#include <string.h>
#include <stdlib.h>
#include <limits.h>
+#include <linux/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 test_bit(bit, array) ((array[LONG(bit)] >> OFF(bit)) & 1)
/*
- * Read a capabilities/name file and return bitmask.
- * @param path File to open
+ * 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 (const char *path, unsigned long *bitmask, size_t max_size)
+static void get_cap_mask (struct udev_device *dev, const char* attr,
+ unsigned long *bitmask, size_t max_size)
{
- FILE* f;
- int i;
char text[4096];
+ int i;
char* word;
unsigned long val;
- f = fopen(path, "r");
- if (f == NULL) {
- perror("opening caps file");
- exit(1);
- }
- if (fgets(text, sizeof(text), f) == NULL) {
- perror("fgets");
- exit(1);
- }
- fclose(f);
-
+ snprintf(text, sizeof(text), "%s", udev_device_get_sysattr_value(dev, attr));
+
memset (bitmask, 0, max_size);
i = 0;
while ((word = strrchr(text, ' ')) != NULL) {
}
/* pointer devices */
-static void test_pointers (const unsigned long* bitmask_abs, const unsigned long* bitmask_key, const unsigned long* bitmask_rel)
+static void test_pointers (const unsigned long* bitmask_ev,
+ 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_PRESSURE, bitmask_abs))
- is_touchpad = 1;
+ if (!test_bit (EV_KEY, bitmask_ev))
+ return;
- if (test_bit (ABS_X, bitmask_abs) && test_bit (ABS_Y, bitmask_abs)) {
- if (test_bit (BTN_STYLUS, bitmask_key))
+ if (test_bit (EV_ABS, bitmask_ev) &&
+ 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_TOUCH, bitmask_key))
+ 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) ||
/* This path is taken by VMware's USB mouse, which has
* absolute axes, but no touch/pressure button. */
is_mouse = 1;
+ else if (test_bit (BTN_TOUCH, bitmask_key))
+ puts("ID_INPUT_TOUCHSCREEN=1");
}
- if (test_bit (REL_X, bitmask_rel) && test_bit (REL_Y, bitmask_rel))
+ if (test_bit (EV_REL, bitmask_ev) &&
+ test_bit (REL_X, bitmask_rel) && test_bit (REL_Y, bitmask_rel) &&
+ test_bit (BTN_MOUSE, bitmask_key))
is_mouse = 1;
if (is_mouse)
}
/* key like devices */
-static void test_key (const unsigned long* bitmask_key)
+static void test_key (const unsigned long* bitmask_ev,
+ const unsigned long* bitmask_key)
{
unsigned i;
unsigned long acc;
unsigned long mask;
/* do we have any KEY_* capability? */
+ if (!test_bit (EV_KEY, bitmask_ev))
+ return;
+
acc = 0;
for (i = 0; i < BTN_MISC/BITS_PER_LONG; ++i)
acc |= bitmask_key[i];
int main (int argc, char** argv)
{
- char capfile[PATH_MAX];
+ struct udev *udev;
+ struct udev_device *dev;
+
+ char devpath[PATH_MAX];
+ 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)];
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/ev") == NULL)
+ dev = udev_device_get_parent_with_subsystem_devtype(dev, "input", NULL);
+
+ /* 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");
- snprintf(capfile, sizeof(capfile), "/sys/%s/device/capabilities/abs", argv[1]);
- get_cap_mask (capfile, bitmask_abs, sizeof (bitmask_abs));
- snprintf(capfile, sizeof(capfile), "/sys/%s/device/capabilities/rel", argv[1]);
- get_cap_mask (capfile, bitmask_rel, sizeof (bitmask_rel));
- snprintf(capfile, sizeof(capfile), "/sys/%s/device/capabilities/key", argv[1]);
- get_cap_mask (capfile, bitmask_key, sizeof (bitmask_key));
+ get_cap_mask (dev, "capabilities/ev", bitmask_ev, sizeof (bitmask_ev));
+ 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_pointers(bitmask_ev, bitmask_abs, bitmask_key, bitmask_rel);
- test_key(bitmask_key);
+ test_key(bitmask_ev, bitmask_key);
return 0;
}
~ianmdlvl / elogind.git / blobdiff