io.c

#include "stdio.h"
int main(int argc, char const *argv[])
{
  FILE *f;
	char buffer[4096];
	f = fopen("bits.txt", "w");
	while(1) {
		fwrite(buffer, 4096, 1, f);
	}
	return 0;
}

io.py

import signal
import sys

def on_interrupt(signal_num, stack_frame):
    f.close()
    sys.exit(0)

signal.signal(signal.SIGINT, on_interrupt)

f = open("bits2.txt", "wb")
ch = bytearray(4096)
while True:
    f.write(ch)