扫描文件以查找签名（使用fread）

The point of the function is to get 2 file streams, a signature, and a scanned file. It's supposed to scan the scanned file, and if the signature is in it it'll return 1 (file infected). I tried using the same file as both parameters and it still returned 0, I tried debugging and I can't get the problem.The point of the function is to get 2 file stre