %m", node);
+                        }
+
+                        (void) map_keycode(dev, fd, scancode, keycode);
+                } else if (startswith(key, "EVDEV_ABS_")) {
+                        unsigned evcode;
+
+                        /* EVDEV_ABS_<EV_ABS code>=<min>:<max>:<res>:<fuzz>:<flat> */
+                        r = safe_atou_full(key + 10, 16, &evcode);
+                        if (r < 0) {
+                                log_device_warning_errno(dev, r, "Failed to parse EV_ABS code from \"%s\", ignoring: %m", key);
+                                continue;
+                        }
+
+                        if (fd < 0) {
+                                fd = sd_device_open(dev, O_RDWR|O_CLOEXEC|O_NONBLOCK|O_NOCTTY);
+                                if (fd < 0)
+                                        return log_device_error_errno(dev, fd, "Failed to open device '%s': %m", node);
+                        }
+
+                        if (has_abs == -1) {
+                                unsigned long bits;
+                                int rc;
+
+                                rc = ioctl(fd, EVIOCGBIT(0, sizeof(bits)), &bits);
+                                if (rc < 0)
+                                        return log_device_error_errno(dev, errno, "Failed to set EVIOCGBIT");
+
+                                has_abs = !!(bits & (1 << EV_ABS));
+                                if (!has_abs)
+                                        log_device_warning(dev, "EVDEV_ABS override set but no EV_ABS present on device");
+                        }
+
+                        if (!has_abs)
+                                continue;
+
+                        (void) override_abs(dev, fd, evcode, value);
+                } else if (streq(key, "POINTINGSTICK_SENSITIVITY"))
+                        (void) set_trackpoint_sensitivity(dev, value);
+
+        /* install list of force-release codes */
+        if (release_count > 0)
+                (void) install_force_release(dev, release, release_count);
+
+        return 0;
+}
+
+const UdevBuiltin udev_builtin_keyboard = {
+        .name = "keyboard",
+        .cmd = builtin_keyboard,
+        .help = "Keyboard scancode mapping and touchpad/pointingstick characteristics",
+};