#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/types.h>
#include <unistd.h>
#include <string.h>
#define BUF_SIZE 8192

int main(int argc, char *argv[])
{

        char *filename = "/proc/bus/input/devices";
        int fd; /* Input and output file descriptors */
        ssize_t fd_size;        /* Number of bytes returned by read() and write() */
        char buffer[BUF_SIZE];  /* Character buffer */

        fd = open(filename, O_RDONLY);
        if (fd == -1) {
                perror("open");
                return 2;
        }
        fd_size = read(fd, &buffer,BUF_SIZE);
        char *ptr;
        ptr=strstr(buffer,"Logitech G400s");
        ptr=strstr(ptr,"Handlers");
        ptr=strstr(ptr,"event");
        char *text = "/dev/input/";
        write(1,text,strlen(text));
        do {
                write(1,ptr,1);
        } while(*++ptr != ' ');
}