/sys/class/input/input4# ls -l
total 0
drwxr-xr-x  2 root root    0 Sep 14 22:46 capabilities
lrwxrwxrwx  1 root root    0 Sep 15 13:46 device -> ../../../devices/pci0000:00/0000:00:1f.2/usb1/1-1/1-1:1.0
drwxr-xr-x  2 root root    0 Sep 14 22:46 event4
drwxr-xr-x  2 root root    0 Sep 14 22:46 id
drwxr-xr-x  2 root root    0 Sep 14 22:46 mouse2
-r--r--r--  1 root root 4096 Sep 15 13:46 name
-r--r--r--  1 root root 4096 Sep 15 13:46 phys
drwxr-xr-x  2 root root    0 Sep 14 22:46 ts2
--w-------  1 root root 4096 Sep 15 13:46 uevent
-r--r--r--  1 root root 4096 Sep 15 13:46 uniq