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-rw-r--r--src/udev/udev-builtin-evdev_id.c78
-rw-r--r--src/udev/udev-builtin.c1
-rw-r--r--src/udev/udev.h2
3 files changed, 81 insertions, 0 deletions
diff --git a/src/udev/udev-builtin-evdev_id.c b/src/udev/udev-builtin-evdev_id.c
new file mode 100644
index 0000000000..1b58bdda3d
--- /dev/null
+++ b/src/udev/udev-builtin-evdev_id.c
@@ -0,0 +1,78 @@
+/*
+ * evdev_id - extracts miscellaneous information from evdev devices
+ *
+ * Copyright (C) 2014 Red Hat
+ * Author:
+ * Carlos Garnacho <carlosg@gnome.org>
+ *
+ * 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 <linux/input.h>
+#include "udev.h"
+#include "util.h"
+
+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);
+}
+
+static int builtin_evdev_id(struct udev_device *dev, int argc, char *argv[], bool test) {
+ const char *subsystem;
+ const char *devnode;
+
+ subsystem = udev_device_get_subsystem(dev);
+
+ if (!subsystem || !streq(subsystem, "input"))
+ return EXIT_SUCCESS;
+
+ devnode = udev_device_get_devnode(dev);
+ /* not an evdev node */
+ if (!devnode)
+ return EXIT_SUCCESS;
+
+ extract_info(dev, devnode, test);
+
+ return EXIT_SUCCESS;
+}
+
+const struct udev_builtin udev_builtin_evdev_id = {
+ .name = "evdev_id",
+ .cmd = builtin_evdev_id,
+ .help = "evdev devices information",
+};
diff --git a/src/udev/udev-builtin.c b/src/udev/udev-builtin.c
index 1950ec23a1..9cfea5e03b 100644
--- a/src/udev/udev-builtin.c
+++ b/src/udev/udev-builtin.c
@@ -47,6 +47,7 @@ static const struct udev_builtin *builtins[] = {
#ifdef HAVE_ACL
[UDEV_BUILTIN_UACCESS] = &udev_builtin_uaccess,
#endif
+ [UDEV_BUILTIN_EVDEV_ID] = &udev_builtin_evdev_id,
};
void udev_builtin_init(struct udev *udev) {
diff --git a/src/udev/udev.h b/src/udev/udev.h
index dece6eccab..ce4188f881 100644
--- a/src/udev/udev.h
+++ b/src/udev/udev.h
@@ -164,6 +164,7 @@ enum udev_builtin_cmd {
#ifdef HAVE_ACL
UDEV_BUILTIN_UACCESS,
#endif
+ UDEV_BUILTIN_EVDEV_ID,
UDEV_BUILTIN_MAX
};
struct udev_builtin {
@@ -190,6 +191,7 @@ extern const struct udev_builtin udev_builtin_net_setup_link;
extern const struct udev_builtin udev_builtin_path_id;
extern const struct udev_builtin udev_builtin_usb_id;
extern const struct udev_builtin udev_builtin_uaccess;
+extern const struct udev_builtin udev_builtin_evdev_id;
void udev_builtin_init(struct udev *udev);
void udev_builtin_exit(struct udev *udev);
enum udev_builtin_cmd udev_builtin_lookup(const char *command);