Identify Input Devices

By Commandline

# head /proc/bus/input/devices 
I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=PNP0C0C/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input0
U: Uniq=
H: Handlers=kbd event0 
B: PROP=0
B: EV=3
B: KEY=10000000000000 0

# 

By C-Code

#include <fcntl.h>
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <linux/input.h>

int main(int argc, char **argv) {
	int fd;
	char name[256]= "Unknown";
	if ((fd = open(argv[1], O_RDONLY)) < 0) {
		perror("evdev open");
		exit(1);
	}
	if(ioctl(fd, EVIOCGNAME(sizeof(name)), name) < 0) {
		perror("evdev ioctl");
	}
	printf("The device on %s says its name is %s\n",
		   argv[1], name);
	close(fd);
	return 0;
}