#define HAVE_LARGEFILE_SUPPORT
#define _FILE_OFFSET_BITS 64
#define _LARGEFILE_SOURCE

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char ** argv){
	unsigned char buf[1024];
	unsigned long int c=0;
	FILE *fp;
	FILE *fpo;

	if(argc!=3){
		printf("Syntax: ./xorme source dest\n");
		exit(1);
	};

	fp=fopen(argv[1],"r");
	fpo=fopen(argv[2],"w");

	c=0;
	while(1){
		if(fread(buf,512,1,fp)!=1){
			printf("sector: %lx: err(eof?) while reading\n",c);
			exit(2);
		};

		*((unsigned long int*)buf) ^= c;

		if(fwrite(buf,512,1,fpo)!=1){
			printf("sector: %lx: err(:-/) while writing\n",c);
			exit(2);
		};
		
		c++;
	};
	return(0);
};