#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>

unsigned char get_xorval_fromfile(const char *infile)
{

    int fd;
    char *buf;
    ssize_t ret;
   
   printf("infile = %s\n", infile);
   fd=open(infile,O_RDONLY,0);

  if (fd<0){
        perror("Open");
        exit(1);
    }

    ret = read(fd,buf,1);

    if (ret<0) {
        perror("Read");
        exit(1);
      }

    while (ret>0){
            printf("I read %d bytes\n",ret);
            printf("buf=%s\n",buf);
            ret = read(fd,buf,1);
        }

}


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

    get_xorval_fromfile(argv[1]);
}