On Sun, Oct 31, 2010 at 7:39 AM, Laszlo Papp <djszapi@xxxxxxxxxxxx> wrote:
> On Sun, Oct 31, 2010 at 7:23 AM, Greg KH <greg@xxxxxxxxx> wrote:
>> On Sun, Oct 31, 2010 at 07:04:30AM -0700, Laszlo Papp wrote:
>>> Hi,
>>>
>>> You can check the code out more in-depth in the following with the
>>> produced output. This is the compilation command I used for testing:
>>> gcc -Wall -o test -ggdb -ludev main.c.
>>>
>>> I just would like to get the real input devices.. so VID/PID: (null)
>>> (null) and related device node entries are undesired.
>>
>> But those are "real" input devices, why do you think otherwise?
>>
>> If you don't want them, then filter them out by ignoring the event
>> types, but note that they are needed by your system to work properly
>> (i.e. x.org uses them.)
>>
>> So your code is working as designed, I just don't think that you
>> realized there are all of these input devices present :)
>>
>> thanks,
>>
>> greg k-h
>>
>
> root /home/djszapi # cat main.c
> #include <libudev.h>
> #include <stdio.h>
>
> int main()
> {
> struct udev *udev;
> struct udev_enumerate *enumerate;
> struct udev_list_entry *devices;
> struct udev_list_entry *dev_list_entry;
> struct udev_device *dev;
>
> udev = udev_new();
> if (!udev) {
> printf("Cannot create udev\n");
> return -1;
> }
>
> enumerate = udev_enumerate_new(udev);
> udev_enumerate_add_match_subsystem(enumerate, "input");
> udev_enumerate_scan_devices(enumerate);
> devices = udev_enumerate_get_list_entry(enumerate);
>
> udev_list_entry_foreach(dev_list_entry, devices) {
> const char *path;
> path = udev_list_entry_get_name(dev_list_entry);
> dev = udev_device_new_from_syspath(udev, path);
> dev = udev_device_get_parent_with_subsystem_devtype(dev, "input", 0);
> if (dev == 0)
> continue;
>
> printf("Device Node Path: %s, Name: %s\r\n", path,
> udev_device_get_sysattr_value(dev, "name"));
> printf("VID/PID: %s %s\r\n",
> udev_device_get_sysattr_value(dev,"id/vendor"),
> udev_device_get_sysattr_value(dev, "id/product"));
> udev_device_unref(dev);
> }
>
> udev_enumerate_unref(enumerate);
> udev_unref(udev);
>
> return 0;
> }
> root /home/djszapi # ./test
> Device Node Path:
> /sys/devices/LNXSYSTM:00/LNXPWRBN:00/input/input3/event3, Name: Power
> Button
> VID/PID: 0000 0001
> Device Node Path:
> /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input2/event2,
> Name: Power Button
> VID/PID: 0000 0001
> Device Node Path:
> /sys/devices/pci0000:00/0000:00:04.0/usb2/2-10/2-10:1.0/input/input5/event5,
> Name: Logitech USB Optical Mouse
> VID/PID: 046d c00c
> Device Node Path:
> /sys/devices/pci0000:00/0000:00:04.0/usb2/2-10/2-10:1.0/input/input5/mouse1,
> Name: Logitech USB Optical Mouse
> VID/PID: 046d c00c
> Device Node Path:
> /sys/devices/pci0000:00/0000:00:09.0/input/input6/event6, Name: HDA
> Digital PCBeep
> VID/PID: 10ec 0662
> Device Node Path:
> /sys/devices/platform/i8042/serio0/input/input1/event1, Name: AT
> Translated Set 2 keyboard
> VID/PID: 0001 0001
> Device Node Path: /sys/devices/platform/pcspkr/input/input4/event4,
> Name: PC Speaker
> VID/PID: 001f 0001
> Device Node Path: /sys/devices/virtual/input/input0/event0, Name:
> Macintosh mouse button emulation
> VID/PID: 0001 0001
> Device Node Path: /sys/devices/virtual/input/input0/mouse0, Name:
> Macintosh mouse button emulation
> VID/PID: 0001 0001
> root /home/djszapi #
>
> Better, but every device occurs two times o_O
>
> Best Regards,
> Laszlo Papp
>
root /sys/devices/platform/i8042/serio0/input/input1 # cd /home/djszapi/
root /home/djszapi # cat main.c
#include <libudev.h>
#include <stdio.h>
int main()
{
struct udev *udev;
struct udev_enumerate *enumerate;
struct udev_list_entry *devices;
struct udev_list_entry *dev_list_entry;
struct udev_device *dev;
struct udev_device *parent_dev;
udev = udev_new();
if (!udev) {
printf("Cannot create udev\n");
return -1;
}
enumerate = udev_enumerate_new(udev);
udev_enumerate_add_match_subsystem(enumerate, "input");
udev_enumerate_scan_devices(enumerate);
devices = udev_enumerate_get_list_entry(enumerate);
udev_list_entry_foreach(dev_list_entry, devices) {
const char *path;
path = udev_list_entry_get_name(dev_list_entry);
dev = udev_device_new_from_syspath(udev, path);
parent_dev =
udev_device_get_parent_with_subsystem_devtype(dev, "input", 0);
if (parent_dev) {
udev_device_unref(parent_dev);
continue;
}
printf("Device Node Path: %s, Name: %s\r\n", path,
udev_device_get_sysattr_value(dev, "name"));
printf("VID/PID: %s %s\r\n",
udev_device_get_sysattr_value(dev,"id/vendor"),
udev_device_get_sysattr_value(dev, "id/product"));
udev_device_unref(dev);
}
udev_enumerate_unref(enumerate);
udev_unref(udev);
return 0;
}
root /home/djszapi # gcc -Wall -o test -ggdb -ludev main.c
root /home/djszapi # ./test
Device Node Path: /sys/devices/LNXSYSTM:00/LNXPWRBN:00/input/input3,
Name: Power Button
VID/PID: 0000 0001
Device Node Path:
/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input2, Name:
Power Button
VID/PID: 0000 0001
Device Node Path:
/sys/devices/pci0000:00/0000:00:04.0/usb2/2-10/2-10:1.0/input/input5,
Name: Logitech USB Optical Mouse
VID/PID: 046d c00c
Device Node Path: /sys/devices/pci0000:00/0000:00:09.0/input/input6,
Name: HDA Digital PCBeep
VID/PID: 10ec 0662
Device Node Path: /sys/devices/platform/i8042/serio0/input/input1,
Name: AT Translated Set 2 keyboard
VID/PID: 0001 0001
Device Node Path: /sys/devices/platform/pcspkr/input/input4, Name: PC Speaker
VID/PID: 001f 0001
Device Node Path: /sys/devices/virtual/input/input0, Name: Macintosh
mouse button emulation
VID/PID: 0001 0001
Device Node Path: /sys/devices/virtual/input/mice, Name: (null)
VID/PID: (null) (null)
root /home/djszapi #
OK, seems to work, but please fix me, if this is not the way to do it.
Best Regards,
Laszlo Papp
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