/* uber shitty yet effective fuzzer code */

#include <stdio.h>
#include <unistd.h>
#include <string.h>

#define NUM_FILES 8192

#define SIZE 6250577

int main(void)
{
	FILE *in, *out, *lout;
	unsigned int n, i, j;
	char *buf = malloc(SIZE);
	char *backup = malloc(SIZE);
	char outfile[1024];
	int rn, rn2, rn3, rn4;
	int rbyte;
	int numwrites;

	char tmp, tmp2, tmp3, tmp4;
	char cmd[4096];
	char crap[1024];
	int pid;
	char deathcmd[4096];

	in = fopen("good.png", "r");
	n = read(fileno(in), buf, SIZE);
	memcpy(backup, buf, n);

	lout=fopen("list", "w");
	

	srand(time(NULL));

	for (i=0;i<NUM_FILES;i++)
	{
		// seek and write
		numwrites=rand() % 16;

		numwrites++;

		printf("[+] Writing %d bytes\n", numwrites);
		for (j=0;j<numwrites;j++)
		{
			rbyte = rand() % 257;
			if (rbyte == 256)
				rbyte = -1;
			rn = rand() % n - 1;

			printf("[+] buf[%d] = %d\n", rn, rbyte);
			buf[rn] = rbyte;
		}

		sprintf(outfile, "/Volumes/Untitled/toorcon/bad-%d.png", i);
		out = fopen(outfile, "w");
		write(fileno(out), buf, n);
		fclose(out);

		fprintf(lout, "%s\n", outfile);

		memcpy(buf, backup, n);

	}
	fclose(lout);
}